./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe013_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe013_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:19:36,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:19:36,539 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:19:36,545 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:19:36,545 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:19:36,569 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:19:36,570 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:19:36,570 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:19:36,570 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:19:36,574 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:19:36,574 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:19:36,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:19:36,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:19:36,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:19:36,576 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:19:36,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:19:36,576 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:19:36,577 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:19:36,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:19:36,577 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:19:36,577 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:19:36,578 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:19:36,578 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:19:36,578 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:19:36,578 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:19:36,578 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:19:36,579 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:19:36,579 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:19:36,579 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:19:36,580 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:19:36,580 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:19:36,581 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:19:36,581 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:19:36,581 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:19:36,581 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:19:36,581 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:19:36,581 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:19:36,582 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:19:36,582 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:19:36,582 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:19:36,582 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:19:36,582 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:19:36,583 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:19:36,583 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:19:36,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:19:36,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:19:36,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:19:36,777 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:19:36,777 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:19:36,778 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe013_tso.yml/witness.yml [2024-06-20 15:19:36,890 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:19:36,893 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:19:36,894 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-20 15:19:38,010 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:19:38,247 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:19:38,248 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe013_tso.i [2024-06-20 15:19:38,259 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c3ffb78/a7a8f1cf9b3e43d28f72e72f566060ed/FLAG17a06f151 [2024-06-20 15:19:38,269 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10c3ffb78/a7a8f1cf9b3e43d28f72e72f566060ed [2024-06-20 15:19:38,270 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:19:38,271 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:19:38,271 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:19:38,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:19:38,275 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:19:38,276 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:19:36" (1/2) ... [2024-06-20 15:19:38,277 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e2a409 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:19:38, skipping insertion in model container [2024-06-20 15:19:38,277 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:19:36" (1/2) ... [2024-06-20 15:19:38,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74ce1127 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:19:38, skipping insertion in model container [2024-06-20 15:19:38,278 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:19:38" (2/2) ... [2024-06-20 15:19:38,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@37e2a409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38, skipping insertion in model container [2024-06-20 15:19:38,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:19:38" (2/2) ... [2024-06-20 15:19:38,279 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:19:38,317 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:19:38,319 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:19:38,319 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:19:38,319 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-20 15:19:38,320 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:19:38,320 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-20 15:19:38,367 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:19:38,619 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:19:38,628 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:19:38,718 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:19:38,743 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:19:38,744 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38 WrapperNode [2024-06-20 15:19:38,744 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:19:38,744 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:19:38,745 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:19:38,745 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:19:38,749 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,766 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,783 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-20 15:19:38,783 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:19:38,784 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:19:38,784 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:19:38,784 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:19:38,791 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,791 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,793 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,802 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:19:38,803 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,803 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,807 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,808 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,811 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:19:38,812 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:19:38,812 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:19:38,812 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:19:38,813 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (1/1) ... [2024-06-20 15:19:38,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:19:38,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:19:38,834 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:19:38,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:19:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:19:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:19:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:19:38,866 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:19:38,866 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:19:38,866 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:19:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 15:19:38,867 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 15:19:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:19:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:19:38,867 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:19:38,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:19:38,868 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:19:38,953 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:19:38,955 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:19:39,109 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:19:39,109 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:19:39,190 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:19:39,190 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:19:39,191 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:19:39 BoogieIcfgContainer [2024-06-20 15:19:39,191 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:19:39,192 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:19:39,193 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:19:39,195 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:19:39,195 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:19:36" (1/4) ... [2024-06-20 15:19:39,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c77ca and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:19:39, skipping insertion in model container [2024-06-20 15:19:39,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:19:38" (2/4) ... [2024-06-20 15:19:39,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c77ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:19:39, skipping insertion in model container [2024-06-20 15:19:39,196 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:19:38" (3/4) ... [2024-06-20 15:19:39,196 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@487c77ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:19:39, skipping insertion in model container [2024-06-20 15:19:39,197 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:19:39" (4/4) ... [2024-06-20 15:19:39,197 INFO L112 eAbstractionObserver]: Analyzing ICFG safe013_tso.i [2024-06-20 15:19:39,211 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:19:39,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 15:19:39,211 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:19:39,261 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:19:39,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:19:39,341 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 15:19:39,341 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:19:39,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:19:39,343 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 15:19:39,347 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 15:19:39,358 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:19:39,365 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;@49def0e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:19:39,365 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 15:19:39,368 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:19:39,368 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:19:39,368 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:19:39,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:39,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:19:39,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:39,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:39,374 INFO L85 PathProgramCache]: Analyzing trace with hash 219069644, now seen corresponding path program 1 times [2024-06-20 15:19:39,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:39,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280474288] [2024-06-20 15:19:39,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:39,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:39,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:39,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:39,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280474288] [2024-06-20 15:19:39,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280474288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:39,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:39,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:19:39,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295498065] [2024-06-20 15:19:39,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:39,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:19:39,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:39,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:19:39,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:19:39,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-20 15:19:39,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:39,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:39,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-20 15:19:39,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:40,051 INFO L124 PetriNetUnfolderBase]: 603/1012 cut-off events. [2024-06-20 15:19:40,054 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-20 15:19:40,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2004 conditions, 1012 events. 603/1012 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 5140 event pairs, 376 based on Foata normal form. 1/949 useless extension candidates. Maximal degree in co-relation 1992. Up to 929 conditions per place. [2024-06-20 15:19:40,069 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 28 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 15:19:40,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 163 flow [2024-06-20 15:19:40,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:19:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:19:40,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-20 15:19:40,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2024-06-20 15:19:40,100 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 86 transitions. [2024-06-20 15:19:40,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 163 flow [2024-06-20 15:19:40,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:40,105 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 15:19:40,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-20 15:19:40,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 15:19:40,110 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 15:19:40,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:40,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:40,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:40,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:19:40,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:40,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:40,112 INFO L85 PathProgramCache]: Analyzing trace with hash 73227933, now seen corresponding path program 1 times [2024-06-20 15:19:40,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:40,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180669201] [2024-06-20 15:19:40,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:40,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:40,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:40,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:40,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180669201] [2024-06-20 15:19:40,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180669201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:40,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:40,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:19:40,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389062829] [2024-06-20 15:19:40,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:40,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:19:40,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:40,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:19:40,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:19:40,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 41 [2024-06-20 15:19:40,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:40,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:40,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 41 [2024-06-20 15:19:40,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:40,416 INFO L124 PetriNetUnfolderBase]: 604/1021 cut-off events. [2024-06-20 15:19:40,417 INFO L125 PetriNetUnfolderBase]: For 205/213 co-relation queries the response was YES. [2024-06-20 15:19:40,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2329 conditions, 1021 events. 604/1021 cut-off events. For 205/213 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5196 event pairs, 320 based on Foata normal form. 7/994 useless extension candidates. Maximal degree in co-relation 2317. Up to 903 conditions per place. [2024-06-20 15:19:40,425 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 37 selfloop transitions, 11 changer transitions 0/58 dead transitions. [2024-06-20 15:19:40,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 260 flow [2024-06-20 15:19:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:19:40,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:19:40,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-20 15:19:40,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7134146341463414 [2024-06-20 15:19:40,429 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 117 transitions. [2024-06-20 15:19:40,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 260 flow [2024-06-20 15:19:40,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:19:40,431 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-20 15:19:40,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-20 15:19:40,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-20 15:19:40,432 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-20 15:19:40,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:40,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:40,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:40,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:19:40,435 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:40,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:40,436 INFO L85 PathProgramCache]: Analyzing trace with hash 627187612, now seen corresponding path program 1 times [2024-06-20 15:19:40,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:40,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995971687] [2024-06-20 15:19:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:40,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:40,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:40,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:40,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:40,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995971687] [2024-06-20 15:19:40,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995971687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:40,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:40,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:19:40,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075921235] [2024-06-20 15:19:40,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:40,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:19:40,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:40,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:19:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:19:40,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:40,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:40,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:40,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:40,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:40,772 INFO L124 PetriNetUnfolderBase]: 773/1281 cut-off events. [2024-06-20 15:19:40,772 INFO L125 PetriNetUnfolderBase]: For 881/898 co-relation queries the response was YES. [2024-06-20 15:19:40,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 1281 events. 773/1281 cut-off events. For 881/898 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6366 event pairs, 428 based on Foata normal form. 8/1287 useless extension candidates. Maximal degree in co-relation 3460. Up to 1172 conditions per place. [2024-06-20 15:19:40,780 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 41 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-20 15:19:40,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 57 transitions, 310 flow [2024-06-20 15:19:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:19:40,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:19:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-20 15:19:40,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:19:40,784 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 4 states and 106 transitions. [2024-06-20 15:19:40,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 57 transitions, 310 flow [2024-06-20 15:19:40,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 57 transitions, 306 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-20 15:19:40,788 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 210 flow [2024-06-20 15:19:40,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=210, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2024-06-20 15:19:40,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-20 15:19:40,789 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 210 flow [2024-06-20 15:19:40,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:40,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:40,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:40,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:19:40,790 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:40,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:40,791 INFO L85 PathProgramCache]: Analyzing trace with hash 816716713, now seen corresponding path program 1 times [2024-06-20 15:19:40,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:40,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913363885] [2024-06-20 15:19:40,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:40,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:41,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:41,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913363885] [2024-06-20 15:19:41,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913363885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:41,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:41,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785218231] [2024-06-20 15:19:41,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:41,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:41,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:41,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:41,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 210 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:41,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:41,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:41,231 INFO L124 PetriNetUnfolderBase]: 802/1335 cut-off events. [2024-06-20 15:19:41,231 INFO L125 PetriNetUnfolderBase]: For 1490/1512 co-relation queries the response was YES. [2024-06-20 15:19:41,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 1335 events. 802/1335 cut-off events. For 1490/1512 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6698 event pairs, 229 based on Foata normal form. 23/1353 useless extension candidates. Maximal degree in co-relation 3926. Up to 1101 conditions per place. [2024-06-20 15:19:41,239 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 17 changer transitions 0/82 dead transitions. [2024-06-20 15:19:41,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 82 transitions, 468 flow [2024-06-20 15:19:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:41,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:41,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 15:19:41,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2024-06-20 15:19:41,241 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 210 flow. Second operand 6 states and 167 transitions. [2024-06-20 15:19:41,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 82 transitions, 468 flow [2024-06-20 15:19:41,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 82 transitions, 450 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:19:41,247 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 272 flow [2024-06-20 15:19:41,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=272, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-06-20 15:19:41,248 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 12 predicate places. [2024-06-20 15:19:41,249 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 272 flow [2024-06-20 15:19:41,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:41,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:41,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:19:41,249 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:41,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:41,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2032019753, now seen corresponding path program 1 times [2024-06-20 15:19:41,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:41,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342830354] [2024-06-20 15:19:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:41,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:41,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:41,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:41,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342830354] [2024-06-20 15:19:41,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342830354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:41,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:41,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:19:41,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414025822] [2024-06-20 15:19:41,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:41,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:19:41,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:41,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:19:41,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:19:41,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:41,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:41,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:41,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:41,553 INFO L124 PetriNetUnfolderBase]: 950/1575 cut-off events. [2024-06-20 15:19:41,554 INFO L125 PetriNetUnfolderBase]: For 2550/2550 co-relation queries the response was YES. [2024-06-20 15:19:41,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5016 conditions, 1575 events. 950/1575 cut-off events. For 2550/2550 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8084 event pairs, 374 based on Foata normal form. 2/1575 useless extension candidates. Maximal degree in co-relation 4996. Up to 1425 conditions per place. [2024-06-20 15:19:41,563 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 57 selfloop transitions, 10 changer transitions 0/75 dead transitions. [2024-06-20 15:19:41,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 75 transitions, 490 flow [2024-06-20 15:19:41,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:19:41,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:19:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-20 15:19:41,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-20 15:19:41,564 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 272 flow. Second operand 5 states and 124 transitions. [2024-06-20 15:19:41,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 75 transitions, 490 flow [2024-06-20 15:19:41,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 75 transitions, 450 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:41,570 INFO L231 Difference]: Finished difference. Result has 58 places, 60 transitions, 328 flow [2024-06-20 15:19:41,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=328, PETRI_PLACES=58, PETRI_TRANSITIONS=60} [2024-06-20 15:19:41,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-20 15:19:41,572 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 60 transitions, 328 flow [2024-06-20 15:19:41,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:41,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:41,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:19:41,573 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:41,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:41,573 INFO L85 PathProgramCache]: Analyzing trace with hash 25667815, now seen corresponding path program 1 times [2024-06-20 15:19:41,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:41,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899944161] [2024-06-20 15:19:41,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:41,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:41,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:41,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:41,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899944161] [2024-06-20 15:19:41,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899944161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:41,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:41,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:19:41,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357619030] [2024-06-20 15:19:41,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:41,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:19:41,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:41,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:19:41,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:19:41,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:41,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 60 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:41,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:41,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:41,875 INFO L124 PetriNetUnfolderBase]: 918/1519 cut-off events. [2024-06-20 15:19:41,876 INFO L125 PetriNetUnfolderBase]: For 3396/3428 co-relation queries the response was YES. [2024-06-20 15:19:41,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5232 conditions, 1519 events. 918/1519 cut-off events. For 3396/3428 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7767 event pairs, 311 based on Foata normal form. 15/1517 useless extension candidates. Maximal degree in co-relation 5209. Up to 1303 conditions per place. [2024-06-20 15:19:41,885 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 25 changer transitions 0/95 dead transitions. [2024-06-20 15:19:41,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 654 flow [2024-06-20 15:19:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:19:41,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:19:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-20 15:19:41,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-20 15:19:41,886 INFO L175 Difference]: Start difference. First operand has 58 places, 60 transitions, 328 flow. Second operand 5 states and 140 transitions. [2024-06-20 15:19:41,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 654 flow [2024-06-20 15:19:41,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 95 transitions, 648 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-20 15:19:41,893 INFO L231 Difference]: Finished difference. Result has 64 places, 73 transitions, 480 flow [2024-06-20 15:19:41,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=480, PETRI_PLACES=64, PETRI_TRANSITIONS=73} [2024-06-20 15:19:41,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-20 15:19:41,895 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 73 transitions, 480 flow [2024-06-20 15:19:41,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:41,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:41,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:41,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:19:41,896 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:41,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:41,897 INFO L85 PathProgramCache]: Analyzing trace with hash 2119657435, now seen corresponding path program 2 times [2024-06-20 15:19:41,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:41,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046401103] [2024-06-20 15:19:41,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:41,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:42,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046401103] [2024-06-20 15:19:42,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046401103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:42,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:42,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:19:42,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630119256] [2024-06-20 15:19:42,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:42,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:19:42,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:42,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:19:42,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:19:42,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:42,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 73 transitions, 480 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:42,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:42,169 INFO L124 PetriNetUnfolderBase]: 932/1541 cut-off events. [2024-06-20 15:19:42,169 INFO L125 PetriNetUnfolderBase]: For 4997/5025 co-relation queries the response was YES. [2024-06-20 15:19:42,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6001 conditions, 1541 events. 932/1541 cut-off events. For 4997/5025 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7972 event pairs, 311 based on Foata normal form. 15/1542 useless extension candidates. Maximal degree in co-relation 5974. Up to 1328 conditions per place. [2024-06-20 15:19:42,179 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 24 changer transitions 0/92 dead transitions. [2024-06-20 15:19:42,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 92 transitions, 720 flow [2024-06-20 15:19:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:19:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:19:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-20 15:19:42,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 15:19:42,180 INFO L175 Difference]: Start difference. First operand has 64 places, 73 transitions, 480 flow. Second operand 5 states and 135 transitions. [2024-06-20 15:19:42,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 92 transitions, 720 flow [2024-06-20 15:19:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 92 transitions, 692 flow, removed 14 selfloop flow, removed 0 redundant places. [2024-06-20 15:19:42,186 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 536 flow [2024-06-20 15:19:42,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=454, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=536, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-20 15:19:42,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-20 15:19:42,187 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 536 flow [2024-06-20 15:19:42,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:42,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:42,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:19:42,188 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:42,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:42,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1882737432, now seen corresponding path program 1 times [2024-06-20 15:19:42,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:42,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902290062] [2024-06-20 15:19:42,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:42,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:42,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:42,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:42,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902290062] [2024-06-20 15:19:42,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902290062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:42,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:42,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:42,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945702176] [2024-06-20 15:19:42,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:42,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:42,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:42,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:42,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:42,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:42,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 536 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:42,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:42,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:42,466 INFO L124 PetriNetUnfolderBase]: 983/1631 cut-off events. [2024-06-20 15:19:42,466 INFO L125 PetriNetUnfolderBase]: For 5759/5762 co-relation queries the response was YES. [2024-06-20 15:19:42,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 1631 events. 983/1631 cut-off events. For 5759/5762 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8404 event pairs, 347 based on Foata normal form. 2/1629 useless extension candidates. Maximal degree in co-relation 6258. Up to 1415 conditions per place. [2024-06-20 15:19:42,477 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 84 selfloop transitions, 20 changer transitions 0/112 dead transitions. [2024-06-20 15:19:42,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 112 transitions, 912 flow [2024-06-20 15:19:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:42,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:42,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:19:42,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-20 15:19:42,478 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 536 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:19:42,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 112 transitions, 912 flow [2024-06-20 15:19:42,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 112 transitions, 852 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:42,486 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 628 flow [2024-06-20 15:19:42,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=628, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2024-06-20 15:19:42,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-20 15:19:42,487 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 628 flow [2024-06-20 15:19:42,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:42,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:42,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:19:42,487 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:42,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1269945300, now seen corresponding path program 2 times [2024-06-20 15:19:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:42,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35528905] [2024-06-20 15:19:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35528905] [2024-06-20 15:19:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35528905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:42,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:42,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141457656] [2024-06-20 15:19:42,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:42,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:42,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:42,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:42,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 628 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:42,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:42,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:42,782 INFO L124 PetriNetUnfolderBase]: 994/1647 cut-off events. [2024-06-20 15:19:42,782 INFO L125 PetriNetUnfolderBase]: For 6980/6980 co-relation queries the response was YES. [2024-06-20 15:19:42,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6698 conditions, 1647 events. 994/1647 cut-off events. For 6980/6980 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8479 event pairs, 346 based on Foata normal form. 2/1644 useless extension candidates. Maximal degree in co-relation 6664. Up to 1427 conditions per place. [2024-06-20 15:19:42,793 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 26 changer transitions 0/114 dead transitions. [2024-06-20 15:19:42,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 964 flow [2024-06-20 15:19:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:42,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:42,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:19:42,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 15:19:42,794 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 628 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:19:42,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 964 flow [2024-06-20 15:19:42,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 114 transitions, 930 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-20 15:19:42,804 INFO L231 Difference]: Finished difference. Result has 80 places, 93 transitions, 706 flow [2024-06-20 15:19:42,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=706, PETRI_PLACES=80, PETRI_TRANSITIONS=93} [2024-06-20 15:19:42,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-20 15:19:42,805 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 93 transitions, 706 flow [2024-06-20 15:19:42,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:42,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:42,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:19:42,805 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:42,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1438885400, now seen corresponding path program 3 times [2024-06-20 15:19:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:42,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453151539] [2024-06-20 15:19:42,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:42,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:42,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453151539] [2024-06-20 15:19:42,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453151539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:42,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:42,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:42,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970529601] [2024-06-20 15:19:42,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:42,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:42,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:42,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:42,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:42,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 93 transitions, 706 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:42,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:42,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:42,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:43,088 INFO L124 PetriNetUnfolderBase]: 989/1640 cut-off events. [2024-06-20 15:19:43,088 INFO L125 PetriNetUnfolderBase]: For 8010/8010 co-relation queries the response was YES. [2024-06-20 15:19:43,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6824 conditions, 1640 events. 989/1640 cut-off events. For 8010/8010 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8423 event pairs, 346 based on Foata normal form. 2/1637 useless extension candidates. Maximal degree in co-relation 6788. Up to 1422 conditions per place. [2024-06-20 15:19:43,104 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 79 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-06-20 15:19:43,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 112 transitions, 962 flow [2024-06-20 15:19:43,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:43,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:19:43,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:19:43,105 INFO L175 Difference]: Start difference. First operand has 80 places, 93 transitions, 706 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:19:43,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 112 transitions, 962 flow [2024-06-20 15:19:43,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 112 transitions, 934 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-20 15:19:43,114 INFO L231 Difference]: Finished difference. Result has 85 places, 93 transitions, 736 flow [2024-06-20 15:19:43,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=678, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=736, PETRI_PLACES=85, PETRI_TRANSITIONS=93} [2024-06-20 15:19:43,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-20 15:19:43,116 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 93 transitions, 736 flow [2024-06-20 15:19:43,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:43,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:43,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:43,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:19:43,116 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:43,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:43,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1439162230, now seen corresponding path program 1 times [2024-06-20 15:19:43,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:43,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519633957] [2024-06-20 15:19:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:43,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:43,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:43,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:43,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519633957] [2024-06-20 15:19:43,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519633957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:43,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:43,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:43,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511605935] [2024-06-20 15:19:43,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:43,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:43,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:43,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:43,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:43,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:43,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 93 transitions, 736 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:43,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:43,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:43,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:43,447 INFO L124 PetriNetUnfolderBase]: 981/1633 cut-off events. [2024-06-20 15:19:43,447 INFO L125 PetriNetUnfolderBase]: For 9255/9255 co-relation queries the response was YES. [2024-06-20 15:19:43,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6887 conditions, 1633 events. 981/1633 cut-off events. For 9255/9255 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 8411 event pairs, 323 based on Foata normal form. 4/1635 useless extension candidates. Maximal degree in co-relation 6849. Up to 1452 conditions per place. [2024-06-20 15:19:43,457 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 95 selfloop transitions, 12 changer transitions 0/115 dead transitions. [2024-06-20 15:19:43,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 115 transitions, 1016 flow [2024-06-20 15:19:43,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:43,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:19:43,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:19:43,458 INFO L175 Difference]: Start difference. First operand has 85 places, 93 transitions, 736 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:19:43,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 115 transitions, 1016 flow [2024-06-20 15:19:43,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 115 transitions, 966 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:43,471 INFO L231 Difference]: Finished difference. Result has 87 places, 95 transitions, 737 flow [2024-06-20 15:19:43,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=737, PETRI_PLACES=87, PETRI_TRANSITIONS=95} [2024-06-20 15:19:43,471 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-20 15:19:43,471 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 95 transitions, 737 flow [2024-06-20 15:19:43,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:43,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:43,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:43,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:19:43,472 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:43,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:43,472 INFO L85 PathProgramCache]: Analyzing trace with hash -460282662, now seen corresponding path program 1 times [2024-06-20 15:19:43,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:43,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033234963] [2024-06-20 15:19:43,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:43,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:43,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:43,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:43,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033234963] [2024-06-20 15:19:43,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033234963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:43,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:43,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383293690] [2024-06-20 15:19:43,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:43,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:43,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:43,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:43,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:43,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 95 transitions, 737 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:43,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:43,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:43,831 INFO L124 PetriNetUnfolderBase]: 954/1592 cut-off events. [2024-06-20 15:19:43,831 INFO L125 PetriNetUnfolderBase]: For 11527/11550 co-relation queries the response was YES. [2024-06-20 15:19:43,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7072 conditions, 1592 events. 954/1592 cut-off events. For 11527/11550 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 8279 event pairs, 280 based on Foata normal form. 18/1563 useless extension candidates. Maximal degree in co-relation 7033. Up to 1343 conditions per place. [2024-06-20 15:19:43,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 81 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-20 15:19:43,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 125 transitions, 1065 flow [2024-06-20 15:19:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-20 15:19:43,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-20 15:19:43,842 INFO L175 Difference]: Start difference. First operand has 87 places, 95 transitions, 737 flow. Second operand 6 states and 164 transitions. [2024-06-20 15:19:43,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 125 transitions, 1065 flow [2024-06-20 15:19:43,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 125 transitions, 1032 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:43,853 INFO L231 Difference]: Finished difference. Result has 89 places, 99 transitions, 799 flow [2024-06-20 15:19:43,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=799, PETRI_PLACES=89, PETRI_TRANSITIONS=99} [2024-06-20 15:19:43,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-20 15:19:43,854 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 99 transitions, 799 flow [2024-06-20 15:19:43,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:43,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:43,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:43,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:19:43,854 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:43,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:43,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1103016314, now seen corresponding path program 2 times [2024-06-20 15:19:43,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:43,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693858381] [2024-06-20 15:19:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:43,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:43,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:43,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:43,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693858381] [2024-06-20 15:19:43,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693858381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:43,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:43,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:43,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333149131] [2024-06-20 15:19:43,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:43,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:43,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:43,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:43,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:44,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:44,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 99 transitions, 799 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:44,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:44,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:44,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:44,194 INFO L124 PetriNetUnfolderBase]: 982/1644 cut-off events. [2024-06-20 15:19:44,195 INFO L125 PetriNetUnfolderBase]: For 13780/13816 co-relation queries the response was YES. [2024-06-20 15:19:44,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7717 conditions, 1644 events. 982/1644 cut-off events. For 13780/13816 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 8662 event pairs, 281 based on Foata normal form. 25/1616 useless extension candidates. Maximal degree in co-relation 7677. Up to 1275 conditions per place. [2024-06-20 15:19:44,206 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 47 changer transitions 0/135 dead transitions. [2024-06-20 15:19:44,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 135 transitions, 1259 flow [2024-06-20 15:19:44,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:44,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-20 15:19:44,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6788617886178862 [2024-06-20 15:19:44,207 INFO L175 Difference]: Start difference. First operand has 89 places, 99 transitions, 799 flow. Second operand 6 states and 167 transitions. [2024-06-20 15:19:44,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 135 transitions, 1259 flow [2024-06-20 15:19:44,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 135 transitions, 1194 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:44,221 INFO L231 Difference]: Finished difference. Result has 91 places, 110 transitions, 940 flow [2024-06-20 15:19:44,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=734, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=940, PETRI_PLACES=91, PETRI_TRANSITIONS=110} [2024-06-20 15:19:44,221 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-20 15:19:44,221 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 110 transitions, 940 flow [2024-06-20 15:19:44,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:44,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:44,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:19:44,222 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:44,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1176313978, now seen corresponding path program 3 times [2024-06-20 15:19:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762930798] [2024-06-20 15:19:44,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:44,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:44,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:44,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762930798] [2024-06-20 15:19:44,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762930798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:44,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:44,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:44,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100335513] [2024-06-20 15:19:44,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:44,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:44,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:44,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:44,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:44,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:44,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 110 transitions, 940 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:44,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:44,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:44,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:44,506 INFO L124 PetriNetUnfolderBase]: 985/1644 cut-off events. [2024-06-20 15:19:44,506 INFO L125 PetriNetUnfolderBase]: For 16035/16067 co-relation queries the response was YES. [2024-06-20 15:19:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8184 conditions, 1644 events. 985/1644 cut-off events. For 16035/16067 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 8730 event pairs, 294 based on Foata normal form. 19/1607 useless extension candidates. Maximal degree in co-relation 8143. Up to 1283 conditions per place. [2024-06-20 15:19:44,537 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 69 selfloop transitions, 43 changer transitions 0/131 dead transitions. [2024-06-20 15:19:44,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 131 transitions, 1268 flow [2024-06-20 15:19:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:44,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:44,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-20 15:19:44,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-20 15:19:44,539 INFO L175 Difference]: Start difference. First operand has 91 places, 110 transitions, 940 flow. Second operand 6 states and 161 transitions. [2024-06-20 15:19:44,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 131 transitions, 1268 flow [2024-06-20 15:19:44,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1211 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-20 15:19:44,555 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 979 flow [2024-06-20 15:19:44,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=979, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-20 15:19:44,556 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-20 15:19:44,556 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 979 flow [2024-06-20 15:19:44,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:44,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:44,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:44,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:19:44,556 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:44,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1698585732, now seen corresponding path program 1 times [2024-06-20 15:19:44,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:44,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016788023] [2024-06-20 15:19:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:44,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:44,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:44,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016788023] [2024-06-20 15:19:44,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016788023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:44,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:44,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-20 15:19:44,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789542197] [2024-06-20 15:19:44,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:44,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-20 15:19:44,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-20 15:19:44,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-20 15:19:44,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:44,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 979 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:44,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:44,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:44,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:44,809 INFO L124 PetriNetUnfolderBase]: 942/1582 cut-off events. [2024-06-20 15:19:44,810 INFO L125 PetriNetUnfolderBase]: For 15408/15413 co-relation queries the response was YES. [2024-06-20 15:19:44,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7831 conditions, 1582 events. 942/1582 cut-off events. For 15408/15413 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8330 event pairs, 288 based on Foata normal form. 7/1580 useless extension candidates. Maximal degree in co-relation 7787. Up to 1339 conditions per place. [2024-06-20 15:19:44,821 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 81 selfloop transitions, 18 changer transitions 0/119 dead transitions. [2024-06-20 15:19:44,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 119 transitions, 1203 flow [2024-06-20 15:19:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:19:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:19:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-20 15:19:44,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-20 15:19:44,822 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 979 flow. Second operand 4 states and 105 transitions. [2024-06-20 15:19:44,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 119 transitions, 1203 flow [2024-06-20 15:19:44,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 119 transitions, 1113 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:44,839 INFO L231 Difference]: Finished difference. Result has 96 places, 110 transitions, 936 flow [2024-06-20 15:19:44,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=936, PETRI_PLACES=96, PETRI_TRANSITIONS=110} [2024-06-20 15:19:44,840 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-20 15:19:44,840 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 110 transitions, 936 flow [2024-06-20 15:19:44,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:44,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:44,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:44,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:19:44,840 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:44,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1123743863, now seen corresponding path program 1 times [2024-06-20 15:19:44,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:44,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689882643] [2024-06-20 15:19:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:44,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:44,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:44,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689882643] [2024-06-20 15:19:44,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689882643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:44,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:44,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:44,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206028005] [2024-06-20 15:19:44,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:44,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:44,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:44,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:44,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:44,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:44,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 110 transitions, 936 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:44,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:44,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:44,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:45,201 INFO L124 PetriNetUnfolderBase]: 1008/1669 cut-off events. [2024-06-20 15:19:45,201 INFO L125 PetriNetUnfolderBase]: For 16463/16463 co-relation queries the response was YES. [2024-06-20 15:19:45,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8190 conditions, 1669 events. 1008/1669 cut-off events. For 16463/16463 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8538 event pairs, 301 based on Foata normal form. 2/1669 useless extension candidates. Maximal degree in co-relation 8145. Up to 1476 conditions per place. [2024-06-20 15:19:45,211 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 124 selfloop transitions, 16 changer transitions 0/148 dead transitions. [2024-06-20 15:19:45,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 148 transitions, 1354 flow [2024-06-20 15:19:45,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:45,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:45,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:19:45,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:19:45,213 INFO L175 Difference]: Start difference. First operand has 96 places, 110 transitions, 936 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:19:45,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 148 transitions, 1354 flow [2024-06-20 15:19:45,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 148 transitions, 1304 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:45,229 INFO L231 Difference]: Finished difference. Result has 102 places, 119 transitions, 1012 flow [2024-06-20 15:19:45,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1012, PETRI_PLACES=102, PETRI_TRANSITIONS=119} [2024-06-20 15:19:45,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-20 15:19:45,231 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 119 transitions, 1012 flow [2024-06-20 15:19:45,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:45,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:45,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:45,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:19:45,232 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:45,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:45,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1236042889, now seen corresponding path program 2 times [2024-06-20 15:19:45,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:45,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181437739] [2024-06-20 15:19:45,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:45,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:45,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:45,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:45,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:45,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181437739] [2024-06-20 15:19:45,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181437739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:45,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:45,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:45,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175359109] [2024-06-20 15:19:45,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:45,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:45,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:45,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:45,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:45,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:45,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 119 transitions, 1012 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:45,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:45,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:45,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:45,557 INFO L124 PetriNetUnfolderBase]: 1035/1718 cut-off events. [2024-06-20 15:19:45,558 INFO L125 PetriNetUnfolderBase]: For 18944/18947 co-relation queries the response was YES. [2024-06-20 15:19:45,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8785 conditions, 1718 events. 1035/1718 cut-off events. For 18944/18947 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8866 event pairs, 303 based on Foata normal form. 2/1716 useless extension candidates. Maximal degree in co-relation 8738. Up to 1393 conditions per place. [2024-06-20 15:19:45,569 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 113 selfloop transitions, 42 changer transitions 0/163 dead transitions. [2024-06-20 15:19:45,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 163 transitions, 1628 flow [2024-06-20 15:19:45,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:45,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:45,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-20 15:19:45,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:19:45,570 INFO L175 Difference]: Start difference. First operand has 102 places, 119 transitions, 1012 flow. Second operand 7 states and 182 transitions. [2024-06-20 15:19:45,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 163 transitions, 1628 flow [2024-06-20 15:19:45,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 163 transitions, 1582 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:45,590 INFO L231 Difference]: Finished difference. Result has 108 places, 132 transitions, 1200 flow [2024-06-20 15:19:45,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1200, PETRI_PLACES=108, PETRI_TRANSITIONS=132} [2024-06-20 15:19:45,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 15:19:45,590 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 132 transitions, 1200 flow [2024-06-20 15:19:45,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:45,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:45,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:45,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:19:45,591 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:45,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:45,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1236250279, now seen corresponding path program 3 times [2024-06-20 15:19:45,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:45,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207647384] [2024-06-20 15:19:45,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:45,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:45,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:45,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:45,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:45,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207647384] [2024-06-20 15:19:45,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207647384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:45,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73559903] [2024-06-20 15:19:45,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:45,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:45,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:45,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:45,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 132 transitions, 1200 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:45,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:45,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:45,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:45,910 INFO L124 PetriNetUnfolderBase]: 1030/1711 cut-off events. [2024-06-20 15:19:45,910 INFO L125 PetriNetUnfolderBase]: For 21300/21303 co-relation queries the response was YES. [2024-06-20 15:19:45,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9254 conditions, 1711 events. 1030/1711 cut-off events. For 21300/21303 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8808 event pairs, 303 based on Foata normal form. 2/1709 useless extension candidates. Maximal degree in co-relation 9204. Up to 1388 conditions per place. [2024-06-20 15:19:45,921 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 112 selfloop transitions, 41 changer transitions 0/161 dead transitions. [2024-06-20 15:19:45,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 161 transitions, 1647 flow [2024-06-20 15:19:45,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:45,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:45,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:19:45,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:19:45,923 INFO L175 Difference]: Start difference. First operand has 108 places, 132 transitions, 1200 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:19:45,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 161 transitions, 1647 flow [2024-06-20 15:19:45,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 161 transitions, 1605 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-20 15:19:45,947 INFO L231 Difference]: Finished difference. Result has 114 places, 132 transitions, 1248 flow [2024-06-20 15:19:45,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1248, PETRI_PLACES=114, PETRI_TRANSITIONS=132} [2024-06-20 15:19:45,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-20 15:19:45,948 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 132 transitions, 1248 flow [2024-06-20 15:19:45,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:45,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:45,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:45,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:19:45,949 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:45,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:45,949 INFO L85 PathProgramCache]: Analyzing trace with hash 166448715, now seen corresponding path program 1 times [2024-06-20 15:19:45,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:45,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145033779] [2024-06-20 15:19:45,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:45,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:46,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:46,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:46,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145033779] [2024-06-20 15:19:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145033779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:46,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844129963] [2024-06-20 15:19:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:46,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:46,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:46,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:46,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 132 transitions, 1248 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:46,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:46,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:46,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:46,381 INFO L124 PetriNetUnfolderBase]: 1047/1738 cut-off events. [2024-06-20 15:19:46,381 INFO L125 PetriNetUnfolderBase]: For 23661/23664 co-relation queries the response was YES. [2024-06-20 15:19:46,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9533 conditions, 1738 events. 1047/1738 cut-off events. For 23661/23664 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8977 event pairs, 299 based on Foata normal form. 4/1738 useless extension candidates. Maximal degree in co-relation 9481. Up to 1487 conditions per place. [2024-06-20 15:19:46,394 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 126 selfloop transitions, 27 changer transitions 0/161 dead transitions. [2024-06-20 15:19:46,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 161 transitions, 1636 flow [2024-06-20 15:19:46,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:46,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:19:46,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:19:46,396 INFO L175 Difference]: Start difference. First operand has 114 places, 132 transitions, 1248 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:19:46,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 161 transitions, 1636 flow [2024-06-20 15:19:46,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 161 transitions, 1540 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:46,426 INFO L231 Difference]: Finished difference. Result has 116 places, 134 transitions, 1231 flow [2024-06-20 15:19:46,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=116, PETRI_TRANSITIONS=134} [2024-06-20 15:19:46,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-20 15:19:46,426 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 134 transitions, 1231 flow [2024-06-20 15:19:46,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:46,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:46,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:46,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:19:46,427 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:46,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 390237973, now seen corresponding path program 4 times [2024-06-20 15:19:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:46,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403269505] [2024-06-20 15:19:46,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:46,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:46,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:46,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:46,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:46,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403269505] [2024-06-20 15:19:46,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403269505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:46,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:46,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:46,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355794983] [2024-06-20 15:19:46,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:46,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:46,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:46,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:46,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:46,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:46,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 134 transitions, 1231 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:46,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:46,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:46,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:46,767 INFO L124 PetriNetUnfolderBase]: 1074/1777 cut-off events. [2024-06-20 15:19:46,767 INFO L125 PetriNetUnfolderBase]: For 25678/25678 co-relation queries the response was YES. [2024-06-20 15:19:46,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9966 conditions, 1777 events. 1074/1777 cut-off events. For 25678/25678 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9250 event pairs, 307 based on Foata normal form. 2/1771 useless extension candidates. Maximal degree in co-relation 9913. Up to 1444 conditions per place. [2024-06-20 15:19:46,780 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 113 selfloop transitions, 47 changer transitions 0/168 dead transitions. [2024-06-20 15:19:46,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 168 transitions, 1840 flow [2024-06-20 15:19:46,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:19:46,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:19:46,781 INFO L175 Difference]: Start difference. First operand has 116 places, 134 transitions, 1231 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:19:46,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 168 transitions, 1840 flow [2024-06-20 15:19:46,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 168 transitions, 1779 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:46,808 INFO L231 Difference]: Finished difference. Result has 119 places, 141 transitions, 1360 flow [2024-06-20 15:19:46,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1170, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1360, PETRI_PLACES=119, PETRI_TRANSITIONS=141} [2024-06-20 15:19:46,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 15:19:46,809 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 141 transitions, 1360 flow [2024-06-20 15:19:46,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:46,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:46,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:46,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:19:46,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:46,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1225809913, now seen corresponding path program 5 times [2024-06-20 15:19:46,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:46,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139736865] [2024-06-20 15:19:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:46,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:46,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139736865] [2024-06-20 15:19:46,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139736865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:46,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:46,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:46,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595409478] [2024-06-20 15:19:46,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:46,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:46,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:46,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:46,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:46,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:46,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 141 transitions, 1360 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:46,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:46,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:46,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:47,144 INFO L124 PetriNetUnfolderBase]: 1069/1770 cut-off events. [2024-06-20 15:19:47,145 INFO L125 PetriNetUnfolderBase]: For 27722/27722 co-relation queries the response was YES. [2024-06-20 15:19:47,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10106 conditions, 1770 events. 1069/1770 cut-off events. For 27722/27722 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 9170 event pairs, 307 based on Foata normal form. 2/1764 useless extension candidates. Maximal degree in co-relation 10051. Up to 1439 conditions per place. [2024-06-20 15:19:47,159 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 108 selfloop transitions, 51 changer transitions 0/167 dead transitions. [2024-06-20 15:19:47,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 167 transitions, 1832 flow [2024-06-20 15:19:47,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:47,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:19:47,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:19:47,160 INFO L175 Difference]: Start difference. First operand has 119 places, 141 transitions, 1360 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:19:47,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 167 transitions, 1832 flow [2024-06-20 15:19:47,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 167 transitions, 1680 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:47,198 INFO L231 Difference]: Finished difference. Result has 121 places, 142 transitions, 1332 flow [2024-06-20 15:19:47,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1332, PETRI_PLACES=121, PETRI_TRANSITIONS=142} [2024-06-20 15:19:47,198 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-20 15:19:47,198 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 142 transitions, 1332 flow [2024-06-20 15:19:47,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:47,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:47,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:47,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:19:47,199 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:47,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:47,199 INFO L85 PathProgramCache]: Analyzing trace with hash -210790055, now seen corresponding path program 6 times [2024-06-20 15:19:47,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:47,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341386672] [2024-06-20 15:19:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:47,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:47,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:47,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341386672] [2024-06-20 15:19:47,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341386672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:47,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:47,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:47,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991447828] [2024-06-20 15:19:47,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:47,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:47,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:47,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:47,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:47,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:47,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 142 transitions, 1332 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:47,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:47,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:47,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:47,558 INFO L124 PetriNetUnfolderBase]: 1064/1763 cut-off events. [2024-06-20 15:19:47,558 INFO L125 PetriNetUnfolderBase]: For 29136/29136 co-relation queries the response was YES. [2024-06-20 15:19:47,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10039 conditions, 1763 events. 1064/1763 cut-off events. For 29136/29136 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 9146 event pairs, 307 based on Foata normal form. 2/1757 useless extension candidates. Maximal degree in co-relation 9984. Up to 1434 conditions per place. [2024-06-20 15:19:47,571 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 108 selfloop transitions, 49 changer transitions 0/165 dead transitions. [2024-06-20 15:19:47,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 165 transitions, 1704 flow [2024-06-20 15:19:47,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:47,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:47,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:19:47,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:19:47,572 INFO L175 Difference]: Start difference. First operand has 121 places, 142 transitions, 1332 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:19:47,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 165 transitions, 1704 flow [2024-06-20 15:19:47,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 165 transitions, 1608 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:47,602 INFO L231 Difference]: Finished difference. Result has 124 places, 142 transitions, 1342 flow [2024-06-20 15:19:47,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1342, PETRI_PLACES=124, PETRI_TRANSITIONS=142} [2024-06-20 15:19:47,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 82 predicate places. [2024-06-20 15:19:47,603 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 142 transitions, 1342 flow [2024-06-20 15:19:47,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:47,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:47,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:47,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:19:47,604 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:47,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:47,604 INFO L85 PathProgramCache]: Analyzing trace with hash 482416039, now seen corresponding path program 2 times [2024-06-20 15:19:47,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:47,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336625679] [2024-06-20 15:19:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:47,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:47,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:47,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336625679] [2024-06-20 15:19:47,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336625679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:47,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:47,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:47,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140526447] [2024-06-20 15:19:47,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:47,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:47,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:47,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:47,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:47,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:47,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 142 transitions, 1342 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:47,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:47,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:47,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:47,956 INFO L124 PetriNetUnfolderBase]: 1081/1795 cut-off events. [2024-06-20 15:19:47,956 INFO L125 PetriNetUnfolderBase]: For 32063/32063 co-relation queries the response was YES. [2024-06-20 15:19:47,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10250 conditions, 1795 events. 1081/1795 cut-off events. For 32063/32063 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 9340 event pairs, 300 based on Foata normal form. 4/1794 useless extension candidates. Maximal degree in co-relation 10194. Up to 1539 conditions per place. [2024-06-20 15:19:47,970 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 133 selfloop transitions, 27 changer transitions 0/168 dead transitions. [2024-06-20 15:19:47,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 168 transitions, 1740 flow [2024-06-20 15:19:47,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:19:47,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:19:47,972 INFO L175 Difference]: Start difference. First operand has 124 places, 142 transitions, 1342 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:19:47,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 168 transitions, 1740 flow [2024-06-20 15:19:48,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 168 transitions, 1644 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:48,010 INFO L231 Difference]: Finished difference. Result has 126 places, 144 transitions, 1329 flow [2024-06-20 15:19:48,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1246, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1329, PETRI_PLACES=126, PETRI_TRANSITIONS=144} [2024-06-20 15:19:48,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-20 15:19:48,011 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 144 transitions, 1329 flow [2024-06-20 15:19:48,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:48,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:48,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:48,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:19:48,012 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:48,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash 738916549, now seen corresponding path program 3 times [2024-06-20 15:19:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:48,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355088995] [2024-06-20 15:19:48,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:48,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:48,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:48,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:48,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355088995] [2024-06-20 15:19:48,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355088995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:48,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:48,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:48,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546987803] [2024-06-20 15:19:48,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:48,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:48,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:48,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:48,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 144 transitions, 1329 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:48,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:48,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:48,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:48,368 INFO L124 PetriNetUnfolderBase]: 1098/1827 cut-off events. [2024-06-20 15:19:48,368 INFO L125 PetriNetUnfolderBase]: For 34674/34674 co-relation queries the response was YES. [2024-06-20 15:19:48,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10528 conditions, 1827 events. 1098/1827 cut-off events. For 34674/34674 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9560 event pairs, 305 based on Foata normal form. 4/1826 useless extension candidates. Maximal degree in co-relation 10471. Up to 1566 conditions per place. [2024-06-20 15:19:48,385 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 134 selfloop transitions, 28 changer transitions 0/170 dead transitions. [2024-06-20 15:19:48,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 170 transitions, 1735 flow [2024-06-20 15:19:48,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:48,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:48,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:19:48,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:19:48,387 INFO L175 Difference]: Start difference. First operand has 126 places, 144 transitions, 1329 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:19:48,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 170 transitions, 1735 flow [2024-06-20 15:19:48,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 170 transitions, 1670 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:48,423 INFO L231 Difference]: Finished difference. Result has 128 places, 146 transitions, 1353 flow [2024-06-20 15:19:48,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1353, PETRI_PLACES=128, PETRI_TRANSITIONS=146} [2024-06-20 15:19:48,424 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-20 15:19:48,424 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 146 transitions, 1353 flow [2024-06-20 15:19:48,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:48,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:48,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:48,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:19:48,425 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:48,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:48,425 INFO L85 PathProgramCache]: Analyzing trace with hash 55448981, now seen corresponding path program 4 times [2024-06-20 15:19:48,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:48,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624826833] [2024-06-20 15:19:48,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:48,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:48,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:48,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624826833] [2024-06-20 15:19:48,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624826833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:48,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:48,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:48,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115927661] [2024-06-20 15:19:48,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:48,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:48,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:48,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:48,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:48,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:48,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 146 transitions, 1353 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:48,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:48,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:48,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:48,778 INFO L124 PetriNetUnfolderBase]: 1090/1814 cut-off events. [2024-06-20 15:19:48,778 INFO L125 PetriNetUnfolderBase]: For 36952/36952 co-relation queries the response was YES. [2024-06-20 15:19:48,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10571 conditions, 1814 events. 1090/1814 cut-off events. For 36952/36952 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9521 event pairs, 274 based on Foata normal form. 4/1813 useless extension candidates. Maximal degree in co-relation 10513. Up to 1477 conditions per place. [2024-06-20 15:19:48,792 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 130 selfloop transitions, 35 changer transitions 0/173 dead transitions. [2024-06-20 15:19:48,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 173 transitions, 1771 flow [2024-06-20 15:19:48,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:48,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:19:48,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:19:48,793 INFO L175 Difference]: Start difference. First operand has 128 places, 146 transitions, 1353 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:19:48,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 173 transitions, 1771 flow [2024-06-20 15:19:48,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 173 transitions, 1700 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:48,828 INFO L231 Difference]: Finished difference. Result has 130 places, 148 transitions, 1389 flow [2024-06-20 15:19:48,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1282, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1389, PETRI_PLACES=130, PETRI_TRANSITIONS=148} [2024-06-20 15:19:48,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-20 15:19:48,829 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 148 transitions, 1389 flow [2024-06-20 15:19:48,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:48,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:48,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:48,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:19:48,829 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:48,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:48,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1358205659, now seen corresponding path program 1 times [2024-06-20 15:19:48,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:48,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693338517] [2024-06-20 15:19:48,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:48,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:48,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:48,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:48,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693338517] [2024-06-20 15:19:48,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693338517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:48,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:48,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:48,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604608083] [2024-06-20 15:19:48,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:48,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:48,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:48,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:48,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:48,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:48,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 148 transitions, 1389 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:48,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:48,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:48,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:49,244 INFO L124 PetriNetUnfolderBase]: 1169/1956 cut-off events. [2024-06-20 15:19:49,245 INFO L125 PetriNetUnfolderBase]: For 50770/50810 co-relation queries the response was YES. [2024-06-20 15:19:49,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11898 conditions, 1956 events. 1169/1956 cut-off events. For 50770/50810 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10521 event pairs, 188 based on Foata normal form. 18/1922 useless extension candidates. Maximal degree in co-relation 11839. Up to 1444 conditions per place. [2024-06-20 15:19:49,259 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 127 selfloop transitions, 35 changer transitions 0/195 dead transitions. [2024-06-20 15:19:49,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 195 transitions, 2003 flow [2024-06-20 15:19:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:49,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:49,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-20 15:19:49,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-20 15:19:49,261 INFO L175 Difference]: Start difference. First operand has 130 places, 148 transitions, 1389 flow. Second operand 8 states and 218 transitions. [2024-06-20 15:19:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 195 transitions, 2003 flow [2024-06-20 15:19:49,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 195 transitions, 1914 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:49,342 INFO L231 Difference]: Finished difference. Result has 133 places, 152 transitions, 1433 flow [2024-06-20 15:19:49,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1300, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1433, PETRI_PLACES=133, PETRI_TRANSITIONS=152} [2024-06-20 15:19:49,343 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 91 predicate places. [2024-06-20 15:19:49,343 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 152 transitions, 1433 flow [2024-06-20 15:19:49,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:49,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:49,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:49,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:19:49,344 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:49,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:49,344 INFO L85 PathProgramCache]: Analyzing trace with hash 687561159, now seen corresponding path program 2 times [2024-06-20 15:19:49,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:49,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684128290] [2024-06-20 15:19:49,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:49,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:49,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:49,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:49,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684128290] [2024-06-20 15:19:49,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684128290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:49,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:49,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:49,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140283340] [2024-06-20 15:19:49,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:49,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:49,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:49,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:49,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:49,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:49,508 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 152 transitions, 1433 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:49,508 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:49,508 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:49,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:49,768 INFO L124 PetriNetUnfolderBase]: 1139/1910 cut-off events. [2024-06-20 15:19:49,769 INFO L125 PetriNetUnfolderBase]: For 50367/50406 co-relation queries the response was YES. [2024-06-20 15:19:49,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11612 conditions, 1910 events. 1139/1910 cut-off events. For 50367/50406 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10293 event pairs, 263 based on Foata normal form. 16/1873 useless extension candidates. Maximal degree in co-relation 11552. Up to 1560 conditions per place. [2024-06-20 15:19:49,783 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 121 selfloop transitions, 31 changer transitions 0/185 dead transitions. [2024-06-20 15:19:49,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 185 transitions, 1837 flow [2024-06-20 15:19:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:49,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-20 15:19:49,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2024-06-20 15:19:49,784 INFO L175 Difference]: Start difference. First operand has 133 places, 152 transitions, 1433 flow. Second operand 7 states and 189 transitions. [2024-06-20 15:19:49,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 185 transitions, 1837 flow [2024-06-20 15:19:49,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 185 transitions, 1781 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:49,826 INFO L231 Difference]: Finished difference. Result has 136 places, 152 transitions, 1448 flow [2024-06-20 15:19:49,826 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1377, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1448, PETRI_PLACES=136, PETRI_TRANSITIONS=152} [2024-06-20 15:19:49,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 15:19:49,827 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 152 transitions, 1448 flow [2024-06-20 15:19:49,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:49,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:49,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:49,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:19:49,828 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:49,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:49,828 INFO L85 PathProgramCache]: Analyzing trace with hash 330942841, now seen corresponding path program 3 times [2024-06-20 15:19:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:49,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927695402] [2024-06-20 15:19:49,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:49,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:49,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:49,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:49,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927695402] [2024-06-20 15:19:49,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927695402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:49,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:49,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:49,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719622083] [2024-06-20 15:19:49,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:49,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:49,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:49,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:49,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:50,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:50,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 152 transitions, 1448 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:50,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:50,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:50,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:50,274 INFO L124 PetriNetUnfolderBase]: 1186/1983 cut-off events. [2024-06-20 15:19:50,274 INFO L125 PetriNetUnfolderBase]: For 54695/54728 co-relation queries the response was YES. [2024-06-20 15:19:50,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12146 conditions, 1983 events. 1186/1983 cut-off events. For 54695/54728 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10744 event pairs, 271 based on Foata normal form. 14/1936 useless extension candidates. Maximal degree in co-relation 12084. Up to 1536 conditions per place. [2024-06-20 15:19:50,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 57 changer transitions 0/185 dead transitions. [2024-06-20 15:19:50,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 185 transitions, 1930 flow [2024-06-20 15:19:50,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:50,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-20 15:19:50,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6655052264808362 [2024-06-20 15:19:50,292 INFO L175 Difference]: Start difference. First operand has 136 places, 152 transitions, 1448 flow. Second operand 7 states and 191 transitions. [2024-06-20 15:19:50,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 185 transitions, 1930 flow [2024-06-20 15:19:50,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 185 transitions, 1861 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:50,343 INFO L231 Difference]: Finished difference. Result has 137 places, 154 transitions, 1536 flow [2024-06-20 15:19:50,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1379, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1536, PETRI_PLACES=137, PETRI_TRANSITIONS=154} [2024-06-20 15:19:50,347 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-20 15:19:50,347 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 154 transitions, 1536 flow [2024-06-20 15:19:50,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:50,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:50,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:50,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:19:50,348 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:50,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:50,348 INFO L85 PathProgramCache]: Analyzing trace with hash -793957989, now seen corresponding path program 4 times [2024-06-20 15:19:50,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:50,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280105033] [2024-06-20 15:19:50,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:50,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:50,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:50,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280105033] [2024-06-20 15:19:50,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280105033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:50,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:50,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:19:50,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743192073] [2024-06-20 15:19:50,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:50,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:19:50,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:50,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:19:50,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:19:50,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:50,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 154 transitions, 1536 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:50,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:50,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:50,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:50,789 INFO L124 PetriNetUnfolderBase]: 1214/2023 cut-off events. [2024-06-20 15:19:50,789 INFO L125 PetriNetUnfolderBase]: For 56970/57003 co-relation queries the response was YES. [2024-06-20 15:19:50,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12565 conditions, 2023 events. 1214/2023 cut-off events. For 56970/57003 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11046 event pairs, 281 based on Foata normal form. 14/1973 useless extension candidates. Maximal degree in co-relation 12502. Up to 1570 conditions per place. [2024-06-20 15:19:50,805 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 98 selfloop transitions, 53 changer transitions 0/184 dead transitions. [2024-06-20 15:19:50,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 184 transitions, 2014 flow [2024-06-20 15:19:50,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:19:50,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:19:50,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:19:50,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-20 15:19:50,807 INFO L175 Difference]: Start difference. First operand has 137 places, 154 transitions, 1536 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:19:50,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 184 transitions, 2014 flow [2024-06-20 15:19:50,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 184 transitions, 1891 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:50,852 INFO L231 Difference]: Finished difference. Result has 139 places, 156 transitions, 1566 flow [2024-06-20 15:19:50,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1566, PETRI_PLACES=139, PETRI_TRANSITIONS=156} [2024-06-20 15:19:50,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 97 predicate places. [2024-06-20 15:19:50,853 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 156 transitions, 1566 flow [2024-06-20 15:19:50,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:50,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:50,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:50,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:19:50,854 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)] === [2024-06-20 15:19:50,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:50,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1251514325, now seen corresponding path program 1 times [2024-06-20 15:19:50,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:50,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283392180] [2024-06-20 15:19:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:50,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:50,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:50,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283392180] [2024-06-20 15:19:50,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283392180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:50,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:50,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:50,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645408499] [2024-06-20 15:19:50,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:50,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:50,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:50,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:50,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:50,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:50,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 156 transitions, 1566 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:50,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:50,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:50,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:51,207 INFO L124 PetriNetUnfolderBase]: 1279/2135 cut-off events. [2024-06-20 15:19:51,207 INFO L125 PetriNetUnfolderBase]: For 50409/50409 co-relation queries the response was YES. [2024-06-20 15:19:51,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12954 conditions, 2135 events. 1279/2135 cut-off events. For 50409/50409 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11580 event pairs, 301 based on Foata normal form. 1/2134 useless extension candidates. Maximal degree in co-relation 12890. Up to 1916 conditions per place. [2024-06-20 15:19:51,223 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 151 selfloop transitions, 20 changer transitions 0/179 dead transitions. [2024-06-20 15:19:51,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 179 transitions, 2100 flow [2024-06-20 15:19:51,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:51,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:51,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:19:51,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:19:51,225 INFO L175 Difference]: Start difference. First operand has 139 places, 156 transitions, 1566 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:19:51,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 179 transitions, 2100 flow [2024-06-20 15:19:51,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 179 transitions, 1981 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-20 15:19:51,280 INFO L231 Difference]: Finished difference. Result has 140 places, 162 transitions, 1591 flow [2024-06-20 15:19:51,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1447, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1591, PETRI_PLACES=140, PETRI_TRANSITIONS=162} [2024-06-20 15:19:51,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-20 15:19:51,280 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 162 transitions, 1591 flow [2024-06-20 15:19:51,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:51,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:51,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:51,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:19:51,281 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:51,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:51,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1251394355, now seen corresponding path program 2 times [2024-06-20 15:19:51,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:51,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591914612] [2024-06-20 15:19:51,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:51,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:51,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:51,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:51,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591914612] [2024-06-20 15:19:51,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591914612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:51,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:51,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:51,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476056858] [2024-06-20 15:19:51,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:51,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:51,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:51,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:51,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:51,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:51,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 162 transitions, 1591 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:51,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:51,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:51,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:51,661 INFO L124 PetriNetUnfolderBase]: 1289/2151 cut-off events. [2024-06-20 15:19:51,661 INFO L125 PetriNetUnfolderBase]: For 52872/52872 co-relation queries the response was YES. [2024-06-20 15:19:51,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13017 conditions, 2151 events. 1289/2151 cut-off events. For 52872/52872 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11665 event pairs, 301 based on Foata normal form. 1/2150 useless extension candidates. Maximal degree in co-relation 12952. Up to 1942 conditions per place. [2024-06-20 15:19:51,677 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 155 selfloop transitions, 18 changer transitions 0/181 dead transitions. [2024-06-20 15:19:51,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 181 transitions, 2057 flow [2024-06-20 15:19:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:51,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:51,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-20 15:19:51,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:19:51,679 INFO L175 Difference]: Start difference. First operand has 140 places, 162 transitions, 1591 flow. Second operand 6 states and 141 transitions. [2024-06-20 15:19:51,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 181 transitions, 2057 flow [2024-06-20 15:19:51,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 181 transitions, 1981 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-20 15:19:51,733 INFO L231 Difference]: Finished difference. Result has 144 places, 168 transitions, 1651 flow [2024-06-20 15:19:51,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1651, PETRI_PLACES=144, PETRI_TRANSITIONS=168} [2024-06-20 15:19:51,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-20 15:19:51,734 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 168 transitions, 1651 flow [2024-06-20 15:19:51,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:51,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:51,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:51,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:19:51,734 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:51,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:51,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1155580831, now seen corresponding path program 1 times [2024-06-20 15:19:51,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:51,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605635753] [2024-06-20 15:19:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:51,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:51,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:51,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:51,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605635753] [2024-06-20 15:19:51,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605635753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:51,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:51,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:51,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888310592] [2024-06-20 15:19:51,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:51,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:51,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:51,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:51,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:51,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:51,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 168 transitions, 1651 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:51,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:51,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:51,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:52,209 INFO L124 PetriNetUnfolderBase]: 1314/2187 cut-off events. [2024-06-20 15:19:52,210 INFO L125 PetriNetUnfolderBase]: For 56403/56403 co-relation queries the response was YES. [2024-06-20 15:19:52,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13289 conditions, 2187 events. 1314/2187 cut-off events. For 56403/56403 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11909 event pairs, 310 based on Foata normal form. 2/2184 useless extension candidates. Maximal degree in co-relation 13222. Up to 1887 conditions per place. [2024-06-20 15:19:52,226 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 42 changer transitions 0/193 dead transitions. [2024-06-20 15:19:52,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 193 transitions, 2217 flow [2024-06-20 15:19:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:19:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:19:52,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:19:52,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:19:52,228 INFO L175 Difference]: Start difference. First operand has 144 places, 168 transitions, 1651 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:19:52,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 193 transitions, 2217 flow [2024-06-20 15:19:52,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 193 transitions, 2153 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:52,296 INFO L231 Difference]: Finished difference. Result has 148 places, 179 transitions, 1799 flow [2024-06-20 15:19:52,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1799, PETRI_PLACES=148, PETRI_TRANSITIONS=179} [2024-06-20 15:19:52,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-20 15:19:52,297 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 179 transitions, 1799 flow [2024-06-20 15:19:52,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:52,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:52,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:52,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:19:52,298 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:52,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:52,298 INFO L85 PathProgramCache]: Analyzing trace with hash 245960603, now seen corresponding path program 3 times [2024-06-20 15:19:52,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:52,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352220504] [2024-06-20 15:19:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:52,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:52,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:52,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:52,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352220504] [2024-06-20 15:19:52,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352220504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:52,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:52,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:52,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004786429] [2024-06-20 15:19:52,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:52,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:52,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:52,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:52,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:52,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:52,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 179 transitions, 1799 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:52,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:52,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:52,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:52,741 INFO L124 PetriNetUnfolderBase]: 1311/2186 cut-off events. [2024-06-20 15:19:52,741 INFO L125 PetriNetUnfolderBase]: For 58251/58251 co-relation queries the response was YES. [2024-06-20 15:19:52,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13435 conditions, 2186 events. 1311/2186 cut-off events. For 58251/58251 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11882 event pairs, 299 based on Foata normal form. 1/2185 useless extension candidates. Maximal degree in co-relation 13366. Up to 1961 conditions per place. [2024-06-20 15:19:52,760 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 163 selfloop transitions, 23 changer transitions 0/194 dead transitions. [2024-06-20 15:19:52,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 194 transitions, 2209 flow [2024-06-20 15:19:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:19:52,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:19:52,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-20 15:19:52,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-20 15:19:52,763 INFO L175 Difference]: Start difference. First operand has 148 places, 179 transitions, 1799 flow. Second operand 5 states and 126 transitions. [2024-06-20 15:19:52,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 194 transitions, 2209 flow [2024-06-20 15:19:52,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 194 transitions, 2130 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-20 15:19:52,825 INFO L231 Difference]: Finished difference. Result has 151 places, 179 transitions, 1780 flow [2024-06-20 15:19:52,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1780, PETRI_PLACES=151, PETRI_TRANSITIONS=179} [2024-06-20 15:19:52,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 15:19:52,825 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 179 transitions, 1780 flow [2024-06-20 15:19:52,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:52,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:52,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:52,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:19:52,826 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:52,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:52,827 INFO L85 PathProgramCache]: Analyzing trace with hash 208661279, now seen corresponding path program 2 times [2024-06-20 15:19:52,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:52,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796377748] [2024-06-20 15:19:52,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:52,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:52,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:52,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:52,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796377748] [2024-06-20 15:19:52,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796377748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:52,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:52,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:52,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839575699] [2024-06-20 15:19:52,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:52,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:52,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:52,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:52,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 179 transitions, 1780 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:52,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:52,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:52,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:53,193 INFO L124 PetriNetUnfolderBase]: 1321/2200 cut-off events. [2024-06-20 15:19:53,193 INFO L125 PetriNetUnfolderBase]: For 62806/62809 co-relation queries the response was YES. [2024-06-20 15:19:53,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13536 conditions, 2200 events. 1321/2200 cut-off events. For 62806/62809 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11980 event pairs, 329 based on Foata normal form. 4/2197 useless extension candidates. Maximal degree in co-relation 13466. Up to 1893 conditions per place. [2024-06-20 15:19:53,210 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 139 selfloop transitions, 46 changer transitions 0/193 dead transitions. [2024-06-20 15:19:53,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 193 transitions, 2286 flow [2024-06-20 15:19:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:19:53,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:19:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-20 15:19:53,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:19:53,212 INFO L175 Difference]: Start difference. First operand has 151 places, 179 transitions, 1780 flow. Second operand 5 states and 125 transitions. [2024-06-20 15:19:53,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 193 transitions, 2286 flow [2024-06-20 15:19:53,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 193 transitions, 2236 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:53,279 INFO L231 Difference]: Finished difference. Result has 152 places, 183 transitions, 1877 flow [2024-06-20 15:19:53,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1732, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1877, PETRI_PLACES=152, PETRI_TRANSITIONS=183} [2024-06-20 15:19:53,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-20 15:19:53,279 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 183 transitions, 1877 flow [2024-06-20 15:19:53,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:53,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:53,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:53,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:19:53,280 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:53,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:53,280 INFO L85 PathProgramCache]: Analyzing trace with hash 126910471, now seen corresponding path program 3 times [2024-06-20 15:19:53,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:53,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080513536] [2024-06-20 15:19:53,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:53,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:53,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:53,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080513536] [2024-06-20 15:19:53,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080513536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:53,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:53,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:53,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445368514] [2024-06-20 15:19:53,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:53,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:53,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:53,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:53,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 183 transitions, 1877 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:53,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:53,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:53,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:53,630 INFO L124 PetriNetUnfolderBase]: 1301/2165 cut-off events. [2024-06-20 15:19:53,630 INFO L125 PetriNetUnfolderBase]: For 60836/60836 co-relation queries the response was YES. [2024-06-20 15:19:53,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13399 conditions, 2165 events. 1301/2165 cut-off events. For 60836/60836 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11748 event pairs, 308 based on Foata normal form. 2/2162 useless extension candidates. Maximal degree in co-relation 13328. Up to 1864 conditions per place. [2024-06-20 15:19:53,647 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 46 changer transitions 0/195 dead transitions. [2024-06-20 15:19:53,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 195 transitions, 2281 flow [2024-06-20 15:19:53,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:19:53,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:19:53,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-20 15:19:53,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-20 15:19:53,649 INFO L175 Difference]: Start difference. First operand has 152 places, 183 transitions, 1877 flow. Second operand 5 states and 127 transitions. [2024-06-20 15:19:53,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 195 transitions, 2281 flow [2024-06-20 15:19:53,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 2167 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:53,723 INFO L231 Difference]: Finished difference. Result has 154 places, 183 transitions, 1871 flow [2024-06-20 15:19:53,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1763, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1871, PETRI_PLACES=154, PETRI_TRANSITIONS=183} [2024-06-20 15:19:53,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-20 15:19:53,723 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 183 transitions, 1871 flow [2024-06-20 15:19:53,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:53,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:53,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:53,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:19:53,724 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:53,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:53,724 INFO L85 PathProgramCache]: Analyzing trace with hash 208670207, now seen corresponding path program 1 times [2024-06-20 15:19:53,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:53,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672433378] [2024-06-20 15:19:53,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:53,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:53,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:53,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672433378] [2024-06-20 15:19:53,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672433378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:53,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:53,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:19:53,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411033363] [2024-06-20 15:19:53,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:53,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:19:53,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:53,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:19:53,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:19:53,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:19:53,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 183 transitions, 1871 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:53,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:53,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:19:53,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:54,145 INFO L124 PetriNetUnfolderBase]: 1263/2117 cut-off events. [2024-06-20 15:19:54,145 INFO L125 PetriNetUnfolderBase]: For 67652/67666 co-relation queries the response was YES. [2024-06-20 15:19:54,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13183 conditions, 2117 events. 1263/2117 cut-off events. For 67652/67666 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11657 event pairs, 312 based on Foata normal form. 24/2129 useless extension candidates. Maximal degree in co-relation 13112. Up to 1754 conditions per place. [2024-06-20 15:19:54,163 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 148 selfloop transitions, 22 changer transitions 0/198 dead transitions. [2024-06-20 15:19:54,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 198 transitions, 2283 flow [2024-06-20 15:19:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:19:54,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:19:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-20 15:19:54,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-20 15:19:54,165 INFO L175 Difference]: Start difference. First operand has 154 places, 183 transitions, 1871 flow. Second operand 5 states and 128 transitions. [2024-06-20 15:19:54,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 198 transitions, 2283 flow [2024-06-20 15:19:54,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 198 transitions, 2171 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:54,251 INFO L231 Difference]: Finished difference. Result has 155 places, 185 transitions, 1838 flow [2024-06-20 15:19:54,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1838, PETRI_PLACES=155, PETRI_TRANSITIONS=185} [2024-06-20 15:19:54,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-20 15:19:54,252 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 185 transitions, 1838 flow [2024-06-20 15:19:54,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:54,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:54,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:54,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:19:54,253 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:54,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:54,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1624697446, now seen corresponding path program 1 times [2024-06-20 15:19:54,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:54,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415704007] [2024-06-20 15:19:54,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:54,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:54,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:54,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:54,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415704007] [2024-06-20 15:19:54,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415704007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:54,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:54,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:54,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759493718] [2024-06-20 15:19:54,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:54,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:54,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:54,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:54,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:54,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:54,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 185 transitions, 1838 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:54,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:54,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:54,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:54,798 INFO L124 PetriNetUnfolderBase]: 1459/2432 cut-off events. [2024-06-20 15:19:54,798 INFO L125 PetriNetUnfolderBase]: For 75960/75960 co-relation queries the response was YES. [2024-06-20 15:19:54,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15066 conditions, 2432 events. 1459/2432 cut-off events. For 75960/75960 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13489 event pairs, 238 based on Foata normal form. 12/2442 useless extension candidates. Maximal degree in co-relation 14994. Up to 1912 conditions per place. [2024-06-20 15:19:54,817 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 210 selfloop transitions, 20 changer transitions 0/238 dead transitions. [2024-06-20 15:19:54,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 238 transitions, 2644 flow [2024-06-20 15:19:54,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:19:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:19:54,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 15:19:54,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-20 15:19:54,819 INFO L175 Difference]: Start difference. First operand has 155 places, 185 transitions, 1838 flow. Second operand 9 states and 226 transitions. [2024-06-20 15:19:54,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 238 transitions, 2644 flow [2024-06-20 15:19:54,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 238 transitions, 2587 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:19:54,888 INFO L231 Difference]: Finished difference. Result has 163 places, 190 transitions, 1909 flow [2024-06-20 15:19:54,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1909, PETRI_PLACES=163, PETRI_TRANSITIONS=190} [2024-06-20 15:19:54,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-20 15:19:54,889 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 190 transitions, 1909 flow [2024-06-20 15:19:54,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:54,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:54,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:54,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:19:54,889 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:54,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:54,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1550389402, now seen corresponding path program 2 times [2024-06-20 15:19:54,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:54,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287945200] [2024-06-20 15:19:54,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:54,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:54,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:55,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:55,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:55,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287945200] [2024-06-20 15:19:55,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287945200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:55,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:55,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:55,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249388810] [2024-06-20 15:19:55,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:55,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:55,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:55,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:55,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:55,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:55,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 190 transitions, 1909 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:55,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:55,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:55,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:55,436 INFO L124 PetriNetUnfolderBase]: 1500/2503 cut-off events. [2024-06-20 15:19:55,436 INFO L125 PetriNetUnfolderBase]: For 80344/80344 co-relation queries the response was YES. [2024-06-20 15:19:55,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15608 conditions, 2503 events. 1500/2503 cut-off events. For 80344/80344 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 13967 event pairs, 319 based on Foata normal form. 12/2513 useless extension candidates. Maximal degree in co-relation 15533. Up to 2046 conditions per place. [2024-06-20 15:19:55,454 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 209 selfloop transitions, 18 changer transitions 0/235 dead transitions. [2024-06-20 15:19:55,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 235 transitions, 2672 flow [2024-06-20 15:19:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:55,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:55,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:19:55,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:19:55,455 INFO L175 Difference]: Start difference. First operand has 163 places, 190 transitions, 1909 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:19:55,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 235 transitions, 2672 flow [2024-06-20 15:19:55,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 235 transitions, 2624 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:55,547 INFO L231 Difference]: Finished difference. Result has 168 places, 193 transitions, 1961 flow [2024-06-20 15:19:55,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1961, PETRI_PLACES=168, PETRI_TRANSITIONS=193} [2024-06-20 15:19:55,548 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-20 15:19:55,548 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 193 transitions, 1961 flow [2024-06-20 15:19:55,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:55,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:55,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:55,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:19:55,549 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:55,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:55,549 INFO L85 PathProgramCache]: Analyzing trace with hash -762433420, now seen corresponding path program 3 times [2024-06-20 15:19:55,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:55,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608126959] [2024-06-20 15:19:55,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:55,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:55,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:55,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:55,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:55,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608126959] [2024-06-20 15:19:55,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608126959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:55,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:55,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:55,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904782928] [2024-06-20 15:19:55,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:55,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:55,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:55,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:55,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:55,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:55,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 193 transitions, 1961 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:55,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:55,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:55,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:56,096 INFO L124 PetriNetUnfolderBase]: 1472/2459 cut-off events. [2024-06-20 15:19:56,097 INFO L125 PetriNetUnfolderBase]: For 79047/79047 co-relation queries the response was YES. [2024-06-20 15:19:56,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15030 conditions, 2459 events. 1472/2459 cut-off events. For 79047/79047 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 13659 event pairs, 320 based on Foata normal form. 16/2473 useless extension candidates. Maximal degree in co-relation 14952. Up to 2125 conditions per place. [2024-06-20 15:19:56,117 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 17 changer transitions 0/231 dead transitions. [2024-06-20 15:19:56,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 231 transitions, 2541 flow [2024-06-20 15:19:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:56,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:19:56,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:19:56,118 INFO L175 Difference]: Start difference. First operand has 168 places, 193 transitions, 1961 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:19:56,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 231 transitions, 2541 flow [2024-06-20 15:19:56,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 231 transitions, 2481 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:56,215 INFO L231 Difference]: Finished difference. Result has 172 places, 194 transitions, 1966 flow [2024-06-20 15:19:56,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1911, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1966, PETRI_PLACES=172, PETRI_TRANSITIONS=194} [2024-06-20 15:19:56,216 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-20 15:19:56,216 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 194 transitions, 1966 flow [2024-06-20 15:19:56,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:56,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:56,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:56,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:19:56,217 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:56,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:56,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2094764292, now seen corresponding path program 4 times [2024-06-20 15:19:56,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:56,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767246761] [2024-06-20 15:19:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:56,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:56,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767246761] [2024-06-20 15:19:56,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767246761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:56,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:56,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210972804] [2024-06-20 15:19:56,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:56,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:56,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:56,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:56,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:56,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:56,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 194 transitions, 1966 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:56,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:56,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:56,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:56,739 INFO L124 PetriNetUnfolderBase]: 1530/2567 cut-off events. [2024-06-20 15:19:56,740 INFO L125 PetriNetUnfolderBase]: For 82957/82960 co-relation queries the response was YES. [2024-06-20 15:19:56,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15474 conditions, 2567 events. 1530/2567 cut-off events. For 82957/82960 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 14545 event pairs, 345 based on Foata normal form. 16/2579 useless extension candidates. Maximal degree in co-relation 15394. Up to 2097 conditions per place. [2024-06-20 15:19:56,758 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 172 selfloop transitions, 49 changer transitions 0/229 dead transitions. [2024-06-20 15:19:56,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 229 transitions, 2530 flow [2024-06-20 15:19:56,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:19:56,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:19:56,759 INFO L175 Difference]: Start difference. First operand has 172 places, 194 transitions, 1966 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:19:56,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 229 transitions, 2530 flow [2024-06-20 15:19:56,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 229 transitions, 2499 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:56,884 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 2060 flow [2024-06-20 15:19:56,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2060, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-20 15:19:56,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-20 15:19:56,885 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 2060 flow [2024-06-20 15:19:56,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:56,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:56,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:56,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:19:56,886 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:56,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:56,886 INFO L85 PathProgramCache]: Analyzing trace with hash 234226744, now seen corresponding path program 5 times [2024-06-20 15:19:56,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:56,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208303372] [2024-06-20 15:19:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:56,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:56,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:56,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:56,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208303372] [2024-06-20 15:19:56,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208303372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:56,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:56,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:56,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555887774] [2024-06-20 15:19:56,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:56,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:56,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:56,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:56,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:57,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:57,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 2060 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:57,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:57,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:57,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:57,394 INFO L124 PetriNetUnfolderBase]: 1657/2790 cut-off events. [2024-06-20 15:19:57,394 INFO L125 PetriNetUnfolderBase]: For 96601/96604 co-relation queries the response was YES. [2024-06-20 15:19:57,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17284 conditions, 2790 events. 1657/2790 cut-off events. For 96601/96604 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16278 event pairs, 369 based on Foata normal form. 12/2798 useless extension candidates. Maximal degree in co-relation 17203. Up to 2095 conditions per place. [2024-06-20 15:19:57,418 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 51 changer transitions 0/237 dead transitions. [2024-06-20 15:19:57,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 237 transitions, 2832 flow [2024-06-20 15:19:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:57,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:57,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:19:57,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-20 15:19:57,420 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 2060 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:19:57,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 237 transitions, 2832 flow [2024-06-20 15:19:57,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 237 transitions, 2725 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:57,570 INFO L231 Difference]: Finished difference. Result has 177 places, 198 transitions, 2123 flow [2024-06-20 15:19:57,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1953, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2123, PETRI_PLACES=177, PETRI_TRANSITIONS=198} [2024-06-20 15:19:57,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-20 15:19:57,570 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 198 transitions, 2123 flow [2024-06-20 15:19:57,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:57,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:57,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:57,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:19:57,571 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:57,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:57,571 INFO L85 PathProgramCache]: Analyzing trace with hash 677873572, now seen corresponding path program 6 times [2024-06-20 15:19:57,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:57,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226618319] [2024-06-20 15:19:57,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:57,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:57,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:57,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:57,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226618319] [2024-06-20 15:19:57,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226618319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:57,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:57,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:57,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439287192] [2024-06-20 15:19:57,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:57,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:57,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:57,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:57,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:57,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:57,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 198 transitions, 2123 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:57,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:57,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:57,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:58,094 INFO L124 PetriNetUnfolderBase]: 1629/2746 cut-off events. [2024-06-20 15:19:58,094 INFO L125 PetriNetUnfolderBase]: For 93764/93767 co-relation queries the response was YES. [2024-06-20 15:19:58,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16681 conditions, 2746 events. 1629/2746 cut-off events. For 93764/93767 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 15971 event pairs, 370 based on Foata normal form. 16/2758 useless extension candidates. Maximal degree in co-relation 16598. Up to 2266 conditions per place. [2024-06-20 15:19:58,116 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-20 15:19:58,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 233 transitions, 2700 flow [2024-06-20 15:19:58,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:58,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:58,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:19:58,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:19:58,118 INFO L175 Difference]: Start difference. First operand has 177 places, 198 transitions, 2123 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:19:58,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 233 transitions, 2700 flow [2024-06-20 15:19:58,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 233 transitions, 2606 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 15:19:58,265 INFO L231 Difference]: Finished difference. Result has 181 places, 199 transitions, 2161 flow [2024-06-20 15:19:58,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2041, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2161, PETRI_PLACES=181, PETRI_TRANSITIONS=199} [2024-06-20 15:19:58,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-20 15:19:58,266 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 199 transitions, 2161 flow [2024-06-20 15:19:58,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:58,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:58,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:58,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:19:58,267 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:58,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1043442410, now seen corresponding path program 1 times [2024-06-20 15:19:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:58,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437820267] [2024-06-20 15:19:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:58,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:58,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:58,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437820267] [2024-06-20 15:19:58,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437820267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:58,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:58,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:58,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656578613] [2024-06-20 15:19:58,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:58,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:58,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:58,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:58,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:58,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:58,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 199 transitions, 2161 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:58,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:58,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:58,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:58,806 INFO L124 PetriNetUnfolderBase]: 1670/2817 cut-off events. [2024-06-20 15:19:58,807 INFO L125 PetriNetUnfolderBase]: For 94720/94723 co-relation queries the response was YES. [2024-06-20 15:19:58,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17078 conditions, 2817 events. 1670/2817 cut-off events. For 94720/94723 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 16542 event pairs, 361 based on Foata normal form. 12/2825 useless extension candidates. Maximal degree in co-relation 16993. Up to 2066 conditions per place. [2024-06-20 15:19:58,831 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 54 changer transitions 0/237 dead transitions. [2024-06-20 15:19:58,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 237 transitions, 2761 flow [2024-06-20 15:19:58,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:58,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:19:58,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:19:58,833 INFO L175 Difference]: Start difference. First operand has 181 places, 199 transitions, 2161 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:19:58,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 237 transitions, 2761 flow [2024-06-20 15:19:59,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 237 transitions, 2662 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:59,017 INFO L231 Difference]: Finished difference. Result has 183 places, 200 transitions, 2200 flow [2024-06-20 15:19:59,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2062, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2200, PETRI_PLACES=183, PETRI_TRANSITIONS=200} [2024-06-20 15:19:59,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-20 15:19:59,018 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 200 transitions, 2200 flow [2024-06-20 15:19:59,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:59,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:59,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:19:59,018 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:59,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:59,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1131597110, now seen corresponding path program 7 times [2024-06-20 15:19:59,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:59,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995963664] [2024-06-20 15:19:59,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:59,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:59,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:59,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:59,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:59,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995963664] [2024-06-20 15:19:59,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995963664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:59,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:59,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:59,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055792394] [2024-06-20 15:19:59,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:59,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:59,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:59,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:59,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:59,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:59,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 200 transitions, 2200 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:59,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:59,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:19:59,611 INFO L124 PetriNetUnfolderBase]: 1728/2915 cut-off events. [2024-06-20 15:19:59,612 INFO L125 PetriNetUnfolderBase]: For 103380/103380 co-relation queries the response was YES. [2024-06-20 15:19:59,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17752 conditions, 2915 events. 1728/2915 cut-off events. For 103380/103380 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17399 event pairs, 401 based on Foata normal form. 16/2923 useless extension candidates. Maximal degree in co-relation 17666. Up to 2435 conditions per place. [2024-06-20 15:19:59,642 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 49 changer transitions 0/232 dead transitions. [2024-06-20 15:19:59,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 232 transitions, 2768 flow [2024-06-20 15:19:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:19:59,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:19:59,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:19:59,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:19:59,644 INFO L175 Difference]: Start difference. First operand has 183 places, 200 transitions, 2200 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:19:59,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 232 transitions, 2768 flow [2024-06-20 15:19:59,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 232 transitions, 2644 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:19:59,831 INFO L231 Difference]: Finished difference. Result has 185 places, 201 transitions, 2207 flow [2024-06-20 15:19:59,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2076, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2207, PETRI_PLACES=185, PETRI_TRANSITIONS=201} [2024-06-20 15:19:59,832 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-20 15:19:59,832 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 201 transitions, 2207 flow [2024-06-20 15:19:59,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:19:59,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:19:59,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:19:59,833 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:19:59,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:19:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -705760712, now seen corresponding path program 8 times [2024-06-20 15:19:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:19:59,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375902965] [2024-06-20 15:19:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:19:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:19:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:19:59,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:19:59,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:19:59,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375902965] [2024-06-20 15:19:59,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375902965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:19:59,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:19:59,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:19:59,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668110120] [2024-06-20 15:19:59,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:19:59,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:19:59,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:19:59,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:19:59,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:19:59,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:19:59,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 201 transitions, 2207 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:19:59,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:19:59,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:19:59,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:00,405 INFO L124 PetriNetUnfolderBase]: 1786/3023 cut-off events. [2024-06-20 15:20:00,405 INFO L125 PetriNetUnfolderBase]: For 108397/108397 co-relation queries the response was YES. [2024-06-20 15:20:00,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18250 conditions, 3023 events. 1786/3023 cut-off events. For 108397/108397 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18211 event pairs, 416 based on Foata normal form. 16/3031 useless extension candidates. Maximal degree in co-relation 18163. Up to 2533 conditions per place. [2024-06-20 15:20:00,438 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 50 changer transitions 0/233 dead transitions. [2024-06-20 15:20:00,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 233 transitions, 2779 flow [2024-06-20 15:20:00,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:00,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:00,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:20:00,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:20:00,439 INFO L175 Difference]: Start difference. First operand has 185 places, 201 transitions, 2207 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:20:00,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 233 transitions, 2779 flow [2024-06-20 15:20:00,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 233 transitions, 2666 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:00,635 INFO L231 Difference]: Finished difference. Result has 187 places, 202 transitions, 2229 flow [2024-06-20 15:20:00,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2094, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2229, PETRI_PLACES=187, PETRI_TRANSITIONS=202} [2024-06-20 15:20:00,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-20 15:20:00,636 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 202 transitions, 2229 flow [2024-06-20 15:20:00,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:00,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:00,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:00,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:20:00,637 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:00,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash -705908582, now seen corresponding path program 9 times [2024-06-20 15:20:00,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:00,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514521061] [2024-06-20 15:20:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:00,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:00,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:00,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:00,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514521061] [2024-06-20 15:20:00,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514521061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:00,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:00,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:00,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740329342] [2024-06-20 15:20:00,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:00,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:00,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:00,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:00,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:00,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:00,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 202 transitions, 2229 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:00,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:00,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:00,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:01,234 INFO L124 PetriNetUnfolderBase]: 1888/3197 cut-off events. [2024-06-20 15:20:01,235 INFO L125 PetriNetUnfolderBase]: For 121198/121198 co-relation queries the response was YES. [2024-06-20 15:20:01,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19626 conditions, 3197 events. 1888/3197 cut-off events. For 121198/121198 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 19498 event pairs, 433 based on Foata normal form. 12/3201 useless extension candidates. Maximal degree in co-relation 19538. Up to 2400 conditions per place. [2024-06-20 15:20:01,260 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 53 changer transitions 0/241 dead transitions. [2024-06-20 15:20:01,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 241 transitions, 3037 flow [2024-06-20 15:20:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:20:01,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:20:01,261 INFO L175 Difference]: Start difference. First operand has 187 places, 202 transitions, 2229 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:20:01,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 241 transitions, 3037 flow [2024-06-20 15:20:01,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 241 transitions, 2920 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:01,459 INFO L231 Difference]: Finished difference. Result has 190 places, 205 transitions, 2305 flow [2024-06-20 15:20:01,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2305, PETRI_PLACES=190, PETRI_TRANSITIONS=205} [2024-06-20 15:20:01,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-20 15:20:01,460 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 205 transitions, 2305 flow [2024-06-20 15:20:01,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:01,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:01,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:01,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:20:01,460 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:01,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:01,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1177395316, now seen corresponding path program 10 times [2024-06-20 15:20:01,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:01,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497261871] [2024-06-20 15:20:01,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:01,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:01,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:01,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:01,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:01,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497261871] [2024-06-20 15:20:01,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497261871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:01,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:01,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:01,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097707776] [2024-06-20 15:20:01,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:01,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:01,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:01,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:01,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:01,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:01,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 205 transitions, 2305 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:01,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:01,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:01,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:02,014 INFO L124 PetriNetUnfolderBase]: 1860/3153 cut-off events. [2024-06-20 15:20:02,014 INFO L125 PetriNetUnfolderBase]: For 116081/116081 co-relation queries the response was YES. [2024-06-20 15:20:02,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18865 conditions, 3153 events. 1860/3153 cut-off events. For 116081/116081 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 19245 event pairs, 434 based on Foata normal form. 16/3161 useless extension candidates. Maximal degree in co-relation 18775. Up to 2663 conditions per place. [2024-06-20 15:20:02,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 52 changer transitions 0/237 dead transitions. [2024-06-20 15:20:02,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 237 transitions, 2890 flow [2024-06-20 15:20:02,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:02,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:20:02,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:20:02,046 INFO L175 Difference]: Start difference. First operand has 190 places, 205 transitions, 2305 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:20:02,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 237 transitions, 2890 flow [2024-06-20 15:20:02,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 237 transitions, 2774 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:02,292 INFO L231 Difference]: Finished difference. Result has 194 places, 206 transitions, 2333 flow [2024-06-20 15:20:02,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2333, PETRI_PLACES=194, PETRI_TRANSITIONS=206} [2024-06-20 15:20:02,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-20 15:20:02,293 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 206 transitions, 2333 flow [2024-06-20 15:20:02,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:02,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:02,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:02,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:20:02,294 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:02,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:02,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1433181206, now seen corresponding path program 2 times [2024-06-20 15:20:02,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:02,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252149097] [2024-06-20 15:20:02,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:02,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:02,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:02,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:02,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252149097] [2024-06-20 15:20:02,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252149097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:02,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:02,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:02,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852430003] [2024-06-20 15:20:02,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:02,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:02,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:02,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:02,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:02,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:02,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 206 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:02,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:02,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:02,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:02,893 INFO L124 PetriNetUnfolderBase]: 1901/3234 cut-off events. [2024-06-20 15:20:02,893 INFO L125 PetriNetUnfolderBase]: For 115672/115672 co-relation queries the response was YES. [2024-06-20 15:20:02,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19213 conditions, 3234 events. 1901/3234 cut-off events. For 115672/115672 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 19880 event pairs, 434 based on Foata normal form. 12/3238 useless extension candidates. Maximal degree in co-relation 19121. Up to 2647 conditions per place. [2024-06-20 15:20:02,918 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 54 changer transitions 0/241 dead transitions. [2024-06-20 15:20:02,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 241 transitions, 2941 flow [2024-06-20 15:20:02,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:02,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:02,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:20:02,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:20:02,919 INFO L175 Difference]: Start difference. First operand has 194 places, 206 transitions, 2333 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:20:02,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 241 transitions, 2941 flow [2024-06-20 15:20:03,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 241 transitions, 2836 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:03,136 INFO L231 Difference]: Finished difference. Result has 196 places, 207 transitions, 2374 flow [2024-06-20 15:20:03,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2374, PETRI_PLACES=196, PETRI_TRANSITIONS=207} [2024-06-20 15:20:03,137 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-20 15:20:03,137 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 207 transitions, 2374 flow [2024-06-20 15:20:03,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:03,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:03,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:03,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:20:03,138 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:03,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:03,138 INFO L85 PathProgramCache]: Analyzing trace with hash -254637242, now seen corresponding path program 3 times [2024-06-20 15:20:03,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:03,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410164051] [2024-06-20 15:20:03,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:03,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:03,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:03,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:03,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:03,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410164051] [2024-06-20 15:20:03,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410164051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:03,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:03,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:03,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495273312] [2024-06-20 15:20:03,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:03,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:03,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:03,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:03,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:03,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:03,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 207 transitions, 2374 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:03,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:03,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:03,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:03,708 INFO L124 PetriNetUnfolderBase]: 1942/3310 cut-off events. [2024-06-20 15:20:03,708 INFO L125 PetriNetUnfolderBase]: For 122325/122325 co-relation queries the response was YES. [2024-06-20 15:20:03,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19726 conditions, 3310 events. 1942/3310 cut-off events. For 122325/122325 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 20552 event pairs, 449 based on Foata normal form. 12/3314 useless extension candidates. Maximal degree in co-relation 19633. Up to 2626 conditions per place. [2024-06-20 15:20:03,741 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 182 selfloop transitions, 52 changer transitions 0/242 dead transitions. [2024-06-20 15:20:03,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 242 transitions, 2986 flow [2024-06-20 15:20:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:03,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:03,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:20:03,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:20:03,742 INFO L175 Difference]: Start difference. First operand has 196 places, 207 transitions, 2374 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:20:03,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 242 transitions, 2986 flow [2024-06-20 15:20:03,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 242 transitions, 2854 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:03,968 INFO L231 Difference]: Finished difference. Result has 198 places, 208 transitions, 2386 flow [2024-06-20 15:20:03,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2242, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2386, PETRI_PLACES=198, PETRI_TRANSITIONS=208} [2024-06-20 15:20:03,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-20 15:20:03,969 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 208 transitions, 2386 flow [2024-06-20 15:20:03,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:03,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:03,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:03,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:20:03,969 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:03,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:03,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1746880436, now seen corresponding path program 4 times [2024-06-20 15:20:03,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:03,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852377659] [2024-06-20 15:20:03,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:03,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:04,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:04,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:04,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852377659] [2024-06-20 15:20:04,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852377659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:04,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:04,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:04,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484391846] [2024-06-20 15:20:04,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:04,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:04,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:04,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:04,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:04,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:04,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 208 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:04,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:04,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:04,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:04,687 INFO L124 PetriNetUnfolderBase]: 1922/3288 cut-off events. [2024-06-20 15:20:04,690 INFO L125 PetriNetUnfolderBase]: For 114323/114323 co-relation queries the response was YES. [2024-06-20 15:20:04,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19008 conditions, 3288 events. 1922/3288 cut-off events. For 114323/114323 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 20364 event pairs, 394 based on Foata normal form. 12/3292 useless extension candidates. Maximal degree in co-relation 18914. Up to 1942 conditions per place. [2024-06-20 15:20:04,717 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 168 selfloop transitions, 66 changer transitions 0/242 dead transitions. [2024-06-20 15:20:04,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 242 transitions, 2884 flow [2024-06-20 15:20:04,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:04,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:20:04,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:20:04,725 INFO L175 Difference]: Start difference. First operand has 198 places, 208 transitions, 2386 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:20:04,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 242 transitions, 2884 flow [2024-06-20 15:20:04,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 242 transitions, 2754 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:04,977 INFO L231 Difference]: Finished difference. Result has 199 places, 207 transitions, 2308 flow [2024-06-20 15:20:04,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2308, PETRI_PLACES=199, PETRI_TRANSITIONS=207} [2024-06-20 15:20:04,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-20 15:20:04,978 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 207 transitions, 2308 flow [2024-06-20 15:20:04,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.5) internal successors, (132), 8 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:04,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:04,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:20:04,978 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:04,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash -568845454, now seen corresponding path program 1 times [2024-06-20 15:20:04,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:04,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392739023] [2024-06-20 15:20:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:04,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:05,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:05,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392739023] [2024-06-20 15:20:05,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392739023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:05,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:05,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:05,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293228143] [2024-06-20 15:20:05,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:05,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:05,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:05,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:05,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 207 transitions, 2308 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:05,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:05,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:05,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:05,565 INFO L124 PetriNetUnfolderBase]: 1950/3331 cut-off events. [2024-06-20 15:20:05,565 INFO L125 PetriNetUnfolderBase]: For 110743/110743 co-relation queries the response was YES. [2024-06-20 15:20:05,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19449 conditions, 3331 events. 1950/3331 cut-off events. For 110743/110743 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 20758 event pairs, 444 based on Foata normal form. 2/3328 useless extension candidates. Maximal degree in co-relation 19354. Up to 2854 conditions per place. [2024-06-20 15:20:05,599 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 167 selfloop transitions, 64 changer transitions 0/239 dead transitions. [2024-06-20 15:20:05,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 239 transitions, 3200 flow [2024-06-20 15:20:05,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:05,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:05,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:20:05,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:20:05,601 INFO L175 Difference]: Start difference. First operand has 199 places, 207 transitions, 2308 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:20:05,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 239 transitions, 3200 flow [2024-06-20 15:20:05,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 239 transitions, 2949 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 15:20:05,876 INFO L231 Difference]: Finished difference. Result has 198 places, 218 transitions, 2364 flow [2024-06-20 15:20:05,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2364, PETRI_PLACES=198, PETRI_TRANSITIONS=218} [2024-06-20 15:20:05,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-20 15:20:05,877 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 218 transitions, 2364 flow [2024-06-20 15:20:05,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:05,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:05,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:05,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:20:05,878 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:05,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:05,878 INFO L85 PathProgramCache]: Analyzing trace with hash -565126384, now seen corresponding path program 2 times [2024-06-20 15:20:05,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:05,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229726750] [2024-06-20 15:20:05,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:05,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:05,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:05,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:05,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229726750] [2024-06-20 15:20:05,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229726750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:05,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:05,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:05,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713126427] [2024-06-20 15:20:05,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:05,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:05,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:05,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:05,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:06,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:06,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 218 transitions, 2364 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:06,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:06,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:06,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:06,470 INFO L124 PetriNetUnfolderBase]: 1986/3392 cut-off events. [2024-06-20 15:20:06,470 INFO L125 PetriNetUnfolderBase]: For 118622/118622 co-relation queries the response was YES. [2024-06-20 15:20:06,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19752 conditions, 3392 events. 1986/3392 cut-off events. For 118622/118622 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 21231 event pairs, 446 based on Foata normal form. 2/3389 useless extension candidates. Maximal degree in co-relation 19658. Up to 2983 conditions per place. [2024-06-20 15:20:06,499 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 51 changer transitions 0/242 dead transitions. [2024-06-20 15:20:06,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 242 transitions, 3116 flow [2024-06-20 15:20:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:06,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:20:06,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:20:06,501 INFO L175 Difference]: Start difference. First operand has 198 places, 218 transitions, 2364 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:20:06,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 242 transitions, 3116 flow [2024-06-20 15:20:06,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 242 transitions, 3001 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-20 15:20:06,760 INFO L231 Difference]: Finished difference. Result has 204 places, 226 transitions, 2510 flow [2024-06-20 15:20:06,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2253, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2510, PETRI_PLACES=204, PETRI_TRANSITIONS=226} [2024-06-20 15:20:06,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 15:20:06,761 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 226 transitions, 2510 flow [2024-06-20 15:20:06,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:06,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:06,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:06,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:20:06,761 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:06,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:06,762 INFO L85 PathProgramCache]: Analyzing trace with hash -565120804, now seen corresponding path program 3 times [2024-06-20 15:20:06,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:06,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823026439] [2024-06-20 15:20:06,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:06,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:06,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:06,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823026439] [2024-06-20 15:20:06,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823026439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:06,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:06,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:06,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875982291] [2024-06-20 15:20:06,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:06,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:06,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:06,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:06,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:06,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:06,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 226 transitions, 2510 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:06,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:06,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:06,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:07,470 INFO L124 PetriNetUnfolderBase]: 1988/3397 cut-off events. [2024-06-20 15:20:07,471 INFO L125 PetriNetUnfolderBase]: For 122572/122572 co-relation queries the response was YES. [2024-06-20 15:20:07,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19994 conditions, 3397 events. 1988/3397 cut-off events. For 122572/122572 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 21261 event pairs, 446 based on Foata normal form. 2/3394 useless extension candidates. Maximal degree in co-relation 19897. Up to 2987 conditions per place. [2024-06-20 15:20:07,503 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 59 changer transitions 0/247 dead transitions. [2024-06-20 15:20:07,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 247 transitions, 3199 flow [2024-06-20 15:20:07,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:07,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-20 15:20:07,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-20 15:20:07,504 INFO L175 Difference]: Start difference. First operand has 204 places, 226 transitions, 2510 flow. Second operand 9 states and 209 transitions. [2024-06-20 15:20:07,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 247 transitions, 3199 flow [2024-06-20 15:20:07,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 247 transitions, 3072 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:07,804 INFO L231 Difference]: Finished difference. Result has 210 places, 230 transitions, 2581 flow [2024-06-20 15:20:07,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2395, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2581, PETRI_PLACES=210, PETRI_TRANSITIONS=230} [2024-06-20 15:20:07,805 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 15:20:07,805 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 230 transitions, 2581 flow [2024-06-20 15:20:07,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:07,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:07,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:07,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:20:07,806 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:07,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:07,806 INFO L85 PathProgramCache]: Analyzing trace with hash -2128791118, now seen corresponding path program 4 times [2024-06-20 15:20:07,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:07,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066561021] [2024-06-20 15:20:07,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:07,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:07,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:07,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066561021] [2024-06-20 15:20:07,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066561021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:07,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:07,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:07,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491586431] [2024-06-20 15:20:07,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:07,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:07,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:07,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:07,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:07,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:07,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 230 transitions, 2581 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:07,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:07,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:07,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:08,365 INFO L124 PetriNetUnfolderBase]: 2000/3419 cut-off events. [2024-06-20 15:20:08,365 INFO L125 PetriNetUnfolderBase]: For 127111/127111 co-relation queries the response was YES. [2024-06-20 15:20:08,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20310 conditions, 3419 events. 2000/3419 cut-off events. For 127111/127111 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 21399 event pairs, 446 based on Foata normal form. 2/3416 useless extension candidates. Maximal degree in co-relation 20211. Up to 2929 conditions per place. [2024-06-20 15:20:08,398 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 173 selfloop transitions, 72 changer transitions 0/253 dead transitions. [2024-06-20 15:20:08,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 253 transitions, 3337 flow [2024-06-20 15:20:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:08,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:08,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:20:08,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:20:08,399 INFO L175 Difference]: Start difference. First operand has 210 places, 230 transitions, 2581 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:20:08,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 253 transitions, 3337 flow [2024-06-20 15:20:08,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 253 transitions, 3185 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:08,707 INFO L231 Difference]: Finished difference. Result has 210 places, 235 transitions, 2729 flow [2024-06-20 15:20:08,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2729, PETRI_PLACES=210, PETRI_TRANSITIONS=235} [2024-06-20 15:20:08,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-20 15:20:08,708 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 235 transitions, 2729 flow [2024-06-20 15:20:08,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:08,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:08,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:08,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:20:08,709 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:08,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:08,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2128785538, now seen corresponding path program 5 times [2024-06-20 15:20:08,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:08,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378688670] [2024-06-20 15:20:08,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:08,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:08,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:08,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378688670] [2024-06-20 15:20:08,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378688670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:08,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:08,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:08,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419825843] [2024-06-20 15:20:08,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:08,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:08,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:08,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:08,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:08,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:08,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 235 transitions, 2729 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:08,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:08,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:08,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:09,288 INFO L124 PetriNetUnfolderBase]: 2010/3437 cut-off events. [2024-06-20 15:20:09,288 INFO L125 PetriNetUnfolderBase]: For 133204/133204 co-relation queries the response was YES. [2024-06-20 15:20:09,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20777 conditions, 3437 events. 2010/3437 cut-off events. For 133204/133204 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 21611 event pairs, 446 based on Foata normal form. 2/3434 useless extension candidates. Maximal degree in co-relation 20676. Up to 2939 conditions per place. [2024-06-20 15:20:09,322 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 166 selfloop transitions, 85 changer transitions 0/259 dead transitions. [2024-06-20 15:20:09,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 259 transitions, 3488 flow [2024-06-20 15:20:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:09,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:20:09,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:20:09,323 INFO L175 Difference]: Start difference. First operand has 210 places, 235 transitions, 2729 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:20:09,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 259 transitions, 3488 flow [2024-06-20 15:20:09,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 259 transitions, 3270 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:09,629 INFO L231 Difference]: Finished difference. Result has 214 places, 239 transitions, 2780 flow [2024-06-20 15:20:09,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2529, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2780, PETRI_PLACES=214, PETRI_TRANSITIONS=239} [2024-06-20 15:20:09,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-20 15:20:09,629 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 239 transitions, 2780 flow [2024-06-20 15:20:09,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:09,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:09,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:09,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:20:09,630 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:09,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:09,631 INFO L85 PathProgramCache]: Analyzing trace with hash -2121433888, now seen corresponding path program 6 times [2024-06-20 15:20:09,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:09,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890018833] [2024-06-20 15:20:09,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:09,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:09,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:09,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:09,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890018833] [2024-06-20 15:20:09,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890018833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:09,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:09,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:09,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390023470] [2024-06-20 15:20:09,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:09,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:09,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:09,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:09,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:09,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 239 transitions, 2780 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:09,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:09,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:09,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:10,192 INFO L124 PetriNetUnfolderBase]: 2012/3443 cut-off events. [2024-06-20 15:20:10,192 INFO L125 PetriNetUnfolderBase]: For 131828/131831 co-relation queries the response was YES. [2024-06-20 15:20:10,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20654 conditions, 3443 events. 2012/3443 cut-off events. For 131828/131831 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 21666 event pairs, 465 based on Foata normal form. 4/3440 useless extension candidates. Maximal degree in co-relation 20552. Up to 2943 conditions per place. [2024-06-20 15:20:10,224 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 89 changer transitions 0/259 dead transitions. [2024-06-20 15:20:10,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 259 transitions, 3499 flow [2024-06-20 15:20:10,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:10,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 15:20:10,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-20 15:20:10,225 INFO L175 Difference]: Start difference. First operand has 214 places, 239 transitions, 2780 flow. Second operand 8 states and 189 transitions. [2024-06-20 15:20:10,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 259 transitions, 3499 flow [2024-06-20 15:20:10,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 259 transitions, 3277 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:10,545 INFO L231 Difference]: Finished difference. Result has 216 places, 243 transitions, 2822 flow [2024-06-20 15:20:10,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2568, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2822, PETRI_PLACES=216, PETRI_TRANSITIONS=243} [2024-06-20 15:20:10,546 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-20 15:20:10,546 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 243 transitions, 2822 flow [2024-06-20 15:20:10,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:10,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:10,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:10,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:20:10,547 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:10,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:10,548 INFO L85 PathProgramCache]: Analyzing trace with hash 741427622, now seen corresponding path program 1 times [2024-06-20 15:20:10,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:10,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389583609] [2024-06-20 15:20:10,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:10,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:10,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:10,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:10,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389583609] [2024-06-20 15:20:10,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389583609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:10,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:10,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:10,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092473104] [2024-06-20 15:20:10,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:10,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:10,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:10,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:10,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:10,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:10,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 243 transitions, 2822 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:10,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:10,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:10,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:11,176 INFO L124 PetriNetUnfolderBase]: 2041/3487 cut-off events. [2024-06-20 15:20:11,176 INFO L125 PetriNetUnfolderBase]: For 134171/134174 co-relation queries the response was YES. [2024-06-20 15:20:11,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21140 conditions, 3487 events. 2041/3487 cut-off events. For 134171/134174 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21880 event pairs, 467 based on Foata normal form. 1/3478 useless extension candidates. Maximal degree in co-relation 21037. Up to 2944 conditions per place. [2024-06-20 15:20:11,207 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 169 selfloop transitions, 101 changer transitions 0/278 dead transitions. [2024-06-20 15:20:11,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 278 transitions, 3815 flow [2024-06-20 15:20:11,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:11,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:11,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:20:11,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:20:11,208 INFO L175 Difference]: Start difference. First operand has 216 places, 243 transitions, 2822 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:20:11,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 278 transitions, 3815 flow [2024-06-20 15:20:11,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 278 transitions, 3575 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:11,544 INFO L231 Difference]: Finished difference. Result has 217 places, 253 transitions, 2973 flow [2024-06-20 15:20:11,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2596, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2973, PETRI_PLACES=217, PETRI_TRANSITIONS=253} [2024-06-20 15:20:11,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-20 15:20:11,545 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 253 transitions, 2973 flow [2024-06-20 15:20:11,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:11,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:11,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:11,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:20:11,545 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:11,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:11,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1748574422, now seen corresponding path program 2 times [2024-06-20 15:20:11,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:11,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809083887] [2024-06-20 15:20:11,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:11,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:11,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:11,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:11,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:11,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809083887] [2024-06-20 15:20:11,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809083887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:11,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:11,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:11,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189783763] [2024-06-20 15:20:11,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:11,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:11,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:11,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:11,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:11,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:11,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 253 transitions, 2973 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:11,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:11,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:11,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:12,146 INFO L124 PetriNetUnfolderBase]: 2038/3487 cut-off events. [2024-06-20 15:20:12,146 INFO L125 PetriNetUnfolderBase]: For 137470/137473 co-relation queries the response was YES. [2024-06-20 15:20:12,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21110 conditions, 3487 events. 2038/3487 cut-off events. For 137470/137473 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21941 event pairs, 448 based on Foata normal form. 3/3484 useless extension candidates. Maximal degree in co-relation 21006. Up to 3086 conditions per place. [2024-06-20 15:20:12,181 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 53 changer transitions 0/273 dead transitions. [2024-06-20 15:20:12,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 273 transitions, 3553 flow [2024-06-20 15:20:12,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:12,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 15:20:12,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-20 15:20:12,183 INFO L175 Difference]: Start difference. First operand has 217 places, 253 transitions, 2973 flow. Second operand 7 states and 172 transitions. [2024-06-20 15:20:12,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 273 transitions, 3553 flow [2024-06-20 15:20:12,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 273 transitions, 3366 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:12,523 INFO L231 Difference]: Finished difference. Result has 221 places, 253 transitions, 2898 flow [2024-06-20 15:20:12,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2786, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2898, PETRI_PLACES=221, PETRI_TRANSITIONS=253} [2024-06-20 15:20:12,523 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-20 15:20:12,523 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 253 transitions, 2898 flow [2024-06-20 15:20:12,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:12,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:12,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:12,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:20:12,524 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:12,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:12,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1571442902, now seen corresponding path program 3 times [2024-06-20 15:20:12,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:12,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712734715] [2024-06-20 15:20:12,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:12,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:12,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:12,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:12,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:12,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712734715] [2024-06-20 15:20:12,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712734715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:12,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:12,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:12,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670135061] [2024-06-20 15:20:12,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:12,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:12,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:12,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:12,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 253 transitions, 2898 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:12,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:12,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:12,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:13,117 INFO L124 PetriNetUnfolderBase]: 2066/3534 cut-off events. [2024-06-20 15:20:13,117 INFO L125 PetriNetUnfolderBase]: For 143794/143797 co-relation queries the response was YES. [2024-06-20 15:20:13,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21413 conditions, 3534 events. 2066/3534 cut-off events. For 143794/143797 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22253 event pairs, 448 based on Foata normal form. 3/3531 useless extension candidates. Maximal degree in co-relation 21308. Up to 3107 conditions per place. [2024-06-20 15:20:13,151 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 68 changer transitions 0/287 dead transitions. [2024-06-20 15:20:13,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 287 transitions, 3854 flow [2024-06-20 15:20:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:13,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:13,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 15:20:13,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:20:13,152 INFO L175 Difference]: Start difference. First operand has 221 places, 253 transitions, 2898 flow. Second operand 8 states and 188 transitions. [2024-06-20 15:20:13,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 287 transitions, 3854 flow [2024-06-20 15:20:13,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 287 transitions, 3706 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:13,639 INFO L231 Difference]: Finished difference. Result has 227 places, 268 transitions, 3170 flow [2024-06-20 15:20:13,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2770, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3170, PETRI_PLACES=227, PETRI_TRANSITIONS=268} [2024-06-20 15:20:13,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-20 15:20:13,640 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 268 transitions, 3170 flow [2024-06-20 15:20:13,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:13,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:13,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:13,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:20:13,641 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:13,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:13,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1653841288, now seen corresponding path program 4 times [2024-06-20 15:20:13,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:13,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4419727] [2024-06-20 15:20:13,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:13,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:13,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:13,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4419727] [2024-06-20 15:20:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4419727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:13,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:13,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:13,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759401754] [2024-06-20 15:20:13,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:13,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:13,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:13,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:13,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:13,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:13,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 268 transitions, 3170 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:13,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:13,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:13,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:14,221 INFO L124 PetriNetUnfolderBase]: 2103/3590 cut-off events. [2024-06-20 15:20:14,221 INFO L125 PetriNetUnfolderBase]: For 155097/155097 co-relation queries the response was YES. [2024-06-20 15:20:14,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22205 conditions, 3590 events. 2103/3590 cut-off events. For 155097/155097 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22656 event pairs, 446 based on Foata normal form. 1/3586 useless extension candidates. Maximal degree in co-relation 22097. Up to 2992 conditions per place. [2024-06-20 15:20:14,259 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 117 changer transitions 0/302 dead transitions. [2024-06-20 15:20:14,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 302 transitions, 4328 flow [2024-06-20 15:20:14,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:14,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:14,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:20:14,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:20:14,260 INFO L175 Difference]: Start difference. First operand has 227 places, 268 transitions, 3170 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:20:14,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 302 transitions, 4328 flow [2024-06-20 15:20:14,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 302 transitions, 4206 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-20 15:20:14,629 INFO L231 Difference]: Finished difference. Result has 232 places, 279 transitions, 3472 flow [2024-06-20 15:20:14,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3048, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3472, PETRI_PLACES=232, PETRI_TRANSITIONS=279} [2024-06-20 15:20:14,630 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-20 15:20:14,630 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 279 transitions, 3472 flow [2024-06-20 15:20:14,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:14,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:14,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:14,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:20:14,631 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:14,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:14,631 INFO L85 PathProgramCache]: Analyzing trace with hash -383159282, now seen corresponding path program 5 times [2024-06-20 15:20:14,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:14,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933035200] [2024-06-20 15:20:14,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:14,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:14,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:14,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:14,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933035200] [2024-06-20 15:20:14,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933035200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:14,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:14,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:14,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598500499] [2024-06-20 15:20:14,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:14,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:14,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:14,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:14,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:14,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:14,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 279 transitions, 3472 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:14,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:14,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:14,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:15,271 INFO L124 PetriNetUnfolderBase]: 2100/3586 cut-off events. [2024-06-20 15:20:15,272 INFO L125 PetriNetUnfolderBase]: For 159298/159298 co-relation queries the response was YES. [2024-06-20 15:20:15,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22408 conditions, 3586 events. 2100/3586 cut-off events. For 159298/159298 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22625 event pairs, 446 based on Foata normal form. 1/3582 useless extension candidates. Maximal degree in co-relation 22299. Up to 3161 conditions per place. [2024-06-20 15:20:15,308 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 231 selfloop transitions, 57 changer transitions 0/296 dead transitions. [2024-06-20 15:20:15,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 296 transitions, 4090 flow [2024-06-20 15:20:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:15,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:20:15,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:20:15,309 INFO L175 Difference]: Start difference. First operand has 232 places, 279 transitions, 3472 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:20:15,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 296 transitions, 4090 flow [2024-06-20 15:20:15,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 296 transitions, 3796 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:15,790 INFO L231 Difference]: Finished difference. Result has 235 places, 279 transitions, 3298 flow [2024-06-20 15:20:15,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3178, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3298, PETRI_PLACES=235, PETRI_TRANSITIONS=279} [2024-06-20 15:20:15,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-20 15:20:15,790 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 279 transitions, 3298 flow [2024-06-20 15:20:15,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:15,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:15,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:15,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:20:15,791 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:15,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:15,791 INFO L85 PathProgramCache]: Analyzing trace with hash -466733658, now seen corresponding path program 6 times [2024-06-20 15:20:15,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:15,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327596896] [2024-06-20 15:20:15,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:15,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:15,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:15,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327596896] [2024-06-20 15:20:15,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327596896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:15,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:15,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:15,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606055460] [2024-06-20 15:20:15,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:15,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:15,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:15,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:15,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:15,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:15,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 279 transitions, 3298 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:15,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:15,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:15,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:16,400 INFO L124 PetriNetUnfolderBase]: 2105/3595 cut-off events. [2024-06-20 15:20:16,401 INFO L125 PetriNetUnfolderBase]: For 163218/163218 co-relation queries the response was YES. [2024-06-20 15:20:16,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22276 conditions, 3595 events. 2105/3595 cut-off events. For 163218/163218 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22723 event pairs, 446 based on Foata normal form. 1/3591 useless extension candidates. Maximal degree in co-relation 22166. Up to 2994 conditions per place. [2024-06-20 15:20:16,437 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 179 selfloop transitions, 117 changer transitions 0/304 dead transitions. [2024-06-20 15:20:16,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 304 transitions, 4217 flow [2024-06-20 15:20:16,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:16,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:20:16,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:20:16,438 INFO L175 Difference]: Start difference. First operand has 235 places, 279 transitions, 3298 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:20:16,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 304 transitions, 4217 flow [2024-06-20 15:20:16,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 4101 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:16,843 INFO L231 Difference]: Finished difference. Result has 237 places, 282 transitions, 3467 flow [2024-06-20 15:20:16,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3182, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3467, PETRI_PLACES=237, PETRI_TRANSITIONS=282} [2024-06-20 15:20:16,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 15:20:16,844 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 282 transitions, 3467 flow [2024-06-20 15:20:16,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:16,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:16,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:16,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:20:16,844 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:16,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:16,845 INFO L85 PathProgramCache]: Analyzing trace with hash -454353498, now seen corresponding path program 7 times [2024-06-20 15:20:16,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:16,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096766779] [2024-06-20 15:20:16,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:16,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:16,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:16,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:16,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096766779] [2024-06-20 15:20:16,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096766779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:16,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:16,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:16,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523063450] [2024-06-20 15:20:16,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:16,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:16,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:16,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:16,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 282 transitions, 3467 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:16,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:16,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:16,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:17,422 INFO L124 PetriNetUnfolderBase]: 2097/3583 cut-off events. [2024-06-20 15:20:17,422 INFO L125 PetriNetUnfolderBase]: For 167342/167342 co-relation queries the response was YES. [2024-06-20 15:20:17,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22419 conditions, 3583 events. 2097/3583 cut-off events. For 167342/167342 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22655 event pairs, 446 based on Foata normal form. 2/3580 useless extension candidates. Maximal degree in co-relation 22308. Up to 2986 conditions per place. [2024-06-20 15:20:17,459 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 183 selfloop transitions, 109 changer transitions 0/300 dead transitions. [2024-06-20 15:20:17,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 300 transitions, 4211 flow [2024-06-20 15:20:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:20:17,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:20:17,460 INFO L175 Difference]: Start difference. First operand has 237 places, 282 transitions, 3467 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:20:17,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 300 transitions, 4211 flow [2024-06-20 15:20:17,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 300 transitions, 3906 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:17,963 INFO L231 Difference]: Finished difference. Result has 239 places, 282 transitions, 3388 flow [2024-06-20 15:20:17,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3162, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3388, PETRI_PLACES=239, PETRI_TRANSITIONS=282} [2024-06-20 15:20:17,963 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-20 15:20:17,964 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 282 transitions, 3388 flow [2024-06-20 15:20:17,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:17,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:17,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:17,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:20:17,964 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:17,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:17,965 INFO L85 PathProgramCache]: Analyzing trace with hash -339062328, now seen corresponding path program 8 times [2024-06-20 15:20:17,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:17,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094187132] [2024-06-20 15:20:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:17,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:17,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094187132] [2024-06-20 15:20:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094187132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:18,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:18,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:18,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000378015] [2024-06-20 15:20:18,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:18,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:18,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:18,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:18,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:18,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:18,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 282 transitions, 3388 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:18,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:18,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:18,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:18,667 INFO L124 PetriNetUnfolderBase]: 2091/3575 cut-off events. [2024-06-20 15:20:18,667 INFO L125 PetriNetUnfolderBase]: For 168708/168708 co-relation queries the response was YES. [2024-06-20 15:20:18,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22238 conditions, 3575 events. 2091/3575 cut-off events. For 168708/168708 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22613 event pairs, 446 based on Foata normal form. 2/3572 useless extension candidates. Maximal degree in co-relation 22126. Up to 3108 conditions per place. [2024-06-20 15:20:18,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 68 changer transitions 0/297 dead transitions. [2024-06-20 15:20:18,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 297 transitions, 4120 flow [2024-06-20 15:20:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:18,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:18,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 15:20:18,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-20 15:20:18,706 INFO L175 Difference]: Start difference. First operand has 239 places, 282 transitions, 3388 flow. Second operand 7 states and 169 transitions. [2024-06-20 15:20:18,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 297 transitions, 4120 flow [2024-06-20 15:20:19,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 297 transitions, 3888 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:19,154 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3301 flow [2024-06-20 15:20:19,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3156, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3301, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-20 15:20:19,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-20 15:20:19,155 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3301 flow [2024-06-20 15:20:19,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:19,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:19,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:19,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:20:19,155 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:19,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:19,156 INFO L85 PathProgramCache]: Analyzing trace with hash -339329238, now seen corresponding path program 9 times [2024-06-20 15:20:19,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:19,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728779912] [2024-06-20 15:20:19,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:19,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:19,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:19,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728779912] [2024-06-20 15:20:19,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728779912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:19,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:19,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:19,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622683679] [2024-06-20 15:20:19,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:19,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:19,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:19,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:19,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:19,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:19,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3301 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:19,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:19,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:19,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:19,819 INFO L124 PetriNetUnfolderBase]: 2083/3563 cut-off events. [2024-06-20 15:20:19,819 INFO L125 PetriNetUnfolderBase]: For 169771/169771 co-relation queries the response was YES. [2024-06-20 15:20:19,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21967 conditions, 3563 events. 2083/3563 cut-off events. For 169771/169771 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22521 event pairs, 446 based on Foata normal form. 2/3560 useless extension candidates. Maximal degree in co-relation 21854. Up to 3100 conditions per place. [2024-06-20 15:20:19,857 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 218 selfloop transitions, 72 changer transitions 0/298 dead transitions. [2024-06-20 15:20:19,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 298 transitions, 3919 flow [2024-06-20 15:20:19,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:19,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:19,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-20 15:20:19,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-20 15:20:19,859 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3301 flow. Second operand 9 states and 208 transitions. [2024-06-20 15:20:19,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 298 transitions, 3919 flow [2024-06-20 15:20:20,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 298 transitions, 3757 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:20,315 INFO L231 Difference]: Finished difference. Result has 245 places, 282 transitions, 3290 flow [2024-06-20 15:20:20,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3139, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3290, PETRI_PLACES=245, PETRI_TRANSITIONS=282} [2024-06-20 15:20:20,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-20 15:20:20,315 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 282 transitions, 3290 flow [2024-06-20 15:20:20,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:20,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:20,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:20,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:20:20,316 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:20,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1779111698, now seen corresponding path program 10 times [2024-06-20 15:20:20,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:20,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903726760] [2024-06-20 15:20:20,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:20,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903726760] [2024-06-20 15:20:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903726760] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:20,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283747697] [2024-06-20 15:20:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:20,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:20,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 282 transitions, 3290 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:20,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:20,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:20,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:20,975 INFO L124 PetriNetUnfolderBase]: 2077/3558 cut-off events. [2024-06-20 15:20:20,976 INFO L125 PetriNetUnfolderBase]: For 171307/171310 co-relation queries the response was YES. [2024-06-20 15:20:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21831 conditions, 3558 events. 2077/3558 cut-off events. For 171307/171310 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 22501 event pairs, 448 based on Foata normal form. 4/3556 useless extension candidates. Maximal degree in co-relation 21717. Up to 2998 conditions per place. [2024-06-20 15:20:21,013 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 182 selfloop transitions, 123 changer transitions 0/313 dead transitions. [2024-06-20 15:20:21,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 313 transitions, 4100 flow [2024-06-20 15:20:21,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:21,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:21,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:20:21,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:20:21,014 INFO L175 Difference]: Start difference. First operand has 245 places, 282 transitions, 3290 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:20:21,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 313 transitions, 4100 flow [2024-06-20 15:20:21,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 313 transitions, 3864 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 15:20:21,553 INFO L231 Difference]: Finished difference. Result has 243 places, 282 transitions, 3319 flow [2024-06-20 15:20:21,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3054, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3319, PETRI_PLACES=243, PETRI_TRANSITIONS=282} [2024-06-20 15:20:21,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-20 15:20:21,553 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 282 transitions, 3319 flow [2024-06-20 15:20:21,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:21,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:21,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:21,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:20:21,554 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:21,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:21,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1931509590, now seen corresponding path program 11 times [2024-06-20 15:20:21,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:21,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105953245] [2024-06-20 15:20:21,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:21,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:21,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:21,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:21,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105953245] [2024-06-20 15:20:21,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105953245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:21,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:21,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719722027] [2024-06-20 15:20:21,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:21,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:21,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:21,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:21,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:21,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:21,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 282 transitions, 3319 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:21,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:21,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:21,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:22,231 INFO L124 PetriNetUnfolderBase]: 2071/3547 cut-off events. [2024-06-20 15:20:22,232 INFO L125 PetriNetUnfolderBase]: For 172112/172112 co-relation queries the response was YES. [2024-06-20 15:20:22,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21834 conditions, 3547 events. 2071/3547 cut-off events. For 172112/172112 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22443 event pairs, 446 based on Foata normal form. 2/3544 useless extension candidates. Maximal degree in co-relation 21720. Up to 2993 conditions per place. [2024-06-20 15:20:22,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 191 selfloop transitions, 103 changer transitions 0/302 dead transitions. [2024-06-20 15:20:22,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 302 transitions, 4081 flow [2024-06-20 15:20:22,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:22,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:20:22,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:20:22,282 INFO L175 Difference]: Start difference. First operand has 243 places, 282 transitions, 3319 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:20:22,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 302 transitions, 4081 flow [2024-06-20 15:20:22,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 302 transitions, 3764 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 15:20:22,836 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3235 flow [2024-06-20 15:20:22,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3235, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-20 15:20:22,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-20 15:20:22,837 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3235 flow [2024-06-20 15:20:22,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:22,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:22,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:20:22,837 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:22,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash -163473132, now seen corresponding path program 12 times [2024-06-20 15:20:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005994009] [2024-06-20 15:20:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:22,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:22,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005994009] [2024-06-20 15:20:22,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005994009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:22,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:22,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:22,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064638470] [2024-06-20 15:20:22,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:22,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:22,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:22,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:22,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:22,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:22,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3235 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:22,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:22,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:22,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:23,476 INFO L124 PetriNetUnfolderBase]: 2063/3535 cut-off events. [2024-06-20 15:20:23,476 INFO L125 PetriNetUnfolderBase]: For 158221/158221 co-relation queries the response was YES. [2024-06-20 15:20:23,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21387 conditions, 3535 events. 2063/3535 cut-off events. For 158221/158221 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 22363 event pairs, 446 based on Foata normal form. 2/3532 useless extension candidates. Maximal degree in co-relation 21274. Up to 2985 conditions per place. [2024-06-20 15:20:23,515 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 186 selfloop transitions, 115 changer transitions 0/309 dead transitions. [2024-06-20 15:20:23,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 309 transitions, 3905 flow [2024-06-20 15:20:23,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:23,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:23,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:20:23,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:20:23,516 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3235 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:20:23,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 309 transitions, 3905 flow [2024-06-20 15:20:23,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 309 transitions, 3613 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:23,998 INFO L231 Difference]: Finished difference. Result has 240 places, 282 transitions, 3193 flow [2024-06-20 15:20:23,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2943, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3193, PETRI_PLACES=240, PETRI_TRANSITIONS=282} [2024-06-20 15:20:23,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 198 predicate places. [2024-06-20 15:20:23,999 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 282 transitions, 3193 flow [2024-06-20 15:20:23,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:23,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:24,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:24,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:20:24,000 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:24,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:24,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1924322736, now seen corresponding path program 1 times [2024-06-20 15:20:24,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:24,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928933784] [2024-06-20 15:20:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:24,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:24,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:24,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928933784] [2024-06-20 15:20:24,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928933784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:24,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:24,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:20:24,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127674400] [2024-06-20 15:20:24,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:24,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:20:24,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:24,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:20:24,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:20:24,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:20:24,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 282 transitions, 3193 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:24,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:24,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:20:24,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:24,577 INFO L124 PetriNetUnfolderBase]: 1982/3442 cut-off events. [2024-06-20 15:20:24,577 INFO L125 PetriNetUnfolderBase]: For 163155/163155 co-relation queries the response was YES. [2024-06-20 15:20:24,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20844 conditions, 3442 events. 1982/3442 cut-off events. For 163155/163155 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 21968 event pairs, 329 based on Foata normal form. 7/3415 useless extension candidates. Maximal degree in co-relation 20732. Up to 2845 conditions per place. [2024-06-20 15:20:24,613 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 229 selfloop transitions, 27 changer transitions 0/305 dead transitions. [2024-06-20 15:20:24,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 305 transitions, 3789 flow [2024-06-20 15:20:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:20:24,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:20:24,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-20 15:20:24,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2024-06-20 15:20:24,614 INFO L175 Difference]: Start difference. First operand has 240 places, 282 transitions, 3193 flow. Second operand 5 states and 138 transitions. [2024-06-20 15:20:24,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 305 transitions, 3789 flow [2024-06-20 15:20:25,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 305 transitions, 3540 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:20:25,037 INFO L231 Difference]: Finished difference. Result has 235 places, 283 transitions, 3020 flow [2024-06-20 15:20:25,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3020, PETRI_PLACES=235, PETRI_TRANSITIONS=283} [2024-06-20 15:20:25,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-20 15:20:25,037 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 283 transitions, 3020 flow [2024-06-20 15:20:25,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:25,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:25,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:25,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:20:25,038 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:25,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:25,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1346158912, now seen corresponding path program 2 times [2024-06-20 15:20:25,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:25,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654322559] [2024-06-20 15:20:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:25,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:25,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:25,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:25,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654322559] [2024-06-20 15:20:25,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654322559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:25,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:25,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:20:25,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290529070] [2024-06-20 15:20:25,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:25,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:20:25,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:25,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:20:25,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:20:25,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-20 15:20:25,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 283 transitions, 3020 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:25,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:25,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-20 15:20:25,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:25,597 INFO L124 PetriNetUnfolderBase]: 1984/3431 cut-off events. [2024-06-20 15:20:25,597 INFO L125 PetriNetUnfolderBase]: For 146793/146807 co-relation queries the response was YES. [2024-06-20 15:20:25,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20202 conditions, 3431 events. 1984/3431 cut-off events. For 146793/146807 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21951 event pairs, 343 based on Foata normal form. 20/3412 useless extension candidates. Maximal degree in co-relation 20092. Up to 2748 conditions per place. [2024-06-20 15:20:25,638 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 231 selfloop transitions, 24 changer transitions 0/304 dead transitions. [2024-06-20 15:20:25,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 304 transitions, 3732 flow [2024-06-20 15:20:25,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:20:25,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:20:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-20 15:20:25,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-20 15:20:25,639 INFO L175 Difference]: Start difference. First operand has 235 places, 283 transitions, 3020 flow. Second operand 5 states and 132 transitions. [2024-06-20 15:20:25,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 304 transitions, 3732 flow [2024-06-20 15:20:26,128 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 304 transitions, 3682 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:26,131 INFO L231 Difference]: Finished difference. Result has 237 places, 284 transitions, 3034 flow [2024-06-20 15:20:26,131 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3034, PETRI_PLACES=237, PETRI_TRANSITIONS=284} [2024-06-20 15:20:26,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-20 15:20:26,132 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 284 transitions, 3034 flow [2024-06-20 15:20:26,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:26,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:26,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:26,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:20:26,133 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:26,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:26,133 INFO L85 PathProgramCache]: Analyzing trace with hash -457200538, now seen corresponding path program 1 times [2024-06-20 15:20:26,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:26,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872137740] [2024-06-20 15:20:26,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:26,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872137740] [2024-06-20 15:20:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872137740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:26,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:26,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:26,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024509516] [2024-06-20 15:20:26,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:26,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:26,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:26,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:26,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:26,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 284 transitions, 3034 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:26,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:26,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:26,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:26,778 INFO L124 PetriNetUnfolderBase]: 2101/3626 cut-off events. [2024-06-20 15:20:26,778 INFO L125 PetriNetUnfolderBase]: For 143222/143222 co-relation queries the response was YES. [2024-06-20 15:20:26,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21184 conditions, 3626 events. 2101/3626 cut-off events. For 143222/143222 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23112 event pairs, 409 based on Foata normal form. 2/3626 useless extension candidates. Maximal degree in co-relation 21073. Up to 3224 conditions per place. [2024-06-20 15:20:26,813 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 272 selfloop transitions, 31 changer transitions 0/311 dead transitions. [2024-06-20 15:20:26,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 311 transitions, 3920 flow [2024-06-20 15:20:26,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:26,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 15:20:26,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:20:26,814 INFO L175 Difference]: Start difference. First operand has 237 places, 284 transitions, 3034 flow. Second operand 7 states and 168 transitions. [2024-06-20 15:20:26,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 311 transitions, 3920 flow [2024-06-20 15:20:27,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 311 transitions, 3879 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:20:27,199 INFO L231 Difference]: Finished difference. Result has 242 places, 288 transitions, 3172 flow [2024-06-20 15:20:27,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3172, PETRI_PLACES=242, PETRI_TRANSITIONS=288} [2024-06-20 15:20:27,200 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-20 15:20:27,200 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 288 transitions, 3172 flow [2024-06-20 15:20:27,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:27,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:27,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:27,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:20:27,201 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:27,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash -117185172, now seen corresponding path program 2 times [2024-06-20 15:20:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:27,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271391114] [2024-06-20 15:20:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:27,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:27,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:27,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271391114] [2024-06-20 15:20:27,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271391114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:27,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:27,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:27,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012969421] [2024-06-20 15:20:27,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:27,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:27,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:27,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:27,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:27,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 288 transitions, 3172 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:27,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:27,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:27,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:27,785 INFO L124 PetriNetUnfolderBase]: 2109/3633 cut-off events. [2024-06-20 15:20:27,785 INFO L125 PetriNetUnfolderBase]: For 148636/148636 co-relation queries the response was YES. [2024-06-20 15:20:27,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21360 conditions, 3633 events. 2109/3633 cut-off events. For 148636/148636 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 23155 event pairs, 440 based on Foata normal form. 2/3633 useless extension candidates. Maximal degree in co-relation 21248. Up to 3269 conditions per place. [2024-06-20 15:20:27,821 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 272 selfloop transitions, 28 changer transitions 0/308 dead transitions. [2024-06-20 15:20:27,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 308 transitions, 3874 flow [2024-06-20 15:20:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:27,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-20 15:20:27,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-20 15:20:27,822 INFO L175 Difference]: Start difference. First operand has 242 places, 288 transitions, 3172 flow. Second operand 7 states and 163 transitions. [2024-06-20 15:20:27,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 308 transitions, 3874 flow [2024-06-20 15:20:28,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 308 transitions, 3758 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:28,227 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 3179 flow [2024-06-20 15:20:28,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3074, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3179, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-20 15:20:28,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-20 15:20:28,228 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 3179 flow [2024-06-20 15:20:28,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:28,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:28,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:28,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:20:28,228 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:28,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash 902508, now seen corresponding path program 3 times [2024-06-20 15:20:28,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:28,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305964561] [2024-06-20 15:20:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:28,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:28,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:28,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:28,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305964561] [2024-06-20 15:20:28,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305964561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:28,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:28,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:28,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443965954] [2024-06-20 15:20:28,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:28,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:28,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:28,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:28,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:28,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 3179 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:28,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:28,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:28,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:28,890 INFO L124 PetriNetUnfolderBase]: 2117/3645 cut-off events. [2024-06-20 15:20:28,891 INFO L125 PetriNetUnfolderBase]: For 153166/153166 co-relation queries the response was YES. [2024-06-20 15:20:28,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21434 conditions, 3645 events. 2117/3645 cut-off events. For 153166/153166 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 23196 event pairs, 440 based on Foata normal form. 2/3645 useless extension candidates. Maximal degree in co-relation 21320. Up to 3296 conditions per place. [2024-06-20 15:20:28,931 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 279 selfloop transitions, 20 changer transitions 0/307 dead transitions. [2024-06-20 15:20:28,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 307 transitions, 3857 flow [2024-06-20 15:20:28,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:28,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:28,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-20 15:20:28,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-20 15:20:28,933 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 3179 flow. Second operand 7 states and 159 transitions. [2024-06-20 15:20:28,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 307 transitions, 3857 flow [2024-06-20 15:20:29,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 307 transitions, 3772 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:29,345 INFO L231 Difference]: Finished difference. Result has 248 places, 292 transitions, 3187 flow [2024-06-20 15:20:29,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3094, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3187, PETRI_PLACES=248, PETRI_TRANSITIONS=292} [2024-06-20 15:20:29,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-20 15:20:29,346 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 292 transitions, 3187 flow [2024-06-20 15:20:29,346 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) [2024-06-20 15:20:29,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:29,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:29,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:20:29,346 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:29,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:29,347 INFO L85 PathProgramCache]: Analyzing trace with hash -338867710, now seen corresponding path program 1 times [2024-06-20 15:20:29,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:29,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823759465] [2024-06-20 15:20:29,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:29,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:29,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:29,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:29,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823759465] [2024-06-20 15:20:29,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823759465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:29,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:29,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:29,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36720944] [2024-06-20 15:20:29,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:29,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:29,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:29,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:29,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:29,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:29,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 292 transitions, 3187 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:29,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:29,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:29,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:29,946 INFO L124 PetriNetUnfolderBase]: 2133/3664 cut-off events. [2024-06-20 15:20:29,946 INFO L125 PetriNetUnfolderBase]: For 161867/161867 co-relation queries the response was YES. [2024-06-20 15:20:29,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21625 conditions, 3664 events. 2133/3664 cut-off events. For 161867/161867 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23293 event pairs, 452 based on Foata normal form. 4/3663 useless extension candidates. Maximal degree in co-relation 21510. Up to 3212 conditions per place. [2024-06-20 15:20:29,983 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 247 selfloop transitions, 55 changer transitions 0/310 dead transitions. [2024-06-20 15:20:29,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 310 transitions, 3887 flow [2024-06-20 15:20:29,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:29,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-20 15:20:29,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-20 15:20:29,984 INFO L175 Difference]: Start difference. First operand has 248 places, 292 transitions, 3187 flow. Second operand 7 states and 167 transitions. [2024-06-20 15:20:29,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 310 transitions, 3887 flow [2024-06-20 15:20:30,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 310 transitions, 3814 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:30,483 INFO L231 Difference]: Finished difference. Result has 250 places, 295 transitions, 3296 flow [2024-06-20 15:20:30,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3296, PETRI_PLACES=250, PETRI_TRANSITIONS=295} [2024-06-20 15:20:30,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-20 15:20:30,484 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 295 transitions, 3296 flow [2024-06-20 15:20:30,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:30,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:30,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:30,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:20:30,485 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:30,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:30,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1568018906, now seen corresponding path program 4 times [2024-06-20 15:20:30,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:30,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115235958] [2024-06-20 15:20:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:30,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:30,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:30,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115235958] [2024-06-20 15:20:30,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115235958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:30,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:30,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:30,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863102293] [2024-06-20 15:20:30,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:30,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:30,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:30,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:30,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 295 transitions, 3296 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:30,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:30,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:30,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:31,135 INFO L124 PetriNetUnfolderBase]: 2128/3667 cut-off events. [2024-06-20 15:20:31,136 INFO L125 PetriNetUnfolderBase]: For 159578/159578 co-relation queries the response was YES. [2024-06-20 15:20:31,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21709 conditions, 3667 events. 2128/3667 cut-off events. For 159578/159578 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 23382 event pairs, 408 based on Foata normal form. 2/3667 useless extension candidates. Maximal degree in co-relation 21593. Up to 3277 conditions per place. [2024-06-20 15:20:31,173 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 278 selfloop transitions, 29 changer transitions 0/315 dead transitions. [2024-06-20 15:20:31,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 315 transitions, 3960 flow [2024-06-20 15:20:31,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:31,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 15:20:31,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-20 15:20:31,175 INFO L175 Difference]: Start difference. First operand has 250 places, 295 transitions, 3296 flow. Second operand 6 states and 148 transitions. [2024-06-20 15:20:31,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 315 transitions, 3960 flow [2024-06-20 15:20:31,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 315 transitions, 3770 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:31,641 INFO L231 Difference]: Finished difference. Result has 251 places, 295 transitions, 3175 flow [2024-06-20 15:20:31,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3175, PETRI_PLACES=251, PETRI_TRANSITIONS=295} [2024-06-20 15:20:31,642 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 209 predicate places. [2024-06-20 15:20:31,642 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 295 transitions, 3175 flow [2024-06-20 15:20:31,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:31,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:31,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:31,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:20:31,643 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:31,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:31,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1339933058, now seen corresponding path program 2 times [2024-06-20 15:20:31,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:31,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635542070] [2024-06-20 15:20:31,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:31,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:31,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:31,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:31,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635542070] [2024-06-20 15:20:31,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635542070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:31,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:31,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:31,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444432061] [2024-06-20 15:20:31,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:31,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:31,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:31,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:31,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:31,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:31,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 295 transitions, 3175 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:31,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:31,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:31,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:32,298 INFO L124 PetriNetUnfolderBase]: 2144/3682 cut-off events. [2024-06-20 15:20:32,299 INFO L125 PetriNetUnfolderBase]: For 168664/168667 co-relation queries the response was YES. [2024-06-20 15:20:32,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21730 conditions, 3682 events. 2144/3682 cut-off events. For 168664/168667 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23475 event pairs, 472 based on Foata normal form. 6/3681 useless extension candidates. Maximal degree in co-relation 21613. Up to 3229 conditions per place. [2024-06-20 15:20:32,335 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 244 selfloop transitions, 57 changer transitions 0/309 dead transitions. [2024-06-20 15:20:32,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 309 transitions, 3869 flow [2024-06-20 15:20:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:32,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:20:32,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-20 15:20:32,337 INFO L175 Difference]: Start difference. First operand has 251 places, 295 transitions, 3175 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:20:32,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 309 transitions, 3869 flow [2024-06-20 15:20:32,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 309 transitions, 3802 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:32,813 INFO L231 Difference]: Finished difference. Result has 252 places, 298 transitions, 3300 flow [2024-06-20 15:20:32,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3108, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3300, PETRI_PLACES=252, PETRI_TRANSITIONS=298} [2024-06-20 15:20:32,814 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 15:20:32,814 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 298 transitions, 3300 flow [2024-06-20 15:20:32,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:32,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:32,814 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:32,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:20:32,814 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:32,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:32,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1567834208, now seen corresponding path program 3 times [2024-06-20 15:20:32,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:32,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10350894] [2024-06-20 15:20:32,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:32,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:32,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:32,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10350894] [2024-06-20 15:20:32,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10350894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:32,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:32,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377960048] [2024-06-20 15:20:32,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:32,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:32,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:32,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:32,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 298 transitions, 3300 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:32,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:32,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:32,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:33,461 INFO L124 PetriNetUnfolderBase]: 2160/3705 cut-off events. [2024-06-20 15:20:33,462 INFO L125 PetriNetUnfolderBase]: For 169656/169656 co-relation queries the response was YES. [2024-06-20 15:20:33,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22144 conditions, 3705 events. 2160/3705 cut-off events. For 169656/169656 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 23572 event pairs, 455 based on Foata normal form. 4/3704 useless extension candidates. Maximal degree in co-relation 22026. Up to 3241 conditions per place. [2024-06-20 15:20:33,500 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 60 changer transitions 0/315 dead transitions. [2024-06-20 15:20:33,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 315 transitions, 4020 flow [2024-06-20 15:20:33,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:33,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:33,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:20:33,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:20:33,502 INFO L175 Difference]: Start difference. First operand has 252 places, 298 transitions, 3300 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:20:33,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 315 transitions, 4020 flow [2024-06-20 15:20:34,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 315 transitions, 3850 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:34,041 INFO L231 Difference]: Finished difference. Result has 254 places, 301 transitions, 3338 flow [2024-06-20 15:20:34,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3130, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3338, PETRI_PLACES=254, PETRI_TRANSITIONS=301} [2024-06-20 15:20:34,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-20 15:20:34,041 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 301 transitions, 3338 flow [2024-06-20 15:20:34,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:34,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:34,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:20:34,042 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:34,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:34,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1331362178, now seen corresponding path program 4 times [2024-06-20 15:20:34,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:34,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867525129] [2024-06-20 15:20:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:34,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:34,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:34,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867525129] [2024-06-20 15:20:34,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867525129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:34,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:34,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:20:34,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616408433] [2024-06-20 15:20:34,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:34,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:20:34,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:34,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:20:34,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:20:34,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:34,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 301 transitions, 3338 flow. Second operand has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:34,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:34,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:34,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:34,693 INFO L124 PetriNetUnfolderBase]: 2163/3700 cut-off events. [2024-06-20 15:20:34,693 INFO L125 PetriNetUnfolderBase]: For 171550/171553 co-relation queries the response was YES. [2024-06-20 15:20:34,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22140 conditions, 3700 events. 2163/3700 cut-off events. For 171550/171553 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 23498 event pairs, 463 based on Foata normal form. 6/3699 useless extension candidates. Maximal degree in co-relation 22021. Up to 3206 conditions per place. [2024-06-20 15:20:34,738 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 68 changer transitions 0/318 dead transitions. [2024-06-20 15:20:34,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 318 transitions, 4093 flow [2024-06-20 15:20:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:20:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:20:34,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 15:20:34,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:20:34,740 INFO L175 Difference]: Start difference. First operand has 254 places, 301 transitions, 3338 flow. Second operand 6 states and 144 transitions. [2024-06-20 15:20:34,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 318 transitions, 4093 flow [2024-06-20 15:20:35,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 318 transitions, 3905 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:35,432 INFO L231 Difference]: Finished difference. Result has 257 places, 306 transitions, 3423 flow [2024-06-20 15:20:35,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3158, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3423, PETRI_PLACES=257, PETRI_TRANSITIONS=306} [2024-06-20 15:20:35,433 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-20 15:20:35,433 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 306 transitions, 3423 flow [2024-06-20 15:20:35,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.0) internal successors, (119), 7 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:35,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:35,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:35,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:20:35,433 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:35,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:35,434 INFO L85 PathProgramCache]: Analyzing trace with hash -613418445, now seen corresponding path program 1 times [2024-06-20 15:20:35,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:35,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803534607] [2024-06-20 15:20:35,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:35,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803534607] [2024-06-20 15:20:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803534607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:35,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:35,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:35,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472431352] [2024-06-20 15:20:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:35,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:35,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:35,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 306 transitions, 3423 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:35,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:35,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:35,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:36,150 INFO L124 PetriNetUnfolderBase]: 2322/3975 cut-off events. [2024-06-20 15:20:36,150 INFO L125 PetriNetUnfolderBase]: For 229163/229163 co-relation queries the response was YES. [2024-06-20 15:20:36,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25230 conditions, 3975 events. 2322/3975 cut-off events. For 229163/229163 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25562 event pairs, 410 based on Foata normal form. 12/3982 useless extension candidates. Maximal degree in co-relation 25109. Up to 2861 conditions per place. [2024-06-20 15:20:36,201 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 117 changer transitions 0/346 dead transitions. [2024-06-20 15:20:36,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 346 transitions, 4667 flow [2024-06-20 15:20:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:20:36,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:20:36,203 INFO L175 Difference]: Start difference. First operand has 257 places, 306 transitions, 3423 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:20:36,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 346 transitions, 4667 flow [2024-06-20 15:20:36,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 346 transitions, 4517 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-20 15:20:36,720 INFO L231 Difference]: Finished difference. Result has 264 places, 311 transitions, 3658 flow [2024-06-20 15:20:36,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3273, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3658, PETRI_PLACES=264, PETRI_TRANSITIONS=311} [2024-06-20 15:20:36,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-20 15:20:36,721 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 311 transitions, 3658 flow [2024-06-20 15:20:36,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:36,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:36,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:36,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:20:36,722 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:36,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:36,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1199599919, now seen corresponding path program 2 times [2024-06-20 15:20:36,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:36,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935812370] [2024-06-20 15:20:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:36,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:36,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:36,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:36,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:36,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935812370] [2024-06-20 15:20:36,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935812370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:36,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:36,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:36,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265840731] [2024-06-20 15:20:36,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:36,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:36,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:36,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:36,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:36,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:36,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 311 transitions, 3658 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:36,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:36,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:36,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:37,519 INFO L124 PetriNetUnfolderBase]: 2378/4066 cut-off events. [2024-06-20 15:20:37,519 INFO L125 PetriNetUnfolderBase]: For 248844/248844 co-relation queries the response was YES. [2024-06-20 15:20:37,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26460 conditions, 4066 events. 2378/4066 cut-off events. For 248844/248844 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 26244 event pairs, 525 based on Foata normal form. 16/4077 useless extension candidates. Maximal degree in co-relation 26336. Up to 3384 conditions per place. [2024-06-20 15:20:37,567 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 213 selfloop transitions, 114 changer transitions 0/335 dead transitions. [2024-06-20 15:20:37,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 335 transitions, 4446 flow [2024-06-20 15:20:37,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:37,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:37,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:20:37,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:20:37,569 INFO L175 Difference]: Start difference. First operand has 264 places, 311 transitions, 3658 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:20:37,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 335 transitions, 4446 flow [2024-06-20 15:20:38,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 335 transitions, 4260 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-20 15:20:38,059 INFO L231 Difference]: Finished difference. Result has 269 places, 313 transitions, 3770 flow [2024-06-20 15:20:38,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3474, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3770, PETRI_PLACES=269, PETRI_TRANSITIONS=313} [2024-06-20 15:20:38,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-20 15:20:38,060 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 313 transitions, 3770 flow [2024-06-20 15:20:38,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:38,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:38,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:20:38,060 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:38,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash 748920015, now seen corresponding path program 3 times [2024-06-20 15:20:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831539304] [2024-06-20 15:20:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:38,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:38,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:38,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831539304] [2024-06-20 15:20:38,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831539304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:38,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:38,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:38,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704260145] [2024-06-20 15:20:38,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:38,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:38,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:38,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:38,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:38,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:38,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 313 transitions, 3770 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:38,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:38,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:38,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:38,831 INFO L124 PetriNetUnfolderBase]: 2484/4242 cut-off events. [2024-06-20 15:20:38,831 INFO L125 PetriNetUnfolderBase]: For 271767/271767 co-relation queries the response was YES. [2024-06-20 15:20:38,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28466 conditions, 4242 events. 2484/4242 cut-off events. For 271767/271767 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 27595 event pairs, 542 based on Foata normal form. 12/4249 useless extension candidates. Maximal degree in co-relation 28340. Up to 3390 conditions per place. [2024-06-20 15:20:38,882 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 223 selfloop transitions, 112 changer transitions 0/343 dead transitions. [2024-06-20 15:20:38,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 343 transitions, 4782 flow [2024-06-20 15:20:38,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:20:38,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:20:38,883 INFO L175 Difference]: Start difference. First operand has 269 places, 313 transitions, 3770 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:20:38,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 343 transitions, 4782 flow [2024-06-20 15:20:39,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 343 transitions, 4516 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:39,461 INFO L231 Difference]: Finished difference. Result has 272 places, 317 transitions, 3871 flow [2024-06-20 15:20:39,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3504, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3871, PETRI_PLACES=272, PETRI_TRANSITIONS=317} [2024-06-20 15:20:39,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-20 15:20:39,461 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 317 transitions, 3871 flow [2024-06-20 15:20:39,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:39,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:39,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:39,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:20:39,462 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:39,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:39,462 INFO L85 PathProgramCache]: Analyzing trace with hash 28126859, now seen corresponding path program 4 times [2024-06-20 15:20:39,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:39,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475788417] [2024-06-20 15:20:39,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:39,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475788417] [2024-06-20 15:20:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475788417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:39,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822621208] [2024-06-20 15:20:39,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:39,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:39,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:39,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 317 transitions, 3871 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:39,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:39,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:39,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:40,285 INFO L124 PetriNetUnfolderBase]: 2540/4326 cut-off events. [2024-06-20 15:20:40,285 INFO L125 PetriNetUnfolderBase]: For 295346/295346 co-relation queries the response was YES. [2024-06-20 15:20:40,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29230 conditions, 4326 events. 2540/4326 cut-off events. For 295346/295346 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 28220 event pairs, 557 based on Foata normal form. 16/4337 useless extension candidates. Maximal degree in co-relation 29102. Up to 3756 conditions per place. [2024-06-20 15:20:40,337 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 72 changer transitions 0/338 dead transitions. [2024-06-20 15:20:40,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 338 transitions, 4663 flow [2024-06-20 15:20:40,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:40,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:20:40,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 15:20:40,338 INFO L175 Difference]: Start difference. First operand has 272 places, 317 transitions, 3871 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:20:40,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 338 transitions, 4663 flow [2024-06-20 15:20:41,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 338 transitions, 4473 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:41,037 INFO L231 Difference]: Finished difference. Result has 276 places, 319 transitions, 3901 flow [2024-06-20 15:20:41,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3681, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3901, PETRI_PLACES=276, PETRI_TRANSITIONS=319} [2024-06-20 15:20:41,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 15:20:41,038 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 319 transitions, 3901 flow [2024-06-20 15:20:41,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:41,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:41,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:41,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:20:41,039 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:41,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:41,039 INFO L85 PathProgramCache]: Analyzing trace with hash 27978989, now seen corresponding path program 5 times [2024-06-20 15:20:41,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:41,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37990728] [2024-06-20 15:20:41,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:41,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:41,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:41,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:41,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37990728] [2024-06-20 15:20:41,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37990728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:41,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:41,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:41,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233911037] [2024-06-20 15:20:41,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:41,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:41,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:41,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:41,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:41,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:41,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 319 transitions, 3901 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:41,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:41,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:41,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:41,898 INFO L124 PetriNetUnfolderBase]: 2692/4568 cut-off events. [2024-06-20 15:20:41,898 INFO L125 PetriNetUnfolderBase]: For 341045/341045 co-relation queries the response was YES. [2024-06-20 15:20:41,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32543 conditions, 4568 events. 2692/4568 cut-off events. For 341045/341045 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29965 event pairs, 580 based on Foata normal form. 12/4575 useless extension candidates. Maximal degree in co-relation 32413. Up to 3750 conditions per place. [2024-06-20 15:20:41,954 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 269 selfloop transitions, 70 changer transitions 0/347 dead transitions. [2024-06-20 15:20:41,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 347 transitions, 4973 flow [2024-06-20 15:20:41,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:20:41,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:20:41,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:20:41,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:20:41,957 INFO L175 Difference]: Start difference. First operand has 276 places, 319 transitions, 3901 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:20:41,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 347 transitions, 4973 flow [2024-06-20 15:20:42,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 347 transitions, 4783 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:42,740 INFO L231 Difference]: Finished difference. Result has 279 places, 323 transitions, 4011 flow [2024-06-20 15:20:42,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3711, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4011, PETRI_PLACES=279, PETRI_TRANSITIONS=323} [2024-06-20 15:20:42,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-20 15:20:42,741 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 323 transitions, 4011 flow [2024-06-20 15:20:42,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:42,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:42,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:42,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:20:42,741 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:42,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:42,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1915178565, now seen corresponding path program 6 times [2024-06-20 15:20:42,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:42,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774796952] [2024-06-20 15:20:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:42,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:42,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:42,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774796952] [2024-06-20 15:20:42,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774796952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:42,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:42,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:42,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336515535] [2024-06-20 15:20:42,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:42,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:42,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:42,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:42,923 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:42,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 323 transitions, 4011 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:42,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:42,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:42,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:43,632 INFO L124 PetriNetUnfolderBase]: 2702/4590 cut-off events. [2024-06-20 15:20:43,633 INFO L125 PetriNetUnfolderBase]: For 341038/341038 co-relation queries the response was YES. [2024-06-20 15:20:43,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32111 conditions, 4590 events. 2702/4590 cut-off events. For 341038/341038 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 30209 event pairs, 593 based on Foata normal form. 16/4601 useless extension candidates. Maximal degree in co-relation 31979. Up to 4010 conditions per place. [2024-06-20 15:20:43,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 260 selfloop transitions, 78 changer transitions 0/346 dead transitions. [2024-06-20 15:20:43,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 346 transitions, 4832 flow [2024-06-20 15:20:43,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:20:43,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:20:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:20:43,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:20:43,691 INFO L175 Difference]: Start difference. First operand has 279 places, 323 transitions, 4011 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:20:43,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 346 transitions, 4832 flow [2024-06-20 15:20:44,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 346 transitions, 4680 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-20 15:20:44,594 INFO L231 Difference]: Finished difference. Result has 285 places, 325 transitions, 4100 flow [2024-06-20 15:20:44,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4100, PETRI_PLACES=285, PETRI_TRANSITIONS=325} [2024-06-20 15:20:44,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-20 15:20:44,595 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 325 transitions, 4100 flow [2024-06-20 15:20:44,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:44,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:44,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:44,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:20:44,596 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:44,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:44,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1914963363, now seen corresponding path program 1 times [2024-06-20 15:20:44,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:44,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719845181] [2024-06-20 15:20:44,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:44,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:44,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719845181] [2024-06-20 15:20:44,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719845181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:44,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:44,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:44,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617235248] [2024-06-20 15:20:44,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:44,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:44,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:44,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:44,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:44,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:44,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 325 transitions, 4100 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:44,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:44,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:44,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:45,503 INFO L124 PetriNetUnfolderBase]: 2742/4660 cut-off events. [2024-06-20 15:20:45,503 INFO L125 PetriNetUnfolderBase]: For 338817/338817 co-relation queries the response was YES. [2024-06-20 15:20:45,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32625 conditions, 4660 events. 2742/4660 cut-off events. For 338817/338817 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 30767 event pairs, 591 based on Foata normal form. 12/4667 useless extension candidates. Maximal degree in co-relation 32491. Up to 3950 conditions per place. [2024-06-20 15:20:45,562 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 258 selfloop transitions, 85 changer transitions 0/351 dead transitions. [2024-06-20 15:20:45,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 351 transitions, 4944 flow [2024-06-20 15:20:45,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:20:45,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:20:45,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-20 15:20:45,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-20 15:20:45,564 INFO L175 Difference]: Start difference. First operand has 285 places, 325 transitions, 4100 flow. Second operand 10 states and 232 transitions. [2024-06-20 15:20:45,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 351 transitions, 4944 flow [2024-06-20 15:20:46,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 351 transitions, 4738 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:46,474 INFO L231 Difference]: Finished difference. Result has 287 places, 327 transitions, 4143 flow [2024-06-20 15:20:46,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4143, PETRI_PLACES=287, PETRI_TRANSITIONS=327} [2024-06-20 15:20:46,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-20 15:20:46,475 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 327 transitions, 4143 flow [2024-06-20 15:20:46,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:46,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:46,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:46,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:20:46,476 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:46,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:46,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1413609129, now seen corresponding path program 7 times [2024-06-20 15:20:46,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:46,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184733926] [2024-06-20 15:20:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:46,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:46,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:46,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:46,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184733926] [2024-06-20 15:20:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184733926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:46,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:46,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186918564] [2024-06-20 15:20:46,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:46,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:46,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:46,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:46,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:46,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 327 transitions, 4143 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:46,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:46,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:46,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:47,472 INFO L124 PetriNetUnfolderBase]: 2798/4747 cut-off events. [2024-06-20 15:20:47,472 INFO L125 PetriNetUnfolderBase]: For 361962/361965 co-relation queries the response was YES. [2024-06-20 15:20:47,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33338 conditions, 4747 events. 2798/4747 cut-off events. For 361962/361965 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 31503 event pairs, 632 based on Foata normal form. 18/4758 useless extension candidates. Maximal degree in co-relation 33203. Up to 4074 conditions per place. [2024-06-20 15:20:47,529 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 221 selfloop transitions, 120 changer transitions 0/349 dead transitions. [2024-06-20 15:20:47,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 349 transitions, 4971 flow [2024-06-20 15:20:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:47,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-20 15:20:47,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-20 15:20:47,531 INFO L175 Difference]: Start difference. First operand has 287 places, 327 transitions, 4143 flow. Second operand 9 states and 210 transitions. [2024-06-20 15:20:47,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 349 transitions, 4971 flow [2024-06-20 15:20:48,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 349 transitions, 4746 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:48,483 INFO L231 Difference]: Finished difference. Result has 288 places, 329 transitions, 4246 flow [2024-06-20 15:20:48,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3918, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4246, PETRI_PLACES=288, PETRI_TRANSITIONS=329} [2024-06-20 15:20:48,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 15:20:48,484 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 329 transitions, 4246 flow [2024-06-20 15:20:48,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:48,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:48,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:48,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:20:48,485 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:48,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:48,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1219669719, now seen corresponding path program 8 times [2024-06-20 15:20:48,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:48,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608878717] [2024-06-20 15:20:48,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:48,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:48,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:48,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:48,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608878717] [2024-06-20 15:20:48,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608878717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:48,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:48,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:48,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304014954] [2024-06-20 15:20:48,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:48,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:48,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:48,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:48,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:48,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:48,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 329 transitions, 4246 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:48,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:48,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:48,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:49,448 INFO L124 PetriNetUnfolderBase]: 2854/4834 cut-off events. [2024-06-20 15:20:49,448 INFO L125 PetriNetUnfolderBase]: For 374157/374157 co-relation queries the response was YES. [2024-06-20 15:20:49,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34150 conditions, 4834 events. 2854/4834 cut-off events. For 374157/374157 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 32107 event pairs, 619 based on Foata normal form. 16/4845 useless extension candidates. Maximal degree in co-relation 34014. Up to 4098 conditions per place. [2024-06-20 15:20:49,511 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 225 selfloop transitions, 121 changer transitions 0/354 dead transitions. [2024-06-20 15:20:49,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 354 transitions, 5096 flow [2024-06-20 15:20:49,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:49,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:49,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-20 15:20:49,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 15:20:49,513 INFO L175 Difference]: Start difference. First operand has 288 places, 329 transitions, 4246 flow. Second operand 9 states and 213 transitions. [2024-06-20 15:20:49,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 354 transitions, 5096 flow [2024-06-20 15:20:50,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 354 transitions, 4798 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:50,431 INFO L231 Difference]: Finished difference. Result has 290 places, 331 transitions, 4286 flow [2024-06-20 15:20:50,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3948, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4286, PETRI_PLACES=290, PETRI_TRANSITIONS=331} [2024-06-20 15:20:50,431 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 15:20:50,431 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 331 transitions, 4286 flow [2024-06-20 15:20:50,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:50,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:50,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:50,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:20:50,432 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:50,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:50,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1363796719, now seen corresponding path program 9 times [2024-06-20 15:20:50,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:50,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156042986] [2024-06-20 15:20:50,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:50,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:50,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:50,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156042986] [2024-06-20 15:20:50,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156042986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:50,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:50,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:50,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28020164] [2024-06-20 15:20:50,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:50,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:50,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:50,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:50,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 331 transitions, 4286 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:50,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:50,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:50,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:51,471 INFO L124 PetriNetUnfolderBase]: 2897/4911 cut-off events. [2024-06-20 15:20:51,471 INFO L125 PetriNetUnfolderBase]: For 379656/379656 co-relation queries the response was YES. [2024-06-20 15:20:51,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34506 conditions, 4911 events. 2897/4911 cut-off events. For 379656/379656 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32726 event pairs, 632 based on Foata normal form. 16/4922 useless extension candidates. Maximal degree in co-relation 34369. Up to 4167 conditions per place. [2024-06-20 15:20:51,530 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 237 selfloop transitions, 109 changer transitions 0/354 dead transitions. [2024-06-20 15:20:51,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 354 transitions, 5136 flow [2024-06-20 15:20:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:51,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:51,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-20 15:20:51,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-20 15:20:51,531 INFO L175 Difference]: Start difference. First operand has 290 places, 331 transitions, 4286 flow. Second operand 7 states and 173 transitions. [2024-06-20 15:20:51,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 354 transitions, 5136 flow [2024-06-20 15:20:52,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 354 transitions, 4840 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-20 15:20:52,407 INFO L231 Difference]: Finished difference. Result has 290 places, 333 transitions, 4308 flow [2024-06-20 15:20:52,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3990, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4308, PETRI_PLACES=290, PETRI_TRANSITIONS=333} [2024-06-20 15:20:52,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 15:20:52,408 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 333 transitions, 4308 flow [2024-06-20 15:20:52,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:52,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:52,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:52,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:20:52,409 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:52,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:52,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1214159469, now seen corresponding path program 10 times [2024-06-20 15:20:52,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:52,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937933147] [2024-06-20 15:20:52,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:52,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:52,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937933147] [2024-06-20 15:20:52,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937933147] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:52,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:52,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:52,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827727476] [2024-06-20 15:20:52,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:52,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:52,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:52,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:52,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:52,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:52,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 333 transitions, 4308 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:52,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:52,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:52,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:53,387 INFO L124 PetriNetUnfolderBase]: 2911/4944 cut-off events. [2024-06-20 15:20:53,387 INFO L125 PetriNetUnfolderBase]: For 359094/359094 co-relation queries the response was YES. [2024-06-20 15:20:53,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34027 conditions, 4944 events. 2911/4944 cut-off events. For 359094/359094 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32976 event pairs, 511 based on Foata normal form. 12/4951 useless extension candidates. Maximal degree in co-relation 33889. Up to 3526 conditions per place. [2024-06-20 15:20:53,448 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 117 changer transitions 0/364 dead transitions. [2024-06-20 15:20:53,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 364 transitions, 5392 flow [2024-06-20 15:20:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:20:53,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:20:53,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-20 15:20:53,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-20 15:20:53,449 INFO L175 Difference]: Start difference. First operand has 290 places, 333 transitions, 4308 flow. Second operand 7 states and 180 transitions. [2024-06-20 15:20:53,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 364 transitions, 5392 flow [2024-06-20 15:20:54,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 364 transitions, 5118 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-20 15:20:54,362 INFO L231 Difference]: Finished difference. Result has 293 places, 336 transitions, 4459 flow [2024-06-20 15:20:54,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4034, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4459, PETRI_PLACES=293, PETRI_TRANSITIONS=336} [2024-06-20 15:20:54,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-20 15:20:54,363 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 336 transitions, 4459 flow [2024-06-20 15:20:54,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:54,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:54,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:54,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:20:54,364 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:54,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:54,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1411749217, now seen corresponding path program 2 times [2024-06-20 15:20:54,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:54,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332103145] [2024-06-20 15:20:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:54,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:54,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:54,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:54,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332103145] [2024-06-20 15:20:54,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332103145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:54,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:54,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:54,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244388833] [2024-06-20 15:20:54,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:54,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:54,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:54,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:54,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:54,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:54,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 336 transitions, 4459 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:54,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:54,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:54,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:55,427 INFO L124 PetriNetUnfolderBase]: 2951/5012 cut-off events. [2024-06-20 15:20:55,427 INFO L125 PetriNetUnfolderBase]: For 370155/370158 co-relation queries the response was YES. [2024-06-20 15:20:55,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34801 conditions, 5012 events. 2951/5012 cut-off events. For 370155/370158 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 33621 event pairs, 651 based on Foata normal form. 14/5019 useless extension candidates. Maximal degree in co-relation 34661. Up to 4261 conditions per place. [2024-06-20 15:20:55,483 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 229 selfloop transitions, 125 changer transitions 0/362 dead transitions. [2024-06-20 15:20:55,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 362 transitions, 5337 flow [2024-06-20 15:20:55,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:20:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:20:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-20 15:20:55,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-20 15:20:55,484 INFO L175 Difference]: Start difference. First operand has 293 places, 336 transitions, 4459 flow. Second operand 10 states and 232 transitions. [2024-06-20 15:20:55,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 362 transitions, 5337 flow [2024-06-20 15:20:56,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 362 transitions, 4931 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 15:20:56,616 INFO L231 Difference]: Finished difference. Result has 297 places, 338 transitions, 4394 flow [2024-06-20 15:20:56,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4394, PETRI_PLACES=297, PETRI_TRANSITIONS=338} [2024-06-20 15:20:56,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-20 15:20:56,616 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 338 transitions, 4394 flow [2024-06-20 15:20:56,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:56,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:56,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:56,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:20:56,617 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:56,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:56,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1677446497, now seen corresponding path program 3 times [2024-06-20 15:20:56,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:56,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082536664] [2024-06-20 15:20:56,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:56,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:56,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082536664] [2024-06-20 15:20:56,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082536664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:56,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:56,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:56,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252047418] [2024-06-20 15:20:56,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:56,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:56,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:56,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 338 transitions, 4394 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:56,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:56,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:56,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:57,584 INFO L124 PetriNetUnfolderBase]: 3024/5145 cut-off events. [2024-06-20 15:20:57,584 INFO L125 PetriNetUnfolderBase]: For 382805/382808 co-relation queries the response was YES. [2024-06-20 15:20:57,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35275 conditions, 5145 events. 3024/5145 cut-off events. For 382805/382808 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34691 event pairs, 652 based on Foata normal form. 14/5152 useless extension candidates. Maximal degree in co-relation 35135. Up to 3898 conditions per place. [2024-06-20 15:20:57,651 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 147 changer transitions 0/366 dead transitions. [2024-06-20 15:20:57,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 366 transitions, 5462 flow [2024-06-20 15:20:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:57,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:57,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:20:57,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-20 15:20:57,652 INFO L175 Difference]: Start difference. First operand has 297 places, 338 transitions, 4394 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:20:57,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 366 transitions, 5462 flow [2024-06-20 15:20:58,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 366 transitions, 5147 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-20 15:20:58,584 INFO L231 Difference]: Finished difference. Result has 298 places, 341 transitions, 4492 flow [2024-06-20 15:20:58,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4492, PETRI_PLACES=298, PETRI_TRANSITIONS=341} [2024-06-20 15:20:58,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-20 15:20:58,585 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 341 transitions, 4492 flow [2024-06-20 15:20:58,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:58,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:20:58,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:20:58,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:20:58,585 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:20:58,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:20:58,586 INFO L85 PathProgramCache]: Analyzing trace with hash -1358219137, now seen corresponding path program 4 times [2024-06-20 15:20:58,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:20:58,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294417124] [2024-06-20 15:20:58,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:20:58,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:20:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:20:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:20:58,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:20:58,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294417124] [2024-06-20 15:20:58,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294417124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:20:58,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:20:58,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:20:58,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767692233] [2024-06-20 15:20:58,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:20:58,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:20:58,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:20:58,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:20:58,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:20:58,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:20:58,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 341 transitions, 4492 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:20:58,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:20:58,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:20:58,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:20:59,599 INFO L124 PetriNetUnfolderBase]: 2998/5100 cut-off events. [2024-06-20 15:20:59,599 INFO L125 PetriNetUnfolderBase]: For 353852/353852 co-relation queries the response was YES. [2024-06-20 15:20:59,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34018 conditions, 5100 events. 2998/5100 cut-off events. For 353852/353852 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 34306 event pairs, 631 based on Foata normal form. 12/5107 useless extension candidates. Maximal degree in co-relation 33877. Up to 4086 conditions per place. [2024-06-20 15:20:59,657 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 135 changer transitions 0/367 dead transitions. [2024-06-20 15:20:59,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 367 transitions, 5304 flow [2024-06-20 15:20:59,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:20:59,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:20:59,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:20:59,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:20:59,658 INFO L175 Difference]: Start difference. First operand has 298 places, 341 transitions, 4492 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:20:59,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 367 transitions, 5304 flow [2024-06-20 15:21:00,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 367 transitions, 5013 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-20 15:21:00,862 INFO L231 Difference]: Finished difference. Result has 301 places, 341 transitions, 4479 flow [2024-06-20 15:21:00,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4201, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4479, PETRI_PLACES=301, PETRI_TRANSITIONS=341} [2024-06-20 15:21:00,863 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 15:21:00,863 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 341 transitions, 4479 flow [2024-06-20 15:21:00,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:00,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:00,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:00,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:21:00,863 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:00,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash 983496381, now seen corresponding path program 1 times [2024-06-20 15:21:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:00,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667861076] [2024-06-20 15:21:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:00,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:00,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:00,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667861076] [2024-06-20 15:21:00,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667861076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:00,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:00,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:00,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573687012] [2024-06-20 15:21:00,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:00,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:00,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:00,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:00,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:01,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:01,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 341 transitions, 4479 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:01,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:01,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:01,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:01,820 INFO L124 PetriNetUnfolderBase]: 3019/5136 cut-off events. [2024-06-20 15:21:01,820 INFO L125 PetriNetUnfolderBase]: For 327451/327451 co-relation queries the response was YES. [2024-06-20 15:21:01,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34289 conditions, 5136 events. 3019/5136 cut-off events. For 327451/327451 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 34636 event pairs, 645 based on Foata normal form. 1/5133 useless extension candidates. Maximal degree in co-relation 34147. Up to 4641 conditions per place. [2024-06-20 15:21:01,883 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 329 selfloop transitions, 42 changer transitions 0/379 dead transitions. [2024-06-20 15:21:01,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 379 transitions, 5589 flow [2024-06-20 15:21:01,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:01,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:01,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:21:01,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:21:01,884 INFO L175 Difference]: Start difference. First operand has 301 places, 341 transitions, 4479 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:21:01,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 379 transitions, 5589 flow [2024-06-20 15:21:03,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 379 transitions, 5204 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-20 15:21:03,091 INFO L231 Difference]: Finished difference. Result has 301 places, 348 transitions, 4339 flow [2024-06-20 15:21:03,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4339, PETRI_PLACES=301, PETRI_TRANSITIONS=348} [2024-06-20 15:21:03,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-20 15:21:03,092 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 348 transitions, 4339 flow [2024-06-20 15:21:03,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:03,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:03,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:03,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:21:03,093 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:03,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1491633115, now seen corresponding path program 1 times [2024-06-20 15:21:03,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:03,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027867425] [2024-06-20 15:21:03,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:03,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:03,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:03,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:03,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:03,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027867425] [2024-06-20 15:21:03,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027867425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:03,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:03,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:03,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573586083] [2024-06-20 15:21:03,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:03,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:03,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:03,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:03,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:03,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:03,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 348 transitions, 4339 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:03,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:03,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:03,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:04,074 INFO L124 PetriNetUnfolderBase]: 3037/5161 cut-off events. [2024-06-20 15:21:04,074 INFO L125 PetriNetUnfolderBase]: For 330451/330451 co-relation queries the response was YES. [2024-06-20 15:21:04,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34330 conditions, 5161 events. 3037/5161 cut-off events. For 330451/330451 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 34926 event pairs, 665 based on Foata normal form. 1/5154 useless extension candidates. Maximal degree in co-relation 34187. Up to 4588 conditions per place. [2024-06-20 15:21:04,139 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 292 selfloop transitions, 71 changer transitions 0/371 dead transitions. [2024-06-20 15:21:04,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 371 transitions, 5339 flow [2024-06-20 15:21:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:21:04,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:21:04,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:21:04,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:21:04,140 INFO L175 Difference]: Start difference. First operand has 301 places, 348 transitions, 4339 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:21:04,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 371 transitions, 5339 flow [2024-06-20 15:21:05,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 371 transitions, 5199 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:05,442 INFO L231 Difference]: Finished difference. Result has 304 places, 357 transitions, 4469 flow [2024-06-20 15:21:05,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4202, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4469, PETRI_PLACES=304, PETRI_TRANSITIONS=357} [2024-06-20 15:21:05,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-20 15:21:05,443 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 357 transitions, 4469 flow [2024-06-20 15:21:05,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:05,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:05,443 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] [2024-06-20 15:21:05,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:21:05,443 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:05,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:05,444 INFO L85 PathProgramCache]: Analyzing trace with hash -552932441, now seen corresponding path program 2 times [2024-06-20 15:21:05,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:05,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099578308] [2024-06-20 15:21:05,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:05,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:05,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:05,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:05,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099578308] [2024-06-20 15:21:05,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099578308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:05,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:05,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:05,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967499466] [2024-06-20 15:21:05,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:05,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:05,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:05,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:05,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:05,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:05,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 357 transitions, 4469 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:05,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:05,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:05,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:06,543 INFO L124 PetriNetUnfolderBase]: 3042/5178 cut-off events. [2024-06-20 15:21:06,543 INFO L125 PetriNetUnfolderBase]: For 338147/338147 co-relation queries the response was YES. [2024-06-20 15:21:06,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34606 conditions, 5178 events. 3042/5178 cut-off events. For 338147/338147 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34955 event pairs, 646 based on Foata normal form. 1/5175 useless extension candidates. Maximal degree in co-relation 34460. Up to 4689 conditions per place. [2024-06-20 15:21:06,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 39 changer transitions 0/387 dead transitions. [2024-06-20 15:21:06,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 387 transitions, 5336 flow [2024-06-20 15:21:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:06,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:21:06,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:21:06,612 INFO L175 Difference]: Start difference. First operand has 304 places, 357 transitions, 4469 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:21:06,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 387 transitions, 5336 flow [2024-06-20 15:21:08,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 387 transitions, 5307 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-20 15:21:08,117 INFO L231 Difference]: Finished difference. Result has 311 places, 360 transitions, 4571 flow [2024-06-20 15:21:08,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4571, PETRI_PLACES=311, PETRI_TRANSITIONS=360} [2024-06-20 15:21:08,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-20 15:21:08,117 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 360 transitions, 4571 flow [2024-06-20 15:21:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:08,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:08,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:21:08,118 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:08,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1232625609, now seen corresponding path program 2 times [2024-06-20 15:21:08,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:08,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992563018] [2024-06-20 15:21:08,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:08,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:08,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:08,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992563018] [2024-06-20 15:21:08,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992563018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:08,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:08,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:08,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782006232] [2024-06-20 15:21:08,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:08,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:08,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:08,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:08,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:08,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:08,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 360 transitions, 4571 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:08,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:08,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:08,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:09,094 INFO L124 PetriNetUnfolderBase]: 3047/5177 cut-off events. [2024-06-20 15:21:09,094 INFO L125 PetriNetUnfolderBase]: For 346415/346415 co-relation queries the response was YES. [2024-06-20 15:21:09,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34872 conditions, 5177 events. 3047/5177 cut-off events. For 346415/346415 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 34993 event pairs, 665 based on Foata normal form. 1/5170 useless extension candidates. Maximal degree in co-relation 34724. Up to 4601 conditions per place. [2024-06-20 15:21:09,160 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 292 selfloop transitions, 76 changer transitions 0/376 dead transitions. [2024-06-20 15:21:09,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 376 transitions, 5530 flow [2024-06-20 15:21:09,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:21:09,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:21:09,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-20 15:21:09,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:21:09,161 INFO L175 Difference]: Start difference. First operand has 311 places, 360 transitions, 4571 flow. Second operand 5 states and 130 transitions. [2024-06-20 15:21:09,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 376 transitions, 5530 flow [2024-06-20 15:21:10,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 376 transitions, 5390 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:10,371 INFO L231 Difference]: Finished difference. Result has 309 places, 363 transitions, 4642 flow [2024-06-20 15:21:10,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4642, PETRI_PLACES=309, PETRI_TRANSITIONS=363} [2024-06-20 15:21:10,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-20 15:21:10,372 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 363 transitions, 4642 flow [2024-06-20 15:21:10,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:10,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:10,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:10,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:21:10,373 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:10,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:10,373 INFO L85 PathProgramCache]: Analyzing trace with hash -704383911, now seen corresponding path program 3 times [2024-06-20 15:21:10,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:10,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784922901] [2024-06-20 15:21:10,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:10,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:10,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784922901] [2024-06-20 15:21:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784922901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:10,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391335055] [2024-06-20 15:21:10,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:10,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:10,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:10,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:10,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 363 transitions, 4642 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:10,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:10,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:10,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:11,459 INFO L124 PetriNetUnfolderBase]: 3062/5206 cut-off events. [2024-06-20 15:21:11,460 INFO L125 PetriNetUnfolderBase]: For 354729/354729 co-relation queries the response was YES. [2024-06-20 15:21:11,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35214 conditions, 5206 events. 3062/5206 cut-off events. For 354729/354729 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 35155 event pairs, 644 based on Foata normal form. 1/5203 useless extension candidates. Maximal degree in co-relation 35066. Up to 4708 conditions per place. [2024-06-20 15:21:11,533 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 345 selfloop transitions, 49 changer transitions 0/402 dead transitions. [2024-06-20 15:21:11,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 402 transitions, 5628 flow [2024-06-20 15:21:11,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:21:11,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:21:11,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 255 transitions. [2024-06-20 15:21:11,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.565410199556541 [2024-06-20 15:21:11,534 INFO L175 Difference]: Start difference. First operand has 309 places, 363 transitions, 4642 flow. Second operand 11 states and 255 transitions. [2024-06-20 15:21:11,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 402 transitions, 5628 flow [2024-06-20 15:21:12,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 402 transitions, 5511 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:12,473 INFO L231 Difference]: Finished difference. Result has 316 places, 372 transitions, 4759 flow [2024-06-20 15:21:12,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4530, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4759, PETRI_PLACES=316, PETRI_TRANSITIONS=372} [2024-06-20 15:21:12,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 15:21:12,474 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 372 transitions, 4759 flow [2024-06-20 15:21:12,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:12,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:12,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:12,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:21:12,474 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:12,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:12,475 INFO L85 PathProgramCache]: Analyzing trace with hash 268955137, now seen corresponding path program 3 times [2024-06-20 15:21:12,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:12,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680367421] [2024-06-20 15:21:12,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:12,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:12,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:12,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680367421] [2024-06-20 15:21:12,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680367421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:12,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:12,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:12,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547939341] [2024-06-20 15:21:12,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:12,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:12,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:12,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:12,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:12,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:12,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 372 transitions, 4759 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:12,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:12,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:12,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:13,406 INFO L124 PetriNetUnfolderBase]: 3059/5194 cut-off events. [2024-06-20 15:21:13,406 INFO L125 PetriNetUnfolderBase]: For 343933/343933 co-relation queries the response was YES. [2024-06-20 15:21:13,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34946 conditions, 5194 events. 3059/5194 cut-off events. For 343933/343933 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 35095 event pairs, 661 based on Foata normal form. 1/5187 useless extension candidates. Maximal degree in co-relation 34799. Up to 4611 conditions per place. [2024-06-20 15:21:13,478 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 290 selfloop transitions, 88 changer transitions 0/386 dead transitions. [2024-06-20 15:21:13,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 386 transitions, 5549 flow [2024-06-20 15:21:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:13,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:13,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:21:13,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:21:13,479 INFO L175 Difference]: Start difference. First operand has 316 places, 372 transitions, 4759 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:21:13,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 386 transitions, 5549 flow [2024-06-20 15:21:14,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 386 transitions, 5417 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:14,722 INFO L231 Difference]: Finished difference. Result has 316 places, 372 transitions, 4814 flow [2024-06-20 15:21:14,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4627, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4814, PETRI_PLACES=316, PETRI_TRANSITIONS=372} [2024-06-20 15:21:14,723 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 15:21:14,723 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 372 transitions, 4814 flow [2024-06-20 15:21:14,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:14,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:14,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:14,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:21:14,723 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:14,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:14,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1203568795, now seen corresponding path program 1 times [2024-06-20 15:21:14,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:14,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427672591] [2024-06-20 15:21:14,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:14,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:14,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:14,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:14,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:14,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427672591] [2024-06-20 15:21:14,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427672591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:14,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:14,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:14,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992339400] [2024-06-20 15:21:14,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:14,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:14,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:14,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:14,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:14,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:14,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 372 transitions, 4814 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:14,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:14,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:14,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:15,686 INFO L124 PetriNetUnfolderBase]: 3087/5246 cut-off events. [2024-06-20 15:21:15,687 INFO L125 PetriNetUnfolderBase]: For 368687/368687 co-relation queries the response was YES. [2024-06-20 15:21:15,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35343 conditions, 5246 events. 3087/5246 cut-off events. For 368687/368687 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35503 event pairs, 565 based on Foata normal form. 6/5244 useless extension candidates. Maximal degree in co-relation 35195. Up to 4526 conditions per place. [2024-06-20 15:21:15,759 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 360 selfloop transitions, 30 changer transitions 0/398 dead transitions. [2024-06-20 15:21:15,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 398 transitions, 5901 flow [2024-06-20 15:21:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:21:15,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:21:15,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:21:15,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:21:15,760 INFO L175 Difference]: Start difference. First operand has 316 places, 372 transitions, 4814 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:21:15,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 398 transitions, 5901 flow [2024-06-20 15:21:17,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 398 transitions, 5657 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:17,026 INFO L231 Difference]: Finished difference. Result has 316 places, 375 transitions, 4674 flow [2024-06-20 15:21:17,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4674, PETRI_PLACES=316, PETRI_TRANSITIONS=375} [2024-06-20 15:21:17,027 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 15:21:17,027 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 375 transitions, 4674 flow [2024-06-20 15:21:17,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:17,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:17,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:17,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:21:17,027 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:17,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash -707157171, now seen corresponding path program 2 times [2024-06-20 15:21:17,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:17,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153594213] [2024-06-20 15:21:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:17,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:17,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:17,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153594213] [2024-06-20 15:21:17,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153594213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:17,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:17,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:17,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926564628] [2024-06-20 15:21:17,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:17,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:17,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:17,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:17,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:17,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:17,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 375 transitions, 4674 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:17,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:17,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:17,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:18,005 INFO L124 PetriNetUnfolderBase]: 3074/5227 cut-off events. [2024-06-20 15:21:18,006 INFO L125 PetriNetUnfolderBase]: For 349512/349512 co-relation queries the response was YES. [2024-06-20 15:21:18,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34690 conditions, 5227 events. 3074/5227 cut-off events. For 349512/349512 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 35368 event pairs, 554 based on Foata normal form. 6/5225 useless extension candidates. Maximal degree in co-relation 34541. Up to 4520 conditions per place. [2024-06-20 15:21:18,073 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 357 selfloop transitions, 30 changer transitions 0/395 dead transitions. [2024-06-20 15:21:18,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 395 transitions, 5556 flow [2024-06-20 15:21:18,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:21:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:21:18,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-20 15:21:18,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2024-06-20 15:21:18,076 INFO L175 Difference]: Start difference. First operand has 316 places, 375 transitions, 4674 flow. Second operand 5 states and 129 transitions. [2024-06-20 15:21:18,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 395 transitions, 5556 flow [2024-06-20 15:21:19,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 395 transitions, 5489 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-20 15:21:19,265 INFO L231 Difference]: Finished difference. Result has 318 places, 375 transitions, 4673 flow [2024-06-20 15:21:19,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4673, PETRI_PLACES=318, PETRI_TRANSITIONS=375} [2024-06-20 15:21:19,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-20 15:21:19,266 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 375 transitions, 4673 flow [2024-06-20 15:21:19,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:19,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:19,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:19,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:21:19,266 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:19,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1794771689, now seen corresponding path program 4 times [2024-06-20 15:21:19,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:19,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602066607] [2024-06-20 15:21:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:19,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:19,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:19,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:19,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602066607] [2024-06-20 15:21:19,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602066607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:19,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:19,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:19,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706329716] [2024-06-20 15:21:19,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:19,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:19,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:19,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:19,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:19,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:19,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 375 transitions, 4673 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:19,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:19,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:19,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:20,413 INFO L124 PetriNetUnfolderBase]: 3119/5304 cut-off events. [2024-06-20 15:21:20,414 INFO L125 PetriNetUnfolderBase]: For 359089/359092 co-relation queries the response was YES. [2024-06-20 15:21:20,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35672 conditions, 5304 events. 3119/5304 cut-off events. For 359089/359092 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35963 event pairs, 679 based on Foata normal form. 1/5290 useless extension candidates. Maximal degree in co-relation 35523. Up to 4302 conditions per place. [2024-06-20 15:21:20,480 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 234 selfloop transitions, 182 changer transitions 0/424 dead transitions. [2024-06-20 15:21:20,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 424 transitions, 6587 flow [2024-06-20 15:21:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:20,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-20 15:21:20,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6432926829268293 [2024-06-20 15:21:20,482 INFO L175 Difference]: Start difference. First operand has 318 places, 375 transitions, 4673 flow. Second operand 8 states and 211 transitions. [2024-06-20 15:21:20,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 424 transitions, 6587 flow [2024-06-20 15:21:21,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 424 transitions, 6496 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:21,667 INFO L231 Difference]: Finished difference. Result has 321 places, 393 transitions, 5326 flow [2024-06-20 15:21:21,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4590, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5326, PETRI_PLACES=321, PETRI_TRANSITIONS=393} [2024-06-20 15:21:21,668 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-20 15:21:21,668 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 393 transitions, 5326 flow [2024-06-20 15:21:21,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:21,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:21,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:21,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:21:21,668 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:21,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:21,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1285311543, now seen corresponding path program 5 times [2024-06-20 15:21:21,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:21,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445531589] [2024-06-20 15:21:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:21,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:21,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:21,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:21,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445531589] [2024-06-20 15:21:21,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445531589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:21,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:21,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:21,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642598247] [2024-06-20 15:21:21,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:21,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:21,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:21,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:21,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:21,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:21,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 393 transitions, 5326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:21,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:21,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:21,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:22,781 INFO L124 PetriNetUnfolderBase]: 3132/5322 cut-off events. [2024-06-20 15:21:22,781 INFO L125 PetriNetUnfolderBase]: For 367345/367348 co-relation queries the response was YES. [2024-06-20 15:21:22,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36880 conditions, 5322 events. 3132/5322 cut-off events. For 367345/367348 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36094 event pairs, 679 based on Foata normal form. 1/5308 useless extension candidates. Maximal degree in co-relation 36731. Up to 4312 conditions per place. [2024-06-20 15:21:22,855 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 187 changer transitions 0/427 dead transitions. [2024-06-20 15:21:22,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 427 transitions, 7028 flow [2024-06-20 15:21:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:22,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:21:22,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-20 15:21:22,856 INFO L175 Difference]: Start difference. First operand has 321 places, 393 transitions, 5326 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:21:22,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 427 transitions, 7028 flow [2024-06-20 15:21:24,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 427 transitions, 6774 flow, removed 111 selfloop flow, removed 1 redundant places. [2024-06-20 15:21:24,127 INFO L231 Difference]: Finished difference. Result has 328 places, 399 transitions, 5600 flow [2024-06-20 15:21:24,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5130, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5600, PETRI_PLACES=328, PETRI_TRANSITIONS=399} [2024-06-20 15:21:24,128 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-20 15:21:24,128 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 399 transitions, 5600 flow [2024-06-20 15:21:24,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:24,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:24,128 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] [2024-06-20 15:21:24,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:21:24,128 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:24,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:24,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1766211147, now seen corresponding path program 6 times [2024-06-20 15:21:24,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:24,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429830894] [2024-06-20 15:21:24,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:24,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:24,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:24,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:24,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429830894] [2024-06-20 15:21:24,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429830894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:24,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:24,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:24,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041803812] [2024-06-20 15:21:24,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:24,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:24,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:24,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:24,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:24,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:24,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 399 transitions, 5600 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:24,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:24,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:24,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:25,149 INFO L124 PetriNetUnfolderBase]: 3129/5318 cut-off events. [2024-06-20 15:21:25,150 INFO L125 PetriNetUnfolderBase]: For 366891/366894 co-relation queries the response was YES. [2024-06-20 15:21:25,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36475 conditions, 5318 events. 3129/5318 cut-off events. For 366891/366894 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 36095 event pairs, 679 based on Foata normal form. 1/5304 useless extension candidates. Maximal degree in co-relation 36323. Up to 4310 conditions per place. [2024-06-20 15:21:25,339 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 239 selfloop transitions, 184 changer transitions 0/431 dead transitions. [2024-06-20 15:21:25,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 431 transitions, 7344 flow [2024-06-20 15:21:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:25,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-20 15:21:25,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.649390243902439 [2024-06-20 15:21:25,340 INFO L175 Difference]: Start difference. First operand has 328 places, 399 transitions, 5600 flow. Second operand 8 states and 213 transitions. [2024-06-20 15:21:25,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 431 transitions, 7344 flow [2024-06-20 15:21:26,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 431 transitions, 6978 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:26,780 INFO L231 Difference]: Finished difference. Result has 332 places, 399 transitions, 5608 flow [2024-06-20 15:21:26,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5234, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5608, PETRI_PLACES=332, PETRI_TRANSITIONS=399} [2024-06-20 15:21:26,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 15:21:26,781 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 399 transitions, 5608 flow [2024-06-20 15:21:26,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:26,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:26,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:26,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:21:26,782 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:26,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1290852483, now seen corresponding path program 7 times [2024-06-20 15:21:26,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:26,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148528196] [2024-06-20 15:21:26,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:26,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:26,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:26,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:26,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148528196] [2024-06-20 15:21:26,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148528196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:26,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:26,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:26,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193849237] [2024-06-20 15:21:26,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:26,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:26,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:26,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:26,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 399 transitions, 5608 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:26,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:26,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:26,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:27,823 INFO L124 PetriNetUnfolderBase]: 3139/5353 cut-off events. [2024-06-20 15:21:27,824 INFO L125 PetriNetUnfolderBase]: For 375006/375009 co-relation queries the response was YES. [2024-06-20 15:21:27,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36691 conditions, 5353 events. 3139/5353 cut-off events. For 375006/375009 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 36494 event pairs, 671 based on Foata normal form. 3/5346 useless extension candidates. Maximal degree in co-relation 36538. Up to 4664 conditions per place. [2024-06-20 15:21:27,899 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 101 changer transitions 0/430 dead transitions. [2024-06-20 15:21:27,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 430 transitions, 6772 flow [2024-06-20 15:21:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:21:27,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:21:27,901 INFO L175 Difference]: Start difference. First operand has 332 places, 399 transitions, 5608 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:21:27,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 430 transitions, 6772 flow [2024-06-20 15:21:29,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 430 transitions, 6285 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 15:21:29,596 INFO L231 Difference]: Finished difference. Result has 332 places, 405 transitions, 5427 flow [2024-06-20 15:21:29,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5427, PETRI_PLACES=332, PETRI_TRANSITIONS=405} [2024-06-20 15:21:29,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-20 15:21:29,597 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 405 transitions, 5427 flow [2024-06-20 15:21:29,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:29,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:29,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:29,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:21:29,598 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:29,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:29,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1542172991, now seen corresponding path program 4 times [2024-06-20 15:21:29,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:29,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616874080] [2024-06-20 15:21:29,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:29,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:29,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:29,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:29,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616874080] [2024-06-20 15:21:29,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616874080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:29,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:29,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:29,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060605462] [2024-06-20 15:21:29,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:29,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:29,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 405 transitions, 5427 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:29,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:29,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:29,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:30,593 INFO L124 PetriNetUnfolderBase]: 3149/5351 cut-off events. [2024-06-20 15:21:30,593 INFO L125 PetriNetUnfolderBase]: For 381771/381771 co-relation queries the response was YES. [2024-06-20 15:21:30,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36473 conditions, 5351 events. 3149/5351 cut-off events. For 381771/381771 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 36461 event pairs, 663 based on Foata normal form. 1/5344 useless extension candidates. Maximal degree in co-relation 36320. Up to 4677 conditions per place. [2024-06-20 15:21:30,667 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 329 selfloop transitions, 92 changer transitions 0/429 dead transitions. [2024-06-20 15:21:30,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 429 transitions, 6556 flow [2024-06-20 15:21:30,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:21:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:21:30,669 INFO L175 Difference]: Start difference. First operand has 332 places, 405 transitions, 5427 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:21:30,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 429 transitions, 6556 flow [2024-06-20 15:21:32,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 429 transitions, 6318 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:32,444 INFO L231 Difference]: Finished difference. Result has 335 places, 411 transitions, 5465 flow [2024-06-20 15:21:32,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5201, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5465, PETRI_PLACES=335, PETRI_TRANSITIONS=411} [2024-06-20 15:21:32,445 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 293 predicate places. [2024-06-20 15:21:32,445 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 411 transitions, 5465 flow [2024-06-20 15:21:32,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:32,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:32,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:32,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:21:32,446 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:32,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:32,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1920331175, now seen corresponding path program 5 times [2024-06-20 15:21:32,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:32,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461311366] [2024-06-20 15:21:32,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:32,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:32,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:32,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:32,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:32,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461311366] [2024-06-20 15:21:32,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461311366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:32,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:32,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:32,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531850345] [2024-06-20 15:21:32,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:32,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:32,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:32,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:32,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:32,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:32,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 411 transitions, 5465 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:32,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:32,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:32,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:33,434 INFO L124 PetriNetUnfolderBase]: 3177/5400 cut-off events. [2024-06-20 15:21:33,434 INFO L125 PetriNetUnfolderBase]: For 393859/393859 co-relation queries the response was YES. [2024-06-20 15:21:33,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36888 conditions, 5400 events. 3177/5400 cut-off events. For 393859/393859 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 36864 event pairs, 663 based on Foata normal form. 1/5393 useless extension candidates. Maximal degree in co-relation 36733. Up to 4706 conditions per place. [2024-06-20 15:21:33,508 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 332 selfloop transitions, 100 changer transitions 0/440 dead transitions. [2024-06-20 15:21:33,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 440 transitions, 6867 flow [2024-06-20 15:21:33,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:33,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:33,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:21:33,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:21:33,509 INFO L175 Difference]: Start difference. First operand has 335 places, 411 transitions, 5465 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:21:33,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 440 transitions, 6867 flow [2024-06-20 15:21:35,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 440 transitions, 6601 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:35,128 INFO L231 Difference]: Finished difference. Result has 339 places, 424 transitions, 5584 flow [2024-06-20 15:21:35,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5230, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5584, PETRI_PLACES=339, PETRI_TRANSITIONS=424} [2024-06-20 15:21:35,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-20 15:21:35,129 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 424 transitions, 5584 flow [2024-06-20 15:21:35,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:35,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:35,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:35,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:21:35,130 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:35,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash 698538039, now seen corresponding path program 8 times [2024-06-20 15:21:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:35,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023934249] [2024-06-20 15:21:35,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:35,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023934249] [2024-06-20 15:21:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023934249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:35,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863781571] [2024-06-20 15:21:35,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:35,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:35,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:35,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 424 transitions, 5584 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:35,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:35,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:35,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:36,213 INFO L124 PetriNetUnfolderBase]: 3190/5425 cut-off events. [2024-06-20 15:21:36,213 INFO L125 PetriNetUnfolderBase]: For 406862/406865 co-relation queries the response was YES. [2024-06-20 15:21:36,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37031 conditions, 5425 events. 3190/5425 cut-off events. For 406862/406865 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37001 event pairs, 662 based on Foata normal form. 3/5417 useless extension candidates. Maximal degree in co-relation 36875. Up to 4708 conditions per place. [2024-06-20 15:21:36,406 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 316 selfloop transitions, 131 changer transitions 0/455 dead transitions. [2024-06-20 15:21:36,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 455 transitions, 6970 flow [2024-06-20 15:21:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:21:36,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:21:36,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-20 15:21:36,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-20 15:21:36,407 INFO L175 Difference]: Start difference. First operand has 339 places, 424 transitions, 5584 flow. Second operand 10 states and 236 transitions. [2024-06-20 15:21:36,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 455 transitions, 6970 flow [2024-06-20 15:21:38,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 455 transitions, 6826 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-20 15:21:38,198 INFO L231 Difference]: Finished difference. Result has 347 places, 430 transitions, 5812 flow [2024-06-20 15:21:38,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5812, PETRI_PLACES=347, PETRI_TRANSITIONS=430} [2024-06-20 15:21:38,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-20 15:21:38,199 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 430 transitions, 5812 flow [2024-06-20 15:21:38,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:38,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:38,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:38,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:21:38,200 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:38,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:38,200 INFO L85 PathProgramCache]: Analyzing trace with hash -965903973, now seen corresponding path program 9 times [2024-06-20 15:21:38,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:38,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877023152] [2024-06-20 15:21:38,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:38,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:38,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:38,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:38,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:38,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877023152] [2024-06-20 15:21:38,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877023152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:38,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:38,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:38,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649800406] [2024-06-20 15:21:38,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:38,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:38,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:38,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:38,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:38,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:38,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 430 transitions, 5812 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:38,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:38,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:38,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:39,257 INFO L124 PetriNetUnfolderBase]: 3187/5433 cut-off events. [2024-06-20 15:21:39,257 INFO L125 PetriNetUnfolderBase]: For 411643/411646 co-relation queries the response was YES. [2024-06-20 15:21:39,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37167 conditions, 5433 events. 3187/5433 cut-off events. For 411643/411646 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37130 event pairs, 672 based on Foata normal form. 3/5425 useless extension candidates. Maximal degree in co-relation 37009. Up to 4705 conditions per place. [2024-06-20 15:21:39,333 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 130 changer transitions 0/452 dead transitions. [2024-06-20 15:21:39,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 452 transitions, 6928 flow [2024-06-20 15:21:39,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:21:39,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:21:39,335 INFO L175 Difference]: Start difference. First operand has 347 places, 430 transitions, 5812 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:21:39,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 452 transitions, 6928 flow [2024-06-20 15:21:41,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 452 transitions, 6648 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 15:21:41,346 INFO L231 Difference]: Finished difference. Result has 350 places, 430 transitions, 5798 flow [2024-06-20 15:21:41,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5532, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5798, PETRI_PLACES=350, PETRI_TRANSITIONS=430} [2024-06-20 15:21:41,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-20 15:21:41,346 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 430 transitions, 5798 flow [2024-06-20 15:21:41,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:41,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:41,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:41,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:21:41,347 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:41,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash -54270463, now seen corresponding path program 6 times [2024-06-20 15:21:41,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:41,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786284564] [2024-06-20 15:21:41,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:41,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:41,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:41,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786284564] [2024-06-20 15:21:41,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786284564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:41,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:41,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416527814] [2024-06-20 15:21:41,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:41,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:41,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:41,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:41,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:41,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 430 transitions, 5798 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:41,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:41,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:41,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:42,447 INFO L124 PetriNetUnfolderBase]: 3184/5426 cut-off events. [2024-06-20 15:21:42,448 INFO L125 PetriNetUnfolderBase]: For 415801/415801 co-relation queries the response was YES. [2024-06-20 15:21:42,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37125 conditions, 5426 events. 3184/5426 cut-off events. For 415801/415801 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 37126 event pairs, 673 based on Foata normal form. 1/5419 useless extension candidates. Maximal degree in co-relation 36966. Up to 4717 conditions per place. [2024-06-20 15:21:42,519 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 332 selfloop transitions, 105 changer transitions 0/445 dead transitions. [2024-06-20 15:21:42,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 445 transitions, 6884 flow [2024-06-20 15:21:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:21:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:21:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-20 15:21:42,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-20 15:21:42,521 INFO L175 Difference]: Start difference. First operand has 350 places, 430 transitions, 5798 flow. Second operand 7 states and 171 transitions. [2024-06-20 15:21:42,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 445 transitions, 6884 flow [2024-06-20 15:21:44,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 445 transitions, 6616 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:21:44,499 INFO L231 Difference]: Finished difference. Result has 350 places, 430 transitions, 5746 flow [2024-06-20 15:21:44,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5746, PETRI_PLACES=350, PETRI_TRANSITIONS=430} [2024-06-20 15:21:44,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-20 15:21:44,500 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 430 transitions, 5746 flow [2024-06-20 15:21:44,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:44,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:44,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:44,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:21:44,500 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:44,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash 579696861, now seen corresponding path program 7 times [2024-06-20 15:21:44,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:44,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565290204] [2024-06-20 15:21:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:44,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:44,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:44,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565290204] [2024-06-20 15:21:44,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565290204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:44,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:44,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:44,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328975035] [2024-06-20 15:21:44,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:44,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:44,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:44,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:44,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:44,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:44,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 430 transitions, 5746 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:44,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:44,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:44,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:45,599 INFO L124 PetriNetUnfolderBase]: 3189/5436 cut-off events. [2024-06-20 15:21:45,599 INFO L125 PetriNetUnfolderBase]: For 426401/426404 co-relation queries the response was YES. [2024-06-20 15:21:45,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37209 conditions, 5436 events. 3189/5436 cut-off events. For 426401/426404 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 37317 event pairs, 718 based on Foata normal form. 3/5428 useless extension candidates. Maximal degree in co-relation 37049. Up to 4723 conditions per place. [2024-06-20 15:21:45,674 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 326 selfloop transitions, 110 changer transitions 0/444 dead transitions. [2024-06-20 15:21:45,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 444 transitions, 6861 flow [2024-06-20 15:21:45,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:21:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:21:45,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:21:45,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:21:45,676 INFO L175 Difference]: Start difference. First operand has 350 places, 430 transitions, 5746 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:21:45,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 444 transitions, 6861 flow [2024-06-20 15:21:47,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 444 transitions, 6681 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:47,600 INFO L231 Difference]: Finished difference. Result has 352 places, 433 transitions, 5831 flow [2024-06-20 15:21:47,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5572, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5831, PETRI_PLACES=352, PETRI_TRANSITIONS=433} [2024-06-20 15:21:47,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-20 15:21:47,601 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 433 transitions, 5831 flow [2024-06-20 15:21:47,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:47,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:47,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:47,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:21:47,601 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:47,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:47,602 INFO L85 PathProgramCache]: Analyzing trace with hash 203799975, now seen corresponding path program 10 times [2024-06-20 15:21:47,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:47,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920689501] [2024-06-20 15:21:47,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:47,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:47,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:47,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:47,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920689501] [2024-06-20 15:21:47,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920689501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:47,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:47,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:47,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438838666] [2024-06-20 15:21:47,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:47,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:47,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:47,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:47,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:47,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:47,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 433 transitions, 5831 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:47,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:47,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:48,712 INFO L124 PetriNetUnfolderBase]: 3204/5456 cut-off events. [2024-06-20 15:21:48,712 INFO L125 PetriNetUnfolderBase]: For 434296/434296 co-relation queries the response was YES. [2024-06-20 15:21:48,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37500 conditions, 5456 events. 3204/5456 cut-off events. For 434296/434296 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 37253 event pairs, 643 based on Foata normal form. 1/5453 useless extension candidates. Maximal degree in co-relation 37339. Up to 4928 conditions per place. [2024-06-20 15:21:48,789 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 414 selfloop transitions, 38 changer transitions 0/460 dead transitions. [2024-06-20 15:21:48,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 460 transitions, 6924 flow [2024-06-20 15:21:48,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:21:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:21:48,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:21:48,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 15:21:48,790 INFO L175 Difference]: Start difference. First operand has 352 places, 433 transitions, 5831 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:21:48,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 460 transitions, 6924 flow [2024-06-20 15:21:50,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 460 transitions, 6677 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:50,599 INFO L231 Difference]: Finished difference. Result has 357 places, 442 transitions, 5827 flow [2024-06-20 15:21:50,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5594, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5827, PETRI_PLACES=357, PETRI_TRANSITIONS=442} [2024-06-20 15:21:50,600 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-20 15:21:50,600 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 442 transitions, 5827 flow [2024-06-20 15:21:50,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:50,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:50,600 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:50,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:21:50,601 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:50,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1485777575, now seen corresponding path program 11 times [2024-06-20 15:21:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:50,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483789269] [2024-06-20 15:21:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:50,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:50,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:50,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:50,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483789269] [2024-06-20 15:21:50,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483789269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:50,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:50,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:50,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521803132] [2024-06-20 15:21:50,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:50,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:50,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:50,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:50,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:50,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:50,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 442 transitions, 5827 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:50,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:50,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:50,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:51,676 INFO L124 PetriNetUnfolderBase]: 3235/5504 cut-off events. [2024-06-20 15:21:51,677 INFO L125 PetriNetUnfolderBase]: For 451847/451850 co-relation queries the response was YES. [2024-06-20 15:21:51,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37952 conditions, 5504 events. 3235/5504 cut-off events. For 451847/451850 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 37689 event pairs, 663 based on Foata normal form. 3/5496 useless extension candidates. Maximal degree in co-relation 37790. Up to 4731 conditions per place. [2024-06-20 15:21:51,757 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 164 changer transitions 0/479 dead transitions. [2024-06-20 15:21:51,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 479 transitions, 7598 flow [2024-06-20 15:21:51,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:21:51,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:21:51,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:21:51,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:21:51,758 INFO L175 Difference]: Start difference. First operand has 357 places, 442 transitions, 5827 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:21:51,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 479 transitions, 7598 flow [2024-06-20 15:21:53,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 479 transitions, 7497 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-20 15:21:53,859 INFO L231 Difference]: Finished difference. Result has 365 places, 457 transitions, 6351 flow [2024-06-20 15:21:53,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5726, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6351, PETRI_PLACES=365, PETRI_TRANSITIONS=457} [2024-06-20 15:21:53,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-20 15:21:53,859 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 457 transitions, 6351 flow [2024-06-20 15:21:53,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:53,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:53,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:53,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:21:53,860 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:53,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:53,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1973770923, now seen corresponding path program 8 times [2024-06-20 15:21:53,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:53,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593197417] [2024-06-20 15:21:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:53,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:53,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:53,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:53,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593197417] [2024-06-20 15:21:53,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593197417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:53,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:53,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:21:53,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874036274] [2024-06-20 15:21:53,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:53,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:21:53,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:53,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:21:53,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:21:53,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:53,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 457 transitions, 6351 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:53,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:53,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:53,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:54,863 INFO L124 PetriNetUnfolderBase]: 3240/5510 cut-off events. [2024-06-20 15:21:54,863 INFO L125 PetriNetUnfolderBase]: For 462128/462128 co-relation queries the response was YES. [2024-06-20 15:21:54,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38474 conditions, 5510 events. 3240/5510 cut-off events. For 462128/462128 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37789 event pairs, 664 based on Foata normal form. 1/5503 useless extension candidates. Maximal degree in co-relation 38310. Up to 4779 conditions per place. [2024-06-20 15:21:54,943 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 340 selfloop transitions, 126 changer transitions 0/474 dead transitions. [2024-06-20 15:21:54,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 474 transitions, 7540 flow [2024-06-20 15:21:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:21:54,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:21:54,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:21:54,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:21:54,944 INFO L175 Difference]: Start difference. First operand has 365 places, 457 transitions, 6351 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:21:54,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 474 transitions, 7540 flow [2024-06-20 15:21:57,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 474 transitions, 7277 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-20 15:21:57,577 INFO L231 Difference]: Finished difference. Result has 367 places, 460 transitions, 6389 flow [2024-06-20 15:21:57,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6094, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6389, PETRI_PLACES=367, PETRI_TRANSITIONS=460} [2024-06-20 15:21:57,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-20 15:21:57,578 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 460 transitions, 6389 flow [2024-06-20 15:21:57,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:57,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:21:57,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:21:57,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:21:57,579 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:21:57,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:21:57,579 INFO L85 PathProgramCache]: Analyzing trace with hash -673804435, now seen corresponding path program 12 times [2024-06-20 15:21:57,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:21:57,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743841932] [2024-06-20 15:21:57,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:21:57,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:21:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:21:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:21:57,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:21:57,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743841932] [2024-06-20 15:21:57,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743841932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:21:57,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:21:57,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:21:57,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688130014] [2024-06-20 15:21:57,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:21:57,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:21:57,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:21:57,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:21:57,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:21:57,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:21:57,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 460 transitions, 6389 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:21:57,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:21:57,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:21:57,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:21:58,719 INFO L124 PetriNetUnfolderBase]: 3237/5508 cut-off events. [2024-06-20 15:21:58,719 INFO L125 PetriNetUnfolderBase]: For 467913/467916 co-relation queries the response was YES. [2024-06-20 15:21:58,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38353 conditions, 5508 events. 3237/5508 cut-off events. For 467913/467916 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37682 event pairs, 664 based on Foata normal form. 3/5499 useless extension candidates. Maximal degree in co-relation 38190. Up to 4734 conditions per place. [2024-06-20 15:21:58,797 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 307 selfloop transitions, 168 changer transitions 0/483 dead transitions. [2024-06-20 15:21:58,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 483 transitions, 7765 flow [2024-06-20 15:21:58,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:21:58,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:21:58,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-20 15:21:58,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-20 15:21:58,798 INFO L175 Difference]: Start difference. First operand has 367 places, 460 transitions, 6389 flow. Second operand 11 states and 252 transitions. [2024-06-20 15:21:58,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 483 transitions, 7765 flow [2024-06-20 15:22:00,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 483 transitions, 7366 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:00,814 INFO L231 Difference]: Finished difference. Result has 372 places, 460 transitions, 6336 flow [2024-06-20 15:22:00,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5994, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6336, PETRI_PLACES=372, PETRI_TRANSITIONS=460} [2024-06-20 15:22:00,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-20 15:22:00,815 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 460 transitions, 6336 flow [2024-06-20 15:22:00,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:00,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:00,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:00,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:22:00,815 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:00,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1654827327, now seen corresponding path program 9 times [2024-06-20 15:22:00,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:00,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336710702] [2024-06-20 15:22:00,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:00,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336710702] [2024-06-20 15:22:00,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336710702] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:00,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:00,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:22:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100434495] [2024-06-20 15:22:00,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:00,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:22:00,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:22:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:22:00,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:00,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 460 transitions, 6336 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:00,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:00,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:00,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:01,870 INFO L124 PetriNetUnfolderBase]: 3234/5502 cut-off events. [2024-06-20 15:22:01,870 INFO L125 PetriNetUnfolderBase]: For 462398/462398 co-relation queries the response was YES. [2024-06-20 15:22:01,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38218 conditions, 5502 events. 3234/5502 cut-off events. For 462398/462398 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 37747 event pairs, 664 based on Foata normal form. 1/5495 useless extension candidates. Maximal degree in co-relation 38055. Up to 4772 conditions per place. [2024-06-20 15:22:01,947 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 347 selfloop transitions, 121 changer transitions 0/476 dead transitions. [2024-06-20 15:22:01,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 476 transitions, 7312 flow [2024-06-20 15:22:01,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:22:01,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:22:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-20 15:22:01,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-20 15:22:01,948 INFO L175 Difference]: Start difference. First operand has 372 places, 460 transitions, 6336 flow. Second operand 6 states and 151 transitions. [2024-06-20 15:22:01,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 476 transitions, 7312 flow [2024-06-20 15:22:04,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 476 transitions, 6946 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:22:04,275 INFO L231 Difference]: Finished difference. Result has 368 places, 460 transitions, 6231 flow [2024-06-20 15:22:04,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6231, PETRI_PLACES=368, PETRI_TRANSITIONS=460} [2024-06-20 15:22:04,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-20 15:22:04,276 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 460 transitions, 6231 flow [2024-06-20 15:22:04,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:04,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:04,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:04,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:22:04,276 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:04,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:04,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1462443269, now seen corresponding path program 1 times [2024-06-20 15:22:04,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:04,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483376856] [2024-06-20 15:22:04,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:04,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:04,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:04,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483376856] [2024-06-20 15:22:04,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483376856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:04,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:04,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:04,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925035359] [2024-06-20 15:22:04,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:04,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:04,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:04,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:04,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:04,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:04,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 460 transitions, 6231 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:04,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:04,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:04,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:05,515 INFO L124 PetriNetUnfolderBase]: 3327/5641 cut-off events. [2024-06-20 15:22:05,515 INFO L125 PetriNetUnfolderBase]: For 542359/542362 co-relation queries the response was YES. [2024-06-20 15:22:05,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40928 conditions, 5641 events. 3327/5641 cut-off events. For 542359/542362 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38680 event pairs, 682 based on Foata normal form. 2/5622 useless extension candidates. Maximal degree in co-relation 40764. Up to 4799 conditions per place. [2024-06-20 15:22:05,588 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 355 selfloop transitions, 138 changer transitions 0/501 dead transitions. [2024-06-20 15:22:05,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 501 transitions, 7740 flow [2024-06-20 15:22:05,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:05,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:05,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:22:05,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 15:22:05,589 INFO L175 Difference]: Start difference. First operand has 368 places, 460 transitions, 6231 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:22:05,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 501 transitions, 7740 flow [2024-06-20 15:22:07,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 501 transitions, 7453 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:07,608 INFO L231 Difference]: Finished difference. Result has 370 places, 468 transitions, 6488 flow [2024-06-20 15:22:07,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5948, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6488, PETRI_PLACES=370, PETRI_TRANSITIONS=468} [2024-06-20 15:22:07,608 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-20 15:22:07,609 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 468 transitions, 6488 flow [2024-06-20 15:22:07,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:07,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:07,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:07,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:22:07,610 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:07,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:07,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1163063193, now seen corresponding path program 2 times [2024-06-20 15:22:07,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:07,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443773113] [2024-06-20 15:22:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:07,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:07,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:07,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:07,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:07,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443773113] [2024-06-20 15:22:07,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443773113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:07,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:07,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:07,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565119408] [2024-06-20 15:22:07,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:07,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:07,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:07,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:07,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:07,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:07,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 468 transitions, 6488 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:07,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:07,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:07,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:08,749 INFO L124 PetriNetUnfolderBase]: 3322/5640 cut-off events. [2024-06-20 15:22:08,749 INFO L125 PetriNetUnfolderBase]: For 524929/524932 co-relation queries the response was YES. [2024-06-20 15:22:08,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40865 conditions, 5640 events. 3322/5640 cut-off events. For 524929/524932 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38716 event pairs, 689 based on Foata normal form. 2/5630 useless extension candidates. Maximal degree in co-relation 40701. Up to 4891 conditions per place. [2024-06-20 15:22:08,831 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 354 selfloop transitions, 131 changer transitions 0/493 dead transitions. [2024-06-20 15:22:08,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 493 transitions, 7520 flow [2024-06-20 15:22:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:08,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:08,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:22:08,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:22:08,832 INFO L175 Difference]: Start difference. First operand has 370 places, 468 transitions, 6488 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:22:08,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 493 transitions, 7520 flow [2024-06-20 15:22:11,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 493 transitions, 7219 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:11,289 INFO L231 Difference]: Finished difference. Result has 373 places, 468 transitions, 6454 flow [2024-06-20 15:22:11,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6454, PETRI_PLACES=373, PETRI_TRANSITIONS=468} [2024-06-20 15:22:11,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-20 15:22:11,289 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 468 transitions, 6454 flow [2024-06-20 15:22:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:11,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:11,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:11,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:22:11,290 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:11,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:11,291 INFO L85 PathProgramCache]: Analyzing trace with hash -965896037, now seen corresponding path program 3 times [2024-06-20 15:22:11,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:11,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547009443] [2024-06-20 15:22:11,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:11,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:11,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:11,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:11,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547009443] [2024-06-20 15:22:11,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547009443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:11,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:11,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:11,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345133798] [2024-06-20 15:22:11,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:11,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:11,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:11,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:11,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:11,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:11,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 468 transitions, 6454 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:11,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:11,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:11,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:12,575 INFO L124 PetriNetUnfolderBase]: 3317/5637 cut-off events. [2024-06-20 15:22:12,576 INFO L125 PetriNetUnfolderBase]: For 525822/525825 co-relation queries the response was YES. [2024-06-20 15:22:12,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40587 conditions, 5637 events. 3317/5637 cut-off events. For 525822/525825 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 38627 event pairs, 669 based on Foata normal form. 4/5633 useless extension candidates. Maximal degree in co-relation 40422. Up to 5040 conditions per place. [2024-06-20 15:22:12,646 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 418 selfloop transitions, 64 changer transitions 0/490 dead transitions. [2024-06-20 15:22:12,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 490 transitions, 7472 flow [2024-06-20 15:22:12,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:12,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:12,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:22:12,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:22:12,648 INFO L175 Difference]: Start difference. First operand has 373 places, 468 transitions, 6454 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:22:12,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 490 transitions, 7472 flow [2024-06-20 15:22:14,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 490 transitions, 7173 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:14,860 INFO L231 Difference]: Finished difference. Result has 375 places, 468 transitions, 6288 flow [2024-06-20 15:22:14,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6288, PETRI_PLACES=375, PETRI_TRANSITIONS=468} [2024-06-20 15:22:14,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-20 15:22:14,861 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 468 transitions, 6288 flow [2024-06-20 15:22:14,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:14,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:14,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:14,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:22:14,862 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:14,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:14,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1753770139, now seen corresponding path program 4 times [2024-06-20 15:22:14,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:14,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109425019] [2024-06-20 15:22:14,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:14,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:14,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:14,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109425019] [2024-06-20 15:22:14,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109425019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:14,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:14,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:14,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849777283] [2024-06-20 15:22:14,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:14,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:14,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:14,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:14,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:15,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:15,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 468 transitions, 6288 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:15,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:15,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:15,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:16,075 INFO L124 PetriNetUnfolderBase]: 3325/5645 cut-off events. [2024-06-20 15:22:16,075 INFO L125 PetriNetUnfolderBase]: For 536207/536210 co-relation queries the response was YES. [2024-06-20 15:22:16,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40584 conditions, 5645 events. 3325/5645 cut-off events. For 536207/536210 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 38688 event pairs, 667 based on Foata normal form. 4/5641 useless extension candidates. Maximal degree in co-relation 40418. Up to 5046 conditions per place. [2024-06-20 15:22:16,157 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 412 selfloop transitions, 70 changer transitions 0/490 dead transitions. [2024-06-20 15:22:16,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 490 transitions, 7367 flow [2024-06-20 15:22:16,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:22:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:22:16,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-20 15:22:16,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-20 15:22:16,158 INFO L175 Difference]: Start difference. First operand has 375 places, 468 transitions, 6288 flow. Second operand 9 states and 206 transitions. [2024-06-20 15:22:16,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 490 transitions, 7367 flow [2024-06-20 15:22:18,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 490 transitions, 7198 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:18,670 INFO L231 Difference]: Finished difference. Result has 378 places, 470 transitions, 6335 flow [2024-06-20 15:22:18,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6335, PETRI_PLACES=378, PETRI_TRANSITIONS=470} [2024-06-20 15:22:18,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 15:22:18,671 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 470 transitions, 6335 flow [2024-06-20 15:22:18,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:18,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:18,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:18,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 15:22:18,673 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:18,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:18,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1012278561, now seen corresponding path program 13 times [2024-06-20 15:22:18,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:18,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568403127] [2024-06-20 15:22:18,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:18,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:18,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:18,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:18,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568403127] [2024-06-20 15:22:18,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568403127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:18,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:18,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:18,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699694184] [2024-06-20 15:22:18,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:18,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:18,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:18,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:18,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:18,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:18,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 470 transitions, 6335 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:18,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:18,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:18,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:19,969 INFO L124 PetriNetUnfolderBase]: 3346/5672 cut-off events. [2024-06-20 15:22:19,969 INFO L125 PetriNetUnfolderBase]: For 551633/551633 co-relation queries the response was YES. [2024-06-20 15:22:20,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41127 conditions, 5672 events. 3346/5672 cut-off events. For 551633/551633 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 38985 event pairs, 677 based on Foata normal form. 1/5665 useless extension candidates. Maximal degree in co-relation 40960. Up to 4534 conditions per place. [2024-06-20 15:22:20,050 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 276 selfloop transitions, 219 changer transitions 0/503 dead transitions. [2024-06-20 15:22:20,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 503 transitions, 7923 flow [2024-06-20 15:22:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:22:20,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:22:20,051 INFO L175 Difference]: Start difference. First operand has 378 places, 470 transitions, 6335 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:22:20,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 503 transitions, 7923 flow [2024-06-20 15:22:22,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 503 transitions, 7734 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-20 15:22:22,665 INFO L231 Difference]: Finished difference. Result has 379 places, 477 transitions, 6742 flow [2024-06-20 15:22:22,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6742, PETRI_PLACES=379, PETRI_TRANSITIONS=477} [2024-06-20 15:22:22,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-20 15:22:22,665 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 477 transitions, 6742 flow [2024-06-20 15:22:22,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:22,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:22,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:22,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 15:22:22,666 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:22,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:22,666 INFO L85 PathProgramCache]: Analyzing trace with hash 746217831, now seen corresponding path program 14 times [2024-06-20 15:22:22,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:22,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164698875] [2024-06-20 15:22:22,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:22,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:22,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:22,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:22,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:22,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164698875] [2024-06-20 15:22:22,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164698875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:22,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:22,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:22,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846594741] [2024-06-20 15:22:22,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:22,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:22,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:22,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:22,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:22,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:22,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 477 transitions, 6742 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:22,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:22,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:22,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:23,794 INFO L124 PetriNetUnfolderBase]: 3375/5730 cut-off events. [2024-06-20 15:22:23,795 INFO L125 PetriNetUnfolderBase]: For 578240/578240 co-relation queries the response was YES. [2024-06-20 15:22:23,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42320 conditions, 5730 events. 3375/5730 cut-off events. For 578240/578240 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 39403 event pairs, 687 based on Foata normal form. 1/5723 useless extension candidates. Maximal degree in co-relation 42152. Up to 4559 conditions per place. [2024-06-20 15:22:23,875 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 219 changer transitions 0/515 dead transitions. [2024-06-20 15:22:23,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 515 transitions, 8818 flow [2024-06-20 15:22:23,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:23,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-20 15:22:23,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6310975609756098 [2024-06-20 15:22:23,876 INFO L175 Difference]: Start difference. First operand has 379 places, 477 transitions, 6742 flow. Second operand 8 states and 207 transitions. [2024-06-20 15:22:23,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 515 transitions, 8818 flow [2024-06-20 15:22:26,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 515 transitions, 8377 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:26,832 INFO L231 Difference]: Finished difference. Result has 383 places, 487 transitions, 6963 flow [2024-06-20 15:22:26,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6334, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6963, PETRI_PLACES=383, PETRI_TRANSITIONS=487} [2024-06-20 15:22:26,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 341 predicate places. [2024-06-20 15:22:26,833 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 487 transitions, 6963 flow [2024-06-20 15:22:26,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:26,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:26,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 15:22:26,834 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:26,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:26,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1864596697, now seen corresponding path program 15 times [2024-06-20 15:22:26,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:26,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285510666] [2024-06-20 15:22:26,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:26,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:26,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:26,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:26,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285510666] [2024-06-20 15:22:26,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285510666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:26,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:26,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:26,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552407905] [2024-06-20 15:22:26,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:26,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:26,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:26,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:26,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:26,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 487 transitions, 6963 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:26,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:26,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:26,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:28,163 INFO L124 PetriNetUnfolderBase]: 3380/5727 cut-off events. [2024-06-20 15:22:28,164 INFO L125 PetriNetUnfolderBase]: For 590088/590088 co-relation queries the response was YES. [2024-06-20 15:22:28,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42377 conditions, 5727 events. 3380/5727 cut-off events. For 590088/590088 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 39311 event pairs, 677 based on Foata normal form. 1/5720 useless extension candidates. Maximal degree in co-relation 42208. Up to 4563 conditions per place. [2024-06-20 15:22:28,239 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 226 changer transitions 0/513 dead transitions. [2024-06-20 15:22:28,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 513 transitions, 8469 flow [2024-06-20 15:22:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:28,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:28,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:22:28,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:22:28,240 INFO L175 Difference]: Start difference. First operand has 383 places, 487 transitions, 6963 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:22:28,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 513 transitions, 8469 flow [2024-06-20 15:22:30,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 513 transitions, 8027 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:30,474 INFO L231 Difference]: Finished difference. Result has 387 places, 490 transitions, 7027 flow [2024-06-20 15:22:30,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6529, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7027, PETRI_PLACES=387, PETRI_TRANSITIONS=490} [2024-06-20 15:22:30,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-20 15:22:30,475 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 490 transitions, 7027 flow [2024-06-20 15:22:30,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:30,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:30,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 15:22:30,476 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:30,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash 756693351, now seen corresponding path program 16 times [2024-06-20 15:22:30,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:30,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702906587] [2024-06-20 15:22:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:30,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:30,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:30,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:30,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702906587] [2024-06-20 15:22:30,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702906587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:30,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:30,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:30,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512229230] [2024-06-20 15:22:30,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:30,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:30,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:30,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:30,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:30,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:30,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 490 transitions, 7027 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:30,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:30,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:30,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:31,653 INFO L124 PetriNetUnfolderBase]: 3393/5761 cut-off events. [2024-06-20 15:22:31,653 INFO L125 PetriNetUnfolderBase]: For 606163/606163 co-relation queries the response was YES. [2024-06-20 15:22:31,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42748 conditions, 5761 events. 3393/5761 cut-off events. For 606163/606163 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39680 event pairs, 687 based on Foata normal form. 1/5754 useless extension candidates. Maximal degree in co-relation 42578. Up to 4573 conditions per place. [2024-06-20 15:22:31,744 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 287 selfloop transitions, 226 changer transitions 0/521 dead transitions. [2024-06-20 15:22:31,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 521 transitions, 9015 flow [2024-06-20 15:22:31,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:31,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:31,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:22:31,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:22:31,746 INFO L175 Difference]: Start difference. First operand has 387 places, 490 transitions, 7027 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:22:31,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 521 transitions, 9015 flow [2024-06-20 15:22:34,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 521 transitions, 8561 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:34,689 INFO L231 Difference]: Finished difference. Result has 390 places, 496 transitions, 7141 flow [2024-06-20 15:22:34,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6581, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7141, PETRI_PLACES=390, PETRI_TRANSITIONS=496} [2024-06-20 15:22:34,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 15:22:34,690 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 496 transitions, 7141 flow [2024-06-20 15:22:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:34,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:34,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:34,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 15:22:34,690 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:34,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:34,691 INFO L85 PathProgramCache]: Analyzing trace with hash 546916041, now seen corresponding path program 17 times [2024-06-20 15:22:34,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:34,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887883901] [2024-06-20 15:22:34,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:34,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:34,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:34,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887883901] [2024-06-20 15:22:34,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887883901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:34,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:34,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:34,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824563274] [2024-06-20 15:22:34,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:34,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:34,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:34,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:34,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:34,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:34,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 496 transitions, 7141 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:34,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:34,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:34,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:36,000 INFO L124 PetriNetUnfolderBase]: 3390/5749 cut-off events. [2024-06-20 15:22:36,000 INFO L125 PetriNetUnfolderBase]: For 612798/612798 co-relation queries the response was YES. [2024-06-20 15:22:36,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42701 conditions, 5749 events. 3390/5749 cut-off events. For 612798/612798 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 39536 event pairs, 679 based on Foata normal form. 1/5742 useless extension candidates. Maximal degree in co-relation 42530. Up to 4571 conditions per place. [2024-06-20 15:22:36,078 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 282 selfloop transitions, 233 changer transitions 0/523 dead transitions. [2024-06-20 15:22:36,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 523 transitions, 8837 flow [2024-06-20 15:22:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:36,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:36,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:22:36,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:22:36,079 INFO L175 Difference]: Start difference. First operand has 390 places, 496 transitions, 7141 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:22:36,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 523 transitions, 8837 flow [2024-06-20 15:22:39,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 523 transitions, 8370 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:39,089 INFO L231 Difference]: Finished difference. Result has 394 places, 496 transitions, 7146 flow [2024-06-20 15:22:39,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6674, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=233, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7146, PETRI_PLACES=394, PETRI_TRANSITIONS=496} [2024-06-20 15:22:39,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 15:22:39,090 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 496 transitions, 7146 flow [2024-06-20 15:22:39,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:39,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:39,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:39,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 15:22:39,091 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:39,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash 547036011, now seen corresponding path program 18 times [2024-06-20 15:22:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:39,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169954812] [2024-06-20 15:22:39,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:39,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:39,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:39,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:39,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169954812] [2024-06-20 15:22:39,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169954812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:39,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:39,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:39,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663659784] [2024-06-20 15:22:39,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:39,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:39,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:39,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:39,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:39,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:39,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 496 transitions, 7146 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:39,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:39,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:39,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:40,302 INFO L124 PetriNetUnfolderBase]: 3395/5754 cut-off events. [2024-06-20 15:22:40,302 INFO L125 PetriNetUnfolderBase]: For 624795/624795 co-relation queries the response was YES. [2024-06-20 15:22:40,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42878 conditions, 5754 events. 3395/5754 cut-off events. For 624795/624795 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39548 event pairs, 679 based on Foata normal form. 1/5747 useless extension candidates. Maximal degree in co-relation 42706. Up to 5003 conditions per place. [2024-06-20 15:22:40,386 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 123 changer transitions 0/520 dead transitions. [2024-06-20 15:22:40,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 520 transitions, 8278 flow [2024-06-20 15:22:40,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:40,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:40,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:22:40,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:22:40,387 INFO L175 Difference]: Start difference. First operand has 394 places, 496 transitions, 7146 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:22:40,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 520 transitions, 8278 flow [2024-06-20 15:22:43,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 520 transitions, 7667 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-20 15:22:43,296 INFO L231 Difference]: Finished difference. Result has 393 places, 499 transitions, 6849 flow [2024-06-20 15:22:43,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6545, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6849, PETRI_PLACES=393, PETRI_TRANSITIONS=499} [2024-06-20 15:22:43,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-20 15:22:43,297 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 499 transitions, 6849 flow [2024-06-20 15:22:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:43,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:43,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:43,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 15:22:43,298 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:43,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash 556296021, now seen corresponding path program 19 times [2024-06-20 15:22:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726611272] [2024-06-20 15:22:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:43,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:43,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:43,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726611272] [2024-06-20 15:22:43,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726611272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:43,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:43,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:43,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962112332] [2024-06-20 15:22:43,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:43,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:43,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:43,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:43,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:43,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:43,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 499 transitions, 6849 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:43,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:43,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:43,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:44,597 INFO L124 PetriNetUnfolderBase]: 3392/5766 cut-off events. [2024-06-20 15:22:44,597 INFO L125 PetriNetUnfolderBase]: For 627813/627813 co-relation queries the response was YES. [2024-06-20 15:22:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42285 conditions, 5766 events. 3392/5766 cut-off events. For 627813/627813 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39824 event pairs, 691 based on Foata normal form. 1/5759 useless extension candidates. Maximal degree in co-relation 42114. Up to 4989 conditions per place. [2024-06-20 15:22:44,673 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 129 changer transitions 0/518 dead transitions. [2024-06-20 15:22:44,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 518 transitions, 8119 flow [2024-06-20 15:22:44,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:44,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:44,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:22:44,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:22:44,674 INFO L175 Difference]: Start difference. First operand has 393 places, 499 transitions, 6849 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:22:44,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 518 transitions, 8119 flow [2024-06-20 15:22:47,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 518 transitions, 7849 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:22:47,921 INFO L231 Difference]: Finished difference. Result has 395 places, 499 transitions, 6843 flow [2024-06-20 15:22:47,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6579, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6843, PETRI_PLACES=395, PETRI_TRANSITIONS=499} [2024-06-20 15:22:47,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-20 15:22:47,922 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 499 transitions, 6843 flow [2024-06-20 15:22:47,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:47,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:47,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:47,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 15:22:47,922 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:47,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:47,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1083495131, now seen corresponding path program 20 times [2024-06-20 15:22:47,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:47,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342959151] [2024-06-20 15:22:47,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:48,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:48,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342959151] [2024-06-20 15:22:48,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342959151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:48,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237324691] [2024-06-20 15:22:48,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:48,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:48,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:48,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:48,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:48,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:48,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 499 transitions, 6843 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:48,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:48,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:48,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:49,094 INFO L124 PetriNetUnfolderBase]: 3410/5797 cut-off events. [2024-06-20 15:22:49,094 INFO L125 PetriNetUnfolderBase]: For 649583/649583 co-relation queries the response was YES. [2024-06-20 15:22:49,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42653 conditions, 5797 events. 3410/5797 cut-off events. For 649583/649583 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40074 event pairs, 690 based on Foata normal form. 2/5791 useless extension candidates. Maximal degree in co-relation 42481. Up to 4592 conditions per place. [2024-06-20 15:22:49,181 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 285 selfloop transitions, 233 changer transitions 0/526 dead transitions. [2024-06-20 15:22:49,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 526 transitions, 8433 flow [2024-06-20 15:22:49,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:49,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:49,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:22:49,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:22:49,182 INFO L175 Difference]: Start difference. First operand has 395 places, 499 transitions, 6843 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:22:49,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 526 transitions, 8433 flow [2024-06-20 15:22:52,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 526 transitions, 8138 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 15:22:52,885 INFO L231 Difference]: Finished difference. Result has 398 places, 506 transitions, 7117 flow [2024-06-20 15:22:52,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7117, PETRI_PLACES=398, PETRI_TRANSITIONS=506} [2024-06-20 15:22:52,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-20 15:22:52,886 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 506 transitions, 7117 flow [2024-06-20 15:22:52,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:52,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:52,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:52,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 15:22:52,886 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:52,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:52,887 INFO L85 PathProgramCache]: Analyzing trace with hash 871777131, now seen corresponding path program 21 times [2024-06-20 15:22:52,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:52,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756951258] [2024-06-20 15:22:52,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:52,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:52,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:52,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:52,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756951258] [2024-06-20 15:22:52,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756951258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:52,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767874089] [2024-06-20 15:22:52,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:52,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:52,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:53,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:53,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 506 transitions, 7117 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:53,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:53,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:53,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:54,165 INFO L124 PetriNetUnfolderBase]: 3407/5777 cut-off events. [2024-06-20 15:22:54,166 INFO L125 PetriNetUnfolderBase]: For 653821/653821 co-relation queries the response was YES. [2024-06-20 15:22:54,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42962 conditions, 5777 events. 3407/5777 cut-off events. For 653821/653821 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 39795 event pairs, 679 based on Foata normal form. 1/5770 useless extension candidates. Maximal degree in co-relation 42789. Up to 5011 conditions per place. [2024-06-20 15:22:54,246 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 388 selfloop transitions, 130 changer transitions 0/526 dead transitions. [2024-06-20 15:22:54,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 526 transitions, 8201 flow [2024-06-20 15:22:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:22:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:22:54,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:22:54,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:22:54,248 INFO L175 Difference]: Start difference. First operand has 398 places, 506 transitions, 7117 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:22:54,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 526 transitions, 8201 flow [2024-06-20 15:22:57,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 526 transitions, 7857 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-20 15:22:57,354 INFO L231 Difference]: Finished difference. Result has 404 places, 506 transitions, 7039 flow [2024-06-20 15:22:57,354 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6773, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7039, PETRI_PLACES=404, PETRI_TRANSITIONS=506} [2024-06-20 15:22:57,355 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-20 15:22:57,355 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 506 transitions, 7039 flow [2024-06-20 15:22:57,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:57,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:22:57,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:22:57,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 15:22:57,357 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:22:57,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:22:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash 578644135, now seen corresponding path program 22 times [2024-06-20 15:22:57,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:22:57,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853962918] [2024-06-20 15:22:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:22:57,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:22:57,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:22:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:22:57,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:22:57,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853962918] [2024-06-20 15:22:57,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853962918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:22:57,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:22:57,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:22:57,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063763553] [2024-06-20 15:22:57,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:22:57,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:22:57,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:22:57,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:22:57,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:22:57,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:22:57,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 506 transitions, 7039 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:22:57,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:22:57,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:22:57,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:22:58,604 INFO L124 PetriNetUnfolderBase]: 3457/5860 cut-off events. [2024-06-20 15:22:58,604 INFO L125 PetriNetUnfolderBase]: For 699295/699295 co-relation queries the response was YES. [2024-06-20 15:22:58,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43774 conditions, 5860 events. 3457/5860 cut-off events. For 699295/699295 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40478 event pairs, 679 based on Foata normal form. 2/5854 useless extension candidates. Maximal degree in co-relation 43600. Up to 4972 conditions per place. [2024-06-20 15:22:58,694 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 151 changer transitions 0/537 dead transitions. [2024-06-20 15:22:58,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 537 transitions, 8569 flow [2024-06-20 15:22:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:22:58,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:22:58,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:22:58,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:22:58,695 INFO L175 Difference]: Start difference. First operand has 404 places, 506 transitions, 7039 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:22:58,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 537 transitions, 8569 flow [2024-06-20 15:23:01,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 537 transitions, 8289 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-20 15:23:01,351 INFO L231 Difference]: Finished difference. Result has 404 places, 519 transitions, 7326 flow [2024-06-20 15:23:01,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6759, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7326, PETRI_PLACES=404, PETRI_TRANSITIONS=519} [2024-06-20 15:23:01,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-20 15:23:01,352 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 519 transitions, 7326 flow [2024-06-20 15:23:01,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:01,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:01,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:01,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 15:23:01,353 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:01,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:01,353 INFO L85 PathProgramCache]: Analyzing trace with hash 601303405, now seen corresponding path program 23 times [2024-06-20 15:23:01,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:01,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718336564] [2024-06-20 15:23:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:01,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:01,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:01,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718336564] [2024-06-20 15:23:01,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718336564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:01,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:01,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:01,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289281783] [2024-06-20 15:23:01,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:01,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:01,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:01,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:01,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 519 transitions, 7326 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:01,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:01,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:01,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:02,643 INFO L124 PetriNetUnfolderBase]: 3451/5852 cut-off events. [2024-06-20 15:23:02,643 INFO L125 PetriNetUnfolderBase]: For 701541/701541 co-relation queries the response was YES. [2024-06-20 15:23:02,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43859 conditions, 5852 events. 3451/5852 cut-off events. For 701541/701541 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40385 event pairs, 679 based on Foata normal form. 2/5846 useless extension candidates. Maximal degree in co-relation 43683. Up to 4967 conditions per place. [2024-06-20 15:23:02,726 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 158 changer transitions 0/540 dead transitions. [2024-06-20 15:23:02,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 540 transitions, 8902 flow [2024-06-20 15:23:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:23:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:23:02,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 237 transitions. [2024-06-20 15:23:02,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5780487804878048 [2024-06-20 15:23:02,728 INFO L175 Difference]: Start difference. First operand has 404 places, 519 transitions, 7326 flow. Second operand 10 states and 237 transitions. [2024-06-20 15:23:02,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 540 transitions, 8902 flow [2024-06-20 15:23:05,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 540 transitions, 8613 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:05,775 INFO L231 Difference]: Finished difference. Result has 410 places, 521 transitions, 7418 flow [2024-06-20 15:23:05,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7037, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7418, PETRI_PLACES=410, PETRI_TRANSITIONS=521} [2024-06-20 15:23:05,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 368 predicate places. [2024-06-20 15:23:05,775 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 521 transitions, 7418 flow [2024-06-20 15:23:05,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:05,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:05,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:05,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 15:23:05,776 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:05,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:05,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1067297427, now seen corresponding path program 24 times [2024-06-20 15:23:05,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:05,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777364314] [2024-06-20 15:23:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:05,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:05,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:05,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:05,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777364314] [2024-06-20 15:23:05,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777364314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:05,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:05,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030260481] [2024-06-20 15:23:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:05,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:05,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:05,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:05,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 521 transitions, 7418 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:05,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:05,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:05,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:07,161 INFO L124 PetriNetUnfolderBase]: 3445/5844 cut-off events. [2024-06-20 15:23:07,162 INFO L125 PetriNetUnfolderBase]: For 702600/702600 co-relation queries the response was YES. [2024-06-20 15:23:07,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43737 conditions, 5844 events. 3445/5844 cut-off events. For 702600/702600 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40374 event pairs, 679 based on Foata normal form. 2/5838 useless extension candidates. Maximal degree in co-relation 43559. Up to 4962 conditions per place. [2024-06-20 15:23:07,259 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 372 selfloop transitions, 160 changer transitions 0/540 dead transitions. [2024-06-20 15:23:07,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 540 transitions, 8740 flow [2024-06-20 15:23:07,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:23:07,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:23:07,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-20 15:23:07,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:23:07,260 INFO L175 Difference]: Start difference. First operand has 410 places, 521 transitions, 7418 flow. Second operand 11 states and 253 transitions. [2024-06-20 15:23:07,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 540 transitions, 8740 flow [2024-06-20 15:23:10,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 540 transitions, 8346 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:23:10,244 INFO L231 Difference]: Finished difference. Result has 414 places, 521 transitions, 7351 flow [2024-06-20 15:23:10,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7351, PETRI_PLACES=414, PETRI_TRANSITIONS=521} [2024-06-20 15:23:10,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-20 15:23:10,244 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 521 transitions, 7351 flow [2024-06-20 15:23:10,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:10,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:10,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:10,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 15:23:10,245 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:10,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:10,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1814186405, now seen corresponding path program 25 times [2024-06-20 15:23:10,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:10,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789709153] [2024-06-20 15:23:10,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:10,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:10,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:10,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:10,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789709153] [2024-06-20 15:23:10,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789709153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:10,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:10,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:10,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686736063] [2024-06-20 15:23:10,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:10,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:10,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:10,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:10,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 521 transitions, 7351 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:10,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:10,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:10,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:11,560 INFO L124 PetriNetUnfolderBase]: 3439/5838 cut-off events. [2024-06-20 15:23:11,560 INFO L125 PetriNetUnfolderBase]: For 703002/703005 co-relation queries the response was YES. [2024-06-20 15:23:11,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43521 conditions, 5838 events. 3439/5838 cut-off events. For 703002/703005 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40286 event pairs, 679 based on Foata normal form. 4/5830 useless extension candidates. Maximal degree in co-relation 43342. Up to 4711 conditions per place. [2024-06-20 15:23:11,648 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 276 changer transitions 0/558 dead transitions. [2024-06-20 15:23:11,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 558 transitions, 9191 flow [2024-06-20 15:23:11,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-06-20 15:23:11,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-20 15:23:11,649 INFO L175 Difference]: Start difference. First operand has 414 places, 521 transitions, 7351 flow. Second operand 9 states and 240 transitions. [2024-06-20 15:23:11,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 558 transitions, 9191 flow [2024-06-20 15:23:15,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 558 transitions, 8821 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-20 15:23:15,304 INFO L231 Difference]: Finished difference. Result has 412 places, 521 transitions, 7552 flow [2024-06-20 15:23:15,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6981, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7552, PETRI_PLACES=412, PETRI_TRANSITIONS=521} [2024-06-20 15:23:15,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-20 15:23:15,305 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 521 transitions, 7552 flow [2024-06-20 15:23:15,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:15,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:15,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:15,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 15:23:15,305 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:15,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:15,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1797466841, now seen corresponding path program 26 times [2024-06-20 15:23:15,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:15,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248081856] [2024-06-20 15:23:15,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:15,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:15,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:15,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248081856] [2024-06-20 15:23:15,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248081856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:15,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:15,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:15,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420452031] [2024-06-20 15:23:15,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:15,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:15,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:15,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:15,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:15,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:15,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 521 transitions, 7552 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:15,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:15,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:15,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:16,611 INFO L124 PetriNetUnfolderBase]: 3433/5830 cut-off events. [2024-06-20 15:23:16,611 INFO L125 PetriNetUnfolderBase]: For 704327/704330 co-relation queries the response was YES. [2024-06-20 15:23:16,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43703 conditions, 5830 events. 3433/5830 cut-off events. For 704327/704330 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40235 event pairs, 679 based on Foata normal form. 4/5822 useless extension candidates. Maximal degree in co-relation 43523. Up to 4706 conditions per place. [2024-06-20 15:23:16,710 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 280 changer transitions 0/566 dead transitions. [2024-06-20 15:23:16,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 566 transitions, 9434 flow [2024-06-20 15:23:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:23:16,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:23:16,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 288 transitions. [2024-06-20 15:23:16,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6385809312638581 [2024-06-20 15:23:16,711 INFO L175 Difference]: Start difference. First operand has 412 places, 521 transitions, 7552 flow. Second operand 11 states and 288 transitions. [2024-06-20 15:23:16,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 566 transitions, 9434 flow [2024-06-20 15:23:20,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 566 transitions, 8750 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-20 15:23:20,245 INFO L231 Difference]: Finished difference. Result has 413 places, 521 transitions, 7469 flow [2024-06-20 15:23:20,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6886, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7469, PETRI_PLACES=413, PETRI_TRANSITIONS=521} [2024-06-20 15:23:20,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-20 15:23:20,246 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 521 transitions, 7469 flow [2024-06-20 15:23:20,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:20,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:20,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:20,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 15:23:20,247 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:20,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:20,247 INFO L85 PathProgramCache]: Analyzing trace with hash -771931767, now seen corresponding path program 27 times [2024-06-20 15:23:20,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:20,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8481661] [2024-06-20 15:23:20,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:20,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:20,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:20,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8481661] [2024-06-20 15:23:20,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8481661] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:20,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:20,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331411531] [2024-06-20 15:23:20,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:20,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:20,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:20,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:20,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:20,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 521 transitions, 7469 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:20,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:20,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:20,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:21,558 INFO L124 PetriNetUnfolderBase]: 3427/5828 cut-off events. [2024-06-20 15:23:21,558 INFO L125 PetriNetUnfolderBase]: For 666871/666871 co-relation queries the response was YES. [2024-06-20 15:23:21,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43190 conditions, 5828 events. 3427/5828 cut-off events. For 666871/666871 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40259 event pairs, 658 based on Foata normal form. 2/5826 useless extension candidates. Maximal degree in co-relation 43011. Up to 5214 conditions per place. [2024-06-20 15:23:21,645 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 484 selfloop transitions, 58 changer transitions 0/550 dead transitions. [2024-06-20 15:23:21,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 550 transitions, 8627 flow [2024-06-20 15:23:21,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:21,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:23:21,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-20 15:23:21,646 INFO L175 Difference]: Start difference. First operand has 413 places, 521 transitions, 7469 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:23:21,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 550 transitions, 8627 flow [2024-06-20 15:23:24,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 550 transitions, 8031 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-20 15:23:24,318 INFO L231 Difference]: Finished difference. Result has 408 places, 521 transitions, 7008 flow [2024-06-20 15:23:24,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6873, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7008, PETRI_PLACES=408, PETRI_TRANSITIONS=521} [2024-06-20 15:23:24,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-20 15:23:24,318 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 521 transitions, 7008 flow [2024-06-20 15:23:24,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:24,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:24,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:24,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 15:23:24,319 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:24,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1025306869, now seen corresponding path program 28 times [2024-06-20 15:23:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:24,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960418990] [2024-06-20 15:23:24,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:24,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:24,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:24,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:24,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960418990] [2024-06-20 15:23:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960418990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:24,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:24,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:24,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003715025] [2024-06-20 15:23:24,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:24,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:24,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:24,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:24,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:24,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:24,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 521 transitions, 7008 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:24,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:24,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:24,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:25,553 INFO L124 PetriNetUnfolderBase]: 3421/5812 cut-off events. [2024-06-20 15:23:25,553 INFO L125 PetriNetUnfolderBase]: For 619647/619647 co-relation queries the response was YES. [2024-06-20 15:23:25,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41968 conditions, 5812 events. 3421/5812 cut-off events. For 619647/619647 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40218 event pairs, 679 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 41790. Up to 4696 conditions per place. [2024-06-20 15:23:25,643 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 314 selfloop transitions, 223 changer transitions 0/545 dead transitions. [2024-06-20 15:23:25,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 545 transitions, 8350 flow [2024-06-20 15:23:25,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:23:25,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:23:25,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-20 15:23:25,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-20 15:23:25,644 INFO L175 Difference]: Start difference. First operand has 408 places, 521 transitions, 7008 flow. Second operand 7 states and 183 transitions. [2024-06-20 15:23:25,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 545 transitions, 8350 flow [2024-06-20 15:23:29,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 545 transitions, 8192 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:29,236 INFO L231 Difference]: Finished difference. Result has 409 places, 521 transitions, 7316 flow [2024-06-20 15:23:29,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6854, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7316, PETRI_PLACES=409, PETRI_TRANSITIONS=521} [2024-06-20 15:23:29,237 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-20 15:23:29,237 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 521 transitions, 7316 flow [2024-06-20 15:23:29,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:29,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:29,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:29,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 15:23:29,238 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:29,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:29,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1281807379, now seen corresponding path program 29 times [2024-06-20 15:23:29,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:29,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514541841] [2024-06-20 15:23:29,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:29,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:29,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:29,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:29,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514541841] [2024-06-20 15:23:29,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514541841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:29,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:29,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:29,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358912080] [2024-06-20 15:23:29,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:29,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:29,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:29,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:29,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:29,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:29,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 521 transitions, 7316 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:29,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:29,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:29,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:30,493 INFO L124 PetriNetUnfolderBase]: 3415/5812 cut-off events. [2024-06-20 15:23:30,493 INFO L125 PetriNetUnfolderBase]: For 599413/599413 co-relation queries the response was YES. [2024-06-20 15:23:30,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42095 conditions, 5812 events. 3415/5812 cut-off events. For 599413/599413 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40267 event pairs, 683 based on Foata normal form. 2/5806 useless extension candidates. Maximal degree in co-relation 41916. Up to 4691 conditions per place. [2024-06-20 15:23:30,582 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 299 selfloop transitions, 247 changer transitions 0/554 dead transitions. [2024-06-20 15:23:30,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 554 transitions, 8902 flow [2024-06-20 15:23:30,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:23:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:23:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-20 15:23:30,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6368563685636857 [2024-06-20 15:23:30,583 INFO L175 Difference]: Start difference. First operand has 409 places, 521 transitions, 7316 flow. Second operand 9 states and 235 transitions. [2024-06-20 15:23:30,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 554 transitions, 8902 flow [2024-06-20 15:23:33,148 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 554 transitions, 8292 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-20 15:23:33,154 INFO L231 Difference]: Finished difference. Result has 409 places, 521 transitions, 7228 flow [2024-06-20 15:23:33,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6714, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7228, PETRI_PLACES=409, PETRI_TRANSITIONS=521} [2024-06-20 15:23:33,155 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-20 15:23:33,155 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 521 transitions, 7228 flow [2024-06-20 15:23:33,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:33,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:33,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:33,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 15:23:33,156 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:33,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash -762174501, now seen corresponding path program 30 times [2024-06-20 15:23:33,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:33,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552903437] [2024-06-20 15:23:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:33,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:33,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:33,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:33,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552903437] [2024-06-20 15:23:33,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552903437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:33,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:33,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:33,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674852182] [2024-06-20 15:23:33,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:33,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:33,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:33,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:33,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:33,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:33,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 521 transitions, 7228 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:33,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:33,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:33,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:34,443 INFO L124 PetriNetUnfolderBase]: 3409/5796 cut-off events. [2024-06-20 15:23:34,443 INFO L125 PetriNetUnfolderBase]: For 577822/577822 co-relation queries the response was YES. [2024-06-20 15:23:34,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41687 conditions, 5796 events. 3409/5796 cut-off events. For 577822/577822 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 40114 event pairs, 679 based on Foata normal form. 2/5790 useless extension candidates. Maximal degree in co-relation 41508. Up to 4686 conditions per place. [2024-06-20 15:23:34,542 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 254 changer transitions 0/557 dead transitions. [2024-06-20 15:23:34,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 557 transitions, 8620 flow [2024-06-20 15:23:34,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:23:34,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:23:34,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 255 transitions. [2024-06-20 15:23:34,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:23:34,547 INFO L175 Difference]: Start difference. First operand has 409 places, 521 transitions, 7228 flow. Second operand 10 states and 255 transitions. [2024-06-20 15:23:34,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 557 transitions, 8620 flow [2024-06-20 15:23:37,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 557 transitions, 8028 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-20 15:23:37,890 INFO L231 Difference]: Finished difference. Result has 408 places, 521 transitions, 7174 flow [2024-06-20 15:23:37,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6642, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7174, PETRI_PLACES=408, PETRI_TRANSITIONS=521} [2024-06-20 15:23:37,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-20 15:23:37,891 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 521 transitions, 7174 flow [2024-06-20 15:23:37,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:37,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:37,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:37,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 15:23:37,892 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:37,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:37,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1857268731, now seen corresponding path program 5 times [2024-06-20 15:23:37,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:37,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245471528] [2024-06-20 15:23:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:37,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:37,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:37,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245471528] [2024-06-20 15:23:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245471528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322004262] [2024-06-20 15:23:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:38,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:38,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:38,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:38,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:38,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:38,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 521 transitions, 7174 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:38,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:38,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:38,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:39,192 INFO L124 PetriNetUnfolderBase]: 3594/6127 cut-off events. [2024-06-20 15:23:39,192 INFO L125 PetriNetUnfolderBase]: For 713984/713984 co-relation queries the response was YES. [2024-06-20 15:23:39,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47126 conditions, 6127 events. 3594/6127 cut-off events. For 713984/713984 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 42798 event pairs, 739 based on Foata normal form. 2/6124 useless extension candidates. Maximal degree in co-relation 46948. Up to 5095 conditions per place. [2024-06-20 15:23:39,286 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 425 selfloop transitions, 126 changer transitions 0/559 dead transitions. [2024-06-20 15:23:39,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 559 transitions, 8819 flow [2024-06-20 15:23:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:39,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:39,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-20 15:23:39,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-20 15:23:39,287 INFO L175 Difference]: Start difference. First operand has 408 places, 521 transitions, 7174 flow. Second operand 8 states and 201 transitions. [2024-06-20 15:23:39,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 559 transitions, 8819 flow [2024-06-20 15:23:42,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 559 transitions, 8278 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-20 15:23:42,780 INFO L231 Difference]: Finished difference. Result has 404 places, 529 transitions, 7175 flow [2024-06-20 15:23:42,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6641, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7175, PETRI_PLACES=404, PETRI_TRANSITIONS=529} [2024-06-20 15:23:42,781 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-20 15:23:42,781 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 529 transitions, 7175 flow [2024-06-20 15:23:42,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:42,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:42,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:42,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 15:23:42,781 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:42,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:42,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1810700765, now seen corresponding path program 6 times [2024-06-20 15:23:42,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:42,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430943385] [2024-06-20 15:23:42,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:42,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:42,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:42,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:42,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430943385] [2024-06-20 15:23:42,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430943385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:42,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:42,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:42,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316320791] [2024-06-20 15:23:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:42,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:42,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:42,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:42,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 529 transitions, 7175 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:42,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:42,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:42,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:44,159 INFO L124 PetriNetUnfolderBase]: 3733/6343 cut-off events. [2024-06-20 15:23:44,159 INFO L125 PetriNetUnfolderBase]: For 787263/787263 co-relation queries the response was YES. [2024-06-20 15:23:44,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51016 conditions, 6343 events. 3733/6343 cut-off events. For 787263/787263 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 44374 event pairs, 771 based on Foata normal form. 2/6339 useless extension candidates. Maximal degree in co-relation 50840. Up to 5354 conditions per place. [2024-06-20 15:23:44,262 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 129 changer transitions 0/567 dead transitions. [2024-06-20 15:23:44,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 567 transitions, 8846 flow [2024-06-20 15:23:44,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:44,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:23:44,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:23:44,263 INFO L175 Difference]: Start difference. First operand has 404 places, 529 transitions, 7175 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:23:44,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 567 transitions, 8846 flow [2024-06-20 15:23:47,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 567 transitions, 8555 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:47,552 INFO L231 Difference]: Finished difference. Result has 408 places, 537 transitions, 7439 flow [2024-06-20 15:23:47,552 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6884, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7439, PETRI_PLACES=408, PETRI_TRANSITIONS=537} [2024-06-20 15:23:47,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-20 15:23:47,553 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 537 transitions, 7439 flow [2024-06-20 15:23:47,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:47,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:47,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:47,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 15:23:47,553 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:47,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:47,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1854411771, now seen corresponding path program 7 times [2024-06-20 15:23:47,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:47,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538940286] [2024-06-20 15:23:47,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:47,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:47,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:47,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:47,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538940286] [2024-06-20 15:23:47,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538940286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:47,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:47,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852977145] [2024-06-20 15:23:47,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:47,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:47,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:47,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:47,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:47,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:47,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 537 transitions, 7439 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:47,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:47,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:47,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:48,946 INFO L124 PetriNetUnfolderBase]: 3741/6361 cut-off events. [2024-06-20 15:23:48,946 INFO L125 PetriNetUnfolderBase]: For 803600/803600 co-relation queries the response was YES. [2024-06-20 15:23:49,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51343 conditions, 6361 events. 3741/6361 cut-off events. For 803600/803600 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44628 event pairs, 779 based on Foata normal form. 2/6358 useless extension candidates. Maximal degree in co-relation 51165. Up to 5515 conditions per place. [2024-06-20 15:23:49,045 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 119 changer transitions 0/561 dead transitions. [2024-06-20 15:23:49,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 561 transitions, 8654 flow [2024-06-20 15:23:49,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-20 15:23:49,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-20 15:23:49,046 INFO L175 Difference]: Start difference. First operand has 408 places, 537 transitions, 7439 flow. Second operand 8 states and 193 transitions. [2024-06-20 15:23:49,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 561 transitions, 8654 flow [2024-06-20 15:23:52,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 561 transitions, 8340 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 15:23:52,390 INFO L231 Difference]: Finished difference. Result has 411 places, 539 transitions, 7427 flow [2024-06-20 15:23:52,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7125, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7427, PETRI_PLACES=411, PETRI_TRANSITIONS=539} [2024-06-20 15:23:52,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-20 15:23:52,391 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 539 transitions, 7427 flow [2024-06-20 15:23:52,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:52,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:52,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:52,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 15:23:52,391 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:52,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash 818168189, now seen corresponding path program 8 times [2024-06-20 15:23:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:52,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154123035] [2024-06-20 15:23:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:52,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:52,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:52,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:52,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154123035] [2024-06-20 15:23:52,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154123035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:52,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:52,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:52,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133589019] [2024-06-20 15:23:52,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:52,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:52,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:52,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:52,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:52,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:52,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 539 transitions, 7427 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:52,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:52,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:52,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:53,880 INFO L124 PetriNetUnfolderBase]: 3736/6354 cut-off events. [2024-06-20 15:23:53,880 INFO L125 PetriNetUnfolderBase]: For 805666/805666 co-relation queries the response was YES. [2024-06-20 15:23:53,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50937 conditions, 6354 events. 3736/6354 cut-off events. For 805666/805666 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 44543 event pairs, 778 based on Foata normal form. 2/6351 useless extension candidates. Maximal degree in co-relation 50758. Up to 5508 conditions per place. [2024-06-20 15:23:53,971 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 431 selfloop transitions, 122 changer transitions 0/561 dead transitions. [2024-06-20 15:23:53,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 561 transitions, 8587 flow [2024-06-20 15:23:53,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:23:53,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:23:53,973 INFO L175 Difference]: Start difference. First operand has 411 places, 539 transitions, 7427 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:23:53,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 561 transitions, 8587 flow [2024-06-20 15:23:57,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 561 transitions, 8312 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:23:57,738 INFO L231 Difference]: Finished difference. Result has 413 places, 539 transitions, 7401 flow [2024-06-20 15:23:57,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7152, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7401, PETRI_PLACES=413, PETRI_TRANSITIONS=539} [2024-06-20 15:23:57,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-20 15:23:57,738 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 539 transitions, 7401 flow [2024-06-20 15:23:57,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:57,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:23:57,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:23:57,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 15:23:57,739 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:23:57,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:23:57,739 INFO L85 PathProgramCache]: Analyzing trace with hash 871992457, now seen corresponding path program 9 times [2024-06-20 15:23:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:23:57,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593785905] [2024-06-20 15:23:57,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:23:57,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:23:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:23:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:23:57,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:23:57,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593785905] [2024-06-20 15:23:57,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593785905] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:23:57,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:23:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:23:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992718066] [2024-06-20 15:23:57,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:23:57,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:23:57,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:23:57,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:23:57,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:23:57,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:23:57,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 539 transitions, 7401 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:23:57,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:23:57,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:23:57,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:23:59,209 INFO L124 PetriNetUnfolderBase]: 3744/6366 cut-off events. [2024-06-20 15:23:59,209 INFO L125 PetriNetUnfolderBase]: For 820303/820303 co-relation queries the response was YES. [2024-06-20 15:23:59,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51166 conditions, 6366 events. 3744/6366 cut-off events. For 820303/820303 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44642 event pairs, 778 based on Foata normal form. 2/6363 useless extension candidates. Maximal degree in co-relation 50986. Up to 5676 conditions per place. [2024-06-20 15:23:59,311 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 493 selfloop transitions, 59 changer transitions 0/560 dead transitions. [2024-06-20 15:23:59,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 560 transitions, 8617 flow [2024-06-20 15:23:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:23:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:23:59,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-20 15:23:59,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-20 15:23:59,313 INFO L175 Difference]: Start difference. First operand has 413 places, 539 transitions, 7401 flow. Second operand 8 states and 187 transitions. [2024-06-20 15:23:59,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 560 transitions, 8617 flow [2024-06-20 15:24:02,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 560 transitions, 8336 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:02,803 INFO L231 Difference]: Finished difference. Result has 415 places, 541 transitions, 7313 flow [2024-06-20 15:24:02,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7120, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=480, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7313, PETRI_PLACES=415, PETRI_TRANSITIONS=541} [2024-06-20 15:24:02,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-20 15:24:02,804 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 541 transitions, 7313 flow [2024-06-20 15:24:02,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:02,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:02,804 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] [2024-06-20 15:24:02,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 15:24:02,804 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:02,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1016248343, now seen corresponding path program 10 times [2024-06-20 15:24:02,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:02,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422553176] [2024-06-20 15:24:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:02,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:02,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:02,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422553176] [2024-06-20 15:24:02,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422553176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:02,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:02,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:02,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380289355] [2024-06-20 15:24:02,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:02,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:02,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:02,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:02,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:02,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:02,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 541 transitions, 7313 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:02,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:02,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:02,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:04,207 INFO L124 PetriNetUnfolderBase]: 3752/6392 cut-off events. [2024-06-20 15:24:04,207 INFO L125 PetriNetUnfolderBase]: For 837119/837119 co-relation queries the response was YES. [2024-06-20 15:24:04,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51250 conditions, 6392 events. 3752/6392 cut-off events. For 837119/837119 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44803 event pairs, 608 based on Foata normal form. 2/6389 useless extension candidates. Maximal degree in co-relation 51069. Up to 3948 conditions per place. [2024-06-20 15:24:04,311 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 157 changer transitions 0/578 dead transitions. [2024-06-20 15:24:04,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 578 transitions, 9050 flow [2024-06-20 15:24:04,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:04,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:04,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-20 15:24:04,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-20 15:24:04,312 INFO L175 Difference]: Start difference. First operand has 415 places, 541 transitions, 7313 flow. Second operand 8 states and 205 transitions. [2024-06-20 15:24:04,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 578 transitions, 9050 flow [2024-06-20 15:24:08,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 578 transitions, 8908 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:08,157 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 7549 flow [2024-06-20 15:24:08,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7171, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7549, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-20 15:24:08,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 15:24:08,158 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 7549 flow [2024-06-20 15:24:08,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:08,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:08,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:08,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 15:24:08,159 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:08,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:08,160 INFO L85 PathProgramCache]: Analyzing trace with hash -1015890293, now seen corresponding path program 11 times [2024-06-20 15:24:08,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:08,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572217587] [2024-06-20 15:24:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:08,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:08,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:08,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:08,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:08,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572217587] [2024-06-20 15:24:08,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572217587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:08,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:08,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:08,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197560773] [2024-06-20 15:24:08,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:08,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:08,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:08,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:08,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 7549 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:08,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:08,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:08,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:09,551 INFO L124 PetriNetUnfolderBase]: 3727/6340 cut-off events. [2024-06-20 15:24:09,551 INFO L125 PetriNetUnfolderBase]: For 847749/847749 co-relation queries the response was YES. [2024-06-20 15:24:09,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51126 conditions, 6340 events. 3727/6340 cut-off events. For 847749/847749 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44283 event pairs, 671 based on Foata normal form. 8/6343 useless extension candidates. Maximal degree in co-relation 50944. Up to 3934 conditions per place. [2024-06-20 15:24:09,651 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 423 selfloop transitions, 144 changer transitions 0/575 dead transitions. [2024-06-20 15:24:09,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 575 transitions, 9011 flow [2024-06-20 15:24:09,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:09,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 15:24:09,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-20 15:24:09,652 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 7549 flow. Second operand 8 states and 202 transitions. [2024-06-20 15:24:09,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 575 transitions, 9011 flow [2024-06-20 15:24:13,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 575 transitions, 8558 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:13,516 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 7390 flow [2024-06-20 15:24:13,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7096, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7390, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-20 15:24:13,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 15:24:13,517 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 7390 flow [2024-06-20 15:24:13,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:13,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:13,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:13,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 15:24:13,518 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:13,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:13,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1741670377, now seen corresponding path program 12 times [2024-06-20 15:24:13,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:13,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460282146] [2024-06-20 15:24:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:13,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:13,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460282146] [2024-06-20 15:24:13,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460282146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:13,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:13,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:13,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270735178] [2024-06-20 15:24:13,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:13,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:13,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:13,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:13,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:13,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:13,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 7390 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:13,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:13,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:13,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:14,903 INFO L124 PetriNetUnfolderBase]: 3704/6306 cut-off events. [2024-06-20 15:24:14,903 INFO L125 PetriNetUnfolderBase]: For 813340/813340 co-relation queries the response was YES. [2024-06-20 15:24:14,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49156 conditions, 6306 events. 3704/6306 cut-off events. For 813340/813340 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44217 event pairs, 742 based on Foata normal form. 10/6311 useless extension candidates. Maximal degree in co-relation 48976. Up to 5182 conditions per place. [2024-06-20 15:24:15,008 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 445 selfloop transitions, 117 changer transitions 0/570 dead transitions. [2024-06-20 15:24:15,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 570 transitions, 8834 flow [2024-06-20 15:24:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:24:15,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:24:15,009 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 7390 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:24:15,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 570 transitions, 8834 flow [2024-06-20 15:24:18,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 570 transitions, 8521 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:24:18,879 INFO L231 Difference]: Finished difference. Result has 419 places, 543 transitions, 7318 flow [2024-06-20 15:24:18,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7077, PETRI_DIFFERENCE_MINUEND_PLACES=411, 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=8, PETRI_FLOW=7318, PETRI_PLACES=419, PETRI_TRANSITIONS=543} [2024-06-20 15:24:18,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-20 15:24:18,880 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 543 transitions, 7318 flow [2024-06-20 15:24:18,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:18,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:18,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:18,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 15:24:18,880 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:18,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:18,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1318787573, now seen corresponding path program 13 times [2024-06-20 15:24:18,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:18,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743206146] [2024-06-20 15:24:18,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:18,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:18,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:18,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743206146] [2024-06-20 15:24:18,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743206146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:18,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:18,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:18,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4259946] [2024-06-20 15:24:18,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:18,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:18,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:18,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:18,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:19,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:19,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 543 transitions, 7318 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:19,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:19,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:19,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:20,339 INFO L124 PetriNetUnfolderBase]: 3674/6260 cut-off events. [2024-06-20 15:24:20,339 INFO L125 PetriNetUnfolderBase]: For 771295/771295 co-relation queries the response was YES. [2024-06-20 15:24:20,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47454 conditions, 6260 events. 3674/6260 cut-off events. For 771295/771295 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43967 event pairs, 748 based on Foata normal form. 10/6265 useless extension candidates. Maximal degree in co-relation 47273. Up to 5382 conditions per place. [2024-06-20 15:24:20,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 446 selfloop transitions, 111 changer transitions 0/565 dead transitions. [2024-06-20 15:24:20,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 565 transitions, 8510 flow [2024-06-20 15:24:20,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:24:20,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:24:20,432 INFO L175 Difference]: Start difference. First operand has 419 places, 543 transitions, 7318 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:24:20,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 565 transitions, 8510 flow [2024-06-20 15:24:24,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 565 transitions, 8249 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:24,678 INFO L231 Difference]: Finished difference. Result has 422 places, 543 transitions, 7285 flow [2024-06-20 15:24:24,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7057, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7285, PETRI_PLACES=422, PETRI_TRANSITIONS=543} [2024-06-20 15:24:24,679 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-20 15:24:24,679 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 543 transitions, 7285 flow [2024-06-20 15:24:24,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:24,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:24,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:24,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 15:24:24,679 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:24,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:24,680 INFO L85 PathProgramCache]: Analyzing trace with hash 857811851, now seen corresponding path program 14 times [2024-06-20 15:24:24,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:24,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593120189] [2024-06-20 15:24:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:24,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:24,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:24,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:24,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:24,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593120189] [2024-06-20 15:24:24,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593120189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:24,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:24,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:24,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858054775] [2024-06-20 15:24:24,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:24,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:24,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:24,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:24,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 543 transitions, 7285 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:24,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:24,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:24,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:26,075 INFO L124 PetriNetUnfolderBase]: 3651/6227 cut-off events. [2024-06-20 15:24:26,075 INFO L125 PetriNetUnfolderBase]: For 726911/726911 co-relation queries the response was YES. [2024-06-20 15:24:26,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45936 conditions, 6227 events. 3651/6227 cut-off events. For 726911/726911 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43725 event pairs, 739 based on Foata normal form. 10/6232 useless extension candidates. Maximal degree in co-relation 45754. Up to 5467 conditions per place. [2024-06-20 15:24:26,175 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 484 selfloop transitions, 70 changer transitions 0/562 dead transitions. [2024-06-20 15:24:26,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 562 transitions, 8463 flow [2024-06-20 15:24:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:26,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:26,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 15:24:26,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-20 15:24:26,176 INFO L175 Difference]: Start difference. First operand has 422 places, 543 transitions, 7285 flow. Second operand 8 states and 190 transitions. [2024-06-20 15:24:26,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 562 transitions, 8463 flow [2024-06-20 15:24:30,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 562 transitions, 8200 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:24:30,093 INFO L231 Difference]: Finished difference. Result has 422 places, 543 transitions, 7168 flow [2024-06-20 15:24:30,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7022, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7168, PETRI_PLACES=422, PETRI_TRANSITIONS=543} [2024-06-20 15:24:30,093 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-20 15:24:30,093 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 543 transitions, 7168 flow [2024-06-20 15:24:30,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:30,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:30,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:30,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 15:24:30,094 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:30,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:30,094 INFO L85 PathProgramCache]: Analyzing trace with hash 867335051, now seen corresponding path program 15 times [2024-06-20 15:24:30,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:30,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61156808] [2024-06-20 15:24:30,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:30,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:30,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:30,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:30,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61156808] [2024-06-20 15:24:30,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61156808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:30,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:30,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:30,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734252460] [2024-06-20 15:24:30,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:30,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:30,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:30,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:30,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:30,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:30,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 543 transitions, 7168 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:30,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:30,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:30,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:31,472 INFO L124 PetriNetUnfolderBase]: 3628/6192 cut-off events. [2024-06-20 15:24:31,472 INFO L125 PetriNetUnfolderBase]: For 682287/682287 co-relation queries the response was YES. [2024-06-20 15:24:31,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44499 conditions, 6192 events. 3628/6192 cut-off events. For 682287/682287 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43471 event pairs, 712 based on Foata normal form. 10/6197 useless extension candidates. Maximal degree in co-relation 44316. Up to 5076 conditions per place. [2024-06-20 15:24:31,570 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 482 selfloop transitions, 77 changer transitions 0/567 dead transitions. [2024-06-20 15:24:31,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 567 transitions, 8604 flow [2024-06-20 15:24:31,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:24:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:24:31,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:24:31,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:24:31,571 INFO L175 Difference]: Start difference. First operand has 422 places, 543 transitions, 7168 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:24:31,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 567 transitions, 8604 flow [2024-06-20 15:24:35,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 567 transitions, 8438 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:24:35,614 INFO L231 Difference]: Finished difference. Result has 424 places, 543 transitions, 7164 flow [2024-06-20 15:24:35,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7002, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7164, PETRI_PLACES=424, PETRI_TRANSITIONS=543} [2024-06-20 15:24:35,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-20 15:24:35,614 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 543 transitions, 7164 flow [2024-06-20 15:24:35,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:35,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:35,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 15:24:35,615 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:35,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:35,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1067082101, now seen corresponding path program 16 times [2024-06-20 15:24:35,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:35,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706357060] [2024-06-20 15:24:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:35,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:35,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706357060] [2024-06-20 15:24:35,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706357060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:35,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:35,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:35,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557359820] [2024-06-20 15:24:35,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:35,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:35,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:35,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:35,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:35,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:35,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 543 transitions, 7164 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:35,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:35,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:35,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:37,000 INFO L124 PetriNetUnfolderBase]: 3598/6146 cut-off events. [2024-06-20 15:24:37,001 INFO L125 PetriNetUnfolderBase]: For 637922/637922 co-relation queries the response was YES. [2024-06-20 15:24:37,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43125 conditions, 6146 events. 3598/6146 cut-off events. For 637922/637922 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 43193 event pairs, 718 based on Foata normal form. 10/6151 useless extension candidates. Maximal degree in co-relation 42941. Up to 5388 conditions per place. [2024-06-20 15:24:37,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 482 selfloop transitions, 74 changer transitions 0/564 dead transitions. [2024-06-20 15:24:37,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 564 transitions, 8350 flow [2024-06-20 15:24:37,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:24:37,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:24:37,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-20 15:24:37,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:24:37,127 INFO L175 Difference]: Start difference. First operand has 424 places, 543 transitions, 7164 flow. Second operand 10 states and 230 transitions. [2024-06-20 15:24:37,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 564 transitions, 8350 flow [2024-06-20 15:24:41,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 564 transitions, 8169 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:41,060 INFO L231 Difference]: Finished difference. Result has 429 places, 543 transitions, 7137 flow [2024-06-20 15:24:41,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6983, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7137, PETRI_PLACES=429, PETRI_TRANSITIONS=543} [2024-06-20 15:24:41,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-20 15:24:41,061 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 543 transitions, 7137 flow [2024-06-20 15:24:41,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:41,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:41,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:41,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 15:24:41,061 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:41,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:41,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1029592709, now seen corresponding path program 1 times [2024-06-20 15:24:41,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:41,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829462897] [2024-06-20 15:24:41,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:41,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:41,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:41,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829462897] [2024-06-20 15:24:41,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829462897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:41,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:41,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:41,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891984974] [2024-06-20 15:24:41,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:41,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:41,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:41,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:41,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:41,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:41,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 543 transitions, 7137 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:41,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:41,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:41,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:42,352 INFO L124 PetriNetUnfolderBase]: 3606/6160 cut-off events. [2024-06-20 15:24:42,352 INFO L125 PetriNetUnfolderBase]: For 598664/598664 co-relation queries the response was YES. [2024-06-20 15:24:42,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42955 conditions, 6160 events. 3606/6160 cut-off events. For 598664/598664 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 43284 event pairs, 716 based on Foata normal form. 2/6157 useless extension candidates. Maximal degree in co-relation 42770. Up to 5473 conditions per place. [2024-06-20 15:24:42,450 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 500 selfloop transitions, 52 changer transitions 0/560 dead transitions. [2024-06-20 15:24:42,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 560 transitions, 8327 flow [2024-06-20 15:24:42,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:42,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:42,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:24:42,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 15:24:42,451 INFO L175 Difference]: Start difference. First operand has 429 places, 543 transitions, 7137 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:24:42,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 560 transitions, 8327 flow [2024-06-20 15:24:46,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 560 transitions, 8127 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:24:46,037 INFO L231 Difference]: Finished difference. Result has 426 places, 545 transitions, 7100 flow [2024-06-20 15:24:46,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6937, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7100, PETRI_PLACES=426, PETRI_TRANSITIONS=545} [2024-06-20 15:24:46,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 384 predicate places. [2024-06-20 15:24:46,038 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 545 transitions, 7100 flow [2024-06-20 15:24:46,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:46,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:46,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:46,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 15:24:46,038 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:46,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:46,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1044829829, now seen corresponding path program 2 times [2024-06-20 15:24:46,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:46,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305681035] [2024-06-20 15:24:46,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:46,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:46,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:46,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:46,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305681035] [2024-06-20 15:24:46,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305681035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:46,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:46,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:24:46,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697906777] [2024-06-20 15:24:46,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:46,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:24:46,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:46,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:24:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:24:46,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:46,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 545 transitions, 7100 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:46,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:46,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:46,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:47,482 INFO L124 PetriNetUnfolderBase]: 3614/6168 cut-off events. [2024-06-20 15:24:47,482 INFO L125 PetriNetUnfolderBase]: For 607911/607911 co-relation queries the response was YES. [2024-06-20 15:24:47,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43021 conditions, 6168 events. 3614/6168 cut-off events. For 607911/607911 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43356 event pairs, 710 based on Foata normal form. 2/6165 useless extension candidates. Maximal degree in co-relation 42835. Up to 5465 conditions per place. [2024-06-20 15:24:47,564 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 501 selfloop transitions, 54 changer transitions 0/563 dead transitions. [2024-06-20 15:24:47,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 563 transitions, 8302 flow [2024-06-20 15:24:47,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:47,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 15:24:47,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-20 15:24:47,565 INFO L175 Difference]: Start difference. First operand has 426 places, 545 transitions, 7100 flow. Second operand 7 states and 166 transitions. [2024-06-20 15:24:47,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 563 transitions, 8302 flow [2024-06-20 15:24:51,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 563 transitions, 8143 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:51,317 INFO L231 Difference]: Finished difference. Result has 428 places, 547 transitions, 7112 flow [2024-06-20 15:24:51,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6941, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7112, PETRI_PLACES=428, PETRI_TRANSITIONS=547} [2024-06-20 15:24:51,318 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-20 15:24:51,318 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 547 transitions, 7112 flow [2024-06-20 15:24:51,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:51,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:51,318 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] [2024-06-20 15:24:51,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-20 15:24:51,318 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:51,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:51,319 INFO L85 PathProgramCache]: Analyzing trace with hash 657853893, now seen corresponding path program 17 times [2024-06-20 15:24:51,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:51,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727943956] [2024-06-20 15:24:51,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:51,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:51,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:51,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:51,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727943956] [2024-06-20 15:24:51,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727943956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:51,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:51,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:51,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501732401] [2024-06-20 15:24:51,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:51,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:51,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:51,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:51,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:51,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:51,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 547 transitions, 7112 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:51,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:51,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:51,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:52,781 INFO L124 PetriNetUnfolderBase]: 3591/6136 cut-off events. [2024-06-20 15:24:52,782 INFO L125 PetriNetUnfolderBase]: For 586130/586130 co-relation queries the response was YES. [2024-06-20 15:24:52,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41450 conditions, 6136 events. 3591/6136 cut-off events. For 586130/586130 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43106 event pairs, 702 based on Foata normal form. 10/6141 useless extension candidates. Maximal degree in co-relation 41263. Up to 5235 conditions per place. [2024-06-20 15:24:52,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 457 selfloop transitions, 109 changer transitions 0/574 dead transitions. [2024-06-20 15:24:52,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 574 transitions, 8336 flow [2024-06-20 15:24:52,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:24:52,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:24:52,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-20 15:24:52,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6306620209059234 [2024-06-20 15:24:52,881 INFO L175 Difference]: Start difference. First operand has 428 places, 547 transitions, 7112 flow. Second operand 7 states and 181 transitions. [2024-06-20 15:24:52,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 574 transitions, 8336 flow [2024-06-20 15:24:56,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 574 transitions, 8151 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 15:24:56,416 INFO L231 Difference]: Finished difference. Result has 430 places, 547 transitions, 7158 flow [2024-06-20 15:24:56,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6927, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7158, PETRI_PLACES=430, PETRI_TRANSITIONS=547} [2024-06-20 15:24:56,417 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-20 15:24:56,417 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 547 transitions, 7158 flow [2024-06-20 15:24:56,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:56,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:24:56,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:24:56,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-20 15:24:56,418 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:24:56,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:24:56,418 INFO L85 PathProgramCache]: Analyzing trace with hash -624106841, now seen corresponding path program 18 times [2024-06-20 15:24:56,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:24:56,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417780443] [2024-06-20 15:24:56,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:24:56,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:24:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:24:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:24:56,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:24:56,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417780443] [2024-06-20 15:24:56,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417780443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:24:56,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:24:56,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:24:56,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451066644] [2024-06-20 15:24:56,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:24:56,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:24:56,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:24:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:24:56,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:24:56,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:24:56,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 547 transitions, 7158 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:24:56,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:24:56,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:24:56,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:24:57,810 INFO L124 PetriNetUnfolderBase]: 3568/6102 cut-off events. [2024-06-20 15:24:57,810 INFO L125 PetriNetUnfolderBase]: For 535177/535180 co-relation queries the response was YES. [2024-06-20 15:24:57,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40121 conditions, 6102 events. 3568/6102 cut-off events. For 535177/535180 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 42924 event pairs, 691 based on Foata normal form. 12/6104 useless extension candidates. Maximal degree in co-relation 39933. Up to 5228 conditions per place. [2024-06-20 15:24:57,896 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 446 selfloop transitions, 131 changer transitions 0/585 dead transitions. [2024-06-20 15:24:57,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 585 transitions, 8432 flow [2024-06-20 15:24:57,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:24:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:24:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-20 15:24:57,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314363143631436 [2024-06-20 15:24:57,897 INFO L175 Difference]: Start difference. First operand has 430 places, 547 transitions, 7158 flow. Second operand 9 states and 233 transitions. [2024-06-20 15:24:57,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 585 transitions, 8432 flow [2024-06-20 15:25:00,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 585 transitions, 8171 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:25:00,650 INFO L231 Difference]: Finished difference. Result has 432 places, 547 transitions, 7174 flow [2024-06-20 15:25:00,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6897, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7174, PETRI_PLACES=432, PETRI_TRANSITIONS=547} [2024-06-20 15:25:00,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 15:25:00,651 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 547 transitions, 7174 flow [2024-06-20 15:25:00,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:00,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:00,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-20 15:25:00,651 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:00,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 401353383, now seen corresponding path program 19 times [2024-06-20 15:25:00,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:00,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722621638] [2024-06-20 15:25:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:00,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:00,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:00,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:00,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722621638] [2024-06-20 15:25:00,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722621638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:00,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:00,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:00,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769240806] [2024-06-20 15:25:00,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:00,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:00,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:00,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:00,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:00,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:00,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 547 transitions, 7174 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:00,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:00,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:00,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:02,019 INFO L124 PetriNetUnfolderBase]: 3545/6074 cut-off events. [2024-06-20 15:25:02,020 INFO L125 PetriNetUnfolderBase]: For 472844/472844 co-relation queries the response was YES. [2024-06-20 15:25:02,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38612 conditions, 6074 events. 3545/6074 cut-off events. For 472844/472844 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 42821 event pairs, 686 based on Foata normal form. 10/6079 useless extension candidates. Maximal degree in co-relation 38424. Up to 5163 conditions per place. [2024-06-20 15:25:02,115 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 451 selfloop transitions, 123 changer transitions 0/582 dead transitions. [2024-06-20 15:25:02,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 582 transitions, 8434 flow [2024-06-20 15:25:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:25:02,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:25:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-20 15:25:02,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6205962059620597 [2024-06-20 15:25:02,117 INFO L175 Difference]: Start difference. First operand has 432 places, 547 transitions, 7174 flow. Second operand 9 states and 229 transitions. [2024-06-20 15:25:02,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 582 transitions, 8434 flow [2024-06-20 15:25:04,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 582 transitions, 8132 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-20 15:25:04,575 INFO L231 Difference]: Finished difference. Result has 432 places, 547 transitions, 7134 flow [2024-06-20 15:25:04,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6872, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7134, PETRI_PLACES=432, PETRI_TRANSITIONS=547} [2024-06-20 15:25:04,576 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-20 15:25:04,576 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 547 transitions, 7134 flow [2024-06-20 15:25:04,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:04,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:04,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:04,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-20 15:25:04,577 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:04,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:04,577 INFO L85 PathProgramCache]: Analyzing trace with hash 667377093, now seen corresponding path program 20 times [2024-06-20 15:25:04,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:04,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777237846] [2024-06-20 15:25:04,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:04,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:04,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:04,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:04,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:04,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777237846] [2024-06-20 15:25:04,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777237846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:04,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:04,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:04,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238741025] [2024-06-20 15:25:04,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:04,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:04,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:04,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:04,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:04,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:04,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 547 transitions, 7134 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:04,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:04,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:04,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:05,921 INFO L124 PetriNetUnfolderBase]: 3515/6041 cut-off events. [2024-06-20 15:25:05,921 INFO L125 PetriNetUnfolderBase]: For 404356/404356 co-relation queries the response was YES. [2024-06-20 15:25:05,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36991 conditions, 6041 events. 3515/6041 cut-off events. For 404356/404356 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 42550 event pairs, 550 based on Foata normal form. 10/6046 useless extension candidates. Maximal degree in co-relation 36803. Up to 4278 conditions per place. [2024-06-20 15:25:06,012 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 131 changer transitions 0/578 dead transitions. [2024-06-20 15:25:06,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 578 transitions, 8400 flow [2024-06-20 15:25:06,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:06,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:06,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-20 15:25:06,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-20 15:25:06,013 INFO L175 Difference]: Start difference. First operand has 432 places, 547 transitions, 7134 flow. Second operand 7 states and 184 transitions. [2024-06-20 15:25:06,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 578 transitions, 8400 flow [2024-06-20 15:25:08,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 578 transitions, 8110 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-06-20 15:25:08,809 INFO L231 Difference]: Finished difference. Result has 429 places, 547 transitions, 7124 flow [2024-06-20 15:25:08,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6844, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7124, PETRI_PLACES=429, PETRI_TRANSITIONS=547} [2024-06-20 15:25:08,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-20 15:25:08,809 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 547 transitions, 7124 flow [2024-06-20 15:25:08,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:08,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:08,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:08,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-20 15:25:08,810 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:08,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:08,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1732941011, now seen corresponding path program 3 times [2024-06-20 15:25:08,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:08,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767432141] [2024-06-20 15:25:08,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:08,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:08,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:08,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:08,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:08,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767432141] [2024-06-20 15:25:08,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767432141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:08,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:08,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:08,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135471690] [2024-06-20 15:25:08,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:08,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:08,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:08,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:08,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:08,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:08,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 547 transitions, 7124 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:08,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:08,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:08,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:10,111 INFO L124 PetriNetUnfolderBase]: 3536/6048 cut-off events. [2024-06-20 15:25:10,112 INFO L125 PetriNetUnfolderBase]: For 366106/366106 co-relation queries the response was YES. [2024-06-20 15:25:10,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37609 conditions, 6048 events. 3536/6048 cut-off events. For 366106/366106 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 42540 event pairs, 666 based on Foata normal form. 2/6045 useless extension candidates. Maximal degree in co-relation 37422. Up to 5304 conditions per place. [2024-06-20 15:25:10,205 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 498 selfloop transitions, 61 changer transitions 0/567 dead transitions. [2024-06-20 15:25:10,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 567 transitions, 8610 flow [2024-06-20 15:25:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:10,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 15:25:10,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:25:10,207 INFO L175 Difference]: Start difference. First operand has 429 places, 547 transitions, 7124 flow. Second operand 6 states and 146 transitions. [2024-06-20 15:25:10,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 567 transitions, 8610 flow [2024-06-20 15:25:12,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 567 transitions, 8262 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:12,624 INFO L231 Difference]: Finished difference. Result has 427 places, 551 transitions, 7029 flow [2024-06-20 15:25:12,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6778, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7029, PETRI_PLACES=427, PETRI_TRANSITIONS=551} [2024-06-20 15:25:12,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 15:25:12,625 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 551 transitions, 7029 flow [2024-06-20 15:25:12,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:12,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:12,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:12,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-20 15:25:12,625 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:12,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:12,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1311981539, now seen corresponding path program 4 times [2024-06-20 15:25:12,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:12,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226615049] [2024-06-20 15:25:12,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:12,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:12,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:12,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226615049] [2024-06-20 15:25:12,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226615049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:12,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:12,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:12,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855169475] [2024-06-20 15:25:12,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:12,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:12,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:12,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:12,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:12,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:12,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 551 transitions, 7029 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:12,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:12,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:12,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:13,917 INFO L124 PetriNetUnfolderBase]: 3544/6077 cut-off events. [2024-06-20 15:25:13,917 INFO L125 PetriNetUnfolderBase]: For 363116/363119 co-relation queries the response was YES. [2024-06-20 15:25:13,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37127 conditions, 6077 events. 3544/6077 cut-off events. For 363116/363119 co-relation queries the response was YES. Maximal size of possible extension queue 523. Compared 42826 event pairs, 686 based on Foata normal form. 4/6075 useless extension candidates. Maximal degree in co-relation 36940. Up to 5383 conditions per place. [2024-06-20 15:25:14,006 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 505 selfloop transitions, 60 changer transitions 0/573 dead transitions. [2024-06-20 15:25:14,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 573 transitions, 8271 flow [2024-06-20 15:25:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-20 15:25:14,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:25:14,007 INFO L175 Difference]: Start difference. First operand has 427 places, 551 transitions, 7029 flow. Second operand 6 states and 153 transitions. [2024-06-20 15:25:14,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 573 transitions, 8271 flow [2024-06-20 15:25:16,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 573 transitions, 8143 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:16,850 INFO L231 Difference]: Finished difference. Result has 431 places, 553 transitions, 7092 flow [2024-06-20 15:25:16,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6915, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7092, PETRI_PLACES=431, PETRI_TRANSITIONS=553} [2024-06-20 15:25:16,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-20 15:25:16,851 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 553 transitions, 7092 flow [2024-06-20 15:25:16,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:16,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:16,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:16,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-20 15:25:16,851 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:16,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:16,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1303410659, now seen corresponding path program 5 times [2024-06-20 15:25:16,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:16,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718839322] [2024-06-20 15:25:16,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:16,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:16,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:16,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718839322] [2024-06-20 15:25:16,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718839322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:16,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:16,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:16,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077731335] [2024-06-20 15:25:16,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:16,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:16,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:16,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:16,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 553 transitions, 7092 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:16,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:16,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:16,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:18,128 INFO L124 PetriNetUnfolderBase]: 3552/6085 cut-off events. [2024-06-20 15:25:18,128 INFO L125 PetriNetUnfolderBase]: For 369200/369203 co-relation queries the response was YES. [2024-06-20 15:25:18,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37333 conditions, 6085 events. 3552/6085 cut-off events. For 369200/369203 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42867 event pairs, 682 based on Foata normal form. 4/6083 useless extension candidates. Maximal degree in co-relation 37144. Up to 5366 conditions per place. [2024-06-20 15:25:18,226 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 503 selfloop transitions, 65 changer transitions 0/576 dead transitions. [2024-06-20 15:25:18,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 576 transitions, 8595 flow [2024-06-20 15:25:18,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:18,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-20 15:25:18,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:25:18,228 INFO L175 Difference]: Start difference. First operand has 431 places, 553 transitions, 7092 flow. Second operand 6 states and 150 transitions. [2024-06-20 15:25:18,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 576 transitions, 8595 flow [2024-06-20 15:25:21,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 576 transitions, 8438 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:21,051 INFO L231 Difference]: Finished difference. Result has 434 places, 557 transitions, 7193 flow [2024-06-20 15:25:21,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6935, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7193, PETRI_PLACES=434, PETRI_TRANSITIONS=557} [2024-06-20 15:25:21,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 392 predicate places. [2024-06-20 15:25:21,052 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 557 transitions, 7193 flow [2024-06-20 15:25:21,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:21,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:21,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:21,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-20 15:25:21,052 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:21,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:21,053 INFO L85 PathProgramCache]: Analyzing trace with hash 175621153, now seen corresponding path program 6 times [2024-06-20 15:25:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285993381] [2024-06-20 15:25:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:21,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:21,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:21,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285993381] [2024-06-20 15:25:21,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285993381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:21,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:21,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:21,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700424495] [2024-06-20 15:25:21,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:21,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:21,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:21,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:21,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:21,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:21,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 557 transitions, 7193 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:21,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:21,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:21,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:22,454 INFO L124 PetriNetUnfolderBase]: 3547/6077 cut-off events. [2024-06-20 15:25:22,454 INFO L125 PetriNetUnfolderBase]: For 363757/363757 co-relation queries the response was YES. [2024-06-20 15:25:22,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37162 conditions, 6077 events. 3547/6077 cut-off events. For 363757/363757 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 42871 event pairs, 683 based on Foata normal form. 2/6074 useless extension candidates. Maximal degree in co-relation 36971. Up to 5382 conditions per place. [2024-06-20 15:25:22,548 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 509 selfloop transitions, 57 changer transitions 0/574 dead transitions. [2024-06-20 15:25:22,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 574 transitions, 8367 flow [2024-06-20 15:25:22,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:22,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:22,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-20 15:25:22,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-20 15:25:22,550 INFO L175 Difference]: Start difference. First operand has 434 places, 557 transitions, 7193 flow. Second operand 6 states and 149 transitions. [2024-06-20 15:25:22,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 574 transitions, 8367 flow [2024-06-20 15:25:25,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 574 transitions, 8169 flow, removed 63 selfloop flow, removed 2 redundant places. [2024-06-20 15:25:25,103 INFO L231 Difference]: Finished difference. Result has 438 places, 557 transitions, 7117 flow [2024-06-20 15:25:25,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6995, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7117, PETRI_PLACES=438, PETRI_TRANSITIONS=557} [2024-06-20 15:25:25,104 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 396 predicate places. [2024-06-20 15:25:25,104 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 557 transitions, 7117 flow [2024-06-20 15:25:25,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:25,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:25,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:25,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-20 15:25:25,105 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:25,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:25,105 INFO L85 PathProgramCache]: Analyzing trace with hash 454559773, now seen corresponding path program 7 times [2024-06-20 15:25:25,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790209644] [2024-06-20 15:25:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:25,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790209644] [2024-06-20 15:25:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790209644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:25,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:25,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512216893] [2024-06-20 15:25:25,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:25,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:25,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:25,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:25,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 557 transitions, 7117 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:25,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:25,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:25,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:26,377 INFO L124 PetriNetUnfolderBase]: 3555/6082 cut-off events. [2024-06-20 15:25:26,378 INFO L125 PetriNetUnfolderBase]: For 369623/369626 co-relation queries the response was YES. [2024-06-20 15:25:26,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37261 conditions, 6082 events. 3555/6082 cut-off events. For 369623/369626 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 42959 event pairs, 636 based on Foata normal form. 4/6079 useless extension candidates. Maximal degree in co-relation 37068. Up to 5263 conditions per place. [2024-06-20 15:25:26,474 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 498 selfloop transitions, 70 changer transitions 0/576 dead transitions. [2024-06-20 15:25:26,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 576 transitions, 8644 flow [2024-06-20 15:25:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:26,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:26,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-20 15:25:26,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-20 15:25:26,475 INFO L175 Difference]: Start difference. First operand has 438 places, 557 transitions, 7117 flow. Second operand 6 states and 143 transitions. [2024-06-20 15:25:26,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 576 transitions, 8644 flow [2024-06-20 15:25:29,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 576 transitions, 8511 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:29,829 INFO L231 Difference]: Finished difference. Result has 440 places, 562 transitions, 7286 flow [2024-06-20 15:25:29,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6984, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7286, PETRI_PLACES=440, PETRI_TRANSITIONS=562} [2024-06-20 15:25:29,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 15:25:29,830 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 562 transitions, 7286 flow [2024-06-20 15:25:29,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:29,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:29,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:29,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-20 15:25:29,830 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:29,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:29,831 INFO L85 PathProgramCache]: Analyzing trace with hash 461226013, now seen corresponding path program 8 times [2024-06-20 15:25:29,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:29,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697822118] [2024-06-20 15:25:29,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:29,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:29,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:29,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:29,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:29,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697822118] [2024-06-20 15:25:29,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697822118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:29,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:29,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:25:29,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872305499] [2024-06-20 15:25:29,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:29,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:25:29,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:29,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:25:29,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:25:29,966 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:29,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 562 transitions, 7286 flow. Second operand has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:29,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:29,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:29,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:31,124 INFO L124 PetriNetUnfolderBase]: 3550/6075 cut-off events. [2024-06-20 15:25:31,124 INFO L125 PetriNetUnfolderBase]: For 364061/364064 co-relation queries the response was YES. [2024-06-20 15:25:31,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37179 conditions, 6075 events. 3550/6075 cut-off events. For 364061/364064 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 42868 event pairs, 636 based on Foata normal form. 4/6072 useless extension candidates. Maximal degree in co-relation 36984. Up to 5259 conditions per place. [2024-06-20 15:25:31,218 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 499 selfloop transitions, 69 changer transitions 0/576 dead transitions. [2024-06-20 15:25:31,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 576 transitions, 8491 flow [2024-06-20 15:25:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:25:31,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:25:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 15:25:31,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-20 15:25:31,220 INFO L175 Difference]: Start difference. First operand has 440 places, 562 transitions, 7286 flow. Second operand 6 states and 142 transitions. [2024-06-20 15:25:31,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 576 transitions, 8491 flow [2024-06-20 15:25:34,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 576 transitions, 8225 flow, removed 77 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:34,767 INFO L231 Difference]: Finished difference. Result has 443 places, 563 transitions, 7202 flow [2024-06-20 15:25:34,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7050, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7202, PETRI_PLACES=443, PETRI_TRANSITIONS=563} [2024-06-20 15:25:34,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-20 15:25:34,768 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 563 transitions, 7202 flow [2024-06-20 15:25:34,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.142857142857142) internal successors, (120), 7 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:34,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:34,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:34,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-20 15:25:34,769 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:34,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:34,769 INFO L85 PathProgramCache]: Analyzing trace with hash 423617980, now seen corresponding path program 1 times [2024-06-20 15:25:34,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:34,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781705981] [2024-06-20 15:25:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:34,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:34,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:34,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:34,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:34,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781705981] [2024-06-20 15:25:34,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781705981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:34,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:34,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:34,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251134176] [2024-06-20 15:25:34,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:34,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:34,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:34,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:34,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:34,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:34,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 563 transitions, 7202 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:34,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:34,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:34,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:36,103 INFO L124 PetriNetUnfolderBase]: 3571/6114 cut-off events. [2024-06-20 15:25:36,104 INFO L125 PetriNetUnfolderBase]: For 372001/372001 co-relation queries the response was YES. [2024-06-20 15:25:36,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37386 conditions, 6114 events. 3571/6114 cut-off events. For 372001/372001 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 43228 event pairs, 697 based on Foata normal form. 1/6107 useless extension candidates. Maximal degree in co-relation 37190. Up to 5148 conditions per place. [2024-06-20 15:25:36,203 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 164 changer transitions 0/590 dead transitions. [2024-06-20 15:25:36,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 590 transitions, 8767 flow [2024-06-20 15:25:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:36,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-20 15:25:36,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-20 15:25:36,204 INFO L175 Difference]: Start difference. First operand has 443 places, 563 transitions, 7202 flow. Second operand 7 states and 178 transitions. [2024-06-20 15:25:36,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 590 transitions, 8767 flow [2024-06-20 15:25:39,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 590 transitions, 8652 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:25:39,689 INFO L231 Difference]: Finished difference. Result has 448 places, 572 transitions, 7670 flow [2024-06-20 15:25:39,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7670, PETRI_PLACES=448, PETRI_TRANSITIONS=572} [2024-06-20 15:25:39,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-20 15:25:39,689 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 572 transitions, 7670 flow [2024-06-20 15:25:39,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:39,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-20 15:25:39,690 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:39,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash 465573038, now seen corresponding path program 2 times [2024-06-20 15:25:39,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:39,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437832518] [2024-06-20 15:25:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:39,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:39,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:39,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437832518] [2024-06-20 15:25:39,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437832518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:39,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:39,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:39,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58476594] [2024-06-20 15:25:39,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:39,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:39,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:39,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:39,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:39,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:39,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 572 transitions, 7670 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:39,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:39,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:39,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:41,085 INFO L124 PetriNetUnfolderBase]: 3576/6123 cut-off events. [2024-06-20 15:25:41,085 INFO L125 PetriNetUnfolderBase]: For 379671/379671 co-relation queries the response was YES. [2024-06-20 15:25:41,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37979 conditions, 6123 events. 3576/6123 cut-off events. For 379671/379671 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 43258 event pairs, 697 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 37781. Up to 5311 conditions per place. [2024-06-20 15:25:41,184 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 474 selfloop transitions, 108 changer transitions 0/590 dead transitions. [2024-06-20 15:25:41,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 590 transitions, 9148 flow [2024-06-20 15:25:41,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:25:41,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:25:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:25:41,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:25:41,185 INFO L175 Difference]: Start difference. First operand has 448 places, 572 transitions, 7670 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:25:41,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 590 transitions, 9148 flow [2024-06-20 15:25:44,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 590 transitions, 8890 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:25:44,980 INFO L231 Difference]: Finished difference. Result has 450 places, 575 transitions, 7697 flow [2024-06-20 15:25:44,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7417, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7697, PETRI_PLACES=450, PETRI_TRANSITIONS=575} [2024-06-20 15:25:44,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-20 15:25:44,981 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 575 transitions, 7697 flow [2024-06-20 15:25:44,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:44,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:44,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:44,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-20 15:25:44,982 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:44,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:44,982 INFO L85 PathProgramCache]: Analyzing trace with hash 38970334, now seen corresponding path program 3 times [2024-06-20 15:25:44,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:44,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355472073] [2024-06-20 15:25:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:44,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:44,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:45,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:45,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355472073] [2024-06-20 15:25:45,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355472073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:45,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:45,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896243836] [2024-06-20 15:25:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:45,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:45,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:45,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:45,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 575 transitions, 7697 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:45,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:45,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:45,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:46,600 INFO L124 PetriNetUnfolderBase]: 3573/6119 cut-off events. [2024-06-20 15:25:46,601 INFO L125 PetriNetUnfolderBase]: For 373552/373552 co-relation queries the response was YES. [2024-06-20 15:25:46,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37726 conditions, 6119 events. 3573/6119 cut-off events. For 373552/373552 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 43232 event pairs, 697 based on Foata normal form. 1/6112 useless extension candidates. Maximal degree in co-relation 37528. Up to 5308 conditions per place. [2024-06-20 15:25:46,686 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 115 changer transitions 0/591 dead transitions. [2024-06-20 15:25:46,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 591 transitions, 8901 flow [2024-06-20 15:25:46,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:25:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:25:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:25:46,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:25:46,687 INFO L175 Difference]: Start difference. First operand has 450 places, 575 transitions, 7697 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:25:46,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 591 transitions, 8901 flow [2024-06-20 15:25:51,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 591 transitions, 8709 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 15:25:51,045 INFO L231 Difference]: Finished difference. Result has 455 places, 575 transitions, 7746 flow [2024-06-20 15:25:51,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7505, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7746, PETRI_PLACES=455, PETRI_TRANSITIONS=575} [2024-06-20 15:25:51,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 15:25:51,046 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 575 transitions, 7746 flow [2024-06-20 15:25:51,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:51,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:51,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:51,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-20 15:25:51,047 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:51,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:51,047 INFO L85 PathProgramCache]: Analyzing trace with hash 243349498, now seen corresponding path program 4 times [2024-06-20 15:25:51,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:51,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095263295] [2024-06-20 15:25:51,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:51,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:51,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:51,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:51,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:51,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095263295] [2024-06-20 15:25:51,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095263295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:51,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:51,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:51,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264148830] [2024-06-20 15:25:51,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:51,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:51,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:51,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:51,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:51,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:51,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 575 transitions, 7746 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:51,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:51,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:51,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:52,533 INFO L124 PetriNetUnfolderBase]: 3586/6141 cut-off events. [2024-06-20 15:25:52,534 INFO L125 PetriNetUnfolderBase]: For 386669/386669 co-relation queries the response was YES. [2024-06-20 15:25:52,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38075 conditions, 6141 events. 3586/6141 cut-off events. For 386669/386669 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43477 event pairs, 697 based on Foata normal form. 1/6134 useless extension candidates. Maximal degree in co-relation 37876. Up to 5202 conditions per place. [2024-06-20 15:25:52,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 413 selfloop transitions, 180 changer transitions 0/601 dead transitions. [2024-06-20 15:25:52,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 601 transitions, 9546 flow [2024-06-20 15:25:52,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:25:52,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:25:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-20 15:25:52,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-20 15:25:52,645 INFO L175 Difference]: Start difference. First operand has 455 places, 575 transitions, 7746 flow. Second operand 8 states and 199 transitions. [2024-06-20 15:25:52,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 601 transitions, 9546 flow [2024-06-20 15:25:56,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 601 transitions, 9290 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-20 15:25:56,677 INFO L231 Difference]: Finished difference. Result has 455 places, 581 transitions, 7980 flow [2024-06-20 15:25:56,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7490, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=575, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7980, PETRI_PLACES=455, PETRI_TRANSITIONS=581} [2024-06-20 15:25:56,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 15:25:56,678 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 581 transitions, 7980 flow [2024-06-20 15:25:56,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:56,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:25:56,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:25:56,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-20 15:25:56,679 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:25:56,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:25:56,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1517342750, now seen corresponding path program 5 times [2024-06-20 15:25:56,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:25:56,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294505450] [2024-06-20 15:25:56,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:25:56,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:25:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:25:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:25:56,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:25:56,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294505450] [2024-06-20 15:25:56,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294505450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:25:56,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:25:56,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:25:56,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737081389] [2024-06-20 15:25:56,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:25:56,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:25:56,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:25:56,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:25:56,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:25:56,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:25:56,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 581 transitions, 7980 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:25:56,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:25:56,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:25:56,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:25:58,155 INFO L124 PetriNetUnfolderBase]: 3583/6137 cut-off events. [2024-06-20 15:25:58,155 INFO L125 PetriNetUnfolderBase]: For 386736/386736 co-relation queries the response was YES. [2024-06-20 15:25:58,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38194 conditions, 6137 events. 3583/6137 cut-off events. For 386736/386736 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43450 event pairs, 694 based on Foata normal form. 1/6130 useless extension candidates. Maximal degree in co-relation 37994. Up to 5199 conditions per place. [2024-06-20 15:25:58,254 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 405 selfloop transitions, 189 changer transitions 0/602 dead transitions. [2024-06-20 15:25:58,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 602 transitions, 9448 flow [2024-06-20 15:25:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:25:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:25:58,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-20 15:25:58,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:25:58,255 INFO L175 Difference]: Start difference. First operand has 455 places, 581 transitions, 7980 flow. Second operand 10 states and 240 transitions. [2024-06-20 15:25:58,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 602 transitions, 9448 flow [2024-06-20 15:26:01,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 602 transitions, 9067 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:01,456 INFO L231 Difference]: Finished difference. Result has 458 places, 581 transitions, 7992 flow [2024-06-20 15:26:01,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7603, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7992, PETRI_PLACES=458, PETRI_TRANSITIONS=581} [2024-06-20 15:26:01,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-20 15:26:01,456 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 581 transitions, 7992 flow [2024-06-20 15:26:01,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:01,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:01,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:01,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-20 15:26:01,457 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:01,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:01,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1524699980, now seen corresponding path program 6 times [2024-06-20 15:26:01,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:01,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341248898] [2024-06-20 15:26:01,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:01,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:01,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:01,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341248898] [2024-06-20 15:26:01,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341248898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:01,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:01,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:01,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917500121] [2024-06-20 15:26:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:01,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:01,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:01,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:01,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:01,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:01,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 581 transitions, 7992 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:01,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:01,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:01,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:02,861 INFO L124 PetriNetUnfolderBase]: 3580/6133 cut-off events. [2024-06-20 15:26:02,862 INFO L125 PetriNetUnfolderBase]: For 373543/373543 co-relation queries the response was YES. [2024-06-20 15:26:02,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37996 conditions, 6133 events. 3580/6133 cut-off events. For 373543/373543 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 43441 event pairs, 697 based on Foata normal form. 1/6126 useless extension candidates. Maximal degree in co-relation 37797. Up to 5196 conditions per place. [2024-06-20 15:26:02,970 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 164 changer transitions 0/597 dead transitions. [2024-06-20 15:26:02,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 597 transitions, 9210 flow [2024-06-20 15:26:02,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:26:02,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:26:02,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-20 15:26:02,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-20 15:26:02,972 INFO L175 Difference]: Start difference. First operand has 458 places, 581 transitions, 7992 flow. Second operand 6 states and 155 transitions. [2024-06-20 15:26:02,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 597 transitions, 9210 flow [2024-06-20 15:26:06,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 597 transitions, 8716 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-20 15:26:06,810 INFO L231 Difference]: Finished difference. Result has 454 places, 581 transitions, 7856 flow [2024-06-20 15:26:06,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7498, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7856, PETRI_PLACES=454, PETRI_TRANSITIONS=581} [2024-06-20 15:26:06,811 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-20 15:26:06,811 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 581 transitions, 7856 flow [2024-06-20 15:26:06,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:06,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:06,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:06,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-20 15:26:06,811 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:06,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash 266260050, now seen corresponding path program 7 times [2024-06-20 15:26:06,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:06,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364945665] [2024-06-20 15:26:06,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:06,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:06,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:06,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364945665] [2024-06-20 15:26:06,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364945665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:06,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:06,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:06,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137309017] [2024-06-20 15:26:06,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:06,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:06,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:06,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:06,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:06,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 581 transitions, 7856 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:06,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:06,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:06,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:08,257 INFO L124 PetriNetUnfolderBase]: 3601/6168 cut-off events. [2024-06-20 15:26:08,258 INFO L125 PetriNetUnfolderBase]: For 386727/386727 co-relation queries the response was YES. [2024-06-20 15:26:08,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38315 conditions, 6168 events. 3601/6168 cut-off events. For 386727/386727 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 43699 event pairs, 697 based on Foata normal form. 1/6161 useless extension candidates. Maximal degree in co-relation 38116. Up to 4878 conditions per place. [2024-06-20 15:26:08,358 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 271 changer transitions 0/613 dead transitions. [2024-06-20 15:26:08,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 613 transitions, 9729 flow [2024-06-20 15:26:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:08,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:08,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:26:08,359 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:26:08,359 INFO L175 Difference]: Start difference. First operand has 454 places, 581 transitions, 7856 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:26:08,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 613 transitions, 9729 flow [2024-06-20 15:26:11,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 613 transitions, 9358 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:11,731 INFO L231 Difference]: Finished difference. Result has 455 places, 590 transitions, 8193 flow [2024-06-20 15:26:11,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7493, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=262, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8193, PETRI_PLACES=455, PETRI_TRANSITIONS=590} [2024-06-20 15:26:11,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-20 15:26:11,731 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 590 transitions, 8193 flow [2024-06-20 15:26:11,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:11,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:11,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:11,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-20 15:26:11,732 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:11,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:11,732 INFO L85 PathProgramCache]: Analyzing trace with hash 269984700, now seen corresponding path program 8 times [2024-06-20 15:26:11,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:11,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863549789] [2024-06-20 15:26:11,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:11,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:11,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:11,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863549789] [2024-06-20 15:26:11,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863549789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:11,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:11,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:11,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546362024] [2024-06-20 15:26:11,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:11,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:11,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:11,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:11,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:11,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:11,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 590 transitions, 8193 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:11,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:11,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:11,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:13,248 INFO L124 PetriNetUnfolderBase]: 3614/6190 cut-off events. [2024-06-20 15:26:13,248 INFO L125 PetriNetUnfolderBase]: For 388949/388949 co-relation queries the response was YES. [2024-06-20 15:26:13,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38779 conditions, 6190 events. 3614/6190 cut-off events. For 388949/388949 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43866 event pairs, 697 based on Foata normal form. 1/6183 useless extension candidates. Maximal degree in co-relation 38581. Up to 5321 conditions per place. [2024-06-20 15:26:13,336 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 480 selfloop transitions, 129 changer transitions 0/617 dead transitions. [2024-06-20 15:26:13,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 617 transitions, 9797 flow [2024-06-20 15:26:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:26:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:26:13,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 228 transitions. [2024-06-20 15:26:13,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-20 15:26:13,338 INFO L175 Difference]: Start difference. First operand has 455 places, 590 transitions, 8193 flow. Second operand 10 states and 228 transitions. [2024-06-20 15:26:13,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 617 transitions, 9797 flow [2024-06-20 15:26:16,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 617 transitions, 9170 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:16,426 INFO L231 Difference]: Finished difference. Result has 459 places, 596 transitions, 7946 flow [2024-06-20 15:26:16,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7596, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7946, PETRI_PLACES=459, PETRI_TRANSITIONS=596} [2024-06-20 15:26:16,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-20 15:26:16,428 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 596 transitions, 7946 flow [2024-06-20 15:26:16,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:16,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:16,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:16,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-20 15:26:16,428 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:16,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:16,429 INFO L85 PathProgramCache]: Analyzing trace with hash 269979120, now seen corresponding path program 9 times [2024-06-20 15:26:16,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:16,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988922984] [2024-06-20 15:26:16,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:16,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:16,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:16,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:16,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988922984] [2024-06-20 15:26:16,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988922984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:16,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:16,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:16,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985122480] [2024-06-20 15:26:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:16,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:16,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:16,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:16,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 596 transitions, 7946 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:16,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:16,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:16,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:17,824 INFO L124 PetriNetUnfolderBase]: 3611/6186 cut-off events. [2024-06-20 15:26:17,824 INFO L125 PetriNetUnfolderBase]: For 386534/386534 co-relation queries the response was YES. [2024-06-20 15:26:17,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37931 conditions, 6186 events. 3611/6186 cut-off events. For 386534/386534 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 43782 event pairs, 697 based on Foata normal form. 1/6179 useless extension candidates. Maximal degree in co-relation 37734. Up to 5318 conditions per place. [2024-06-20 15:26:17,931 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 479 selfloop transitions, 127 changer transitions 0/614 dead transitions. [2024-06-20 15:26:17,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 614 transitions, 9202 flow [2024-06-20 15:26:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:17,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:17,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 15:26:17,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-20 15:26:17,932 INFO L175 Difference]: Start difference. First operand has 459 places, 596 transitions, 7946 flow. Second operand 8 states and 191 transitions. [2024-06-20 15:26:17,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 614 transitions, 9202 flow [2024-06-20 15:26:21,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 614 transitions, 9031 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:21,449 INFO L231 Difference]: Finished difference. Result has 461 places, 596 transitions, 8036 flow [2024-06-20 15:26:21,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7775, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8036, PETRI_PLACES=461, PETRI_TRANSITIONS=596} [2024-06-20 15:26:21,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-20 15:26:21,449 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 596 transitions, 8036 flow [2024-06-20 15:26:21,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:21,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:21,450 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, 1] [2024-06-20 15:26:21,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-20 15:26:21,450 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:21,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:21,450 INFO L85 PathProgramCache]: Analyzing trace with hash -284483566, now seen corresponding path program 10 times [2024-06-20 15:26:21,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:21,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260367495] [2024-06-20 15:26:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:21,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:21,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:21,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260367495] [2024-06-20 15:26:21,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260367495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:21,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:21,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:21,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946393370] [2024-06-20 15:26:21,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:21,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:21,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:21,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:21,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:21,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:21,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 596 transitions, 8036 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:21,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:21,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:21,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:22,982 INFO L124 PetriNetUnfolderBase]: 3616/6195 cut-off events. [2024-06-20 15:26:22,982 INFO L125 PetriNetUnfolderBase]: For 392754/392754 co-relation queries the response was YES. [2024-06-20 15:26:23,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38277 conditions, 6195 events. 3616/6195 cut-off events. For 392754/392754 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 43870 event pairs, 697 based on Foata normal form. 1/6188 useless extension candidates. Maximal degree in co-relation 38078. Up to 4896 conditions per place. [2024-06-20 15:26:23,081 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 321 selfloop transitions, 293 changer transitions 0/622 dead transitions. [2024-06-20 15:26:23,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 622 transitions, 9820 flow [2024-06-20 15:26:23,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:23,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:26:23,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:26:23,083 INFO L175 Difference]: Start difference. First operand has 461 places, 596 transitions, 8036 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:26:23,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 622 transitions, 9820 flow [2024-06-20 15:26:27,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 622 transitions, 9566 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:27,482 INFO L231 Difference]: Finished difference. Result has 462 places, 599 transitions, 8416 flow [2024-06-20 15:26:27,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7782, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8416, PETRI_PLACES=462, PETRI_TRANSITIONS=599} [2024-06-20 15:26:27,483 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-20 15:26:27,483 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 599 transitions, 8416 flow [2024-06-20 15:26:27,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:27,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:27,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:27,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-20 15:26:27,484 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:27,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:27,484 INFO L85 PathProgramCache]: Analyzing trace with hash 552570780, now seen corresponding path program 11 times [2024-06-20 15:26:27,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:27,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156278300] [2024-06-20 15:26:27,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:27,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:27,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:27,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156278300] [2024-06-20 15:26:27,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156278300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:27,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:27,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:27,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912671642] [2024-06-20 15:26:27,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:27,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:27,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:27,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:27,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:27,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:27,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 599 transitions, 8416 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:27,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:27,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:28,863 INFO L124 PetriNetUnfolderBase]: 3621/6204 cut-off events. [2024-06-20 15:26:28,863 INFO L125 PetriNetUnfolderBase]: For 401230/401230 co-relation queries the response was YES. [2024-06-20 15:26:28,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38861 conditions, 6204 events. 3621/6204 cut-off events. For 401230/401230 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43973 event pairs, 697 based on Foata normal form. 1/6197 useless extension candidates. Maximal degree in co-relation 38661. Up to 4902 conditions per place. [2024-06-20 15:26:28,962 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 288 changer transitions 0/622 dead transitions. [2024-06-20 15:26:28,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 622 transitions, 10202 flow [2024-06-20 15:26:28,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:28,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:26:28,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:26:28,963 INFO L175 Difference]: Start difference. First operand has 462 places, 599 transitions, 8416 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:26:28,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 622 transitions, 10202 flow [2024-06-20 15:26:33,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 622 transitions, 9542 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:26:33,180 INFO L231 Difference]: Finished difference. Result has 464 places, 602 transitions, 8387 flow [2024-06-20 15:26:33,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7762, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=285, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8387, PETRI_PLACES=464, PETRI_TRANSITIONS=602} [2024-06-20 15:26:33,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 15:26:33,180 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 602 transitions, 8387 flow [2024-06-20 15:26:33,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:33,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:33,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:33,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-20 15:26:33,181 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:33,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:33,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1615306138, now seen corresponding path program 12 times [2024-06-20 15:26:33,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:33,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365699498] [2024-06-20 15:26:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:33,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:33,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:33,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:33,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365699498] [2024-06-20 15:26:33,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365699498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:33,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:33,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:33,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464239280] [2024-06-20 15:26:33,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:33,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:33,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:33,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:33,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:33,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:33,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 602 transitions, 8387 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:33,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:33,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:33,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:34,572 INFO L124 PetriNetUnfolderBase]: 3618/6200 cut-off events. [2024-06-20 15:26:34,573 INFO L125 PetriNetUnfolderBase]: For 400116/400116 co-relation queries the response was YES. [2024-06-20 15:26:34,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38703 conditions, 6200 events. 3618/6200 cut-off events. For 400116/400116 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 43950 event pairs, 697 based on Foata normal form. 1/6193 useless extension candidates. Maximal degree in co-relation 38502. Up to 4899 conditions per place. [2024-06-20 15:26:34,672 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 317 selfloop transitions, 296 changer transitions 0/621 dead transitions. [2024-06-20 15:26:34,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 621 transitions, 9893 flow [2024-06-20 15:26:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:34,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:26:34,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:26:34,674 INFO L175 Difference]: Start difference. First operand has 464 places, 602 transitions, 8387 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:26:34,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 621 transitions, 9893 flow [2024-06-20 15:26:38,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 621 transitions, 9313 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-20 15:26:38,646 INFO L231 Difference]: Finished difference. Result has 467 places, 602 transitions, 8405 flow [2024-06-20 15:26:38,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=296, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8405, PETRI_PLACES=467, PETRI_TRANSITIONS=602} [2024-06-20 15:26:38,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 425 predicate places. [2024-06-20 15:26:38,647 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 602 transitions, 8405 flow [2024-06-20 15:26:38,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:38,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:38,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:38,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-20 15:26:38,647 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:38,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:38,647 INFO L85 PathProgramCache]: Analyzing trace with hash -587102824, now seen corresponding path program 13 times [2024-06-20 15:26:38,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:38,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784220224] [2024-06-20 15:26:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:38,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:38,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:38,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784220224] [2024-06-20 15:26:38,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784220224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:38,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:38,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:38,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40234139] [2024-06-20 15:26:38,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:38,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:38,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:38,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:38,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:38,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:38,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 602 transitions, 8405 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:38,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:38,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:40,179 INFO L124 PetriNetUnfolderBase]: 3631/6222 cut-off events. [2024-06-20 15:26:40,179 INFO L125 PetriNetUnfolderBase]: For 413548/413548 co-relation queries the response was YES. [2024-06-20 15:26:40,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39001 conditions, 6222 events. 3631/6222 cut-off events. For 413548/413548 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 44166 event pairs, 697 based on Foata normal form. 1/6215 useless extension candidates. Maximal degree in co-relation 38799. Up to 5237 conditions per place. [2024-06-20 15:26:40,273 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 424 selfloop transitions, 195 changer transitions 0/627 dead transitions. [2024-06-20 15:26:40,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 627 transitions, 10257 flow [2024-06-20 15:26:40,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:26:40,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:26:40,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-20 15:26:40,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5756097560975609 [2024-06-20 15:26:40,274 INFO L175 Difference]: Start difference. First operand has 467 places, 602 transitions, 8405 flow. Second operand 10 states and 236 transitions. [2024-06-20 15:26:40,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 627 transitions, 10257 flow [2024-06-20 15:26:43,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 627 transitions, 8991 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-20 15:26:43,843 INFO L231 Difference]: Finished difference. Result has 466 places, 608 transitions, 7633 flow [2024-06-20 15:26:43,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7169, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7633, PETRI_PLACES=466, PETRI_TRANSITIONS=608} [2024-06-20 15:26:43,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-20 15:26:43,844 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 608 transitions, 7633 flow [2024-06-20 15:26:43,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:43,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:43,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:43,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-20 15:26:43,845 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:43,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:43,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1758989278, now seen corresponding path program 14 times [2024-06-20 15:26:43,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:43,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980414105] [2024-06-20 15:26:43,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:43,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:43,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:43,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980414105] [2024-06-20 15:26:43,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980414105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:43,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:43,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:43,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311547689] [2024-06-20 15:26:43,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:43,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:43,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:43,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:43,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:44,000 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:44,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 608 transitions, 7633 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:44,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:44,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:44,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:45,286 INFO L124 PetriNetUnfolderBase]: 3644/6244 cut-off events. [2024-06-20 15:26:45,287 INFO L125 PetriNetUnfolderBase]: For 420156/420156 co-relation queries the response was YES. [2024-06-20 15:26:45,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38582 conditions, 6244 events. 3644/6244 cut-off events. For 420156/420156 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44284 event pairs, 697 based on Foata normal form. 1/6237 useless extension candidates. Maximal degree in co-relation 38380. Up to 5252 conditions per place. [2024-06-20 15:26:45,386 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 423 selfloop transitions, 203 changer transitions 0/634 dead transitions. [2024-06-20 15:26:45,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 634 transitions, 9487 flow [2024-06-20 15:26:45,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:26:45,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:26:45,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-20 15:26:45,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-20 15:26:45,387 INFO L175 Difference]: Start difference. First operand has 466 places, 608 transitions, 7633 flow. Second operand 11 states and 253 transitions. [2024-06-20 15:26:45,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 634 transitions, 9487 flow [2024-06-20 15:26:49,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 634 transitions, 9061 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:49,059 INFO L231 Difference]: Finished difference. Result has 470 places, 614 transitions, 7699 flow [2024-06-20 15:26:49,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7219, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7699, PETRI_PLACES=470, PETRI_TRANSITIONS=614} [2024-06-20 15:26:49,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-20 15:26:49,060 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 614 transitions, 7699 flow [2024-06-20 15:26:49,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:49,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:49,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:49,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-20 15:26:49,061 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:49,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:49,061 INFO L85 PathProgramCache]: Analyzing trace with hash -592465204, now seen corresponding path program 15 times [2024-06-20 15:26:49,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:49,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163908396] [2024-06-20 15:26:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:49,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:49,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:49,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:49,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:49,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163908396] [2024-06-20 15:26:49,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163908396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:49,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:49,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:49,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407814762] [2024-06-20 15:26:49,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:49,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:49,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:49,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:49,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:49,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:49,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 614 transitions, 7699 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:49,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:49,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:49,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:50,505 INFO L124 PetriNetUnfolderBase]: 3641/6240 cut-off events. [2024-06-20 15:26:50,505 INFO L125 PetriNetUnfolderBase]: For 419223/419223 co-relation queries the response was YES. [2024-06-20 15:26:50,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38501 conditions, 6240 events. 3641/6240 cut-off events. For 419223/419223 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44304 event pairs, 697 based on Foata normal form. 1/6233 useless extension candidates. Maximal degree in co-relation 38298. Up to 5249 conditions per place. [2024-06-20 15:26:50,604 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 434 selfloop transitions, 189 changer transitions 0/631 dead transitions. [2024-06-20 15:26:50,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 631 transitions, 9465 flow [2024-06-20 15:26:50,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:26:50,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:26:50,605 INFO L175 Difference]: Start difference. First operand has 470 places, 614 transitions, 7699 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:26:50,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 631 transitions, 9465 flow [2024-06-20 15:26:54,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 631 transitions, 9093 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:54,520 INFO L231 Difference]: Finished difference. Result has 471 places, 614 transitions, 7711 flow [2024-06-20 15:26:54,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7711, PETRI_PLACES=471, PETRI_TRANSITIONS=614} [2024-06-20 15:26:54,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-20 15:26:54,520 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 614 transitions, 7711 flow [2024-06-20 15:26:54,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:54,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:54,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:54,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-20 15:26:54,521 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:54,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:54,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1753448338, now seen corresponding path program 16 times [2024-06-20 15:26:54,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:54,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182397187] [2024-06-20 15:26:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:54,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:54,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:54,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182397187] [2024-06-20 15:26:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182397187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114400964] [2024-06-20 15:26:54,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:54,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:54,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:54,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 614 transitions, 7711 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:54,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:54,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:54,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:26:55,952 INFO L124 PetriNetUnfolderBase]: 3638/6236 cut-off events. [2024-06-20 15:26:55,953 INFO L125 PetriNetUnfolderBase]: For 418605/418605 co-relation queries the response was YES. [2024-06-20 15:26:56,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38410 conditions, 6236 events. 3638/6236 cut-off events. For 418605/418605 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44283 event pairs, 697 based on Foata normal form. 1/6229 useless extension candidates. Maximal degree in co-relation 38206. Up to 5246 conditions per place. [2024-06-20 15:26:56,059 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 440 selfloop transitions, 182 changer transitions 0/630 dead transitions. [2024-06-20 15:26:56,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 630 transitions, 9235 flow [2024-06-20 15:26:56,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:26:56,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:26:56,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 15:26:56,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-20 15:26:56,061 INFO L175 Difference]: Start difference. First operand has 471 places, 614 transitions, 7711 flow. Second operand 8 states and 192 transitions. [2024-06-20 15:26:56,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 630 transitions, 9235 flow [2024-06-20 15:26:59,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 630 transitions, 8851 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:26:59,332 INFO L231 Difference]: Finished difference. Result has 472 places, 614 transitions, 7700 flow [2024-06-20 15:26:59,333 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7700, PETRI_PLACES=472, PETRI_TRANSITIONS=614} [2024-06-20 15:26:59,333 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-20 15:26:59,333 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 614 transitions, 7700 flow [2024-06-20 15:26:59,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:59,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:26:59,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:26:59,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-20 15:26:59,334 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:26:59,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:26:59,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1747024828, now seen corresponding path program 17 times [2024-06-20 15:26:59,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:26:59,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104846139] [2024-06-20 15:26:59,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:26:59,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:26:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:26:59,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:26:59,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:26:59,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104846139] [2024-06-20 15:26:59,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104846139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:26:59,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:26:59,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:26:59,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854424382] [2024-06-20 15:26:59,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:26:59,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:26:59,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:26:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:26:59,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:26:59,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:26:59,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 614 transitions, 7700 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:26:59,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:26:59,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:26:59,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:00,777 INFO L124 PetriNetUnfolderBase]: 3635/6232 cut-off events. [2024-06-20 15:27:00,778 INFO L125 PetriNetUnfolderBase]: For 417572/417572 co-relation queries the response was YES. [2024-06-20 15:27:00,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38310 conditions, 6232 events. 3635/6232 cut-off events. For 417572/417572 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44231 event pairs, 697 based on Foata normal form. 1/6225 useless extension candidates. Maximal degree in co-relation 38105. Up to 5243 conditions per place. [2024-06-20 15:27:00,877 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 433 selfloop transitions, 192 changer transitions 0/633 dead transitions. [2024-06-20 15:27:00,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 633 transitions, 9238 flow [2024-06-20 15:27:00,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:27:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:27:00,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 250 transitions. [2024-06-20 15:27:00,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5543237250554324 [2024-06-20 15:27:00,878 INFO L175 Difference]: Start difference. First operand has 472 places, 614 transitions, 7700 flow. Second operand 11 states and 250 transitions. [2024-06-20 15:27:00,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 633 transitions, 9238 flow [2024-06-20 15:27:04,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 633 transitions, 8927 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 15:27:04,033 INFO L231 Difference]: Finished difference. Result has 478 places, 614 transitions, 7779 flow [2024-06-20 15:27:04,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7389, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7779, PETRI_PLACES=478, PETRI_TRANSITIONS=614} [2024-06-20 15:27:04,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-20 15:27:04,034 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 614 transitions, 7779 flow [2024-06-20 15:27:04,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:04,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:04,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:04,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-20 15:27:04,034 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)] === [2024-06-20 15:27:04,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:04,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1747019248, now seen corresponding path program 18 times [2024-06-20 15:27:04,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:04,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011620761] [2024-06-20 15:27:04,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:04,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:04,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:04,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011620761] [2024-06-20 15:27:04,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011620761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:04,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:04,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:04,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293048509] [2024-06-20 15:27:04,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:04,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:04,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:04,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:04,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:04,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:04,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 614 transitions, 7779 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:04,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:04,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:04,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:05,531 INFO L124 PetriNetUnfolderBase]: 3632/6228 cut-off events. [2024-06-20 15:27:05,532 INFO L125 PetriNetUnfolderBase]: For 416678/416678 co-relation queries the response was YES. [2024-06-20 15:27:05,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38266 conditions, 6228 events. 3632/6228 cut-off events. For 416678/416678 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 44195 event pairs, 697 based on Foata normal form. 1/6221 useless extension candidates. Maximal degree in co-relation 38060. Up to 5240 conditions per place. [2024-06-20 15:27:05,626 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 438 selfloop transitions, 185 changer transitions 0/631 dead transitions. [2024-06-20 15:27:05,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 631 transitions, 9065 flow [2024-06-20 15:27:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:27:05,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:27:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:27:05,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:27:05,628 INFO L175 Difference]: Start difference. First operand has 478 places, 614 transitions, 7779 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:27:05,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 631 transitions, 9065 flow [2024-06-20 15:27:08,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 631 transitions, 8478 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-20 15:27:08,981 INFO L231 Difference]: Finished difference. Result has 476 places, 614 transitions, 7570 flow [2024-06-20 15:27:08,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7192, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7570, PETRI_PLACES=476, PETRI_TRANSITIONS=614} [2024-06-20 15:27:08,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-20 15:27:08,982 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 614 transitions, 7570 flow [2024-06-20 15:27:08,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:08,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:08,982 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, 1] [2024-06-20 15:27:08,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-20 15:27:08,982 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)] === [2024-06-20 15:27:08,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:08,983 INFO L85 PathProgramCache]: Analyzing trace with hash 790941952, now seen corresponding path program 19 times [2024-06-20 15:27:08,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:08,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212556190] [2024-06-20 15:27:08,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:08,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:09,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:09,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212556190] [2024-06-20 15:27:09,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212556190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:09,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:09,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:09,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700455057] [2024-06-20 15:27:09,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:09,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:09,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:09,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:09,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:09,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:09,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 614 transitions, 7570 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:09,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:09,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:09,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:10,417 INFO L124 PetriNetUnfolderBase]: 3645/6251 cut-off events. [2024-06-20 15:27:10,417 INFO L125 PetriNetUnfolderBase]: For 432162/432165 co-relation queries the response was YES. [2024-06-20 15:27:10,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38185 conditions, 6251 events. 3645/6251 cut-off events. For 432162/432165 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 44491 event pairs, 745 based on Foata normal form. 3/6243 useless extension candidates. Maximal degree in co-relation 37979. Up to 5022 conditions per place. [2024-06-20 15:27:10,517 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 310 changer transitions 0/638 dead transitions. [2024-06-20 15:27:10,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 638 transitions, 9438 flow [2024-06-20 15:27:10,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:10,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:10,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:27:10,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:27:10,518 INFO L175 Difference]: Start difference. First operand has 476 places, 614 transitions, 7570 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:27:10,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 638 transitions, 9438 flow [2024-06-20 15:27:13,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 638 transitions, 8995 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 15:27:13,647 INFO L231 Difference]: Finished difference. Result has 475 places, 620 transitions, 7823 flow [2024-06-20 15:27:13,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7127, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=304, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7823, PETRI_PLACES=475, PETRI_TRANSITIONS=620} [2024-06-20 15:27:13,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-20 15:27:13,647 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 620 transitions, 7823 flow [2024-06-20 15:27:13,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:13,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:13,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:13,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-20 15:27:13,648 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)] === [2024-06-20 15:27:13,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:13,648 INFO L85 PathProgramCache]: Analyzing trace with hash 792809676, now seen corresponding path program 20 times [2024-06-20 15:27:13,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:13,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790964490] [2024-06-20 15:27:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:13,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:13,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790964490] [2024-06-20 15:27:13,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790964490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:13,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:13,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:13,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243501405] [2024-06-20 15:27:13,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:13,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:13,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:13,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:13,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:13,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 620 transitions, 7823 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:13,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:13,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:13,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:15,073 INFO L124 PetriNetUnfolderBase]: 3642/6247 cut-off events. [2024-06-20 15:27:15,073 INFO L125 PetriNetUnfolderBase]: For 431162/431165 co-relation queries the response was YES. [2024-06-20 15:27:15,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38380 conditions, 6247 events. 3642/6247 cut-off events. For 431162/431165 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 44463 event pairs, 745 based on Foata normal form. 3/6239 useless extension candidates. Maximal degree in co-relation 38173. Up to 5019 conditions per place. [2024-06-20 15:27:15,178 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 311 changer transitions 0/639 dead transitions. [2024-06-20 15:27:15,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 639 transitions, 9379 flow [2024-06-20 15:27:15,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:27:15,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:27:15,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 252 transitions. [2024-06-20 15:27:15,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5587583148558758 [2024-06-20 15:27:15,180 INFO L175 Difference]: Start difference. First operand has 475 places, 620 transitions, 7823 flow. Second operand 11 states and 252 transitions. [2024-06-20 15:27:15,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 639 transitions, 9379 flow [2024-06-20 15:27:18,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 639 transitions, 8705 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:18,674 INFO L231 Difference]: Finished difference. Result has 480 places, 620 transitions, 7777 flow [2024-06-20 15:27:18,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7149, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7777, PETRI_PLACES=480, PETRI_TRANSITIONS=620} [2024-06-20 15:27:18,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 15:27:18,675 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 620 transitions, 7777 flow [2024-06-20 15:27:18,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:18,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:18,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:18,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-20 15:27:18,675 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)] === [2024-06-20 15:27:18,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:18,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1979026402, now seen corresponding path program 21 times [2024-06-20 15:27:18,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:18,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192049177] [2024-06-20 15:27:18,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:18,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:18,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:18,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192049177] [2024-06-20 15:27:18,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192049177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:18,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:18,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:18,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660266402] [2024-06-20 15:27:18,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:18,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:18,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:18,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:18,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 620 transitions, 7777 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:18,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:18,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:18,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:20,156 INFO L124 PetriNetUnfolderBase]: 3655/6268 cut-off events. [2024-06-20 15:27:20,157 INFO L125 PetriNetUnfolderBase]: For 443477/443477 co-relation queries the response was YES. [2024-06-20 15:27:20,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38619 conditions, 6268 events. 3655/6268 cut-off events. For 443477/443477 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 44589 event pairs, 697 based on Foata normal form. 1/6261 useless extension candidates. Maximal degree in co-relation 38411. Up to 5034 conditions per place. [2024-06-20 15:27:20,259 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 322 selfloop transitions, 317 changer transitions 0/647 dead transitions. [2024-06-20 15:27:20,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 647 transitions, 9683 flow [2024-06-20 15:27:20,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:20,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-20 15:27:20,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907859078590786 [2024-06-20 15:27:20,260 INFO L175 Difference]: Start difference. First operand has 480 places, 620 transitions, 7777 flow. Second operand 9 states and 218 transitions. [2024-06-20 15:27:20,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 647 transitions, 9683 flow [2024-06-20 15:27:24,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 647 transitions, 9040 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-20 15:27:24,048 INFO L231 Difference]: Finished difference. Result has 479 places, 626 transitions, 7852 flow [2024-06-20 15:27:24,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7146, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=311, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7852, PETRI_PLACES=479, PETRI_TRANSITIONS=626} [2024-06-20 15:27:24,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-20 15:27:24,048 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 626 transitions, 7852 flow [2024-06-20 15:27:24,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:24,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:24,049 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, 1] [2024-06-20 15:27:24,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-20 15:27:24,049 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)] === [2024-06-20 15:27:24,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:24,049 INFO L85 PathProgramCache]: Analyzing trace with hash 593329326, now seen corresponding path program 22 times [2024-06-20 15:27:24,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:24,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880087366] [2024-06-20 15:27:24,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:24,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:24,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880087366] [2024-06-20 15:27:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880087366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:24,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:24,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:24,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944938516] [2024-06-20 15:27:24,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:24,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:24,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:24,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:24,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 626 transitions, 7852 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:24,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:24,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:24,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:25,523 INFO L124 PetriNetUnfolderBase]: 3660/6277 cut-off events. [2024-06-20 15:27:25,523 INFO L125 PetriNetUnfolderBase]: For 450069/450069 co-relation queries the response was YES. [2024-06-20 15:27:25,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38734 conditions, 6277 events. 3660/6277 cut-off events. For 450069/450069 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 44653 event pairs, 697 based on Foata normal form. 1/6270 useless extension candidates. Maximal degree in co-relation 38525. Up to 5040 conditions per place. [2024-06-20 15:27:25,630 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 357 selfloop transitions, 286 changer transitions 0/651 dead transitions. [2024-06-20 15:27:25,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 651 transitions, 9737 flow [2024-06-20 15:27:25,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:25,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-20 15:27:25,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-20 15:27:25,631 INFO L175 Difference]: Start difference. First operand has 479 places, 626 transitions, 7852 flow. Second operand 7 states and 179 transitions. [2024-06-20 15:27:25,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 651 transitions, 9737 flow [2024-06-20 15:27:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 651 transitions, 9081 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:28,791 INFO L231 Difference]: Finished difference. Result has 479 places, 629 transitions, 7825 flow [2024-06-20 15:27:28,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7206, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7825, PETRI_PLACES=479, PETRI_TRANSITIONS=629} [2024-06-20 15:27:28,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-20 15:27:28,792 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 629 transitions, 7825 flow [2024-06-20 15:27:28,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:28,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:28,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:28,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-20 15:27:28,793 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)] === [2024-06-20 15:27:28,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2138475880, now seen corresponding path program 23 times [2024-06-20 15:27:28,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:28,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822810752] [2024-06-20 15:27:28,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:28,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:28,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:28,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822810752] [2024-06-20 15:27:28,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822810752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:28,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:28,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:28,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74291583] [2024-06-20 15:27:28,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:28,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:28,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:28,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:28,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:28,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:28,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 629 transitions, 7825 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:28,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:28,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:28,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:30,304 INFO L124 PetriNetUnfolderBase]: 3665/6286 cut-off events. [2024-06-20 15:27:30,305 INFO L125 PetriNetUnfolderBase]: For 450112/450112 co-relation queries the response was YES. [2024-06-20 15:27:30,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38729 conditions, 6286 events. 3665/6286 cut-off events. For 450112/450112 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44729 event pairs, 697 based on Foata normal form. 1/6279 useless extension candidates. Maximal degree in co-relation 38520. Up to 5046 conditions per place. [2024-06-20 15:27:30,408 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 327 changer transitions 0/654 dead transitions. [2024-06-20 15:27:30,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 654 transitions, 9714 flow [2024-06-20 15:27:30,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:27:30,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:27:30,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 235 transitions. [2024-06-20 15:27:30,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-20 15:27:30,409 INFO L175 Difference]: Start difference. First operand has 479 places, 629 transitions, 7825 flow. Second operand 10 states and 235 transitions. [2024-06-20 15:27:30,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 654 transitions, 9714 flow [2024-06-20 15:27:33,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 654 transitions, 9109 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 15:27:33,913 INFO L231 Difference]: Finished difference. Result has 483 places, 632 transitions, 7925 flow [2024-06-20 15:27:33,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7230, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=324, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7925, PETRI_PLACES=483, PETRI_TRANSITIONS=632} [2024-06-20 15:27:33,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-20 15:27:33,914 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 632 transitions, 7925 flow [2024-06-20 15:27:33,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:33,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:33,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:33,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-20 15:27:33,915 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)] === [2024-06-20 15:27:33,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:33,915 INFO L85 PathProgramCache]: Analyzing trace with hash 2138308480, now seen corresponding path program 24 times [2024-06-20 15:27:33,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:33,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415993569] [2024-06-20 15:27:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:33,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:34,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:34,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:34,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415993569] [2024-06-20 15:27:34,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415993569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:34,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:34,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:34,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560554645] [2024-06-20 15:27:34,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:34,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:34,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:34,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:34,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:34,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 632 transitions, 7925 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:34,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:34,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:34,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:35,403 INFO L124 PetriNetUnfolderBase]: 3662/6282 cut-off events. [2024-06-20 15:27:35,403 INFO L125 PetriNetUnfolderBase]: For 441952/441952 co-relation queries the response was YES. [2024-06-20 15:27:35,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38637 conditions, 6282 events. 3662/6282 cut-off events. For 441952/441952 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44730 event pairs, 697 based on Foata normal form. 1/6275 useless extension candidates. Maximal degree in co-relation 38428. Up to 5043 conditions per place. [2024-06-20 15:27:35,511 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 344 selfloop transitions, 299 changer transitions 0/651 dead transitions. [2024-06-20 15:27:35,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 651 transitions, 9765 flow [2024-06-20 15:27:35,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:27:35,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:27:35,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:27:35,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:27:35,512 INFO L175 Difference]: Start difference. First operand has 483 places, 632 transitions, 7925 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:27:35,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 651 transitions, 9765 flow [2024-06-20 15:27:38,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 651 transitions, 9125 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:38,567 INFO L231 Difference]: Finished difference. Result has 482 places, 632 transitions, 7897 flow [2024-06-20 15:27:38,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7289, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=299, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7897, PETRI_PLACES=482, PETRI_TRANSITIONS=632} [2024-06-20 15:27:38,568 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-20 15:27:38,568 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 632 transitions, 7897 flow [2024-06-20 15:27:38,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:38,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:38,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:38,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-20 15:27:38,569 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)] === [2024-06-20 15:27:38,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:38,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2138124340, now seen corresponding path program 25 times [2024-06-20 15:27:38,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:38,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624158008] [2024-06-20 15:27:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:38,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:38,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:38,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:38,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624158008] [2024-06-20 15:27:38,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624158008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:38,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:38,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:38,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974461192] [2024-06-20 15:27:38,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:38,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:38,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:38,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:38,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:38,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:38,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 632 transitions, 7897 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:38,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:38,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:38,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:40,050 INFO L124 PetriNetUnfolderBase]: 3659/6278 cut-off events. [2024-06-20 15:27:40,050 INFO L125 PetriNetUnfolderBase]: For 434014/434014 co-relation queries the response was YES. [2024-06-20 15:27:40,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38457 conditions, 6278 events. 3659/6278 cut-off events. For 434014/434014 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44719 event pairs, 697 based on Foata normal form. 1/6271 useless extension candidates. Maximal degree in co-relation 38248. Up to 5040 conditions per place. [2024-06-20 15:27:40,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 353 selfloop transitions, 300 changer transitions 0/661 dead transitions. [2024-06-20 15:27:40,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 661 transitions, 9529 flow [2024-06-20 15:27:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:40,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 15:27:40,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-20 15:27:40,168 INFO L175 Difference]: Start difference. First operand has 482 places, 632 transitions, 7897 flow. Second operand 9 states and 226 transitions. [2024-06-20 15:27:40,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 661 transitions, 9529 flow [2024-06-20 15:27:43,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 661 transitions, 8901 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:27:43,684 INFO L231 Difference]: Finished difference. Result has 484 places, 632 transitions, 7890 flow [2024-06-20 15:27:43,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7271, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=300, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7890, PETRI_PLACES=484, PETRI_TRANSITIONS=632} [2024-06-20 15:27:43,685 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-20 15:27:43,685 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 632 transitions, 7890 flow [2024-06-20 15:27:43,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:43,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:43,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:43,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-20 15:27:43,686 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)] === [2024-06-20 15:27:43,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:43,686 INFO L85 PathProgramCache]: Analyzing trace with hash 2138129920, now seen corresponding path program 26 times [2024-06-20 15:27:43,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:43,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833923560] [2024-06-20 15:27:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:43,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:43,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:43,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:43,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833923560] [2024-06-20 15:27:43,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833923560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:43,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:43,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:43,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857860568] [2024-06-20 15:27:43,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:43,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:43,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:43,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:43,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:43,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:43,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 632 transitions, 7890 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:43,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:43,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:43,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:45,292 INFO L124 PetriNetUnfolderBase]: 3656/6274 cut-off events. [2024-06-20 15:27:45,293 INFO L125 PetriNetUnfolderBase]: For 425752/425752 co-relation queries the response was YES. [2024-06-20 15:27:45,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38339 conditions, 6274 events. 3656/6274 cut-off events. For 425752/425752 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 44627 event pairs, 697 based on Foata normal form. 1/6267 useless extension candidates. Maximal degree in co-relation 38130. Up to 5037 conditions per place. [2024-06-20 15:27:45,387 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 334 selfloop transitions, 316 changer transitions 0/658 dead transitions. [2024-06-20 15:27:45,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 658 transitions, 9254 flow [2024-06-20 15:27:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:27:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:27:45,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-20 15:27:45,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-20 15:27:45,389 INFO L175 Difference]: Start difference. First operand has 484 places, 632 transitions, 7890 flow. Second operand 10 states and 239 transitions. [2024-06-20 15:27:45,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 658 transitions, 9254 flow [2024-06-20 15:27:48,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 658 transitions, 8586 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-20 15:27:48,250 INFO L231 Difference]: Finished difference. Result has 484 places, 632 transitions, 7868 flow [2024-06-20 15:27:48,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7222, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7868, PETRI_PLACES=484, PETRI_TRANSITIONS=632} [2024-06-20 15:27:48,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-20 15:27:48,251 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 632 transitions, 7868 flow [2024-06-20 15:27:48,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:48,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:48,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:48,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-20 15:27:48,252 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)] === [2024-06-20 15:27:48,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:48,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1788585374, now seen corresponding path program 1 times [2024-06-20 15:27:48,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:48,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001627659] [2024-06-20 15:27:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:48,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:48,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:48,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001627659] [2024-06-20 15:27:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001627659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:48,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:48,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:48,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679752567] [2024-06-20 15:27:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:48,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:48,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:48,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:48,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 632 transitions, 7868 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:48,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:49,754 INFO L124 PetriNetUnfolderBase]: 3676/6323 cut-off events. [2024-06-20 15:27:49,754 INFO L125 PetriNetUnfolderBase]: For 458844/458844 co-relation queries the response was YES. [2024-06-20 15:27:49,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38575 conditions, 6323 events. 3676/6323 cut-off events. For 458844/458844 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 45069 event pairs, 693 based on Foata normal form. 6/6324 useless extension candidates. Maximal degree in co-relation 38367. Up to 5433 conditions per place. [2024-06-20 15:27:49,865 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 570 selfloop transitions, 79 changer transitions 0/657 dead transitions. [2024-06-20 15:27:49,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 657 transitions, 9294 flow [2024-06-20 15:27:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:27:49,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:27:49,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 231 transitions. [2024-06-20 15:27:49,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634146341463414 [2024-06-20 15:27:49,866 INFO L175 Difference]: Start difference. First operand has 484 places, 632 transitions, 7868 flow. Second operand 10 states and 231 transitions. [2024-06-20 15:27:49,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 657 transitions, 9294 flow [2024-06-20 15:27:52,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 657 transitions, 8468 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-20 15:27:52,836 INFO L231 Difference]: Finished difference. Result has 481 places, 633 transitions, 7240 flow [2024-06-20 15:27:52,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7042, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7240, PETRI_PLACES=481, PETRI_TRANSITIONS=633} [2024-06-20 15:27:52,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-20 15:27:52,837 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 633 transitions, 7240 flow [2024-06-20 15:27:52,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:52,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:52,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:52,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-20 15:27:52,838 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)] === [2024-06-20 15:27:52,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:52,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1623654832, now seen corresponding path program 2 times [2024-06-20 15:27:52,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:52,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237406468] [2024-06-20 15:27:52,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:52,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:52,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:52,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237406468] [2024-06-20 15:27:52,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237406468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:52,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:52,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:52,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234723440] [2024-06-20 15:27:52,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:52,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:52,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:52,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:52,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:52,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:52,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 633 transitions, 7240 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:52,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:52,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:52,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:54,312 INFO L124 PetriNetUnfolderBase]: 3729/6410 cut-off events. [2024-06-20 15:27:54,312 INFO L125 PetriNetUnfolderBase]: For 500197/500197 co-relation queries the response was YES. [2024-06-20 15:27:54,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39330 conditions, 6410 events. 3729/6410 cut-off events. For 500197/500197 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45788 event pairs, 685 based on Foata normal form. 6/6411 useless extension candidates. Maximal degree in co-relation 39123. Up to 5089 conditions per place. [2024-06-20 15:27:54,422 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 571 selfloop transitions, 83 changer transitions 0/662 dead transitions. [2024-06-20 15:27:54,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 662 transitions, 8984 flow [2024-06-20 15:27:54,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-20 15:27:54,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-20 15:27:54,423 INFO L175 Difference]: Start difference. First operand has 481 places, 633 transitions, 7240 flow. Second operand 9 states and 214 transitions. [2024-06-20 15:27:54,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 662 transitions, 8984 flow [2024-06-20 15:27:57,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 662 transitions, 8800 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:27:57,716 INFO L231 Difference]: Finished difference. Result has 482 places, 635 transitions, 7300 flow [2024-06-20 15:27:57,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7056, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7300, PETRI_PLACES=482, PETRI_TRANSITIONS=635} [2024-06-20 15:27:57,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-20 15:27:57,717 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 635 transitions, 7300 flow [2024-06-20 15:27:57,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:57,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:27:57,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:27:57,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-20 15:27:57,717 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)] === [2024-06-20 15:27:57,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:27:57,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2034031202, now seen corresponding path program 3 times [2024-06-20 15:27:57,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:27:57,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937229363] [2024-06-20 15:27:57,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:27:57,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:27:57,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:27:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:27:57,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:27:57,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937229363] [2024-06-20 15:27:57,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937229363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:27:57,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:27:57,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:27:57,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003889137] [2024-06-20 15:27:57,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:27:57,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:27:57,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:27:57,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:27:57,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:27:57,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:27:57,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 635 transitions, 7300 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:27:57,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:27:57,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:27:57,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:27:59,253 INFO L124 PetriNetUnfolderBase]: 3716/6393 cut-off events. [2024-06-20 15:27:59,254 INFO L125 PetriNetUnfolderBase]: For 461663/461663 co-relation queries the response was YES. [2024-06-20 15:27:59,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38459 conditions, 6393 events. 3716/6393 cut-off events. For 461663/461663 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 45642 event pairs, 671 based on Foata normal form. 6/6394 useless extension candidates. Maximal degree in co-relation 38251. Up to 5083 conditions per place. [2024-06-20 15:27:59,361 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 567 selfloop transitions, 87 changer transitions 0/662 dead transitions. [2024-06-20 15:27:59,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 662 transitions, 8734 flow [2024-06-20 15:27:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:27:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:27:59,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-20 15:27:59,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5826558265582655 [2024-06-20 15:27:59,362 INFO L175 Difference]: Start difference. First operand has 482 places, 635 transitions, 7300 flow. Second operand 9 states and 215 transitions. [2024-06-20 15:27:59,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 662 transitions, 8734 flow [2024-06-20 15:28:02,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 662 transitions, 8575 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:02,620 INFO L231 Difference]: Finished difference. Result has 486 places, 635 transitions, 7319 flow [2024-06-20 15:28:02,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7319, PETRI_PLACES=486, PETRI_TRANSITIONS=635} [2024-06-20 15:28:02,621 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-20 15:28:02,621 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 635 transitions, 7319 flow [2024-06-20 15:28:02,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:02,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:02,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:02,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-20 15:28:02,621 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)] === [2024-06-20 15:28:02,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:02,622 INFO L85 PathProgramCache]: Analyzing trace with hash -687471556, now seen corresponding path program 4 times [2024-06-20 15:28:02,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:02,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753756638] [2024-06-20 15:28:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:02,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:02,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753756638] [2024-06-20 15:28:02,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753756638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:02,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:02,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916274902] [2024-06-20 15:28:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:02,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:02,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:02,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:02,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:02,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 635 transitions, 7319 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:02,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:02,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:02,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:04,171 INFO L124 PetriNetUnfolderBase]: 3736/6421 cut-off events. [2024-06-20 15:28:04,172 INFO L125 PetriNetUnfolderBase]: For 467195/467195 co-relation queries the response was YES. [2024-06-20 15:28:04,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38864 conditions, 6421 events. 3736/6421 cut-off events. For 467195/467195 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 45839 event pairs, 691 based on Foata normal form. 6/6422 useless extension candidates. Maximal degree in co-relation 38654. Up to 5293 conditions per place. [2024-06-20 15:28:04,277 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 528 selfloop transitions, 135 changer transitions 0/671 dead transitions. [2024-06-20 15:28:04,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 671 transitions, 8807 flow [2024-06-20 15:28:04,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:04,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:04,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 15:28:04,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-20 15:28:04,278 INFO L175 Difference]: Start difference. First operand has 486 places, 635 transitions, 7319 flow. Second operand 9 states and 226 transitions. [2024-06-20 15:28:04,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 671 transitions, 8807 flow [2024-06-20 15:28:07,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 671 transitions, 8622 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:07,634 INFO L231 Difference]: Finished difference. Result has 487 places, 636 transitions, 7450 flow [2024-06-20 15:28:07,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7134, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7450, PETRI_PLACES=487, PETRI_TRANSITIONS=636} [2024-06-20 15:28:07,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 15:28:07,634 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 636 transitions, 7450 flow [2024-06-20 15:28:07,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:07,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:07,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-20 15:28:07,635 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)] === [2024-06-20 15:28:07,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:07,635 INFO L85 PathProgramCache]: Analyzing trace with hash 873389268, now seen corresponding path program 5 times [2024-06-20 15:28:07,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:07,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702279516] [2024-06-20 15:28:07,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:07,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:07,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:07,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:07,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702279516] [2024-06-20 15:28:07,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702279516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043663209] [2024-06-20 15:28:07,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:07,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:07,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:07,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 636 transitions, 7450 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:07,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:07,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:07,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:09,239 INFO L124 PetriNetUnfolderBase]: 3822/6591 cut-off events. [2024-06-20 15:28:09,239 INFO L125 PetriNetUnfolderBase]: For 578201/578201 co-relation queries the response was YES. [2024-06-20 15:28:09,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41852 conditions, 6591 events. 3822/6591 cut-off events. For 578201/578201 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 47315 event pairs, 575 based on Foata normal form. 6/6592 useless extension candidates. Maximal degree in co-relation 41641. Up to 4302 conditions per place. [2024-06-20 15:28:09,348 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 511 selfloop transitions, 157 changer transitions 0/676 dead transitions. [2024-06-20 15:28:09,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 676 transitions, 9570 flow [2024-06-20 15:28:09,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-20 15:28:09,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:28:09,349 INFO L175 Difference]: Start difference. First operand has 487 places, 636 transitions, 7450 flow. Second operand 8 states and 208 transitions. [2024-06-20 15:28:09,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 676 transitions, 9570 flow [2024-06-20 15:28:13,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 676 transitions, 9262 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:13,798 INFO L231 Difference]: Finished difference. Result has 488 places, 639 transitions, 7588 flow [2024-06-20 15:28:13,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7152, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7588, PETRI_PLACES=488, PETRI_TRANSITIONS=639} [2024-06-20 15:28:13,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-20 15:28:13,798 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 639 transitions, 7588 flow [2024-06-20 15:28:13,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:13,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:13,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:13,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-20 15:28:13,799 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)] === [2024-06-20 15:28:13,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:13,799 INFO L85 PathProgramCache]: Analyzing trace with hash -2016720990, now seen corresponding path program 6 times [2024-06-20 15:28:13,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:13,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674352486] [2024-06-20 15:28:13,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:13,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:13,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:13,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674352486] [2024-06-20 15:28:13,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674352486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:13,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:13,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:13,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120011266] [2024-06-20 15:28:13,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:13,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:13,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:13,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:13,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:13,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:13,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 639 transitions, 7588 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:13,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:13,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:13,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:15,450 INFO L124 PetriNetUnfolderBase]: 3809/6560 cut-off events. [2024-06-20 15:28:15,450 INFO L125 PetriNetUnfolderBase]: For 529928/529931 co-relation queries the response was YES. [2024-06-20 15:28:15,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41167 conditions, 6560 events. 3809/6560 cut-off events. For 529928/529931 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 47180 event pairs, 735 based on Foata normal form. 8/6558 useless extension candidates. Maximal degree in co-relation 40955. Up to 5564 conditions per place. [2024-06-20 15:28:15,561 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 539 selfloop transitions, 134 changer transitions 0/681 dead transitions. [2024-06-20 15:28:15,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 681 transitions, 9076 flow [2024-06-20 15:28:15,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:28:15,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:28:15,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-20 15:28:15,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-20 15:28:15,562 INFO L175 Difference]: Start difference. First operand has 488 places, 639 transitions, 7588 flow. Second operand 10 states and 254 transitions. [2024-06-20 15:28:15,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 681 transitions, 9076 flow [2024-06-20 15:28:19,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 681 transitions, 8917 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 15:28:19,589 INFO L231 Difference]: Finished difference. Result has 493 places, 639 transitions, 7701 flow [2024-06-20 15:28:19,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7701, PETRI_PLACES=493, PETRI_TRANSITIONS=639} [2024-06-20 15:28:19,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 15:28:19,590 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 639 transitions, 7701 flow [2024-06-20 15:28:19,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:19,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:19,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:19,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-20 15:28:19,590 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)] === [2024-06-20 15:28:19,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:19,591 INFO L85 PathProgramCache]: Analyzing trace with hash -952803072, now seen corresponding path program 7 times [2024-06-20 15:28:19,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:19,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85225298] [2024-06-20 15:28:19,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:19,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:19,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:19,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:19,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85225298] [2024-06-20 15:28:19,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85225298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:19,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:19,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:19,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734038621] [2024-06-20 15:28:19,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:19,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:19,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:19,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:19,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:19,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:19,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 639 transitions, 7701 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:19,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:19,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:19,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:21,172 INFO L124 PetriNetUnfolderBase]: 3829/6584 cut-off events. [2024-06-20 15:28:21,172 INFO L125 PetriNetUnfolderBase]: For 529250/529253 co-relation queries the response was YES. [2024-06-20 15:28:21,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41577 conditions, 6584 events. 3829/6584 cut-off events. For 529250/529253 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47270 event pairs, 723 based on Foata normal form. 8/6582 useless extension candidates. Maximal degree in co-relation 41365. Up to 5304 conditions per place. [2024-06-20 15:28:21,279 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 515 selfloop transitions, 153 changer transitions 0/676 dead transitions. [2024-06-20 15:28:21,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 676 transitions, 9201 flow [2024-06-20 15:28:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:28:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:28:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-20 15:28:21,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124661246612466 [2024-06-20 15:28:21,280 INFO L175 Difference]: Start difference. First operand has 493 places, 639 transitions, 7701 flow. Second operand 9 states and 226 transitions. [2024-06-20 15:28:21,280 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 676 transitions, 9201 flow [2024-06-20 15:28:25,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 676 transitions, 8820 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-20 15:28:25,638 INFO L231 Difference]: Finished difference. Result has 493 places, 640 transitions, 7670 flow [2024-06-20 15:28:25,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7320, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7670, PETRI_PLACES=493, PETRI_TRANSITIONS=640} [2024-06-20 15:28:25,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 15:28:25,639 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 640 transitions, 7670 flow [2024-06-20 15:28:25,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:25,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:25,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:25,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-20 15:28:25,640 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)] === [2024-06-20 15:28:25,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:25,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1164951632, now seen corresponding path program 8 times [2024-06-20 15:28:25,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:25,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127526417] [2024-06-20 15:28:25,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:25,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:25,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:25,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:25,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:25,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127526417] [2024-06-20 15:28:25,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127526417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:25,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:25,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:25,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596219851] [2024-06-20 15:28:25,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:25,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:25,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:25,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:25,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:25,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:25,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 640 transitions, 7670 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:25,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:25,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:25,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:27,191 INFO L124 PetriNetUnfolderBase]: 3816/6580 cut-off events. [2024-06-20 15:28:27,191 INFO L125 PetriNetUnfolderBase]: For 484179/484179 co-relation queries the response was YES. [2024-06-20 15:28:27,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40630 conditions, 6580 events. 3816/6580 cut-off events. For 484179/484179 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 47233 event pairs, 565 based on Foata normal form. 6/6581 useless extension candidates. Maximal degree in co-relation 40417. Up to 4322 conditions per place. [2024-06-20 15:28:27,299 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 515 selfloop transitions, 148 changer transitions 0/671 dead transitions. [2024-06-20 15:28:27,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 671 transitions, 9122 flow [2024-06-20 15:28:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:27,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:28:27,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:28:27,300 INFO L175 Difference]: Start difference. First operand has 493 places, 640 transitions, 7670 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:28:27,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 671 transitions, 9122 flow [2024-06-20 15:28:31,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 671 transitions, 8768 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:31,544 INFO L231 Difference]: Finished difference. Result has 494 places, 640 transitions, 7619 flow [2024-06-20 15:28:31,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7316, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=492, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7619, PETRI_PLACES=494, PETRI_TRANSITIONS=640} [2024-06-20 15:28:31,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 15:28:31,545 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 640 transitions, 7619 flow [2024-06-20 15:28:31,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:31,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:31,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:31,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-20 15:28:31,546 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)] === [2024-06-20 15:28:31,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:31,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1206452130, now seen corresponding path program 9 times [2024-06-20 15:28:31,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:31,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416664590] [2024-06-20 15:28:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:31,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:31,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:31,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:31,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416664590] [2024-06-20 15:28:31,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416664590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:31,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:31,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:31,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541369761] [2024-06-20 15:28:31,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:31,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:31,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:31,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:31,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:31,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:31,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 640 transitions, 7619 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:31,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:31,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:31,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:33,292 INFO L124 PetriNetUnfolderBase]: 3836/6624 cut-off events. [2024-06-20 15:28:33,292 INFO L125 PetriNetUnfolderBase]: For 492979/492982 co-relation queries the response was YES. [2024-06-20 15:28:33,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40969 conditions, 6624 events. 3836/6624 cut-off events. For 492979/492982 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 47737 event pairs, 574 based on Foata normal form. 8/6625 useless extension candidates. Maximal degree in co-relation 40755. Up to 4143 conditions per place. [2024-06-20 15:28:33,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 502 selfloop transitions, 165 changer transitions 0/675 dead transitions. [2024-06-20 15:28:33,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 675 transitions, 9397 flow [2024-06-20 15:28:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:33,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:33,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 15:28:33,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2024-06-20 15:28:33,390 INFO L175 Difference]: Start difference. First operand has 494 places, 640 transitions, 7619 flow. Second operand 8 states and 204 transitions. [2024-06-20 15:28:33,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 675 transitions, 9397 flow [2024-06-20 15:28:37,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 675 transitions, 9062 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:37,436 INFO L231 Difference]: Finished difference. Result has 494 places, 641 transitions, 7660 flow [2024-06-20 15:28:37,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7286, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7660, PETRI_PLACES=494, PETRI_TRANSITIONS=641} [2024-06-20 15:28:37,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-20 15:28:37,437 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 641 transitions, 7660 flow [2024-06-20 15:28:37,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:37,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:37,437 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, 1] [2024-06-20 15:28:37,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-20 15:28:37,438 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)] === [2024-06-20 15:28:37,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:37,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1413105570, now seen corresponding path program 10 times [2024-06-20 15:28:37,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:37,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900357809] [2024-06-20 15:28:37,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:37,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:37,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:37,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:37,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:37,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900357809] [2024-06-20 15:28:37,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900357809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:37,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:37,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:37,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092509430] [2024-06-20 15:28:37,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:37,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:37,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:37,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:37,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:37,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 641 transitions, 7660 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:37,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:37,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:37,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:39,051 INFO L124 PetriNetUnfolderBase]: 3856/6651 cut-off events. [2024-06-20 15:28:39,051 INFO L125 PetriNetUnfolderBase]: For 495439/495442 co-relation queries the response was YES. [2024-06-20 15:28:39,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41288 conditions, 6651 events. 3856/6651 cut-off events. For 495439/495442 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47885 event pairs, 635 based on Foata normal form. 8/6652 useless extension candidates. Maximal degree in co-relation 41074. Up to 4155 conditions per place. [2024-06-20 15:28:39,160 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 517 selfloop transitions, 149 changer transitions 0/674 dead transitions. [2024-06-20 15:28:39,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 501 places, 674 transitions, 9434 flow [2024-06-20 15:28:39,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:39,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:39,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:28:39,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:28:39,161 INFO L175 Difference]: Start difference. First operand has 494 places, 641 transitions, 7660 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:28:39,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 501 places, 674 transitions, 9434 flow [2024-06-20 15:28:42,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 674 transitions, 9015 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-20 15:28:43,003 INFO L231 Difference]: Finished difference. Result has 496 places, 642 transitions, 7585 flow [2024-06-20 15:28:43,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7244, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=641, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7585, PETRI_PLACES=496, PETRI_TRANSITIONS=642} [2024-06-20 15:28:43,003 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-20 15:28:43,004 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 642 transitions, 7585 flow [2024-06-20 15:28:43,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:43,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:43,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:43,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-20 15:28:43,004 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)] === [2024-06-20 15:28:43,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1413372480, now seen corresponding path program 11 times [2024-06-20 15:28:43,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:43,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457424800] [2024-06-20 15:28:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:43,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:43,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:43,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457424800] [2024-06-20 15:28:43,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457424800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:43,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:43,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:28:43,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172792228] [2024-06-20 15:28:43,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:43,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:28:43,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:43,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:28:43,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:28:43,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:43,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 642 transitions, 7585 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:43,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:43,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:43,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:44,575 INFO L124 PetriNetUnfolderBase]: 3843/6632 cut-off events. [2024-06-20 15:28:44,575 INFO L125 PetriNetUnfolderBase]: For 448928/448931 co-relation queries the response was YES. [2024-06-20 15:28:44,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39713 conditions, 6632 events. 3843/6632 cut-off events. For 448928/448931 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47800 event pairs, 635 based on Foata normal form. 8/6633 useless extension candidates. Maximal degree in co-relation 39499. Up to 4149 conditions per place. [2024-06-20 15:28:44,693 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 512 selfloop transitions, 151 changer transitions 0/671 dead transitions. [2024-06-20 15:28:44,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 671 transitions, 9031 flow [2024-06-20 15:28:44,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:28:44,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:28:44,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-20 15:28:44,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-20 15:28:44,694 INFO L175 Difference]: Start difference. First operand has 496 places, 642 transitions, 7585 flow. Second operand 8 states and 197 transitions. [2024-06-20 15:28:44,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 671 transitions, 9031 flow [2024-06-20 15:28:47,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 671 transitions, 8481 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 15:28:48,004 INFO L231 Difference]: Finished difference. Result has 496 places, 642 transitions, 7341 flow [2024-06-20 15:28:48,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7035, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7341, PETRI_PLACES=496, PETRI_TRANSITIONS=642} [2024-06-20 15:28:48,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-20 15:28:48,005 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 642 transitions, 7341 flow [2024-06-20 15:28:48,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:48,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:48,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:48,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-20 15:28:48,006 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)] === [2024-06-20 15:28:48,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:48,006 INFO L85 PathProgramCache]: Analyzing trace with hash 884222462, now seen corresponding path program 1 times [2024-06-20 15:28:48,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:48,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540863135] [2024-06-20 15:28:48,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:48,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:48,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:48,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540863135] [2024-06-20 15:28:48,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540863135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:48,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:48,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:28:48,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423277300] [2024-06-20 15:28:48,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:48,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:28:48,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:48,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:28:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:28:48,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:48,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 642 transitions, 7341 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:48,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:48,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:48,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:28:49,968 INFO L124 PetriNetUnfolderBase]: 4183/7201 cut-off events. [2024-06-20 15:28:49,968 INFO L125 PetriNetUnfolderBase]: For 1014289/1014289 co-relation queries the response was YES. [2024-06-20 15:28:50,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49509 conditions, 7201 events. 4183/7201 cut-off events. For 1014289/1014289 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 52032 event pairs, 770 based on Foata normal form. 6/7201 useless extension candidates. Maximal degree in co-relation 49296. Up to 5339 conditions per place. [2024-06-20 15:28:50,083 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 623 selfloop transitions, 73 changer transitions 0/704 dead transitions. [2024-06-20 15:28:50,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 704 transitions, 9615 flow [2024-06-20 15:28:50,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:28:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:28:50,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 265 transitions. [2024-06-20 15:28:50,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2024-06-20 15:28:50,084 INFO L175 Difference]: Start difference. First operand has 496 places, 642 transitions, 7341 flow. Second operand 10 states and 265 transitions. [2024-06-20 15:28:50,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 704 transitions, 9615 flow [2024-06-20 15:28:58,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 704 transitions, 9278 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:28:58,310 INFO L231 Difference]: Finished difference. Result has 499 places, 645 transitions, 7278 flow [2024-06-20 15:28:58,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7024, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7278, PETRI_PLACES=499, PETRI_TRANSITIONS=645} [2024-06-20 15:28:58,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-20 15:28:58,311 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 645 transitions, 7278 flow [2024-06-20 15:28:58,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:58,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:28:58,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:28:58,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-20 15:28:58,311 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)] === [2024-06-20 15:28:58,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:28:58,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1581308844, now seen corresponding path program 2 times [2024-06-20 15:28:58,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:28:58,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672052892] [2024-06-20 15:28:58,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:28:58,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:28:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:28:58,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:28:58,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:28:58,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672052892] [2024-06-20 15:28:58,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672052892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:28:58,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:28:58,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:28:58,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803612805] [2024-06-20 15:28:58,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:28:58,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:28:58,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:28:58,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:28:58,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:28:58,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:28:58,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 645 transitions, 7278 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:28:58,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:28:58,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:28:58,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:00,227 INFO L124 PetriNetUnfolderBase]: 4211/7251 cut-off events. [2024-06-20 15:29:00,227 INFO L125 PetriNetUnfolderBase]: For 950177/950177 co-relation queries the response was YES. [2024-06-20 15:29:00,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48916 conditions, 7251 events. 4211/7251 cut-off events. For 950177/950177 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 52421 event pairs, 794 based on Foata normal form. 6/7253 useless extension candidates. Maximal degree in co-relation 48702. Up to 6208 conditions per place. [2024-06-20 15:29:00,556 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 625 selfloop transitions, 62 changer transitions 0/695 dead transitions. [2024-06-20 15:29:00,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 695 transitions, 8890 flow [2024-06-20 15:29:00,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:29:00,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:29:00,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 252 transitions. [2024-06-20 15:29:00,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-20 15:29:00,557 INFO L175 Difference]: Start difference. First operand has 499 places, 645 transitions, 7278 flow. Second operand 10 states and 252 transitions. [2024-06-20 15:29:00,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 695 transitions, 8890 flow [2024-06-20 15:29:07,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 695 transitions, 8751 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-20 15:29:07,403 INFO L231 Difference]: Finished difference. Result has 504 places, 648 transitions, 7333 flow [2024-06-20 15:29:07,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7151, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=645, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7333, PETRI_PLACES=504, PETRI_TRANSITIONS=648} [2024-06-20 15:29:07,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-20 15:29:07,403 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 648 transitions, 7333 flow [2024-06-20 15:29:07,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:07,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:07,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:07,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-20 15:29:07,404 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)] === [2024-06-20 15:29:07,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:07,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1340247048, now seen corresponding path program 1 times [2024-06-20 15:29:07,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:07,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771440968] [2024-06-20 15:29:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:07,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:07,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:07,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:07,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771440968] [2024-06-20 15:29:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771440968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:07,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:07,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:07,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285209695] [2024-06-20 15:29:07,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:07,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:07,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:07,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:07,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:07,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 648 transitions, 7333 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:07,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:07,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:07,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:09,263 INFO L124 PetriNetUnfolderBase]: 4343/7461 cut-off events. [2024-06-20 15:29:09,263 INFO L125 PetriNetUnfolderBase]: For 1101057/1101057 co-relation queries the response was YES. [2024-06-20 15:29:09,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52378 conditions, 7461 events. 4343/7461 cut-off events. For 1101057/1101057 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 54151 event pairs, 670 based on Foata normal form. 6/7459 useless extension candidates. Maximal degree in co-relation 52162. Up to 5939 conditions per place. [2024-06-20 15:29:09,395 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 561 selfloop transitions, 118 changer transitions 0/687 dead transitions. [2024-06-20 15:29:09,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 687 transitions, 9446 flow [2024-06-20 15:29:09,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:09,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:09,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-20 15:29:09,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-20 15:29:09,397 INFO L175 Difference]: Start difference. First operand has 504 places, 648 transitions, 7333 flow. Second operand 8 states and 206 transitions. [2024-06-20 15:29:09,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 687 transitions, 9446 flow [2024-06-20 15:29:17,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 687 transitions, 9294 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:29:17,164 INFO L231 Difference]: Finished difference. Result has 506 places, 652 transitions, 7582 flow [2024-06-20 15:29:17,165 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7582, PETRI_PLACES=506, PETRI_TRANSITIONS=652} [2024-06-20 15:29:17,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-20 15:29:17,165 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 652 transitions, 7582 flow [2024-06-20 15:29:17,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:17,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:17,166 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:17,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-20 15:29:17,166 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)] === [2024-06-20 15:29:17,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:17,166 INFO L85 PathProgramCache]: Analyzing trace with hash 1906834664, now seen corresponding path program 3 times [2024-06-20 15:29:17,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:17,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16927358] [2024-06-20 15:29:17,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:17,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:17,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:17,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:17,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16927358] [2024-06-20 15:29:17,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16927358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:17,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:17,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:29:17,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687713781] [2024-06-20 15:29:17,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:17,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:29:17,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:17,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:29:17,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:29:17,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:17,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 652 transitions, 7582 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:17,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:17,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:17,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:19,209 INFO L124 PetriNetUnfolderBase]: 4412/7586 cut-off events. [2024-06-20 15:29:19,209 INFO L125 PetriNetUnfolderBase]: For 1172612/1172612 co-relation queries the response was YES. [2024-06-20 15:29:19,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54525 conditions, 7586 events. 4412/7586 cut-off events. For 1172612/1172612 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 55208 event pairs, 844 based on Foata normal form. 6/7588 useless extension candidates. Maximal degree in co-relation 54307. Up to 6450 conditions per place. [2024-06-20 15:29:19,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 628 selfloop transitions, 68 changer transitions 0/704 dead transitions. [2024-06-20 15:29:19,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 704 transitions, 9507 flow [2024-06-20 15:29:19,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:29:19,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:29:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 267 transitions. [2024-06-20 15:29:19,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5920177383592018 [2024-06-20 15:29:19,340 INFO L175 Difference]: Start difference. First operand has 506 places, 652 transitions, 7582 flow. Second operand 11 states and 267 transitions. [2024-06-20 15:29:19,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 704 transitions, 9507 flow [2024-06-20 15:29:28,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 704 transitions, 9395 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-20 15:29:28,792 INFO L231 Difference]: Finished difference. Result has 515 places, 658 transitions, 7731 flow [2024-06-20 15:29:28,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7470, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7731, PETRI_PLACES=515, PETRI_TRANSITIONS=658} [2024-06-20 15:29:28,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 473 predicate places. [2024-06-20 15:29:28,793 INFO L495 AbstractCegarLoop]: Abstraction has has 515 places, 658 transitions, 7731 flow [2024-06-20 15:29:28,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:28,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:28,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:28,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-20 15:29:28,793 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)] === [2024-06-20 15:29:28,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:28,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1758440550, now seen corresponding path program 2 times [2024-06-20 15:29:28,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:28,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399506530] [2024-06-20 15:29:28,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:28,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:28,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:28,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399506530] [2024-06-20 15:29:28,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399506530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:28,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424740768] [2024-06-20 15:29:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:28,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:28,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:28,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:28,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 515 places, 658 transitions, 7731 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:28,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:28,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:28,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:30,788 INFO L124 PetriNetUnfolderBase]: 4498/7710 cut-off events. [2024-06-20 15:29:30,788 INFO L125 PetriNetUnfolderBase]: For 1294844/1294844 co-relation queries the response was YES. [2024-06-20 15:29:30,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57494 conditions, 7710 events. 4498/7710 cut-off events. For 1294844/1294844 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 56042 event pairs, 721 based on Foata normal form. 6/7708 useless extension candidates. Maximal degree in co-relation 57273. Up to 6078 conditions per place. [2024-06-20 15:29:30,920 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 569 selfloop transitions, 118 changer transitions 0/695 dead transitions. [2024-06-20 15:29:30,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 695 transitions, 10124 flow [2024-06-20 15:29:30,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:30,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 15:29:30,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6189024390243902 [2024-06-20 15:29:30,922 INFO L175 Difference]: Start difference. First operand has 515 places, 658 transitions, 7731 flow. Second operand 8 states and 203 transitions. [2024-06-20 15:29:30,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 695 transitions, 10124 flow [2024-06-20 15:29:39,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 695 transitions, 9964 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-20 15:29:39,592 INFO L231 Difference]: Finished difference. Result has 517 places, 661 transitions, 7908 flow [2024-06-20 15:29:39,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7571, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7908, PETRI_PLACES=517, PETRI_TRANSITIONS=661} [2024-06-20 15:29:39,592 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-20 15:29:39,592 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 661 transitions, 7908 flow [2024-06-20 15:29:39,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:39,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:39,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:39,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-20 15:29:39,593 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)] === [2024-06-20 15:29:39,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:39,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1283441178, now seen corresponding path program 3 times [2024-06-20 15:29:39,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:39,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217412008] [2024-06-20 15:29:39,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:39,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:39,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:39,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:39,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217412008] [2024-06-20 15:29:39,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217412008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:39,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:39,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:29:39,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963359252] [2024-06-20 15:29:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:39,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:29:39,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:39,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:29:39,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:29:39,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:39,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 661 transitions, 7908 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:39,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:39,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:39,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:41,632 INFO L124 PetriNetUnfolderBase]: 4485/7697 cut-off events. [2024-06-20 15:29:41,632 INFO L125 PetriNetUnfolderBase]: For 1262508/1262508 co-relation queries the response was YES. [2024-06-20 15:29:41,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56780 conditions, 7697 events. 4485/7697 cut-off events. For 1262508/1262508 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 56064 event pairs, 723 based on Foata normal form. 6/7695 useless extension candidates. Maximal degree in co-relation 56559. Up to 6072 conditions per place. [2024-06-20 15:29:41,769 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 564 selfloop transitions, 120 changer transitions 0/692 dead transitions. [2024-06-20 15:29:41,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 692 transitions, 9922 flow [2024-06-20 15:29:41,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:29:41,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:29:41,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-20 15:29:41,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:29:41,771 INFO L175 Difference]: Start difference. First operand has 517 places, 661 transitions, 7908 flow. Second operand 8 states and 200 transitions. [2024-06-20 15:29:41,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 692 transitions, 9922 flow [2024-06-20 15:29:51,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 692 transitions, 9721 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-20 15:29:51,584 INFO L231 Difference]: Finished difference. Result has 522 places, 661 transitions, 7951 flow [2024-06-20 15:29:51,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7707, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7951, PETRI_PLACES=522, PETRI_TRANSITIONS=661} [2024-06-20 15:29:51,585 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-20 15:29:51,585 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 661 transitions, 7951 flow [2024-06-20 15:29:51,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:51,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:29:51,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:29:51,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-20 15:29:51,586 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)] === [2024-06-20 15:29:51,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:29:51,586 INFO L85 PathProgramCache]: Analyzing trace with hash 941932614, now seen corresponding path program 4 times [2024-06-20 15:29:51,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:29:51,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468410277] [2024-06-20 15:29:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:29:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:29:51,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:29:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:29:51,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:29:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468410277] [2024-06-20 15:29:51,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468410277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:29:51,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:29:51,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:29:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790855631] [2024-06-20 15:29:51,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:29:51,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:29:51,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:29:51,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:29:51,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:29:51,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:29:51,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 661 transitions, 7951 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:29:51,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:29:51,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:29:51,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:29:53,820 INFO L124 PetriNetUnfolderBase]: 4652/7996 cut-off events. [2024-06-20 15:29:53,821 INFO L125 PetriNetUnfolderBase]: For 1550158/1550158 co-relation queries the response was YES. [2024-06-20 15:29:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62204 conditions, 7996 events. 4652/7996 cut-off events. For 1550158/1550158 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 58575 event pairs, 1063 based on Foata normal form. 6/7992 useless extension candidates. Maximal degree in co-relation 61982. Up to 6301 conditions per place. [2024-06-20 15:29:53,961 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 636 selfloop transitions, 70 changer transitions 0/714 dead transitions. [2024-06-20 15:29:53,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 714 transitions, 10165 flow [2024-06-20 15:29:53,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:29:53,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:29:53,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-20 15:29:53,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6449864498644986 [2024-06-20 15:29:53,962 INFO L175 Difference]: Start difference. First operand has 522 places, 661 transitions, 7951 flow. Second operand 9 states and 238 transitions. [2024-06-20 15:29:53,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 714 transitions, 10165 flow [2024-06-20 15:30:03,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 714 transitions, 9926 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:03,931 INFO L231 Difference]: Finished difference. Result has 525 places, 663 transitions, 7916 flow [2024-06-20 15:30:03,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7712, PETRI_DIFFERENCE_MINUEND_PLACES=516, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=593, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7916, PETRI_PLACES=525, PETRI_TRANSITIONS=663} [2024-06-20 15:30:03,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 483 predicate places. [2024-06-20 15:30:03,932 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 663 transitions, 7916 flow [2024-06-20 15:30:03,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:03,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:03,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:03,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-20 15:30:03,932 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)] === [2024-06-20 15:30:03,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:03,933 INFO L85 PathProgramCache]: Analyzing trace with hash 793658470, now seen corresponding path program 4 times [2024-06-20 15:30:03,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:03,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009047512] [2024-06-20 15:30:03,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:03,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:04,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:04,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:04,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009047512] [2024-06-20 15:30:04,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009047512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:04,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:04,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:04,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185857484] [2024-06-20 15:30:04,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:04,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:04,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:04,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:04,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:04,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:04,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 663 transitions, 7916 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:04,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:04,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:04,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:06,032 INFO L124 PetriNetUnfolderBase]: 4639/7928 cut-off events. [2024-06-20 15:30:06,032 INFO L125 PetriNetUnfolderBase]: For 1518983/1518983 co-relation queries the response was YES. [2024-06-20 15:30:06,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61120 conditions, 7928 events. 4639/7928 cut-off events. For 1518983/1518983 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 57845 event pairs, 1151 based on Foata normal form. 6/7915 useless extension candidates. Maximal degree in co-relation 60897. Up to 6810 conditions per place. [2024-06-20 15:30:06,183 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 586 selfloop transitions, 95 changer transitions 0/689 dead transitions. [2024-06-20 15:30:06,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 689 transitions, 9642 flow [2024-06-20 15:30:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:06,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-20 15:30:06,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-20 15:30:06,184 INFO L175 Difference]: Start difference. First operand has 525 places, 663 transitions, 7916 flow. Second operand 7 states and 176 transitions. [2024-06-20 15:30:06,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 689 transitions, 9642 flow [2024-06-20 15:30:16,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 689 transitions, 9456 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:16,163 INFO L231 Difference]: Finished difference. Result has 526 places, 663 transitions, 7924 flow [2024-06-20 15:30:16,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7730, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7924, PETRI_PLACES=526, PETRI_TRANSITIONS=663} [2024-06-20 15:30:16,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 484 predicate places. [2024-06-20 15:30:16,164 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 663 transitions, 7924 flow [2024-06-20 15:30:16,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:16,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:16,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:16,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-20 15:30:16,165 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:16,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:16,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1285462450, now seen corresponding path program 5 times [2024-06-20 15:30:16,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:16,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013127033] [2024-06-20 15:30:16,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:16,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:16,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:16,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:16,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013127033] [2024-06-20 15:30:16,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013127033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:16,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:16,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:30:16,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19544487] [2024-06-20 15:30:16,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:16,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:30:16,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:16,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:30:16,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:30:16,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:16,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 663 transitions, 7924 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:16,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:16,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:16,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:18,269 INFO L124 PetriNetUnfolderBase]: 4667/8025 cut-off events. [2024-06-20 15:30:18,270 INFO L125 PetriNetUnfolderBase]: For 1557105/1557105 co-relation queries the response was YES. [2024-06-20 15:30:18,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61510 conditions, 8025 events. 4667/8025 cut-off events. For 1557105/1557105 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 58892 event pairs, 1157 based on Foata normal form. 8/8027 useless extension candidates. Maximal degree in co-relation 61286. Up to 6745 conditions per place. [2024-06-20 15:30:18,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 633 selfloop transitions, 68 changer transitions 0/709 dead transitions. [2024-06-20 15:30:18,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 709 transitions, 9796 flow [2024-06-20 15:30:18,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:18,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:18,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-20 15:30:18,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314363143631436 [2024-06-20 15:30:18,417 INFO L175 Difference]: Start difference. First operand has 526 places, 663 transitions, 7924 flow. Second operand 9 states and 233 transitions. [2024-06-20 15:30:18,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 709 transitions, 9796 flow [2024-06-20 15:30:28,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 709 transitions, 9623 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-20 15:30:28,734 INFO L231 Difference]: Finished difference. Result has 529 places, 664 transitions, 7919 flow [2024-06-20 15:30:28,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7751, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7919, PETRI_PLACES=529, PETRI_TRANSITIONS=664} [2024-06-20 15:30:28,735 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-20 15:30:28,735 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 664 transitions, 7919 flow [2024-06-20 15:30:28,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:28,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:28,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:28,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-20 15:30:28,736 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:28,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:28,736 INFO L85 PathProgramCache]: Analyzing trace with hash -2127897794, now seen corresponding path program 6 times [2024-06-20 15:30:28,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:28,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077374472] [2024-06-20 15:30:28,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:28,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:28,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:28,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077374472] [2024-06-20 15:30:28,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077374472] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:28,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:28,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:30:28,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776823262] [2024-06-20 15:30:28,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:28,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:30:28,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:28,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:30:28,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:30:28,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:28,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 664 transitions, 7919 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:28,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:28,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:28,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:30,942 INFO L124 PetriNetUnfolderBase]: 4654/7983 cut-off events. [2024-06-20 15:30:30,942 INFO L125 PetriNetUnfolderBase]: For 1505201/1505201 co-relation queries the response was YES. [2024-06-20 15:30:31,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60616 conditions, 7983 events. 4654/7983 cut-off events. For 1505201/1505201 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 58479 event pairs, 1147 based on Foata normal form. 6/7974 useless extension candidates. Maximal degree in co-relation 60391. Up to 7072 conditions per place. [2024-06-20 15:30:31,088 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 641 selfloop transitions, 54 changer transitions 0/703 dead transitions. [2024-06-20 15:30:31,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 703 transitions, 9441 flow [2024-06-20 15:30:31,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-06-20 15:30:31,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:30:31,089 INFO L175 Difference]: Start difference. First operand has 529 places, 664 transitions, 7919 flow. Second operand 9 states and 225 transitions. [2024-06-20 15:30:31,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 703 transitions, 9441 flow [2024-06-20 15:30:41,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 703 transitions, 9264 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 15:30:41,990 INFO L231 Difference]: Finished difference. Result has 531 places, 664 transitions, 7854 flow [2024-06-20 15:30:41,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7742, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7854, PETRI_PLACES=531, PETRI_TRANSITIONS=664} [2024-06-20 15:30:41,991 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-20 15:30:41,991 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 664 transitions, 7854 flow [2024-06-20 15:30:41,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:41,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:41,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:41,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-20 15:30:41,992 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:41,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1977343814, now seen corresponding path program 7 times [2024-06-20 15:30:41,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:41,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411872176] [2024-06-20 15:30:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:41,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:42,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:42,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411872176] [2024-06-20 15:30:42,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411872176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:42,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:42,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:30:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031375418] [2024-06-20 15:30:42,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:42,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:30:42,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:42,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:30:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:30:42,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:42,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 664 transitions, 7854 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:42,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:42,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:42,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:44,072 INFO L124 PetriNetUnfolderBase]: 4682/8052 cut-off events. [2024-06-20 15:30:44,073 INFO L125 PetriNetUnfolderBase]: For 1543594/1543594 co-relation queries the response was YES. [2024-06-20 15:30:44,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60857 conditions, 8052 events. 4682/8052 cut-off events. For 1543594/1543594 co-relation queries the response was YES. Maximal size of possible extension queue 625. Compared 59107 event pairs, 1182 based on Foata normal form. 8/8056 useless extension candidates. Maximal degree in co-relation 60631. Up to 7151 conditions per place. [2024-06-20 15:30:44,230 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 625 selfloop transitions, 67 changer transitions 0/700 dead transitions. [2024-06-20 15:30:44,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 700 transitions, 9376 flow [2024-06-20 15:30:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:30:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:30:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-20 15:30:44,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6070460704607046 [2024-06-20 15:30:44,231 INFO L175 Difference]: Start difference. First operand has 531 places, 664 transitions, 7854 flow. Second operand 9 states and 224 transitions. [2024-06-20 15:30:44,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 700 transitions, 9376 flow [2024-06-20 15:30:55,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 700 transitions, 9265 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-20 15:30:55,091 INFO L231 Difference]: Finished difference. Result has 532 places, 665 transitions, 7910 flow [2024-06-20 15:30:55,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7743, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7910, PETRI_PLACES=532, PETRI_TRANSITIONS=665} [2024-06-20 15:30:55,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-20 15:30:55,092 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 665 transitions, 7910 flow [2024-06-20 15:30:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:55,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:30:55,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:30:55,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-20 15:30:55,093 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:30:55,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:30:55,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1862200328, now seen corresponding path program 5 times [2024-06-20 15:30:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:30:55,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498423438] [2024-06-20 15:30:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:30:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:30:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:30:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:30:55,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:30:55,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498423438] [2024-06-20 15:30:55,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498423438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:30:55,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:30:55,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:30:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143995946] [2024-06-20 15:30:55,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:30:55,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:30:55,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:30:55,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:30:55,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:30:55,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:30:55,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 665 transitions, 7910 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:30:55,249 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:30:55,249 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:30:55,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:30:57,205 INFO L124 PetriNetUnfolderBase]: 4756/8148 cut-off events. [2024-06-20 15:30:57,205 INFO L125 PetriNetUnfolderBase]: For 1627959/1627959 co-relation queries the response was YES. [2024-06-20 15:30:57,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63098 conditions, 8148 events. 4756/8148 cut-off events. For 1627959/1627959 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59907 event pairs, 1203 based on Foata normal form. 6/8144 useless extension candidates. Maximal degree in co-relation 62871. Up to 7117 conditions per place. [2024-06-20 15:30:57,361 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 597 selfloop transitions, 86 changer transitions 0/691 dead transitions. [2024-06-20 15:30:57,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 691 transitions, 9741 flow [2024-06-20 15:30:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:30:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:30:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 15:30:57,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-20 15:30:57,363 INFO L175 Difference]: Start difference. First operand has 532 places, 665 transitions, 7910 flow. Second operand 7 states and 175 transitions. [2024-06-20 15:30:57,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 691 transitions, 9741 flow [2024-06-20 15:31:08,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 691 transitions, 9596 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 15:31:08,603 INFO L231 Difference]: Finished difference. Result has 533 places, 669 transitions, 8064 flow [2024-06-20 15:31:08,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8064, PETRI_PLACES=533, PETRI_TRANSITIONS=669} [2024-06-20 15:31:08,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-20 15:31:08,603 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 669 transitions, 8064 flow [2024-06-20 15:31:08,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:08,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:08,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:08,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-20 15:31:08,604 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:08,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:08,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1548031396, now seen corresponding path program 6 times [2024-06-20 15:31:08,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:08,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722919175] [2024-06-20 15:31:08,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:08,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:08,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:08,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:08,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:08,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722919175] [2024-06-20 15:31:08,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722919175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:08,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:08,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:08,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561215910] [2024-06-20 15:31:08,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:08,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:08,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:08,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:08,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:08,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:08,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 669 transitions, 8064 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:08,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:08,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:08,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:10,611 INFO L124 PetriNetUnfolderBase]: 4738/8130 cut-off events. [2024-06-20 15:31:10,612 INFO L125 PetriNetUnfolderBase]: For 1592647/1592647 co-relation queries the response was YES. [2024-06-20 15:31:10,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62039 conditions, 8130 events. 4738/8130 cut-off events. For 1592647/1592647 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 59836 event pairs, 1197 based on Foata normal form. 8/8130 useless extension candidates. Maximal degree in co-relation 61810. Up to 7153 conditions per place. [2024-06-20 15:31:10,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 593 selfloop transitions, 86 changer transitions 0/687 dead transitions. [2024-06-20 15:31:10,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 687 transitions, 9488 flow [2024-06-20 15:31:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:31:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:31:10,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-20 15:31:10,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-20 15:31:10,789 INFO L175 Difference]: Start difference. First operand has 533 places, 669 transitions, 8064 flow. Second operand 7 states and 174 transitions. [2024-06-20 15:31:10,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 687 transitions, 9488 flow [2024-06-20 15:31:23,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 687 transitions, 9361 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-20 15:31:23,471 INFO L231 Difference]: Finished difference. Result has 537 places, 669 transitions, 8118 flow [2024-06-20 15:31:23,471 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7937, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8118, PETRI_PLACES=537, PETRI_TRANSITIONS=669} [2024-06-20 15:31:23,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-20 15:31:23,472 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 669 transitions, 8118 flow [2024-06-20 15:31:23,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:23,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:23,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:23,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-20 15:31:23,472 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:23,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:23,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1547704780, now seen corresponding path program 8 times [2024-06-20 15:31:23,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:23,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599563948] [2024-06-20 15:31:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:23,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:23,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:23,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599563948] [2024-06-20 15:31:23,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599563948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:23,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:23,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:31:23,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10372493] [2024-06-20 15:31:23,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:23,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:31:23,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:23,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:31:23,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:31:23,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:23,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 669 transitions, 8118 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:23,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:23,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:23,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:26,150 INFO L124 PetriNetUnfolderBase]: 4804/8248 cut-off events. [2024-06-20 15:31:26,150 INFO L125 PetriNetUnfolderBase]: For 1672556/1672556 co-relation queries the response was YES. [2024-06-20 15:31:26,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64130 conditions, 8248 events. 4804/8248 cut-off events. For 1672556/1672556 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 60825 event pairs, 1192 based on Foata normal form. 6/8248 useless extension candidates. Maximal degree in co-relation 63899. Up to 7317 conditions per place. [2024-06-20 15:31:26,285 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 645 selfloop transitions, 55 changer transitions 0/708 dead transitions. [2024-06-20 15:31:26,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 708 transitions, 9982 flow [2024-06-20 15:31:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:31:26,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:31:26,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 241 transitions. [2024-06-20 15:31:26,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878048780487805 [2024-06-20 15:31:26,287 INFO L175 Difference]: Start difference. First operand has 537 places, 669 transitions, 8118 flow. Second operand 10 states and 241 transitions. [2024-06-20 15:31:26,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 708 transitions, 9982 flow [2024-06-20 15:31:38,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 708 transitions, 9811 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:31:38,059 INFO L231 Difference]: Finished difference. Result has 543 places, 671 transitions, 8127 flow [2024-06-20 15:31:38,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7947, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=669, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8127, PETRI_PLACES=543, PETRI_TRANSITIONS=671} [2024-06-20 15:31:38,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 501 predicate places. [2024-06-20 15:31:38,060 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 671 transitions, 8127 flow [2024-06-20 15:31:38,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:38,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:38,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:38,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-20 15:31:38,060 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:38,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:38,061 INFO L85 PathProgramCache]: Analyzing trace with hash -2120484764, now seen corresponding path program 9 times [2024-06-20 15:31:38,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:38,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321358441] [2024-06-20 15:31:38,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:38,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:38,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:38,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:38,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:38,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321358441] [2024-06-20 15:31:38,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321358441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:38,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:38,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:31:38,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806369877] [2024-06-20 15:31:38,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:38,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:31:38,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:38,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:31:38,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:31:38,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:38,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 671 transitions, 8127 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:38,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:38,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:38,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:40,699 INFO L124 PetriNetUnfolderBase]: 4786/8220 cut-off events. [2024-06-20 15:31:40,700 INFO L125 PetriNetUnfolderBase]: For 1636534/1636534 co-relation queries the response was YES. [2024-06-20 15:31:40,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62935 conditions, 8220 events. 4786/8220 cut-off events. For 1636534/1636534 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 60506 event pairs, 1200 based on Foata normal form. 8/8224 useless extension candidates. Maximal degree in co-relation 62702. Up to 7339 conditions per place. [2024-06-20 15:31:40,856 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 643 selfloop transitions, 52 changer transitions 0/703 dead transitions. [2024-06-20 15:31:40,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 703 transitions, 9621 flow [2024-06-20 15:31:40,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:31:40,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:31:40,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-20 15:31:40,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-20 15:31:40,858 INFO L175 Difference]: Start difference. First operand has 543 places, 671 transitions, 8127 flow. Second operand 9 states and 219 transitions. [2024-06-20 15:31:40,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 703 transitions, 9621 flow [2024-06-20 15:31:54,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 703 transitions, 9479 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 15:31:54,288 INFO L231 Difference]: Finished difference. Result has 545 places, 671 transitions, 8094 flow [2024-06-20 15:31:54,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7985, PETRI_DIFFERENCE_MINUEND_PLACES=536, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8094, PETRI_PLACES=545, PETRI_TRANSITIONS=671} [2024-06-20 15:31:54,288 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-20 15:31:54,288 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 671 transitions, 8094 flow [2024-06-20 15:31:54,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:54,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:31:54,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:31:54,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-20 15:31:54,289 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:31:54,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:31:54,289 INFO L85 PathProgramCache]: Analyzing trace with hash 790358838, now seen corresponding path program 7 times [2024-06-20 15:31:54,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:31:54,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758105265] [2024-06-20 15:31:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:31:54,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:31:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:31:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:31:54,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:31:54,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758105265] [2024-06-20 15:31:54,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758105265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:31:54,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:31:54,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:31:54,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898534841] [2024-06-20 15:31:54,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:31:54,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:31:54,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:31:54,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:31:54,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:31:54,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:31:54,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 671 transitions, 8094 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:31:54,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:31:54,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:31:54,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:31:56,930 INFO L124 PetriNetUnfolderBase]: 4834/8294 cut-off events. [2024-06-20 15:31:56,931 INFO L125 PetriNetUnfolderBase]: For 1702185/1702185 co-relation queries the response was YES. [2024-06-20 15:31:57,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64060 conditions, 8294 events. 4834/8294 cut-off events. For 1702185/1702185 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 61236 event pairs, 1104 based on Foata normal form. 8/8294 useless extension candidates. Maximal degree in co-relation 63826. Up to 7123 conditions per place. [2024-06-20 15:31:57,078 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 576 selfloop transitions, 113 changer transitions 0/697 dead transitions. [2024-06-20 15:31:57,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 697 transitions, 9928 flow [2024-06-20 15:31:57,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:31:57,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:31:57,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-20 15:31:57,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-20 15:31:57,079 INFO L175 Difference]: Start difference. First operand has 545 places, 671 transitions, 8094 flow. Second operand 8 states and 198 transitions. [2024-06-20 15:31:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 697 transitions, 9928 flow [2024-06-20 15:32:08,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 697 transitions, 9827 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 15:32:08,838 INFO L231 Difference]: Finished difference. Result has 547 places, 673 transitions, 8328 flow [2024-06-20 15:32:08,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8328, PETRI_PLACES=547, PETRI_TRANSITIONS=673} [2024-06-20 15:32:08,839 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 505 predicate places. [2024-06-20 15:32:08,839 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 673 transitions, 8328 flow [2024-06-20 15:32:08,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:08,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:08,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:08,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-20 15:32:08,839 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:08,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:08,840 INFO L85 PathProgramCache]: Analyzing trace with hash 207011132, now seen corresponding path program 8 times [2024-06-20 15:32:08,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:08,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652663015] [2024-06-20 15:32:08,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:08,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:08,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:08,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:08,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652663015] [2024-06-20 15:32:08,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652663015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:08,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:08,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:08,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64195929] [2024-06-20 15:32:08,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:08,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:08,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:08,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:08,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:08,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:08,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 673 transitions, 8328 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:08,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:08,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:08,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:11,420 INFO L124 PetriNetUnfolderBase]: 4862/8336 cut-off events. [2024-06-20 15:32:11,420 INFO L125 PetriNetUnfolderBase]: For 1728552/1728552 co-relation queries the response was YES. [2024-06-20 15:32:11,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65095 conditions, 8336 events. 4862/8336 cut-off events. For 1728552/1728552 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 61519 event pairs, 1236 based on Foata normal form. 8/8336 useless extension candidates. Maximal degree in co-relation 64859. Up to 7349 conditions per place. [2024-06-20 15:32:11,560 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 587 selfloop transitions, 98 changer transitions 0/693 dead transitions. [2024-06-20 15:32:11,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 693 transitions, 9806 flow [2024-06-20 15:32:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:32:11,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:32:11,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 15:32:11,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-20 15:32:11,561 INFO L175 Difference]: Start difference. First operand has 547 places, 673 transitions, 8328 flow. Second operand 8 states and 194 transitions. [2024-06-20 15:32:11,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 693 transitions, 9806 flow [2024-06-20 15:32:24,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 693 transitions, 9525 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-20 15:32:24,602 INFO L231 Difference]: Finished difference. Result has 549 places, 674 transitions, 8294 flow [2024-06-20 15:32:24,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8051, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=575, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8294, PETRI_PLACES=549, PETRI_TRANSITIONS=674} [2024-06-20 15:32:24,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 507 predicate places. [2024-06-20 15:32:24,602 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 674 transitions, 8294 flow [2024-06-20 15:32:24,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:24,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:24,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:24,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-20 15:32:24,603 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:24,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:24,603 INFO L85 PathProgramCache]: Analyzing trace with hash -20890018, now seen corresponding path program 9 times [2024-06-20 15:32:24,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:24,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662159805] [2024-06-20 15:32:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:24,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:24,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:24,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662159805] [2024-06-20 15:32:24,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662159805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:24,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:24,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:24,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698437065] [2024-06-20 15:32:24,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:24,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:24,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:24,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:24,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:24,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:24,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 674 transitions, 8294 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:24,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:24,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:24,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:27,094 INFO L124 PetriNetUnfolderBase]: 4844/8304 cut-off events. [2024-06-20 15:32:27,094 INFO L125 PetriNetUnfolderBase]: For 1665702/1665702 co-relation queries the response was YES. [2024-06-20 15:32:27,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63591 conditions, 8304 events. 4844/8304 cut-off events. For 1665702/1665702 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 61265 event pairs, 1225 based on Foata normal form. 8/8304 useless extension candidates. Maximal degree in co-relation 63354. Up to 7279 conditions per place. [2024-06-20 15:32:27,365 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 589 selfloop transitions, 94 changer transitions 0/691 dead transitions. [2024-06-20 15:32:27,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 691 transitions, 9724 flow [2024-06-20 15:32:27,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:32:27,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:32:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-20 15:32:27,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-20 15:32:27,366 INFO L175 Difference]: Start difference. First operand has 549 places, 674 transitions, 8294 flow. Second operand 6 states and 152 transitions. [2024-06-20 15:32:27,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 691 transitions, 9724 flow [2024-06-20 15:32:40,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 548 places, 691 transitions, 9503 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:32:40,541 INFO L231 Difference]: Finished difference. Result has 549 places, 674 transitions, 8277 flow [2024-06-20 15:32:40,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8073, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8277, PETRI_PLACES=549, PETRI_TRANSITIONS=674} [2024-06-20 15:32:40,542 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 507 predicate places. [2024-06-20 15:32:40,542 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 674 transitions, 8277 flow [2024-06-20 15:32:40,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:40,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:40,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:40,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-20 15:32:40,543 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:40,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:40,543 INFO L85 PathProgramCache]: Analyzing trace with hash -21216448, now seen corresponding path program 10 times [2024-06-20 15:32:40,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:40,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886842192] [2024-06-20 15:32:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:40,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:40,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:40,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:40,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886842192] [2024-06-20 15:32:40,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886842192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:40,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:40,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:32:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955848862] [2024-06-20 15:32:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:40,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:32:40,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:40,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:32:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:32:40,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:40,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 674 transitions, 8277 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:40,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:40,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:40,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:43,172 INFO L124 PetriNetUnfolderBase]: 4831/8250 cut-off events. [2024-06-20 15:32:43,173 INFO L125 PetriNetUnfolderBase]: For 1603930/1603930 co-relation queries the response was YES. [2024-06-20 15:32:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62509 conditions, 8250 events. 4831/8250 cut-off events. For 1603930/1603930 co-relation queries the response was YES. Maximal size of possible extension queue 642. Compared 60688 event pairs, 1165 based on Foata normal form. 6/8235 useless extension candidates. Maximal degree in co-relation 62271. Up to 7032 conditions per place. [2024-06-20 15:32:43,321 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 588 selfloop transitions, 101 changer transitions 0/697 dead transitions. [2024-06-20 15:32:43,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 697 transitions, 9745 flow [2024-06-20 15:32:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:32:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:32:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-20 15:32:43,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-20 15:32:43,323 INFO L175 Difference]: Start difference. First operand has 549 places, 674 transitions, 8277 flow. Second operand 6 states and 156 transitions. [2024-06-20 15:32:43,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 697 transitions, 9745 flow [2024-06-20 15:32:56,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 697 transitions, 9548 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:32:56,573 INFO L231 Difference]: Finished difference. Result has 550 places, 674 transitions, 8290 flow [2024-06-20 15:32:56,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8080, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8290, PETRI_PLACES=550, PETRI_TRANSITIONS=674} [2024-06-20 15:32:56,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-20 15:32:56,574 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 674 transitions, 8290 flow [2024-06-20 15:32:56,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:56,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:32:56,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:32:56,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-20 15:32:56,574 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:32:56,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:32:56,575 INFO L85 PathProgramCache]: Analyzing trace with hash -21216634, now seen corresponding path program 10 times [2024-06-20 15:32:56,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:32:56,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652879] [2024-06-20 15:32:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:32:56,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:32:56,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:32:56,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:32:56,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:32:56,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652879] [2024-06-20 15:32:56,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652879] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:32:56,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:32:56,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:32:56,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243834634] [2024-06-20 15:32:56,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:32:56,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:32:56,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:32:56,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:32:56,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:32:56,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:32:56,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 674 transitions, 8290 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:32:56,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:32:56,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:32:56,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:32:59,330 INFO L124 PetriNetUnfolderBase]: 4905/8419 cut-off events. [2024-06-20 15:32:59,330 INFO L125 PetriNetUnfolderBase]: For 1687888/1687888 co-relation queries the response was YES. [2024-06-20 15:32:59,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64684 conditions, 8419 events. 4905/8419 cut-off events. For 1687888/1687888 co-relation queries the response was YES. Maximal size of possible extension queue 648. Compared 62256 event pairs, 1217 based on Foata normal form. 6/8419 useless extension candidates. Maximal degree in co-relation 64446. Up to 7477 conditions per place. [2024-06-20 15:32:59,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 651 selfloop transitions, 59 changer transitions 0/718 dead transitions. [2024-06-20 15:32:59,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 718 transitions, 10235 flow [2024-06-20 15:32:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:32:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:32:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 298 transitions. [2024-06-20 15:32:59,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5590994371482176 [2024-06-20 15:32:59,483 INFO L175 Difference]: Start difference. First operand has 550 places, 674 transitions, 8290 flow. Second operand 13 states and 298 transitions. [2024-06-20 15:32:59,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 718 transitions, 10235 flow [2024-06-20 15:33:12,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 718 transitions, 9982 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 15:33:12,255 INFO L231 Difference]: Finished difference. Result has 557 places, 678 transitions, 8278 flow [2024-06-20 15:33:12,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8044, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=8278, PETRI_PLACES=557, PETRI_TRANSITIONS=678} [2024-06-20 15:33:12,256 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 515 predicate places. [2024-06-20 15:33:12,256 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 678 transitions, 8278 flow [2024-06-20 15:33:12,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:12,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:12,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:12,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-20 15:33:12,256 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:12,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash -604511316, now seen corresponding path program 11 times [2024-06-20 15:33:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:12,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068870893] [2024-06-20 15:33:12,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:12,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:12,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:12,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:12,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068870893] [2024-06-20 15:33:12,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068870893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:12,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:12,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:33:12,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889474195] [2024-06-20 15:33:12,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:12,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:33:12,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:12,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:33:12,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:33:12,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:12,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 678 transitions, 8278 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:12,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:12,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:12,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:14,796 INFO L124 PetriNetUnfolderBase]: 4941/8473 cut-off events. [2024-06-20 15:33:14,797 INFO L125 PetriNetUnfolderBase]: For 1665875/1665875 co-relation queries the response was YES. [2024-06-20 15:33:15,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64600 conditions, 8473 events. 4941/8473 cut-off events. For 1665875/1665875 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 62679 event pairs, 1217 based on Foata normal form. 6/8467 useless extension candidates. Maximal degree in co-relation 64363. Up to 7433 conditions per place. [2024-06-20 15:33:15,066 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 649 selfloop transitions, 66 changer transitions 0/723 dead transitions. [2024-06-20 15:33:15,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 723 transitions, 10217 flow [2024-06-20 15:33:15,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:33:15,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:33:15,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 280 transitions. [2024-06-20 15:33:15,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-20 15:33:15,067 INFO L175 Difference]: Start difference. First operand has 557 places, 678 transitions, 8278 flow. Second operand 12 states and 280 transitions. [2024-06-20 15:33:15,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 723 transitions, 10217 flow [2024-06-20 15:33:26,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 723 transitions, 10071 flow, removed 18 selfloop flow, removed 10 redundant places. [2024-06-20 15:33:26,737 INFO L231 Difference]: Finished difference. Result has 561 places, 683 transitions, 8383 flow [2024-06-20 15:33:26,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8132, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=612, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=8383, PETRI_PLACES=561, PETRI_TRANSITIONS=683} [2024-06-20 15:33:26,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 519 predicate places. [2024-06-20 15:33:26,738 INFO L495 AbstractCegarLoop]: Abstraction has has 561 places, 683 transitions, 8383 flow [2024-06-20 15:33:26,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:26,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:26,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:26,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-20 15:33:26,738 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:26,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash -604511130, now seen corresponding path program 11 times [2024-06-20 15:33:26,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:26,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856492835] [2024-06-20 15:33:26,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:26,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:26,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:26,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856492835] [2024-06-20 15:33:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856492835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:26,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:26,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:26,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644140237] [2024-06-20 15:33:26,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:26,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:26,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:26,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:26,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:26,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:26,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 561 places, 683 transitions, 8383 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:26,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:26,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:26,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:33:29,459 INFO L124 PetriNetUnfolderBase]: 4961/8483 cut-off events. [2024-06-20 15:33:29,460 INFO L125 PetriNetUnfolderBase]: For 1689479/1689479 co-relation queries the response was YES. [2024-06-20 15:33:29,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65043 conditions, 8483 events. 4961/8483 cut-off events. For 1689479/1689479 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 62443 event pairs, 803 based on Foata normal form. 6/8481 useless extension candidates. Maximal degree in co-relation 64803. Up to 6696 conditions per place. [2024-06-20 15:33:29,759 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 573 selfloop transitions, 135 changer transitions 0/716 dead transitions. [2024-06-20 15:33:29,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 716 transitions, 10258 flow [2024-06-20 15:33:29,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:33:29,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:33:29,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-20 15:33:29,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-20 15:33:29,761 INFO L175 Difference]: Start difference. First operand has 561 places, 683 transitions, 8383 flow. Second operand 7 states and 186 transitions. [2024-06-20 15:33:29,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 716 transitions, 10258 flow [2024-06-20 15:33:42,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 716 transitions, 10108 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-20 15:33:42,978 INFO L231 Difference]: Finished difference. Result has 560 places, 684 transitions, 8547 flow [2024-06-20 15:33:42,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8233, PETRI_DIFFERENCE_MINUEND_PLACES=553, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8547, PETRI_PLACES=560, PETRI_TRANSITIONS=684} [2024-06-20 15:33:42,978 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 518 predicate places. [2024-06-20 15:33:42,978 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 684 transitions, 8547 flow [2024-06-20 15:33:42,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:42,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:33:42,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:33:42,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-20 15:33:42,979 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 15:33:42,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:33:42,979 INFO L85 PathProgramCache]: Analyzing trace with hash -109545058, now seen corresponding path program 12 times [2024-06-20 15:33:42,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:33:42,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382552826] [2024-06-20 15:33:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:33:42,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:33:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:33:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:33:43,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:33:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382552826] [2024-06-20 15:33:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382552826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:33:43,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:33:43,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:33:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195288904] [2024-06-20 15:33:43,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:33:43,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:33:43,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:33:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:33:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:33:43,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 41 [2024-06-20 15:33:43,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 684 transitions, 8547 flow. Second operand has 8 states, 8 states have (on average 17.0) internal successors, (136), 8 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:33:43,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:33:43,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 41 [2024-06-20 15:33:43,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15