./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe023_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/safe023_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe023_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe023_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-bcb38a6-m [2024-06-03 18:50:07,013 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:50:07,091 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:50:07,096 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:50:07,097 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:50:07,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:50:07,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:50:07,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:50:07,126 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:50:07,130 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:50:07,130 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:50:07,131 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:50:07,132 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:50:07,133 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:50:07,133 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:50:07,133 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:50:07,134 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:50:07,134 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:50:07,134 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:50:07,135 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:50:07,135 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:50:07,135 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:50:07,136 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:50:07,136 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:50:07,136 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:50:07,136 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:50:07,137 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:50:07,137 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:50:07,137 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:50:07,138 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:50:07,139 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:50:07,139 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:50:07,139 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:50:07,139 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:50:07,140 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:50:07,140 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:50:07,140 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:50:07,140 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:50:07,140 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:50:07,141 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:50:07,141 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:50:07,141 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:50:07,141 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:50:07,142 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:50:07,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:50:07,465 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:50:07,467 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:50:07,468 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:50:07,468 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:50:07,469 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-03 18:50:08,584 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:50:08,864 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:50:08,867 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe023_tso.i [2024-06-03 18:50:08,881 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f38444dd/6963c67b9c604f24a55b5d8be3e869ab/FLAG1d4e56cc7 [2024-06-03 18:50:08,896 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f38444dd/6963c67b9c604f24a55b5d8be3e869ab [2024-06-03 18:50:08,898 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:50:08,899 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:50:08,899 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe023_tso.yml/witness.yml [2024-06-03 18:50:09,034 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:50:09,035 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:50:09,036 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:50:09,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:50:09,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:50:09,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:50:08" (1/2) ... [2024-06-03 18:50:09,042 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e866d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:50:09, skipping insertion in model container [2024-06-03 18:50:09,043 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:50:08" (1/2) ... [2024-06-03 18:50:09,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@54239bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:50:09, skipping insertion in model container [2024-06-03 18:50:09,045 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:50:09" (2/2) ... [2024-06-03 18:50:09,046 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73e866d1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09, skipping insertion in model container [2024-06-03 18:50:09,046 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:50:09" (2/2) ... [2024-06-03 18:50:09,047 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:50:09,098 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:50:09,099 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 18:50:09,100 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 18:50:09,100 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] (((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 18:50:09,100 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:50:09,100 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-03 18:50:09,142 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:50:09,449 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:50:09,458 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:50:09,539 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:50:09,589 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:50:09,590 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09 WrapperNode [2024-06-03 18:50:09,590 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:50:09,591 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:50:09,591 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:50:09,592 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:50:09,598 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,663 INFO L138 Inliner]: procedures = 175, calls = 44, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 18:50:09,665 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:50:09,666 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:50:09,666 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:50:09,666 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:50:09,676 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,676 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,687 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,711 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]. [2024-06-03 18:50:09,712 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,712 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,758 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,760 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,782 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:50:09,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:50:09,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:50:09,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:50:09,785 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (1/1) ... [2024-06-03 18:50:09,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:50:09,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:50:09,825 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) [2024-06-03 18:50:09,831 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 [2024-06-03 18:50:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:50:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:50:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 18:50:09,867 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 18:50:09,867 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 18:50:09,867 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 18:50:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 18:50:09,868 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 18:50:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:50:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:50:09,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:50:09,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:50:09,869 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:50:09,968 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:50:09,970 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:50:10,149 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:50:10,150 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:50:10,232 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:50:10,232 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:50:10,233 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:50:10 BoogieIcfgContainer [2024-06-03 18:50:10,233 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:50:10,235 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:50:10,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:50:10,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:50:10,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:50:08" (1/4) ... [2024-06-03 18:50:10,238 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ac2ae7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:50:10, skipping insertion in model container [2024-06-03 18:50:10,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:50:09" (2/4) ... [2024-06-03 18:50:10,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ac2ae7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:50:10, skipping insertion in model container [2024-06-03 18:50:10,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:50:09" (3/4) ... [2024-06-03 18:50:10,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ac2ae7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:50:10, skipping insertion in model container [2024-06-03 18:50:10,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:50:10" (4/4) ... [2024-06-03 18:50:10,240 INFO L112 eAbstractionObserver]: Analyzing ICFG safe023_tso.i [2024-06-03 18:50:10,256 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:50:10,256 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 18:50:10,256 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:50:10,304 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:50:10,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 18:50:10,373 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 18:50:10,376 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:50:10,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 18:50:10,379 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 18:50:10,382 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 18:50:10,391 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:50:10,398 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;@6967a63b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:50:10,399 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 18:50:10,402 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:50:10,402 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 18:50:10,402 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:50:10,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:10,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:50:10,404 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)] === [2024-06-03 18:50:10,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1787024188, now seen corresponding path program 1 times [2024-06-03 18:50:10,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:10,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630672146] [2024-06-03 18:50:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:10,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:10,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:10,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630672146] [2024-06-03 18:50:10,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630672146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:10,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:10,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:50:10,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339315113] [2024-06-03 18:50:10,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:10,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:50:10,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:10,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:50:10,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:50:11,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-03 18:50:11,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:11,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:11,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-03 18:50:11,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:11,215 INFO L124 PetriNetUnfolderBase]: 470/795 cut-off events. [2024-06-03 18:50:11,215 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-06-03 18:50:11,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1596 conditions, 795 events. 470/795 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3833 event pairs, 281 based on Foata normal form. 1/752 useless extension candidates. Maximal degree in co-relation 1581. Up to 736 conditions per place. [2024-06-03 18:50:11,228 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 29 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 18:50:11,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 167 flow [2024-06-03 18:50:11,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:50:11,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:50:11,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-06-03 18:50:11,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6904761904761905 [2024-06-03 18:50:11,242 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 87 transitions. [2024-06-03 18:50:11,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 167 flow [2024-06-03 18:50:11,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 162 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:11,248 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 18:50:11,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 18:50:11,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 18:50:11,255 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 18:50:11,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:11,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:11,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:11,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:50:11,256 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)] === [2024-06-03 18:50:11,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:11,259 INFO L85 PathProgramCache]: Analyzing trace with hash 656708195, now seen corresponding path program 1 times [2024-06-03 18:50:11,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:11,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382297788] [2024-06-03 18:50:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:11,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:11,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:11,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:11,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382297788] [2024-06-03 18:50:11,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382297788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:11,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:11,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:50:11,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296540258] [2024-06-03 18:50:11,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:11,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:50:11,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:11,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:50:11,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:50:11,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:11,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:11,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:11,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:11,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:11,735 INFO L124 PetriNetUnfolderBase]: 781/1325 cut-off events. [2024-06-03 18:50:11,735 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-06-03 18:50:11,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2969 conditions, 1325 events. 781/1325 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6749 event pairs, 376 based on Foata normal form. 5/1321 useless extension candidates. Maximal degree in co-relation 2954. Up to 1146 conditions per place. [2024-06-03 18:50:11,743 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 44 selfloop transitions, 10 changer transitions 0/62 dead transitions. [2024-06-03 18:50:11,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 62 transitions, 284 flow [2024-06-03 18:50:11,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:50:11,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:50:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-06-03 18:50:11,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6726190476190477 [2024-06-03 18:50:11,752 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 113 transitions. [2024-06-03 18:50:11,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 62 transitions, 284 flow [2024-06-03 18:50:11,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:50:11,756 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 173 flow [2024-06-03 18:50:11,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=173, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-06-03 18:50:11,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-03 18:50:11,757 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 173 flow [2024-06-03 18:50:11,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:11,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:11,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:11,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:50:11,761 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:11,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:11,765 INFO L85 PathProgramCache]: Analyzing trace with hash -263580670, now seen corresponding path program 1 times [2024-06-03 18:50:11,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:11,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159276823] [2024-06-03 18:50:11,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:11,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:11,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:11,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159276823] [2024-06-03 18:50:11,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159276823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:11,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:11,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:50:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650681216] [2024-06-03 18:50:11,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:11,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:50:11,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:11,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:50:11,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:50:12,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:12,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 173 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:12,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:12,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:12,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:12,222 INFO L124 PetriNetUnfolderBase]: 789/1357 cut-off events. [2024-06-03 18:50:12,222 INFO L125 PetriNetUnfolderBase]: For 893/934 co-relation queries the response was YES. [2024-06-03 18:50:12,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3596 conditions, 1357 events. 789/1357 cut-off events. For 893/934 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 7079 event pairs, 265 based on Foata normal form. 15/1360 useless extension candidates. Maximal degree in co-relation 3578. Up to 1114 conditions per place. [2024-06-03 18:50:12,230 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 16 changer transitions 0/76 dead transitions. [2024-06-03 18:50:12,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 76 transitions, 405 flow [2024-06-03 18:50:12,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:12,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-03 18:50:12,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-03 18:50:12,232 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 173 flow. Second operand 5 states and 140 transitions. [2024-06-03 18:50:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 76 transitions, 405 flow [2024-06-03 18:50:12,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 76 transitions, 403 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 18:50:12,236 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 248 flow [2024-06-03 18:50:12,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=171, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-03 18:50:12,237 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 18:50:12,237 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 248 flow [2024-06-03 18:50:12,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:12,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:12,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:12,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:50:12,238 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:12,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash -364981210, now seen corresponding path program 1 times [2024-06-03 18:50:12,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:12,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741844338] [2024-06-03 18:50:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:12,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:12,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:12,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741844338] [2024-06-03 18:50:12,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741844338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:12,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:12,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 18:50:12,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018545208] [2024-06-03 18:50:12,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:12,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 18:50:12,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:12,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 18:50:12,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 18:50:12,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:12,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 248 flow. Second operand has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:12,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:12,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:12,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:12,662 INFO L124 PetriNetUnfolderBase]: 773/1297 cut-off events. [2024-06-03 18:50:12,662 INFO L125 PetriNetUnfolderBase]: For 1645/1660 co-relation queries the response was YES. [2024-06-03 18:50:12,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3948 conditions, 1297 events. 773/1297 cut-off events. For 1645/1660 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6615 event pairs, 312 based on Foata normal form. 15/1305 useless extension candidates. Maximal degree in co-relation 3927. Up to 1140 conditions per place. [2024-06-03 18:50:12,671 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2024-06-03 18:50:12,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 65 transitions, 401 flow [2024-06-03 18:50:12,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:50:12,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:50:12,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-06-03 18:50:12,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-03 18:50:12,675 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 248 flow. Second operand 4 states and 107 transitions. [2024-06-03 18:50:12,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 65 transitions, 401 flow [2024-06-03 18:50:12,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 65 transitions, 387 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-06-03 18:50:12,683 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 287 flow [2024-06-03 18:50:12,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=287, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2024-06-03 18:50:12,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-03 18:50:12,685 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 287 flow [2024-06-03 18:50:12,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.5) internal successors, (70), 4 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:12,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:12,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:12,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:50:12,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:12,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:12,686 INFO L85 PathProgramCache]: Analyzing trace with hash -848364989, now seen corresponding path program 1 times [2024-06-03 18:50:12,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:12,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347533855] [2024-06-03 18:50:12,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:12,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:12,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:12,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:12,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347533855] [2024-06-03 18:50:12,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347533855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:12,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:12,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:12,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703642222] [2024-06-03 18:50:12,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:12,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:12,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:12,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:12,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:12,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:12,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 287 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:12,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:12,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:12,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:13,190 INFO L124 PetriNetUnfolderBase]: 781/1330 cut-off events. [2024-06-03 18:50:13,190 INFO L125 PetriNetUnfolderBase]: For 2266/2340 co-relation queries the response was YES. [2024-06-03 18:50:13,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4191 conditions, 1330 events. 781/1330 cut-off events. For 2266/2340 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6821 event pairs, 210 based on Foata normal form. 30/1350 useless extension candidates. Maximal degree in co-relation 4166. Up to 1064 conditions per place. [2024-06-03 18:50:13,200 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 56 selfloop transitions, 20 changer transitions 0/84 dead transitions. [2024-06-03 18:50:13,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 84 transitions, 537 flow [2024-06-03 18:50:13,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:13,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-03 18:50:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-03 18:50:13,202 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 287 flow. Second operand 6 states and 162 transitions. [2024-06-03 18:50:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 84 transitions, 537 flow [2024-06-03 18:50:13,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 84 transitions, 527 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-06-03 18:50:13,206 INFO L231 Difference]: Finished difference. Result has 60 places, 56 transitions, 343 flow [2024-06-03 18:50:13,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=60, PETRI_TRANSITIONS=56} [2024-06-03 18:50:13,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 17 predicate places. [2024-06-03 18:50:13,207 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 56 transitions, 343 flow [2024-06-03 18:50:13,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:13,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:13,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:13,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:50:13,208 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)] === [2024-06-03 18:50:13,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:13,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1570485163, now seen corresponding path program 1 times [2024-06-03 18:50:13,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:13,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174007018] [2024-06-03 18:50:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:13,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:13,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:13,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:13,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174007018] [2024-06-03 18:50:13,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174007018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:13,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:13,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:50:13,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660007535] [2024-06-03 18:50:13,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:13,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:50:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:13,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:50:13,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:50:13,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:13,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 343 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:13,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:13,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:13,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:13,627 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-03 18:50:13,628 INFO L125 PetriNetUnfolderBase]: For 3564/3564 co-relation queries the response was YES. [2024-06-03 18:50:13,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5352 conditions, 1562 events. 955/1562 cut-off events. For 3564/3564 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7919 event pairs, 342 based on Foata normal form. 4/1558 useless extension candidates. Maximal degree in co-relation 5325. Up to 1371 conditions per place. [2024-06-03 18:50:13,641 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 15 changer transitions 0/89 dead transitions. [2024-06-03 18:50:13,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 89 transitions, 677 flow [2024-06-03 18:50:13,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:13,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:13,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 18:50:13,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-03 18:50:13,643 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 343 flow. Second operand 5 states and 128 transitions. [2024-06-03 18:50:13,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 89 transitions, 677 flow [2024-06-03 18:50:13,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 89 transitions, 615 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:13,652 INFO L231 Difference]: Finished difference. Result has 63 places, 70 transitions, 446 flow [2024-06-03 18:50:13,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=63, PETRI_TRANSITIONS=70} [2024-06-03 18:50:13,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-03 18:50:13,655 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 70 transitions, 446 flow [2024-06-03 18:50:13,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:13,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:13,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:13,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:50:13,656 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)] === [2024-06-03 18:50:13,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:13,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1727404290, now seen corresponding path program 1 times [2024-06-03 18:50:13,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:13,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856154757] [2024-06-03 18:50:13,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:13,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:13,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:13,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856154757] [2024-06-03 18:50:13,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856154757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:13,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:13,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:50:13,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240324389] [2024-06-03 18:50:13,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:13,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:50:13,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:13,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:50:13,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:50:13,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:13,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 70 transitions, 446 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:13,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:13,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:13,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:14,074 INFO L124 PetriNetUnfolderBase]: 966/1590 cut-off events. [2024-06-03 18:50:14,074 INFO L125 PetriNetUnfolderBase]: For 4475/4481 co-relation queries the response was YES. [2024-06-03 18:50:14,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5799 conditions, 1590 events. 966/1590 cut-off events. For 4475/4481 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8096 event pairs, 346 based on Foata normal form. 6/1588 useless extension candidates. Maximal degree in co-relation 5769. Up to 1383 conditions per place. [2024-06-03 18:50:14,087 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2024-06-03 18:50:14,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 93 transitions, 723 flow [2024-06-03 18:50:14,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:14,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:14,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 18:50:14,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:50:14,089 INFO L175 Difference]: Start difference. First operand has 63 places, 70 transitions, 446 flow. Second operand 5 states and 126 transitions. [2024-06-03 18:50:14,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 93 transitions, 723 flow [2024-06-03 18:50:14,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 93 transitions, 717 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-03 18:50:14,096 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 521 flow [2024-06-03 18:50:14,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2024-06-03 18:50:14,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 26 predicate places. [2024-06-03 18:50:14,097 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 521 flow [2024-06-03 18:50:14,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:14,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:14,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:14,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:50:14,098 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)] === [2024-06-03 18:50:14,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash -761795358, now seen corresponding path program 2 times [2024-06-03 18:50:14,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:14,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424179243] [2024-06-03 18:50:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:14,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:14,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:14,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:14,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424179243] [2024-06-03 18:50:14,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424179243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:14,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:14,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:50:14,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535260975] [2024-06-03 18:50:14,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:14,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:50:14,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:14,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:50:14,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:50:14,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:14,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 521 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:14,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:14,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:14,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:14,474 INFO L124 PetriNetUnfolderBase]: 961/1587 cut-off events. [2024-06-03 18:50:14,475 INFO L125 PetriNetUnfolderBase]: For 5423/5429 co-relation queries the response was YES. [2024-06-03 18:50:14,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6026 conditions, 1587 events. 961/1587 cut-off events. For 5423/5429 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8071 event pairs, 343 based on Foata normal form. 2/1582 useless extension candidates. Maximal degree in co-relation 5992. Up to 1378 conditions per place. [2024-06-03 18:50:14,489 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 68 selfloop transitions, 20 changer transitions 0/95 dead transitions. [2024-06-03 18:50:14,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 760 flow [2024-06-03 18:50:14,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:14,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:14,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-03 18:50:14,491 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-03 18:50:14,491 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 521 flow. Second operand 5 states and 129 transitions. [2024-06-03 18:50:14,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 760 flow [2024-06-03 18:50:14,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 741 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 18:50:14,500 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 580 flow [2024-06-03 18:50:14,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=580, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-03 18:50:14,501 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 31 predicate places. [2024-06-03 18:50:14,501 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 580 flow [2024-06-03 18:50:14,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:14,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:14,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:14,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:50:14,502 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)] === [2024-06-03 18:50:14,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:14,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1702746890, now seen corresponding path program 1 times [2024-06-03 18:50:14,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:14,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685807191] [2024-06-03 18:50:14,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:14,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:14,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:14,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685807191] [2024-06-03 18:50:14,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685807191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:14,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:14,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:14,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960108529] [2024-06-03 18:50:14,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:14,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:14,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:14,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:14,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 580 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:14,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:14,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:14,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:14,948 INFO L124 PetriNetUnfolderBase]: 970/1591 cut-off events. [2024-06-03 18:50:14,948 INFO L125 PetriNetUnfolderBase]: For 6620/6620 co-relation queries the response was YES. [2024-06-03 18:50:14,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6234 conditions, 1591 events. 970/1591 cut-off events. For 6620/6620 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8073 event pairs, 316 based on Foata normal form. 8/1591 useless extension candidates. Maximal degree in co-relation 6197. Up to 1357 conditions per place. [2024-06-03 18:50:14,963 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 70 selfloop transitions, 23 changer transitions 0/100 dead transitions. [2024-06-03 18:50:14,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 100 transitions, 834 flow [2024-06-03 18:50:14,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:14,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:14,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 18:50:14,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 18:50:14,965 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 580 flow. Second operand 6 states and 148 transitions. [2024-06-03 18:50:14,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 100 transitions, 834 flow [2024-06-03 18:50:14,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 100 transitions, 810 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-03 18:50:14,979 INFO L231 Difference]: Finished difference. Result has 78 places, 80 transitions, 634 flow [2024-06-03 18:50:14,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=634, PETRI_PLACES=78, PETRI_TRANSITIONS=80} [2024-06-03 18:50:14,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-03 18:50:14,980 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 80 transitions, 634 flow [2024-06-03 18:50:14,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:14,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:14,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:14,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:50:14,981 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)] === [2024-06-03 18:50:14,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:14,981 INFO L85 PathProgramCache]: Analyzing trace with hash -512207174, now seen corresponding path program 1 times [2024-06-03 18:50:14,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:14,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586124312] [2024-06-03 18:50:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:14,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:15,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:15,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586124312] [2024-06-03 18:50:15,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586124312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:15,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:15,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073358557] [2024-06-03 18:50:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:15,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:15,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:15,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 80 transitions, 634 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:15,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:15,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:15,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:15,415 INFO L124 PetriNetUnfolderBase]: 925/1553 cut-off events. [2024-06-03 18:50:15,416 INFO L125 PetriNetUnfolderBase]: For 8783/8816 co-relation queries the response was YES. [2024-06-03 18:50:15,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6490 conditions, 1553 events. 925/1553 cut-off events. For 8783/8816 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8064 event pairs, 286 based on Foata normal form. 33/1535 useless extension candidates. Maximal degree in co-relation 6451. Up to 1266 conditions per place. [2024-06-03 18:50:15,431 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 69 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-03 18:50:15,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 110 transitions, 944 flow [2024-06-03 18:50:15,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:15,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:15,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 18:50:15,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-03 18:50:15,433 INFO L175 Difference]: Start difference. First operand has 78 places, 80 transitions, 634 flow. Second operand 6 states and 160 transitions. [2024-06-03 18:50:15,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 110 transitions, 944 flow [2024-06-03 18:50:15,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 110 transitions, 890 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:15,445 INFO L231 Difference]: Finished difference. Result has 80 places, 83 transitions, 656 flow [2024-06-03 18:50:15,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=656, PETRI_PLACES=80, PETRI_TRANSITIONS=83} [2024-06-03 18:50:15,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-03 18:50:15,446 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 83 transitions, 656 flow [2024-06-03 18:50:15,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:15,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:15,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:15,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:50:15,447 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)] === [2024-06-03 18:50:15,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:15,448 INFO L85 PathProgramCache]: Analyzing trace with hash 727180166, now seen corresponding path program 2 times [2024-06-03 18:50:15,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:15,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681382515] [2024-06-03 18:50:15,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:15,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:15,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:15,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:15,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681382515] [2024-06-03 18:50:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681382515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:15,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:15,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:50:15,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865714697] [2024-06-03 18:50:15,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:15,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:50:15,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:15,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:50:15,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:50:15,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:15,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 83 transitions, 656 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:15,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:15,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:15,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:15,833 INFO L124 PetriNetUnfolderBase]: 934/1551 cut-off events. [2024-06-03 18:50:15,834 INFO L125 PetriNetUnfolderBase]: For 9905/9933 co-relation queries the response was YES. [2024-06-03 18:50:15,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6635 conditions, 1551 events. 934/1551 cut-off events. For 9905/9933 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8089 event pairs, 296 based on Foata normal form. 21/1513 useless extension candidates. Maximal degree in co-relation 6595. Up to 1283 conditions per place. [2024-06-03 18:50:15,848 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 57 selfloop transitions, 26 changer transitions 0/98 dead transitions. [2024-06-03 18:50:15,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 98 transitions, 860 flow [2024-06-03 18:50:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:15,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:15,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 18:50:15,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 18:50:15,849 INFO L175 Difference]: Start difference. First operand has 80 places, 83 transitions, 656 flow. Second operand 5 states and 130 transitions. [2024-06-03 18:50:15,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 98 transitions, 860 flow [2024-06-03 18:50:15,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 804 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:15,863 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 661 flow [2024-06-03 18:50:15,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=661, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-06-03 18:50:15,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-03 18:50:15,864 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 661 flow [2024-06-03 18:50:15,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:15,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:15,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:15,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:50:15,865 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)] === [2024-06-03 18:50:15,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:15,865 INFO L85 PathProgramCache]: Analyzing trace with hash 433892943, now seen corresponding path program 1 times [2024-06-03 18:50:15,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:15,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202610354] [2024-06-03 18:50:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:15,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:15,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:16,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:16,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:16,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202610354] [2024-06-03 18:50:16,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202610354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:16,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:16,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:16,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899540136] [2024-06-03 18:50:16,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:16,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:16,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:16,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:16,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:16,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:16,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 661 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:16,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:16,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:16,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:16,345 INFO L124 PetriNetUnfolderBase]: 1005/1661 cut-off events. [2024-06-03 18:50:16,346 INFO L125 PetriNetUnfolderBase]: For 10378/10384 co-relation queries the response was YES. [2024-06-03 18:50:16,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6980 conditions, 1661 events. 1005/1661 cut-off events. For 10378/10384 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8502 event pairs, 317 based on Foata normal form. 2/1656 useless extension candidates. Maximal degree in co-relation 6939. Up to 1356 conditions per place. [2024-06-03 18:50:16,363 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 94 selfloop transitions, 32 changer transitions 0/133 dead transitions. [2024-06-03 18:50:16,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 133 transitions, 1185 flow [2024-06-03 18:50:16,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:16,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:16,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 18:50:16,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 18:50:16,365 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 661 flow. Second operand 7 states and 181 transitions. [2024-06-03 18:50:16,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 133 transitions, 1185 flow [2024-06-03 18:50:16,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 133 transitions, 1104 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:16,384 INFO L231 Difference]: Finished difference. Result has 87 places, 98 transitions, 785 flow [2024-06-03 18:50:16,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=596, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=785, PETRI_PLACES=87, PETRI_TRANSITIONS=98} [2024-06-03 18:50:16,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-03 18:50:16,386 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 98 transitions, 785 flow [2024-06-03 18:50:16,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:16,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:16,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:16,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:50:16,387 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)] === [2024-06-03 18:50:16,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:16,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1067956841, now seen corresponding path program 2 times [2024-06-03 18:50:16,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:16,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493122000] [2024-06-03 18:50:16,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:16,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:16,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:16,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:16,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493122000] [2024-06-03 18:50:16,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493122000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:16,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:16,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:16,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857270893] [2024-06-03 18:50:16,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:16,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:16,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:16,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:16,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:16,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:16,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 98 transitions, 785 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:16,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:16,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:16,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:16,835 INFO L124 PetriNetUnfolderBase]: 1016/1663 cut-off events. [2024-06-03 18:50:16,835 INFO L125 PetriNetUnfolderBase]: For 12195/12195 co-relation queries the response was YES. [2024-06-03 18:50:16,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7519 conditions, 1663 events. 1016/1663 cut-off events. For 12195/12195 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8484 event pairs, 327 based on Foata normal form. 2/1652 useless extension candidates. Maximal degree in co-relation 7475. Up to 1368 conditions per place. [2024-06-03 18:50:16,852 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 36 changer transitions 0/127 dead transitions. [2024-06-03 18:50:16,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 127 transitions, 1219 flow [2024-06-03 18:50:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:16,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 18:50:16,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-03 18:50:16,854 INFO L175 Difference]: Start difference. First operand has 87 places, 98 transitions, 785 flow. Second operand 6 states and 154 transitions. [2024-06-03 18:50:16,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 127 transitions, 1219 flow [2024-06-03 18:50:16,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 127 transitions, 1191 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 18:50:16,877 INFO L231 Difference]: Finished difference. Result has 93 places, 103 transitions, 888 flow [2024-06-03 18:50:16,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=757, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=888, PETRI_PLACES=93, PETRI_TRANSITIONS=103} [2024-06-03 18:50:16,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-03 18:50:16,878 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 103 transitions, 888 flow [2024-06-03 18:50:16,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:16,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:16,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:16,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:50:16,879 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)] === [2024-06-03 18:50:16,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2100041855, now seen corresponding path program 3 times [2024-06-03 18:50:16,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:16,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016471717] [2024-06-03 18:50:16,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:16,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:17,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:17,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:17,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016471717] [2024-06-03 18:50:17,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016471717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:17,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:17,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:17,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865881701] [2024-06-03 18:50:17,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:17,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:17,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:17,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:17,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:17,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:17,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 103 transitions, 888 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:17,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:17,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:17,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:17,341 INFO L124 PetriNetUnfolderBase]: 1011/1656 cut-off events. [2024-06-03 18:50:17,341 INFO L125 PetriNetUnfolderBase]: For 13743/13743 co-relation queries the response was YES. [2024-06-03 18:50:17,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7765 conditions, 1656 events. 1011/1656 cut-off events. For 13743/13743 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8468 event pairs, 327 based on Foata normal form. 2/1645 useless extension candidates. Maximal degree in co-relation 7717. Up to 1363 conditions per place. [2024-06-03 18:50:17,357 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 83 selfloop transitions, 35 changer transitions 0/125 dead transitions. [2024-06-03 18:50:17,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 125 transitions, 1233 flow [2024-06-03 18:50:17,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:17,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:17,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 18:50:17,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-03 18:50:17,359 INFO L175 Difference]: Start difference. First operand has 93 places, 103 transitions, 888 flow. Second operand 6 states and 152 transitions. [2024-06-03 18:50:17,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 125 transitions, 1233 flow [2024-06-03 18:50:17,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 125 transitions, 1176 flow, removed 7 selfloop flow, removed 2 redundant places. [2024-06-03 18:50:17,382 INFO L231 Difference]: Finished difference. Result has 97 places, 103 transitions, 909 flow [2024-06-03 18:50:17,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=909, PETRI_PLACES=97, PETRI_TRANSITIONS=103} [2024-06-03 18:50:17,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-03 18:50:17,383 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 103 transitions, 909 flow [2024-06-03 18:50:17,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:17,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:17,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:17,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:50:17,384 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:17,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:17,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1484241943, now seen corresponding path program 4 times [2024-06-03 18:50:17,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:17,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666187452] [2024-06-03 18:50:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:17,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:17,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:17,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:17,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666187452] [2024-06-03 18:50:17,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666187452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:17,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:17,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:17,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049361002] [2024-06-03 18:50:17,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:17,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:17,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:17,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:17,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:17,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:17,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 103 transitions, 909 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:17,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:17,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:17,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:17,870 INFO L124 PetriNetUnfolderBase]: 1022/1697 cut-off events. [2024-06-03 18:50:17,870 INFO L125 PetriNetUnfolderBase]: For 15762/15768 co-relation queries the response was YES. [2024-06-03 18:50:17,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8004 conditions, 1697 events. 1022/1697 cut-off events. For 15762/15768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 8779 event pairs, 329 based on Foata normal form. 2/1691 useless extension candidates. Maximal degree in co-relation 7955. Up to 1375 conditions per place. [2024-06-03 18:50:17,887 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 39 changer transitions 0/134 dead transitions. [2024-06-03 18:50:17,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 134 transitions, 1317 flow [2024-06-03 18:50:17,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:17,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-03 18:50:17,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-03 18:50:17,889 INFO L175 Difference]: Start difference. First operand has 97 places, 103 transitions, 909 flow. Second operand 6 states and 158 transitions. [2024-06-03 18:50:17,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 134 transitions, 1317 flow [2024-06-03 18:50:17,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 134 transitions, 1217 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:17,918 INFO L231 Difference]: Finished difference. Result has 99 places, 107 transitions, 936 flow [2024-06-03 18:50:17,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=936, PETRI_PLACES=99, PETRI_TRANSITIONS=107} [2024-06-03 18:50:17,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-03 18:50:17,920 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 107 transitions, 936 flow [2024-06-03 18:50:17,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:17,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:17,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:17,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:50:17,921 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)] === [2024-06-03 18:50:17,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash -52293399, now seen corresponding path program 5 times [2024-06-03 18:50:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367458121] [2024-06-03 18:50:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:18,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:18,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:18,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367458121] [2024-06-03 18:50:18,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367458121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:18,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:18,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:18,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885279608] [2024-06-03 18:50:18,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:18,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:18,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:18,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:18,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:18,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:18,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 107 transitions, 936 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:18,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:18,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:18,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:18,408 INFO L124 PetriNetUnfolderBase]: 1033/1708 cut-off events. [2024-06-03 18:50:18,408 INFO L125 PetriNetUnfolderBase]: For 17704/17710 co-relation queries the response was YES. [2024-06-03 18:50:18,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8261 conditions, 1708 events. 1033/1708 cut-off events. For 17704/17710 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8865 event pairs, 331 based on Foata normal form. 6/1702 useless extension candidates. Maximal degree in co-relation 8211. Up to 1387 conditions per place. [2024-06-03 18:50:18,425 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 84 selfloop transitions, 41 changer transitions 0/132 dead transitions. [2024-06-03 18:50:18,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 132 transitions, 1336 flow [2024-06-03 18:50:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:18,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 18:50:18,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 18:50:18,427 INFO L175 Difference]: Start difference. First operand has 99 places, 107 transitions, 936 flow. Second operand 6 states and 149 transitions. [2024-06-03 18:50:18,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 132 transitions, 1336 flow [2024-06-03 18:50:18,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 132 transitions, 1248 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:18,457 INFO L231 Difference]: Finished difference. Result has 101 places, 111 transitions, 976 flow [2024-06-03 18:50:18,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=976, PETRI_PLACES=101, PETRI_TRANSITIONS=111} [2024-06-03 18:50:18,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-03 18:50:18,459 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 111 transitions, 976 flow [2024-06-03 18:50:18,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:18,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:18,459 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:18,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:50:18,460 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)] === [2024-06-03 18:50:18,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:18,460 INFO L85 PathProgramCache]: Analyzing trace with hash -308793909, now seen corresponding path program 6 times [2024-06-03 18:50:18,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:18,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37905351] [2024-06-03 18:50:18,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:18,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:18,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:18,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:18,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:18,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37905351] [2024-06-03 18:50:18,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37905351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:18,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:18,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:18,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036491320] [2024-06-03 18:50:18,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:18,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:18,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:18,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:18,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:18,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:18,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 111 transitions, 976 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:18,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:18,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:18,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:18,923 INFO L124 PetriNetUnfolderBase]: 1028/1711 cut-off events. [2024-06-03 18:50:18,923 INFO L125 PetriNetUnfolderBase]: For 18813/18819 co-relation queries the response was YES. [2024-06-03 18:50:18,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8314 conditions, 1711 events. 1028/1711 cut-off events. For 18813/18819 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 8837 event pairs, 329 based on Foata normal form. 2/1705 useless extension candidates. Maximal degree in co-relation 8263. Up to 1382 conditions per place. [2024-06-03 18:50:18,938 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 84 selfloop transitions, 42 changer transitions 0/133 dead transitions. [2024-06-03 18:50:18,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1284 flow [2024-06-03 18:50:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-03 18:50:18,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-03 18:50:18,940 INFO L175 Difference]: Start difference. First operand has 101 places, 111 transitions, 976 flow. Second operand 6 states and 153 transitions. [2024-06-03 18:50:18,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1284 flow [2024-06-03 18:50:18,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 133 transitions, 1236 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-03 18:50:18,975 INFO L231 Difference]: Finished difference. Result has 105 places, 111 transitions, 1020 flow [2024-06-03 18:50:18,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=105, PETRI_TRANSITIONS=111} [2024-06-03 18:50:18,976 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-03 18:50:18,976 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 111 transitions, 1020 flow [2024-06-03 18:50:18,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:18,976 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:18,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:18,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:50:18,977 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)] === [2024-06-03 18:50:18,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:18,977 INFO L85 PathProgramCache]: Analyzing trace with hash -52285463, now seen corresponding path program 1 times [2024-06-03 18:50:18,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:18,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943465888] [2024-06-03 18:50:18,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:18,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:18,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:19,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:19,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943465888] [2024-06-03 18:50:19,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943465888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:19,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:19,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:19,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216228191] [2024-06-03 18:50:19,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:19,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:19,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:19,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:19,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:19,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:19,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 111 transitions, 1020 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:19,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:19,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:19,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:19,456 INFO L124 PetriNetUnfolderBase]: 1045/1738 cut-off events. [2024-06-03 18:50:19,457 INFO L125 PetriNetUnfolderBase]: For 21715/21721 co-relation queries the response was YES. [2024-06-03 18:50:19,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8563 conditions, 1738 events. 1045/1738 cut-off events. For 21715/21721 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9056 event pairs, 317 based on Foata normal form. 8/1738 useless extension candidates. Maximal degree in co-relation 8510. Up to 1487 conditions per place. [2024-06-03 18:50:19,475 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 106 selfloop transitions, 20 changer transitions 0/133 dead transitions. [2024-06-03 18:50:19,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 133 transitions, 1338 flow [2024-06-03 18:50:19,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:19,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:19,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 18:50:19,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 18:50:19,477 INFO L175 Difference]: Start difference. First operand has 105 places, 111 transitions, 1020 flow. Second operand 6 states and 145 transitions. [2024-06-03 18:50:19,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 133 transitions, 1338 flow [2024-06-03 18:50:19,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 133 transitions, 1248 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:19,517 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 997 flow [2024-06-03 18:50:19,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=930, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=997, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2024-06-03 18:50:19,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-03 18:50:19,518 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 997 flow [2024-06-03 18:50:19,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:19,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:19,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:19,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:50:19,519 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)] === [2024-06-03 18:50:19,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:19,519 INFO L85 PathProgramCache]: Analyzing trace with hash -42762263, now seen corresponding path program 2 times [2024-06-03 18:50:19,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:19,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585297496] [2024-06-03 18:50:19,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:19,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:19,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:19,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:19,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585297496] [2024-06-03 18:50:19,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585297496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:19,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:19,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646463780] [2024-06-03 18:50:19,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:19,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:19,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:19,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:19,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 997 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:19,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:19,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:19,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:20,008 INFO L124 PetriNetUnfolderBase]: 1062/1764 cut-off events. [2024-06-03 18:50:20,008 INFO L125 PetriNetUnfolderBase]: For 24140/24146 co-relation queries the response was YES. [2024-06-03 18:50:20,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8832 conditions, 1764 events. 1062/1764 cut-off events. For 24140/24146 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9231 event pairs, 288 based on Foata normal form. 8/1764 useless extension candidates. Maximal degree in co-relation 8778. Up to 1431 conditions per place. [2024-06-03 18:50:20,028 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 107 selfloop transitions, 26 changer transitions 0/140 dead transitions. [2024-06-03 18:50:20,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 140 transitions, 1431 flow [2024-06-03 18:50:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:20,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:20,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 18:50:20,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 18:50:20,030 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 997 flow. Second operand 6 states and 148 transitions. [2024-06-03 18:50:20,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 140 transitions, 1431 flow [2024-06-03 18:50:20,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 140 transitions, 1382 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:20,068 INFO L231 Difference]: Finished difference. Result has 109 places, 117 transitions, 1051 flow [2024-06-03 18:50:20,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=948, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1051, PETRI_PLACES=109, PETRI_TRANSITIONS=117} [2024-06-03 18:50:20,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-03 18:50:20,069 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 117 transitions, 1051 flow [2024-06-03 18:50:20,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:20,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:20,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:20,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:50:20,070 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)] === [2024-06-03 18:50:20,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:20,070 INFO L85 PathProgramCache]: Analyzing trace with hash -308785973, now seen corresponding path program 3 times [2024-06-03 18:50:20,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:20,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588727226] [2024-06-03 18:50:20,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:20,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:20,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:20,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:20,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:20,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588727226] [2024-06-03 18:50:20,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588727226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:20,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:20,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:20,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638785285] [2024-06-03 18:50:20,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:20,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:20,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:20,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:20,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:20,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 117 transitions, 1051 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:20,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:20,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:20,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:20,516 INFO L124 PetriNetUnfolderBase]: 1054/1757 cut-off events. [2024-06-03 18:50:20,516 INFO L125 PetriNetUnfolderBase]: For 25518/25524 co-relation queries the response was YES. [2024-06-03 18:50:20,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8949 conditions, 1757 events. 1054/1757 cut-off events. For 25518/25524 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 9167 event pairs, 312 based on Foata normal form. 4/1754 useless extension candidates. Maximal degree in co-relation 8894. Up to 1502 conditions per place. [2024-06-03 18:50:20,534 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 111 selfloop transitions, 22 changer transitions 0/140 dead transitions. [2024-06-03 18:50:20,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 140 transitions, 1375 flow [2024-06-03 18:50:20,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:20,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:20,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 18:50:20,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 18:50:20,536 INFO L175 Difference]: Start difference. First operand has 109 places, 117 transitions, 1051 flow. Second operand 6 states and 150 transitions. [2024-06-03 18:50:20,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 140 transitions, 1375 flow [2024-06-03 18:50:20,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 140 transitions, 1332 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-03 18:50:20,583 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 1059 flow [2024-06-03 18:50:20,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1059, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-06-03 18:50:20,583 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 70 predicate places. [2024-06-03 18:50:20,584 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 1059 flow [2024-06-03 18:50:20,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:20,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:20,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:20,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:50:20,584 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)] === [2024-06-03 18:50:20,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:20,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1791327585, now seen corresponding path program 1 times [2024-06-03 18:50:20,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:20,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866971771] [2024-06-03 18:50:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:20,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:20,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:20,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866971771] [2024-06-03 18:50:20,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866971771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:20,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:20,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:20,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168771554] [2024-06-03 18:50:20,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:20,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:20,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:20,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:20,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:20,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:20,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 1059 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:20,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:20,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:20,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:21,145 INFO L124 PetriNetUnfolderBase]: 1055/1778 cut-off events. [2024-06-03 18:50:21,145 INFO L125 PetriNetUnfolderBase]: For 31076/31098 co-relation queries the response was YES. [2024-06-03 18:50:21,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9364 conditions, 1778 events. 1055/1778 cut-off events. For 31076/31098 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9521 event pairs, 183 based on Foata normal form. 10/1730 useless extension candidates. Maximal degree in co-relation 9307. Up to 1341 conditions per place. [2024-06-03 18:50:21,164 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 40 changer transitions 0/158 dead transitions. [2024-06-03 18:50:21,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 158 transitions, 1525 flow [2024-06-03 18:50:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:50:21,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:50:21,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-03 18:50:21,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-03 18:50:21,167 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 1059 flow. Second operand 8 states and 205 transitions. [2024-06-03 18:50:21,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 158 transitions, 1525 flow [2024-06-03 18:50:21,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 1476 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:21,222 INFO L231 Difference]: Finished difference. Result has 117 places, 121 transitions, 1133 flow [2024-06-03 18:50:21,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1133, PETRI_PLACES=117, PETRI_TRANSITIONS=121} [2024-06-03 18:50:21,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-03 18:50:21,223 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 121 transitions, 1133 flow [2024-06-03 18:50:21,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:21,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:21,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:21,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:50:21,223 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)] === [2024-06-03 18:50:21,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:21,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1794184545, now seen corresponding path program 2 times [2024-06-03 18:50:21,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:21,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027308160] [2024-06-03 18:50:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:21,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:21,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:21,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:21,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027308160] [2024-06-03 18:50:21,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027308160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:21,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:21,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:21,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56033478] [2024-06-03 18:50:21,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:21,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:21,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:21,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:21,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:21,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:21,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 121 transitions, 1133 flow. Second operand has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:21,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:21,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:21,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:21,780 INFO L124 PetriNetUnfolderBase]: 1043/1758 cut-off events. [2024-06-03 18:50:21,781 INFO L125 PetriNetUnfolderBase]: For 33127/33154 co-relation queries the response was YES. [2024-06-03 18:50:21,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9503 conditions, 1758 events. 1043/1758 cut-off events. For 33127/33154 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 9421 event pairs, 250 based on Foata normal form. 8/1707 useless extension candidates. Maximal degree in co-relation 9445. Up to 1409 conditions per place. [2024-06-03 18:50:21,797 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 35 changer transitions 0/151 dead transitions. [2024-06-03 18:50:21,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 151 transitions, 1457 flow [2024-06-03 18:50:21,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:21,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 18:50:21,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-03 18:50:21,799 INFO L175 Difference]: Start difference. First operand has 117 places, 121 transitions, 1133 flow. Second operand 7 states and 180 transitions. [2024-06-03 18:50:21,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 151 transitions, 1457 flow [2024-06-03 18:50:21,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 151 transitions, 1394 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:21,859 INFO L231 Difference]: Finished difference. Result has 120 places, 121 transitions, 1148 flow [2024-06-03 18:50:21,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1070, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1148, PETRI_PLACES=120, PETRI_TRANSITIONS=121} [2024-06-03 18:50:21,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-03 18:50:21,860 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 121 transitions, 1148 flow [2024-06-03 18:50:21,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.857142857142858) internal successors, (118), 7 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:21,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:21,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:21,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:50:21,860 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)] === [2024-06-03 18:50:21,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:21,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1545242789, now seen corresponding path program 3 times [2024-06-03 18:50:21,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:21,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604339471] [2024-06-03 18:50:21,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:21,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:21,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:22,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:22,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604339471] [2024-06-03 18:50:22,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604339471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:22,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:22,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:22,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526353326] [2024-06-03 18:50:22,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:22,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:22,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:22,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:22,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:22,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 121 transitions, 1148 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) [2024-06-03 18:50:22,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:22,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:22,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:22,313 INFO L124 PetriNetUnfolderBase]: 1035/1730 cut-off events. [2024-06-03 18:50:22,313 INFO L125 PetriNetUnfolderBase]: For 34715/34736 co-relation queries the response was YES. [2024-06-03 18:50:22,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9496 conditions, 1730 events. 1035/1730 cut-off events. For 34715/34736 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9217 event pairs, 255 based on Foata normal form. 6/1667 useless extension candidates. Maximal degree in co-relation 9436. Up to 1397 conditions per place. [2024-06-03 18:50:22,366 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 81 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-03 18:50:22,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 143 transitions, 1450 flow [2024-06-03 18:50:22,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:22,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:22,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 18:50:22,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-03 18:50:22,369 INFO L175 Difference]: Start difference. First operand has 120 places, 121 transitions, 1148 flow. Second operand 6 states and 152 transitions. [2024-06-03 18:50:22,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 143 transitions, 1450 flow [2024-06-03 18:50:22,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 143 transitions, 1371 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:50:22,419 INFO L231 Difference]: Finished difference. Result has 120 places, 123 transitions, 1171 flow [2024-06-03 18:50:22,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1069, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1171, PETRI_PLACES=120, PETRI_TRANSITIONS=123} [2024-06-03 18:50:22,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-03 18:50:22,420 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 123 transitions, 1171 flow [2024-06-03 18:50:22,421 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) [2024-06-03 18:50:22,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:22,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:22,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:50:22,422 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:22,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:22,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1063539590, now seen corresponding path program 1 times [2024-06-03 18:50:22,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:22,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889294593] [2024-06-03 18:50:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:22,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:22,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:22,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:22,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889294593] [2024-06-03 18:50:22,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889294593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:22,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:22,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:22,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445431808] [2024-06-03 18:50:22,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:22,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:22,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:22,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:22,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 1171 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:22,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:22,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:22,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:22,894 INFO L124 PetriNetUnfolderBase]: 1119/1867 cut-off events. [2024-06-03 18:50:22,894 INFO L125 PetriNetUnfolderBase]: For 33849/33855 co-relation queries the response was YES. [2024-06-03 18:50:22,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10083 conditions, 1867 events. 1119/1867 cut-off events. For 33849/33855 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 9842 event pairs, 280 based on Foata normal form. 6/1868 useless extension candidates. Maximal degree in co-relation 10022. Up to 1590 conditions per place. [2024-06-03 18:50:22,914 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 34 changer transitions 0/157 dead transitions. [2024-06-03 18:50:22,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 157 transitions, 1770 flow [2024-06-03 18:50:22,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:22,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 18:50:22,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 18:50:22,916 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 1171 flow. Second operand 6 states and 149 transitions. [2024-06-03 18:50:22,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 157 transitions, 1770 flow [2024-06-03 18:50:22,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 157 transitions, 1682 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:22,972 INFO L231 Difference]: Finished difference. Result has 124 places, 139 transitions, 1358 flow [2024-06-03 18:50:22,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1089, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1358, PETRI_PLACES=124, PETRI_TRANSITIONS=139} [2024-06-03 18:50:22,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-03 18:50:22,974 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 139 transitions, 1358 flow [2024-06-03 18:50:22,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:22,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:22,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:22,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:50:22,974 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:22,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:22,975 INFO L85 PathProgramCache]: Analyzing trace with hash -535610012, now seen corresponding path program 2 times [2024-06-03 18:50:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:22,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54394951] [2024-06-03 18:50:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:22,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:23,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:23,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54394951] [2024-06-03 18:50:23,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54394951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:23,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:23,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:23,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326543028] [2024-06-03 18:50:23,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:23,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:23,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:23,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:23,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:23,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:23,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 139 transitions, 1358 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:23,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:23,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:23,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:23,514 INFO L124 PetriNetUnfolderBase]: 1147/1909 cut-off events. [2024-06-03 18:50:23,514 INFO L125 PetriNetUnfolderBase]: For 36865/36865 co-relation queries the response was YES. [2024-06-03 18:50:23,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10725 conditions, 1909 events. 1147/1909 cut-off events. For 36865/36865 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10048 event pairs, 270 based on Foata normal form. 2/1908 useless extension candidates. Maximal degree in co-relation 10661. Up to 1648 conditions per place. [2024-06-03 18:50:23,532 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 34 changer transitions 0/166 dead transitions. [2024-06-03 18:50:23,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 166 transitions, 1869 flow [2024-06-03 18:50:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:23,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-03 18:50:23,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-03 18:50:23,533 INFO L175 Difference]: Start difference. First operand has 124 places, 139 transitions, 1358 flow. Second operand 5 states and 132 transitions. [2024-06-03 18:50:23,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 166 transitions, 1869 flow [2024-06-03 18:50:23,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 166 transitions, 1831 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-03 18:50:23,592 INFO L231 Difference]: Finished difference. Result has 130 places, 147 transitions, 1542 flow [2024-06-03 18:50:23,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1320, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1542, PETRI_PLACES=130, PETRI_TRANSITIONS=147} [2024-06-03 18:50:23,593 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-03 18:50:23,593 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 147 transitions, 1542 flow [2024-06-03 18:50:23,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:23,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:23,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:23,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:50:23,594 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:23,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:23,594 INFO L85 PathProgramCache]: Analyzing trace with hash -503881202, now seen corresponding path program 3 times [2024-06-03 18:50:23,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:23,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710392687] [2024-06-03 18:50:23,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:23,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:23,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:23,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:23,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710392687] [2024-06-03 18:50:23,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710392687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:23,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:23,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:23,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219249005] [2024-06-03 18:50:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:23,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:23,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:23,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:23,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:23,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:23,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 147 transitions, 1542 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:23,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:23,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:23,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:24,066 INFO L124 PetriNetUnfolderBase]: 1149/1917 cut-off events. [2024-06-03 18:50:24,066 INFO L125 PetriNetUnfolderBase]: For 40292/40298 co-relation queries the response was YES. [2024-06-03 18:50:24,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11018 conditions, 1917 events. 1149/1917 cut-off events. For 40292/40298 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 10154 event pairs, 282 based on Foata normal form. 6/1918 useless extension candidates. Maximal degree in co-relation 10950. Up to 1622 conditions per place. [2024-06-03 18:50:24,089 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 115 selfloop transitions, 45 changer transitions 0/167 dead transitions. [2024-06-03 18:50:24,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 167 transitions, 2044 flow [2024-06-03 18:50:24,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:24,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:24,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-03 18:50:24,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 18:50:24,091 INFO L175 Difference]: Start difference. First operand has 130 places, 147 transitions, 1542 flow. Second operand 5 states and 130 transitions. [2024-06-03 18:50:24,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 167 transitions, 2044 flow [2024-06-03 18:50:24,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 167 transitions, 1999 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 18:50:24,187 INFO L231 Difference]: Finished difference. Result has 133 places, 150 transitions, 1639 flow [2024-06-03 18:50:24,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1497, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1639, PETRI_PLACES=133, PETRI_TRANSITIONS=150} [2024-06-03 18:50:24,188 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-03 18:50:24,188 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 150 transitions, 1639 flow [2024-06-03 18:50:24,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:24,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:24,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:24,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:50:24,189 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:24,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:24,189 INFO L85 PathProgramCache]: Analyzing trace with hash 236855980, now seen corresponding path program 1 times [2024-06-03 18:50:24,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:24,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549378484] [2024-06-03 18:50:24,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:24,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:24,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549378484] [2024-06-03 18:50:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549378484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:24,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803567374] [2024-06-03 18:50:24,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:24,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:24,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:24,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:24,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:24,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 150 transitions, 1639 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:24,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:24,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:24,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:24,674 INFO L124 PetriNetUnfolderBase]: 1167/1944 cut-off events. [2024-06-03 18:50:24,674 INFO L125 PetriNetUnfolderBase]: For 44384/44384 co-relation queries the response was YES. [2024-06-03 18:50:24,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11360 conditions, 1944 events. 1167/1944 cut-off events. For 44384/44384 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10349 event pairs, 292 based on Foata normal form. 2/1938 useless extension candidates. Maximal degree in co-relation 11291. Up to 1629 conditions per place. [2024-06-03 18:50:24,697 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 134 selfloop transitions, 38 changer transitions 0/179 dead transitions. [2024-06-03 18:50:24,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 179 transitions, 2247 flow [2024-06-03 18:50:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:24,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:24,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 18:50:24,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 18:50:24,698 INFO L175 Difference]: Start difference. First operand has 133 places, 150 transitions, 1639 flow. Second operand 6 states and 149 transitions. [2024-06-03 18:50:24,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 179 transitions, 2247 flow [2024-06-03 18:50:24,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 179 transitions, 2143 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:24,786 INFO L231 Difference]: Finished difference. Result has 136 places, 161 transitions, 1746 flow [2024-06-03 18:50:24,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1746, PETRI_PLACES=136, PETRI_TRANSITIONS=161} [2024-06-03 18:50:24,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-03 18:50:24,787 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 161 transitions, 1746 flow [2024-06-03 18:50:24,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:24,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:24,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:24,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:50:24,787 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:24,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:24,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432248, now seen corresponding path program 1 times [2024-06-03 18:50:24,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:24,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166589395] [2024-06-03 18:50:24,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:24,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166589395] [2024-06-03 18:50:24,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166589395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:24,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:24,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:24,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024215233] [2024-06-03 18:50:24,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:24,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:24,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:24,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:24,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:24,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 161 transitions, 1746 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:24,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:24,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:24,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:25,259 INFO L124 PetriNetUnfolderBase]: 1187/1976 cut-off events. [2024-06-03 18:50:25,260 INFO L125 PetriNetUnfolderBase]: For 45402/45402 co-relation queries the response was YES. [2024-06-03 18:50:25,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11773 conditions, 1976 events. 1187/1976 cut-off events. For 45402/45402 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10486 event pairs, 288 based on Foata normal form. 2/1971 useless extension candidates. Maximal degree in co-relation 11704. Up to 1663 conditions per place. [2024-06-03 18:50:25,283 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 125 selfloop transitions, 52 changer transitions 0/184 dead transitions. [2024-06-03 18:50:25,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 184 transitions, 2370 flow [2024-06-03 18:50:25,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:25,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 18:50:25,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 18:50:25,285 INFO L175 Difference]: Start difference. First operand has 136 places, 161 transitions, 1746 flow. Second operand 6 states and 146 transitions. [2024-06-03 18:50:25,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 184 transitions, 2370 flow [2024-06-03 18:50:25,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 184 transitions, 2308 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-06-03 18:50:25,389 INFO L231 Difference]: Finished difference. Result has 142 places, 169 transitions, 1932 flow [2024-06-03 18:50:25,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1688, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1932, PETRI_PLACES=142, PETRI_TRANSITIONS=169} [2024-06-03 18:50:25,393 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-03 18:50:25,394 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 169 transitions, 1932 flow [2024-06-03 18:50:25,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:25,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:25,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:25,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:50:25,394 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:25,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1233432434, now seen corresponding path program 2 times [2024-06-03 18:50:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:25,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282330749] [2024-06-03 18:50:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:25,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:25,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:25,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282330749] [2024-06-03 18:50:25,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282330749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:25,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:25,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:25,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13107518] [2024-06-03 18:50:25,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:25,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:25,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:25,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:25,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:25,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:25,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 169 transitions, 1932 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:25,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:25,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:25,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:25,901 INFO L124 PetriNetUnfolderBase]: 1197/1997 cut-off events. [2024-06-03 18:50:25,901 INFO L125 PetriNetUnfolderBase]: For 48702/48702 co-relation queries the response was YES. [2024-06-03 18:50:25,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12081 conditions, 1997 events. 1197/1997 cut-off events. For 48702/48702 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10684 event pairs, 280 based on Foata normal form. 2/1992 useless extension candidates. Maximal degree in co-relation 12008. Up to 1726 conditions per place. [2024-06-03 18:50:25,929 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 148 selfloop transitions, 31 changer transitions 0/186 dead transitions. [2024-06-03 18:50:25,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 2360 flow [2024-06-03 18:50:25,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:25,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:25,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 18:50:25,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 18:50:25,930 INFO L175 Difference]: Start difference. First operand has 142 places, 169 transitions, 1932 flow. Second operand 6 states and 142 transitions. [2024-06-03 18:50:25,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 2360 flow [2024-06-03 18:50:26,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 186 transitions, 2214 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:26,034 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1901 flow [2024-06-03 18:50:26,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1786, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1901, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-03 18:50:26,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 18:50:26,035 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1901 flow [2024-06-03 18:50:26,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:26,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:26,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:26,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:50:26,036 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)] === [2024-06-03 18:50:26,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:26,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1739189820, now seen corresponding path program 2 times [2024-06-03 18:50:26,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:26,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496554753] [2024-06-03 18:50:26,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:26,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:26,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:26,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:26,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:26,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496554753] [2024-06-03 18:50:26,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496554753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:26,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:26,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:26,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247190742] [2024-06-03 18:50:26,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:26,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:26,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:26,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:26,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:26,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:26,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1901 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:26,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:26,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:26,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:26,535 INFO L124 PetriNetUnfolderBase]: 1189/1992 cut-off events. [2024-06-03 18:50:26,535 INFO L125 PetriNetUnfolderBase]: For 49075/49075 co-relation queries the response was YES. [2024-06-03 18:50:26,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11967 conditions, 1992 events. 1189/1992 cut-off events. For 49075/49075 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10631 event pairs, 266 based on Foata normal form. 2/1991 useless extension candidates. Maximal degree in co-relation 11894. Up to 1706 conditions per place. [2024-06-03 18:50:26,550 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 146 selfloop transitions, 38 changer transitions 0/191 dead transitions. [2024-06-03 18:50:26,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 191 transitions, 2315 flow [2024-06-03 18:50:26,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:26,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-03 18:50:26,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6238095238095238 [2024-06-03 18:50:26,552 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1901 flow. Second operand 5 states and 131 transitions. [2024-06-03 18:50:26,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 191 transitions, 2315 flow [2024-06-03 18:50:26,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 191 transitions, 2210 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:26,665 INFO L231 Difference]: Finished difference. Result has 145 places, 173 transitions, 1896 flow [2024-06-03 18:50:26,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1796, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1896, PETRI_PLACES=145, PETRI_TRANSITIONS=173} [2024-06-03 18:50:26,665 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-03 18:50:26,665 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 173 transitions, 1896 flow [2024-06-03 18:50:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:26,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:26,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:26,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:50:26,666 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)] === [2024-06-03 18:50:26,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:26,667 INFO L85 PathProgramCache]: Analyzing trace with hash -497410014, now seen corresponding path program 3 times [2024-06-03 18:50:26,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:26,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161181262] [2024-06-03 18:50:26,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:26,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:26,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:26,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161181262] [2024-06-03 18:50:26,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161181262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:26,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:26,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:26,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550515370] [2024-06-03 18:50:26,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:26,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:26,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:26,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:26,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:26,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:26,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 173 transitions, 1896 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:26,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:26,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:26,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:27,118 INFO L124 PetriNetUnfolderBase]: 1191/1988 cut-off events. [2024-06-03 18:50:27,119 INFO L125 PetriNetUnfolderBase]: For 52884/52884 co-relation queries the response was YES. [2024-06-03 18:50:27,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12070 conditions, 1988 events. 1191/1988 cut-off events. For 52884/52884 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10657 event pairs, 280 based on Foata normal form. 2/1983 useless extension candidates. Maximal degree in co-relation 11997. Up to 1666 conditions per place. [2024-06-03 18:50:27,133 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 142 selfloop transitions, 47 changer transitions 0/196 dead transitions. [2024-06-03 18:50:27,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 196 transitions, 2420 flow [2024-06-03 18:50:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:27,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:27,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 18:50:27,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 18:50:27,135 INFO L175 Difference]: Start difference. First operand has 145 places, 173 transitions, 1896 flow. Second operand 6 states and 150 transitions. [2024-06-03 18:50:27,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 196 transitions, 2420 flow [2024-06-03 18:50:27,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 196 transitions, 2332 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:27,208 INFO L231 Difference]: Finished difference. Result has 148 places, 176 transitions, 1978 flow [2024-06-03 18:50:27,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1808, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1978, PETRI_PLACES=148, PETRI_TRANSITIONS=176} [2024-06-03 18:50:27,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-03 18:50:27,209 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 176 transitions, 1978 flow [2024-06-03 18:50:27,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:27,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:27,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:27,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:50:27,210 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)] === [2024-06-03 18:50:27,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:27,210 INFO L85 PathProgramCache]: Analyzing trace with hash -535840218, now seen corresponding path program 3 times [2024-06-03 18:50:27,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:27,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916471803] [2024-06-03 18:50:27,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:27,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:27,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:27,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:27,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916471803] [2024-06-03 18:50:27,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916471803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:27,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:27,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:27,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244117256] [2024-06-03 18:50:27,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:27,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:27,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:27,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:27,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:27,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:27,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 176 transitions, 1978 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:27,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:27,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:27,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:27,648 INFO L124 PetriNetUnfolderBase]: 1193/1992 cut-off events. [2024-06-03 18:50:27,648 INFO L125 PetriNetUnfolderBase]: For 55638/55638 co-relation queries the response was YES. [2024-06-03 18:50:27,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12283 conditions, 1992 events. 1193/1992 cut-off events. For 55638/55638 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 10664 event pairs, 288 based on Foata normal form. 2/1987 useless extension candidates. Maximal degree in co-relation 12208. Up to 1676 conditions per place. [2024-06-03 18:50:27,665 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 131 selfloop transitions, 55 changer transitions 0/193 dead transitions. [2024-06-03 18:50:27,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 193 transitions, 2547 flow [2024-06-03 18:50:27,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:27,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 18:50:27,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-03 18:50:27,666 INFO L175 Difference]: Start difference. First operand has 148 places, 176 transitions, 1978 flow. Second operand 5 states and 127 transitions. [2024-06-03 18:50:27,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 193 transitions, 2547 flow [2024-06-03 18:50:27,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 193 transitions, 2452 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:27,767 INFO L231 Difference]: Finished difference. Result has 149 places, 179 transitions, 2052 flow [2024-06-03 18:50:27,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1887, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2052, PETRI_PLACES=149, PETRI_TRANSITIONS=179} [2024-06-03 18:50:27,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-03 18:50:27,767 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 179 transitions, 2052 flow [2024-06-03 18:50:27,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:27,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:27,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:27,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:50:27,768 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)] === [2024-06-03 18:50:27,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:27,768 INFO L85 PathProgramCache]: Analyzing trace with hash -535594140, now seen corresponding path program 1 times [2024-06-03 18:50:27,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:27,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339391485] [2024-06-03 18:50:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:27,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:27,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:27,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339391485] [2024-06-03 18:50:27,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339391485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:27,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:27,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733160724] [2024-06-03 18:50:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:27,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:27,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:27,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 42 [2024-06-03 18:50:27,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 179 transitions, 2052 flow. Second operand has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:27,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:27,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 42 [2024-06-03 18:50:27,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:28,248 INFO L124 PetriNetUnfolderBase]: 1129/1936 cut-off events. [2024-06-03 18:50:28,248 INFO L125 PetriNetUnfolderBase]: For 52808/52808 co-relation queries the response was YES. [2024-06-03 18:50:28,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1936 events. 1129/1936 cut-off events. For 52808/52808 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10581 event pairs, 265 based on Foata normal form. 2/1935 useless extension candidates. Maximal degree in co-relation 11764. Up to 1588 conditions per place. [2024-06-03 18:50:28,269 INFO L140 encePairwiseOnDemand]: 37/42 looper letters, 146 selfloop transitions, 10 changer transitions 0/190 dead transitions. [2024-06-03 18:50:28,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 190 transitions, 2410 flow [2024-06-03 18:50:28,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:50:28,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:50:28,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-03 18:50:28,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 18:50:28,270 INFO L175 Difference]: Start difference. First operand has 149 places, 179 transitions, 2052 flow. Second operand 4 states and 101 transitions. [2024-06-03 18:50:28,271 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 190 transitions, 2410 flow [2024-06-03 18:50:28,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 190 transitions, 2292 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:28,388 INFO L231 Difference]: Finished difference. Result has 150 places, 181 transitions, 1987 flow [2024-06-03 18:50:28,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1987, PETRI_PLACES=150, PETRI_TRANSITIONS=181} [2024-06-03 18:50:28,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-03 18:50:28,388 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 181 transitions, 1987 flow [2024-06-03 18:50:28,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.5) internal successors, (105), 6 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:28,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:28,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:28,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:50:28,389 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:28,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:28,389 INFO L85 PathProgramCache]: Analyzing trace with hash -303418928, now seen corresponding path program 1 times [2024-06-03 18:50:28,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:28,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944472050] [2024-06-03 18:50:28,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:28,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:28,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:28,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:28,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944472050] [2024-06-03 18:50:28,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944472050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:28,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:28,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:28,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044002655] [2024-06-03 18:50:28,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:28,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:28,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:28,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:28,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:28,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:28,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 181 transitions, 1987 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:28,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:28,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:28,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:28,973 INFO L124 PetriNetUnfolderBase]: 1315/2218 cut-off events. [2024-06-03 18:50:28,973 INFO L125 PetriNetUnfolderBase]: For 64395/64401 co-relation queries the response was YES. [2024-06-03 18:50:28,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13291 conditions, 2218 events. 1315/2218 cut-off events. For 64395/64401 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 12281 event pairs, 224 based on Foata normal form. 12/2223 useless extension candidates. Maximal degree in co-relation 13215. Up to 1496 conditions per place. [2024-06-03 18:50:28,990 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 47 changer transitions 0/235 dead transitions. [2024-06-03 18:50:28,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 235 transitions, 2736 flow [2024-06-03 18:50:28,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:50:28,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:50:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-03 18:50:28,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-03 18:50:28,993 INFO L175 Difference]: Start difference. First operand has 150 places, 181 transitions, 1987 flow. Second operand 9 states and 227 transitions. [2024-06-03 18:50:28,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 235 transitions, 2736 flow [2024-06-03 18:50:29,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 235 transitions, 2699 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 18:50:29,129 INFO L231 Difference]: Finished difference. Result has 159 places, 186 transitions, 2118 flow [2024-06-03 18:50:29,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1950, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2118, PETRI_PLACES=159, PETRI_TRANSITIONS=186} [2024-06-03 18:50:29,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-03 18:50:29,129 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 186 transitions, 2118 flow [2024-06-03 18:50:29,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:29,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:29,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:29,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:50:29,130 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:29,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:29,130 INFO L85 PathProgramCache]: Analyzing trace with hash -214705298, now seen corresponding path program 2 times [2024-06-03 18:50:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:29,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401669016] [2024-06-03 18:50:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:29,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:29,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401669016] [2024-06-03 18:50:29,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401669016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:29,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:29,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:29,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271904734] [2024-06-03 18:50:29,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:29,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:29,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:29,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:29,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:29,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 186 transitions, 2118 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:29,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:29,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:29,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:29,757 INFO L124 PetriNetUnfolderBase]: 1373/2326 cut-off events. [2024-06-03 18:50:29,757 INFO L125 PetriNetUnfolderBase]: For 70693/70699 co-relation queries the response was YES. [2024-06-03 18:50:29,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14099 conditions, 2326 events. 1373/2326 cut-off events. For 70693/70699 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 13085 event pairs, 329 based on Foata normal form. 16/2335 useless extension candidates. Maximal degree in co-relation 14020. Up to 1838 conditions per place. [2024-06-03 18:50:29,776 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 44 changer transitions 0/224 dead transitions. [2024-06-03 18:50:29,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 224 transitions, 2669 flow [2024-06-03 18:50:29,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:50:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:50:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-03 18:50:29,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 18:50:29,777 INFO L175 Difference]: Start difference. First operand has 159 places, 186 transitions, 2118 flow. Second operand 8 states and 200 transitions. [2024-06-03 18:50:29,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 224 transitions, 2669 flow [2024-06-03 18:50:29,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2599 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:29,876 INFO L231 Difference]: Finished difference. Result has 163 places, 187 transitions, 2160 flow [2024-06-03 18:50:29,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2160, PETRI_PLACES=163, PETRI_TRANSITIONS=187} [2024-06-03 18:50:29,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-03 18:50:29,877 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 187 transitions, 2160 flow [2024-06-03 18:50:29,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:29,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:29,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:29,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:50:29,877 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:29,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1434594660, now seen corresponding path program 3 times [2024-06-03 18:50:29,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:29,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546798373] [2024-06-03 18:50:29,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:29,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:30,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:30,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546798373] [2024-06-03 18:50:30,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546798373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:30,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:30,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:50:30,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369386351] [2024-06-03 18:50:30,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:30,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:50:30,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:30,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:50:30,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:50:30,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:30,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 187 transitions, 2160 flow. Second operand has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:30,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:30,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:30,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:30,454 INFO L124 PetriNetUnfolderBase]: 1414/2407 cut-off events. [2024-06-03 18:50:30,454 INFO L125 PetriNetUnfolderBase]: For 73375/73381 co-relation queries the response was YES. [2024-06-03 18:50:30,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14603 conditions, 2407 events. 1414/2407 cut-off events. For 73375/73381 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 13753 event pairs, 327 based on Foata normal form. 12/2412 useless extension candidates. Maximal degree in co-relation 14522. Up to 1822 conditions per place. [2024-06-03 18:50:30,475 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 177 selfloop transitions, 46 changer transitions 0/230 dead transitions. [2024-06-03 18:50:30,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 230 transitions, 2755 flow [2024-06-03 18:50:30,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:50:30,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:50:30,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 18:50:30,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-03 18:50:30,476 INFO L175 Difference]: Start difference. First operand has 163 places, 187 transitions, 2160 flow. Second operand 8 states and 203 transitions. [2024-06-03 18:50:30,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 230 transitions, 2755 flow [2024-06-03 18:50:30,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 230 transitions, 2666 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:50:30,594 INFO L231 Difference]: Finished difference. Result has 166 places, 190 transitions, 2214 flow [2024-06-03 18:50:30,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2214, PETRI_PLACES=166, PETRI_TRANSITIONS=190} [2024-06-03 18:50:30,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-03 18:50:30,595 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 190 transitions, 2214 flow [2024-06-03 18:50:30,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.75) internal successors, (126), 8 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:30,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:30,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:30,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:50:30,596 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)] === [2024-06-03 18:50:30,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:30,596 INFO L85 PathProgramCache]: Analyzing trace with hash 201918776, now seen corresponding path program 4 times [2024-06-03 18:50:30,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:30,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549256097] [2024-06-03 18:50:30,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:30,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:30,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:30,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:30,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549256097] [2024-06-03 18:50:30,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549256097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:30,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:30,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:30,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589488748] [2024-06-03 18:50:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:30,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:30,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:30,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:30,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:30,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 190 transitions, 2214 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:30,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:30,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:30,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:31,132 INFO L124 PetriNetUnfolderBase]: 1472/2483 cut-off events. [2024-06-03 18:50:31,132 INFO L125 PetriNetUnfolderBase]: For 80471/80471 co-relation queries the response was YES. [2024-06-03 18:50:31,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15136 conditions, 2483 events. 1472/2483 cut-off events. For 80471/80471 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14273 event pairs, 370 based on Foata normal form. 16/2484 useless extension candidates. Maximal degree in co-relation 15053. Up to 2007 conditions per place. [2024-06-03 18:50:31,149 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 167 selfloop transitions, 44 changer transitions 0/218 dead transitions. [2024-06-03 18:50:31,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 218 transitions, 2726 flow [2024-06-03 18:50:31,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:31,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:50:31,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:50:31,152 INFO L175 Difference]: Start difference. First operand has 166 places, 190 transitions, 2214 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:50:31,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 218 transitions, 2726 flow [2024-06-03 18:50:31,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 218 transitions, 2666 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:31,278 INFO L231 Difference]: Finished difference. Result has 169 places, 191 transitions, 2265 flow [2024-06-03 18:50:31,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2154, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=169, PETRI_TRANSITIONS=191} [2024-06-03 18:50:31,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-03 18:50:31,279 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 191 transitions, 2265 flow [2024-06-03 18:50:31,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:31,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:31,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:31,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:50:31,279 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)] === [2024-06-03 18:50:31,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:31,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1926200768, now seen corresponding path program 5 times [2024-06-03 18:50:31,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:31,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005140783] [2024-06-03 18:50:31,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:31,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:31,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:31,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005140783] [2024-06-03 18:50:31,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005140783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:31,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:31,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:31,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302129755] [2024-06-03 18:50:31,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:31,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:31,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:31,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:31,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:31,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:31,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 191 transitions, 2265 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:31,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:31,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:31,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:31,846 INFO L124 PetriNetUnfolderBase]: 1530/2591 cut-off events. [2024-06-03 18:50:31,846 INFO L125 PetriNetUnfolderBase]: For 84818/84818 co-relation queries the response was YES. [2024-06-03 18:50:31,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15796 conditions, 2591 events. 1530/2591 cut-off events. For 84818/84818 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15121 event pairs, 385 based on Foata normal form. 16/2592 useless extension candidates. Maximal degree in co-relation 15711. Up to 2105 conditions per place. [2024-06-03 18:50:31,867 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 43 changer transitions 0/219 dead transitions. [2024-06-03 18:50:31,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 219 transitions, 2781 flow [2024-06-03 18:50:31,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:50:31,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:50:31,869 INFO L175 Difference]: Start difference. First operand has 169 places, 191 transitions, 2265 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:50:31,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 219 transitions, 2781 flow [2024-06-03 18:50:32,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 219 transitions, 2688 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:32,018 INFO L231 Difference]: Finished difference. Result has 171 places, 192 transitions, 2283 flow [2024-06-03 18:50:32,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2172, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2283, PETRI_PLACES=171, PETRI_TRANSITIONS=192} [2024-06-03 18:50:32,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-03 18:50:32,019 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 192 transitions, 2283 flow [2024-06-03 18:50:32,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:32,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:32,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:32,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:50:32,019 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)] === [2024-06-03 18:50:32,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:32,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1926052898, now seen corresponding path program 6 times [2024-06-03 18:50:32,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:32,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633163070] [2024-06-03 18:50:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:32,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:32,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:32,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:32,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:32,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633163070] [2024-06-03 18:50:32,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633163070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:32,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:32,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:32,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136142304] [2024-06-03 18:50:32,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:32,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:32,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:32,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:32,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:32,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 192 transitions, 2283 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:32,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:32,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:32,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:32,553 INFO L124 PetriNetUnfolderBase]: 1546/2623 cut-off events. [2024-06-03 18:50:32,553 INFO L125 PetriNetUnfolderBase]: For 85436/85436 co-relation queries the response was YES. [2024-06-03 18:50:32,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15877 conditions, 2623 events. 1546/2623 cut-off events. For 85436/85436 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 15371 event pairs, 376 based on Foata normal form. 12/2620 useless extension candidates. Maximal degree in co-relation 15791. Up to 1958 conditions per place. [2024-06-03 18:50:32,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 172 selfloop transitions, 46 changer transitions 0/225 dead transitions. [2024-06-03 18:50:32,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 225 transitions, 2847 flow [2024-06-03 18:50:32,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:32,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 18:50:32,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 18:50:32,577 INFO L175 Difference]: Start difference. First operand has 171 places, 192 transitions, 2283 flow. Second operand 7 states and 175 transitions. [2024-06-03 18:50:32,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 225 transitions, 2847 flow [2024-06-03 18:50:32,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 225 transitions, 2754 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:32,725 INFO L231 Difference]: Finished difference. Result has 174 places, 195 transitions, 2341 flow [2024-06-03 18:50:32,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2190, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2341, PETRI_PLACES=174, PETRI_TRANSITIONS=195} [2024-06-03 18:50:32,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-03 18:50:32,725 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 195 transitions, 2341 flow [2024-06-03 18:50:32,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:32,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:32,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:32,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:50:32,726 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)] === [2024-06-03 18:50:32,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:32,726 INFO L85 PathProgramCache]: Analyzing trace with hash 2133127070, now seen corresponding path program 1 times [2024-06-03 18:50:32,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:32,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969315501] [2024-06-03 18:50:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:32,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:32,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:32,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969315501] [2024-06-03 18:50:32,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969315501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:32,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:32,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:32,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244016367] [2024-06-03 18:50:32,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:32,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:32,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:32,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:32,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:32,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 195 transitions, 2341 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:32,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:32,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:32,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:33,287 INFO L124 PetriNetUnfolderBase]: 1587/2704 cut-off events. [2024-06-03 18:50:33,287 INFO L125 PetriNetUnfolderBase]: For 90394/90394 co-relation queries the response was YES. [2024-06-03 18:50:33,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16332 conditions, 2704 events. 1587/2704 cut-off events. For 90394/90394 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 16043 event pairs, 352 based on Foata normal form. 12/2701 useless extension candidates. Maximal degree in co-relation 16244. Up to 1919 conditions per place. [2024-06-03 18:50:33,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 49 changer transitions 0/226 dead transitions. [2024-06-03 18:50:33,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 226 transitions, 2885 flow [2024-06-03 18:50:33,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:33,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 18:50:33,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 18:50:33,310 INFO L175 Difference]: Start difference. First operand has 174 places, 195 transitions, 2341 flow. Second operand 7 states and 176 transitions. [2024-06-03 18:50:33,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 226 transitions, 2885 flow [2024-06-03 18:50:33,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 226 transitions, 2817 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:33,465 INFO L231 Difference]: Finished difference. Result has 178 places, 196 transitions, 2399 flow [2024-06-03 18:50:33,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2273, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=178, PETRI_TRANSITIONS=196} [2024-06-03 18:50:33,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-03 18:50:33,466 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 196 transitions, 2399 flow [2024-06-03 18:50:33,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:33,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:33,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:33,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:50:33,466 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)] === [2024-06-03 18:50:33,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:33,467 INFO L85 PathProgramCache]: Analyzing trace with hash -427492630, now seen corresponding path program 7 times [2024-06-03 18:50:33,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:33,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823249725] [2024-06-03 18:50:33,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:33,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:33,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:33,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823249725] [2024-06-03 18:50:33,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823249725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:33,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:33,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:33,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184736485] [2024-06-03 18:50:33,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:33,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:33,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:33,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:33,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:33,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:33,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 196 transitions, 2399 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:33,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:33,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:33,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:34,077 INFO L124 PetriNetUnfolderBase]: 1628/2798 cut-off events. [2024-06-03 18:50:34,077 INFO L125 PetriNetUnfolderBase]: For 94785/94791 co-relation queries the response was YES. [2024-06-03 18:50:34,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16932 conditions, 2798 events. 1628/2798 cut-off events. For 94785/94791 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 16773 event pairs, 317 based on Foata normal form. 12/2802 useless extension candidates. Maximal degree in co-relation 16842. Up to 2106 conditions per place. [2024-06-03 18:50:34,100 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-03 18:50:34,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 236 transitions, 3121 flow [2024-06-03 18:50:34,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:34,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 18:50:34,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-03 18:50:34,102 INFO L175 Difference]: Start difference. First operand has 178 places, 196 transitions, 2399 flow. Second operand 7 states and 184 transitions. [2024-06-03 18:50:34,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 236 transitions, 3121 flow [2024-06-03 18:50:34,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 236 transitions, 3009 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:34,276 INFO L231 Difference]: Finished difference. Result has 181 places, 198 transitions, 2419 flow [2024-06-03 18:50:34,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2287, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2419, PETRI_PLACES=181, PETRI_TRANSITIONS=198} [2024-06-03 18:50:34,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-03 18:50:34,277 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 198 transitions, 2419 flow [2024-06-03 18:50:34,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:34,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:34,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:34,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:50:34,278 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)] === [2024-06-03 18:50:34,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:34,278 INFO L85 PathProgramCache]: Analyzing trace with hash -597628874, now seen corresponding path program 8 times [2024-06-03 18:50:34,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:34,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329098407] [2024-06-03 18:50:34,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:34,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:34,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:34,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:34,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329098407] [2024-06-03 18:50:34,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329098407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:34,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:34,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:34,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349641898] [2024-06-03 18:50:34,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:34,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:34,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:34,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:34,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:34,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:34,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 198 transitions, 2419 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:34,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:34,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:34,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:34,965 INFO L124 PetriNetUnfolderBase]: 1686/2896 cut-off events. [2024-06-03 18:50:34,966 INFO L125 PetriNetUnfolderBase]: For 102173/102179 co-relation queries the response was YES. [2024-06-03 18:50:34,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17434 conditions, 2896 events. 1686/2896 cut-off events. For 102173/102179 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 17488 event pairs, 422 based on Foata normal form. 16/2904 useless extension candidates. Maximal degree in co-relation 17342. Up to 2377 conditions per place. [2024-06-03 18:50:34,991 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-03 18:50:34,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 232 transitions, 2981 flow [2024-06-03 18:50:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 18:50:34,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 18:50:34,992 INFO L175 Difference]: Start difference. First operand has 181 places, 198 transitions, 2419 flow. Second operand 7 states and 179 transitions. [2024-06-03 18:50:34,992 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 232 transitions, 2981 flow [2024-06-03 18:50:35,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 232 transitions, 2837 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 18:50:35,171 INFO L231 Difference]: Finished difference. Result has 182 places, 199 transitions, 2392 flow [2024-06-03 18:50:35,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2279, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2392, PETRI_PLACES=182, PETRI_TRANSITIONS=199} [2024-06-03 18:50:35,171 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-03 18:50:35,171 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 199 transitions, 2392 flow [2024-06-03 18:50:35,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:35,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:35,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:35,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 18:50:35,172 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)] === [2024-06-03 18:50:35,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:35,173 INFO L85 PathProgramCache]: Analyzing trace with hash -398182934, now seen corresponding path program 9 times [2024-06-03 18:50:35,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:35,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561642917] [2024-06-03 18:50:35,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:35,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:35,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:35,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:35,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:35,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561642917] [2024-06-03 18:50:35,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561642917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:35,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:35,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:35,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363082987] [2024-06-03 18:50:35,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:35,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:35,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:35,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:35,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:35,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:35,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 199 transitions, 2392 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:35,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:35,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:35,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:35,752 INFO L124 PetriNetUnfolderBase]: 1744/2994 cut-off events. [2024-06-03 18:50:35,752 INFO L125 PetriNetUnfolderBase]: For 106768/106774 co-relation queries the response was YES. [2024-06-03 18:50:35,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17684 conditions, 2994 events. 1744/2994 cut-off events. For 106768/106774 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 18262 event pairs, 432 based on Foata normal form. 16/3002 useless extension candidates. Maximal degree in co-relation 17592. Up to 2475 conditions per place. [2024-06-03 18:50:35,776 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 180 selfloop transitions, 43 changer transitions 0/230 dead transitions. [2024-06-03 18:50:35,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 230 transitions, 2940 flow [2024-06-03 18:50:35,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:35,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:35,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 18:50:35,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 18:50:35,777 INFO L175 Difference]: Start difference. First operand has 182 places, 199 transitions, 2392 flow. Second operand 7 states and 176 transitions. [2024-06-03 18:50:35,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 230 transitions, 2940 flow [2024-06-03 18:50:35,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 230 transitions, 2849 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:35,950 INFO L231 Difference]: Finished difference. Result has 184 places, 200 transitions, 2414 flow [2024-06-03 18:50:35,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2301, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2414, PETRI_PLACES=184, PETRI_TRANSITIONS=200} [2024-06-03 18:50:35,951 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 18:50:35,951 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 200 transitions, 2414 flow [2024-06-03 18:50:35,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:35,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:35,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:35,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 18:50:35,952 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)] === [2024-06-03 18:50:35,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:35,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1285671304, now seen corresponding path program 10 times [2024-06-03 18:50:35,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:35,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690388155] [2024-06-03 18:50:35,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:35,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690388155] [2024-06-03 18:50:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690388155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:36,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:36,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:36,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417875812] [2024-06-03 18:50:36,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:36,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:36,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:36,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:36,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:36,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 200 transitions, 2414 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:36,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:36,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:36,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:36,479 INFO L124 PetriNetUnfolderBase]: 1716/2940 cut-off events. [2024-06-03 18:50:36,479 INFO L125 PetriNetUnfolderBase]: For 101748/101754 co-relation queries the response was YES. [2024-06-03 18:50:36,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17014 conditions, 2940 events. 1716/2940 cut-off events. For 101748/101754 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17903 event pairs, 418 based on Foata normal form. 20/2948 useless extension candidates. Maximal degree in co-relation 16921. Up to 2431 conditions per place. [2024-06-03 18:50:36,504 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 179 selfloop transitions, 42 changer transitions 0/228 dead transitions. [2024-06-03 18:50:36,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2952 flow [2024-06-03 18:50:36,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:36,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 18:50:36,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 18:50:36,505 INFO L175 Difference]: Start difference. First operand has 184 places, 200 transitions, 2414 flow. Second operand 7 states and 170 transitions. [2024-06-03 18:50:36,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2952 flow [2024-06-03 18:50:36,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2849 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:36,750 INFO L231 Difference]: Finished difference. Result has 186 places, 201 transitions, 2424 flow [2024-06-03 18:50:36,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2317, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2424, PETRI_PLACES=186, PETRI_TRANSITIONS=201} [2024-06-03 18:50:36,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-03 18:50:36,750 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 201 transitions, 2424 flow [2024-06-03 18:50:36,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:36,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:36,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:36,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 18:50:36,751 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)] === [2024-06-03 18:50:36,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1293295816, now seen corresponding path program 2 times [2024-06-03 18:50:36,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:36,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042187520] [2024-06-03 18:50:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:36,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:36,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042187520] [2024-06-03 18:50:36,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042187520] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:36,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:36,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:36,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647493532] [2024-06-03 18:50:36,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:36,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:36,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:36,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:36,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:36,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:36,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 201 transitions, 2424 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:36,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:36,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:36,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:37,329 INFO L124 PetriNetUnfolderBase]: 1757/3021 cut-off events. [2024-06-03 18:50:37,330 INFO L125 PetriNetUnfolderBase]: For 103207/103213 co-relation queries the response was YES. [2024-06-03 18:50:37,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17312 conditions, 3021 events. 1757/3021 cut-off events. For 103207/103213 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 18588 event pairs, 418 based on Foata normal form. 16/3025 useless extension candidates. Maximal degree in co-relation 17218. Up to 2415 conditions per place. [2024-06-03 18:50:37,363 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 44 changer transitions 0/232 dead transitions. [2024-06-03 18:50:37,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 232 transitions, 2982 flow [2024-06-03 18:50:37,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:37,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:50:37,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:50:37,367 INFO L175 Difference]: Start difference. First operand has 186 places, 201 transitions, 2424 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:50:37,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 232 transitions, 2982 flow [2024-06-03 18:50:37,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 232 transitions, 2897 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:37,564 INFO L231 Difference]: Finished difference. Result has 188 places, 202 transitions, 2457 flow [2024-06-03 18:50:37,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2339, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2457, PETRI_PLACES=188, PETRI_TRANSITIONS=202} [2024-06-03 18:50:37,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 18:50:37,565 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 202 transitions, 2457 flow [2024-06-03 18:50:37,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:37,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:37,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:37,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 18:50:37,566 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)] === [2024-06-03 18:50:37,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:37,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1364068624, now seen corresponding path program 3 times [2024-06-03 18:50:37,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:37,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944573735] [2024-06-03 18:50:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:37,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:37,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:37,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:37,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944573735] [2024-06-03 18:50:37,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944573735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:37,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:37,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:37,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580548147] [2024-06-03 18:50:37,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:37,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:37,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:37,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:37,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:37,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 202 transitions, 2457 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:37,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:37,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:37,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:38,156 INFO L124 PetriNetUnfolderBase]: 1798/3107 cut-off events. [2024-06-03 18:50:38,156 INFO L125 PetriNetUnfolderBase]: For 107677/107683 co-relation queries the response was YES. [2024-06-03 18:50:38,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17761 conditions, 3107 events. 1798/3107 cut-off events. For 107677/107683 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 19246 event pairs, 431 based on Foata normal form. 12/3111 useless extension candidates. Maximal degree in co-relation 17666. Up to 2394 conditions per place. [2024-06-03 18:50:38,181 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 183 selfloop transitions, 46 changer transitions 0/236 dead transitions. [2024-06-03 18:50:38,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 236 transitions, 3033 flow [2024-06-03 18:50:38,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:38,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 18:50:38,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-03 18:50:38,183 INFO L175 Difference]: Start difference. First operand has 188 places, 202 transitions, 2457 flow. Second operand 7 states and 178 transitions. [2024-06-03 18:50:38,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 236 transitions, 3033 flow [2024-06-03 18:50:38,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 236 transitions, 2929 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:38,369 INFO L231 Difference]: Finished difference. Result has 190 places, 203 transitions, 2477 flow [2024-06-03 18:50:38,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2353, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2477, PETRI_PLACES=190, PETRI_TRANSITIONS=203} [2024-06-03 18:50:38,369 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 18:50:38,369 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 203 transitions, 2477 flow [2024-06-03 18:50:38,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:38,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:38,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 18:50:38,370 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)] === [2024-06-03 18:50:38,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:38,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1855156424, now seen corresponding path program 4 times [2024-06-03 18:50:38,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:38,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769733267] [2024-06-03 18:50:38,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:38,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:38,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:38,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769733267] [2024-06-03 18:50:38,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769733267] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:38,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:38,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:38,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184984382] [2024-06-03 18:50:38,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:38,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:38,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:38,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:38,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:38,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:38,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 203 transitions, 2477 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:38,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:38,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:38,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:38,944 INFO L124 PetriNetUnfolderBase]: 1778/3075 cut-off events. [2024-06-03 18:50:38,944 INFO L125 PetriNetUnfolderBase]: For 103287/103293 co-relation queries the response was YES. [2024-06-03 18:50:38,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17193 conditions, 3075 events. 1778/3075 cut-off events. For 103287/103293 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 19150 event pairs, 378 based on Foata normal form. 16/3079 useless extension candidates. Maximal degree in co-relation 17097. Up to 1710 conditions per place. [2024-06-03 18:50:38,971 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 171 selfloop transitions, 55 changer transitions 0/233 dead transitions. [2024-06-03 18:50:38,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 233 transitions, 2943 flow [2024-06-03 18:50:38,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:38,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 18:50:38,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 18:50:38,972 INFO L175 Difference]: Start difference. First operand has 190 places, 203 transitions, 2477 flow. Second operand 7 states and 172 transitions. [2024-06-03 18:50:38,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 233 transitions, 2943 flow [2024-06-03 18:50:39,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 233 transitions, 2815 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 18:50:39,179 INFO L231 Difference]: Finished difference. Result has 190 places, 202 transitions, 2389 flow [2024-06-03 18:50:39,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2389, PETRI_PLACES=190, PETRI_TRANSITIONS=202} [2024-06-03 18:50:39,180 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 18:50:39,180 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 202 transitions, 2389 flow [2024-06-03 18:50:39,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:39,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:39,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:39,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 18:50:39,181 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:39,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:39,182 INFO L85 PathProgramCache]: Analyzing trace with hash 113752879, now seen corresponding path program 1 times [2024-06-03 18:50:39,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:39,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534041833] [2024-06-03 18:50:39,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:39,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:39,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:39,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534041833] [2024-06-03 18:50:39,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534041833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:39,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:39,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:39,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412543496] [2024-06-03 18:50:39,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:39,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:39,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:39,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:39,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:39,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:39,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 202 transitions, 2389 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:39,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:39,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:39,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:39,823 INFO L124 PetriNetUnfolderBase]: 1796/3079 cut-off events. [2024-06-03 18:50:39,823 INFO L125 PetriNetUnfolderBase]: For 95212/95212 co-relation queries the response was YES. [2024-06-03 18:50:39,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17323 conditions, 3079 events. 1796/3079 cut-off events. For 95212/95212 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 18972 event pairs, 430 based on Foata normal form. 2/3073 useless extension candidates. Maximal degree in co-relation 17227. Up to 2581 conditions per place. [2024-06-03 18:50:39,850 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 147 selfloop transitions, 79 changer transitions 0/233 dead transitions. [2024-06-03 18:50:39,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 233 transitions, 3265 flow [2024-06-03 18:50:39,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:39,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:50:39,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 18:50:39,851 INFO L175 Difference]: Start difference. First operand has 190 places, 202 transitions, 2389 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:50:39,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 233 transitions, 3265 flow [2024-06-03 18:50:40,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 233 transitions, 3068 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 18:50:40,014 INFO L231 Difference]: Finished difference. Result has 190 places, 213 transitions, 2483 flow [2024-06-03 18:50:40,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2483, PETRI_PLACES=190, PETRI_TRANSITIONS=213} [2024-06-03 18:50:40,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-03 18:50:40,015 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 213 transitions, 2483 flow [2024-06-03 18:50:40,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:40,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:40,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:40,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 18:50:40,015 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:40,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:40,015 INFO L85 PathProgramCache]: Analyzing trace with hash 418301511, now seen corresponding path program 2 times [2024-06-03 18:50:40,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:40,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38862991] [2024-06-03 18:50:40,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:40,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:40,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:40,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:40,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38862991] [2024-06-03 18:50:40,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38862991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:40,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:40,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:40,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338577075] [2024-06-03 18:50:40,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:40,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:40,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:40,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:40,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:40,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:40,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 213 transitions, 2483 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:40,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:40,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:40,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:40,576 INFO L124 PetriNetUnfolderBase]: 1822/3126 cut-off events. [2024-06-03 18:50:40,576 INFO L125 PetriNetUnfolderBase]: For 100827/100827 co-relation queries the response was YES. [2024-06-03 18:50:40,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17461 conditions, 3126 events. 1822/3126 cut-off events. For 100827/100827 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19326 event pairs, 419 based on Foata normal form. 2/3121 useless extension candidates. Maximal degree in co-relation 17366. Up to 2724 conditions per place. [2024-06-03 18:50:40,663 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 66 changer transitions 0/238 dead transitions. [2024-06-03 18:50:40,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 238 transitions, 3353 flow [2024-06-03 18:50:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:40,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 18:50:40,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 18:50:40,664 INFO L175 Difference]: Start difference. First operand has 190 places, 213 transitions, 2483 flow. Second operand 7 states and 167 transitions. [2024-06-03 18:50:40,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 238 transitions, 3353 flow [2024-06-03 18:50:40,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 238 transitions, 3218 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:40,843 INFO L231 Difference]: Finished difference. Result has 194 places, 221 transitions, 2599 flow [2024-06-03 18:50:40,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2364, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2599, PETRI_PLACES=194, PETRI_TRANSITIONS=221} [2024-06-03 18:50:40,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-03 18:50:40,844 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 221 transitions, 2599 flow [2024-06-03 18:50:40,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:40,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:40,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:40,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 18:50:40,844 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:40,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:40,844 INFO L85 PathProgramCache]: Analyzing trace with hash 418307091, now seen corresponding path program 3 times [2024-06-03 18:50:40,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:40,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458274484] [2024-06-03 18:50:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:40,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:40,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:40,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:40,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:40,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458274484] [2024-06-03 18:50:40,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458274484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:40,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:40,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:40,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235103693] [2024-06-03 18:50:40,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:40,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:40,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:40,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:41,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:41,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 221 transitions, 2599 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:41,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:41,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:41,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:41,445 INFO L124 PetriNetUnfolderBase]: 1816/3118 cut-off events. [2024-06-03 18:50:41,445 INFO L125 PetriNetUnfolderBase]: For 103174/103174 co-relation queries the response was YES. [2024-06-03 18:50:41,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17423 conditions, 3118 events. 1816/3118 cut-off events. For 103174/103174 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 19260 event pairs, 419 based on Foata normal form. 2/3113 useless extension candidates. Maximal degree in co-relation 17326. Up to 2718 conditions per place. [2024-06-03 18:50:41,471 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 165 selfloop transitions, 67 changer transitions 0/239 dead transitions. [2024-06-03 18:50:41,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 239 transitions, 3285 flow [2024-06-03 18:50:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:50:41,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:50:41,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 18:50:41,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343915343915344 [2024-06-03 18:50:41,472 INFO L175 Difference]: Start difference. First operand has 194 places, 221 transitions, 2599 flow. Second operand 9 states and 202 transitions. [2024-06-03 18:50:41,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 239 transitions, 3285 flow [2024-06-03 18:50:41,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 239 transitions, 3165 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:41,664 INFO L231 Difference]: Finished difference. Result has 200 places, 221 transitions, 2620 flow [2024-06-03 18:50:41,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2479, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2620, PETRI_PLACES=200, PETRI_TRANSITIONS=221} [2024-06-03 18:50:41,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-03 18:50:41,664 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 221 transitions, 2620 flow [2024-06-03 18:50:41,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:41,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:41,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:41,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 18:50:41,664 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)] === [2024-06-03 18:50:41,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:41,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1919689313, now seen corresponding path program 4 times [2024-06-03 18:50:41,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:41,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715825655] [2024-06-03 18:50:41,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:41,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:41,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:41,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715825655] [2024-06-03 18:50:41,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715825655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:41,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:41,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:41,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845261619] [2024-06-03 18:50:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:41,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:41,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:41,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:41,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:41,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:41,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 221 transitions, 2620 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:41,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:41,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:41,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:42,293 INFO L124 PetriNetUnfolderBase]: 1857/3197 cut-off events. [2024-06-03 18:50:42,293 INFO L125 PetriNetUnfolderBase]: For 108149/108149 co-relation queries the response was YES. [2024-06-03 18:50:42,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18172 conditions, 3197 events. 1857/3197 cut-off events. For 108149/108149 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 19902 event pairs, 397 based on Foata normal form. 2/3196 useless extension candidates. Maximal degree in co-relation 18073. Up to 2785 conditions per place. [2024-06-03 18:50:42,318 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 53 changer transitions 0/263 dead transitions. [2024-06-03 18:50:42,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 263 transitions, 3561 flow [2024-06-03 18:50:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 18:50:42,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 18:50:42,319 INFO L175 Difference]: Start difference. First operand has 200 places, 221 transitions, 2620 flow. Second operand 6 states and 156 transitions. [2024-06-03 18:50:42,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 263 transitions, 3561 flow [2024-06-03 18:50:42,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 263 transitions, 3408 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:50:42,561 INFO L231 Difference]: Finished difference. Result has 200 places, 239 transitions, 2934 flow [2024-06-03 18:50:42,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2475, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2934, PETRI_PLACES=200, PETRI_TRANSITIONS=239} [2024-06-03 18:50:42,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-03 18:50:42,562 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 239 transitions, 2934 flow [2024-06-03 18:50:42,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:42,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:42,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:42,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 18:50:42,563 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)] === [2024-06-03 18:50:42,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:42,563 INFO L85 PathProgramCache]: Analyzing trace with hash 568817961, now seen corresponding path program 5 times [2024-06-03 18:50:42,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:42,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184238315] [2024-06-03 18:50:42,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:42,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:42,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:42,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:42,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184238315] [2024-06-03 18:50:42,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184238315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:42,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:42,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:42,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050311668] [2024-06-03 18:50:42,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:42,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:42,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:42,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:42,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:42,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:42,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 239 transitions, 2934 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:42,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:42,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:42,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:43,160 INFO L124 PetriNetUnfolderBase]: 1875/3218 cut-off events. [2024-06-03 18:50:43,160 INFO L125 PetriNetUnfolderBase]: For 115488/115488 co-relation queries the response was YES. [2024-06-03 18:50:43,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18678 conditions, 3218 events. 1875/3218 cut-off events. For 115488/115488 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20075 event pairs, 420 based on Foata normal form. 2/3213 useless extension candidates. Maximal degree in co-relation 18576. Up to 2680 conditions per place. [2024-06-03 18:50:43,196 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 156 selfloop transitions, 107 changer transitions 0/270 dead transitions. [2024-06-03 18:50:43,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 270 transitions, 3996 flow [2024-06-03 18:50:43,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:43,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 18:50:43,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 18:50:43,197 INFO L175 Difference]: Start difference. First operand has 200 places, 239 transitions, 2934 flow. Second operand 7 states and 175 transitions. [2024-06-03 18:50:43,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 270 transitions, 3996 flow [2024-06-03 18:50:43,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 270 transitions, 3894 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:43,486 INFO L231 Difference]: Finished difference. Result has 205 places, 246 transitions, 3198 flow [2024-06-03 18:50:43,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2832, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3198, PETRI_PLACES=205, PETRI_TRANSITIONS=246} [2024-06-03 18:50:43,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-03 18:50:43,487 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 246 transitions, 3198 flow [2024-06-03 18:50:43,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:43,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:43,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:43,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 18:50:43,488 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)] === [2024-06-03 18:50:43,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:43,488 INFO L85 PathProgramCache]: Analyzing trace with hash 568823541, now seen corresponding path program 6 times [2024-06-03 18:50:43,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:43,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629751332] [2024-06-03 18:50:43,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:43,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:43,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:43,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:43,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:43,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629751332] [2024-06-03 18:50:43,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629751332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:43,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:43,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:43,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52658139] [2024-06-03 18:50:43,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:43,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:43,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:43,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:43,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:43,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 246 transitions, 3198 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:43,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:43,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:43,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:44,196 INFO L124 PetriNetUnfolderBase]: 1877/3224 cut-off events. [2024-06-03 18:50:44,196 INFO L125 PetriNetUnfolderBase]: For 120322/120322 co-relation queries the response was YES. [2024-06-03 18:50:44,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18994 conditions, 3224 events. 1877/3224 cut-off events. For 120322/120322 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20077 event pairs, 420 based on Foata normal form. 2/3219 useless extension candidates. Maximal degree in co-relation 18890. Up to 2684 conditions per place. [2024-06-03 18:50:44,223 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 155 selfloop transitions, 113 changer transitions 0/275 dead transitions. [2024-06-03 18:50:44,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 275 transitions, 4228 flow [2024-06-03 18:50:44,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:50:44,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:50:44,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 18:50:44,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 18:50:44,224 INFO L175 Difference]: Start difference. First operand has 205 places, 246 transitions, 3198 flow. Second operand 9 states and 213 transitions. [2024-06-03 18:50:44,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 275 transitions, 4228 flow [2024-06-03 18:50:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 275 transitions, 3982 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:44,553 INFO L231 Difference]: Finished difference. Result has 209 places, 249 transitions, 3246 flow [2024-06-03 18:50:44,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3246, PETRI_PLACES=209, PETRI_TRANSITIONS=249} [2024-06-03 18:50:44,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-03 18:50:44,554 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 249 transitions, 3246 flow [2024-06-03 18:50:44,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:44,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:44,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:44,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 18:50:44,555 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)] === [2024-06-03 18:50:44,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:44,555 INFO L85 PathProgramCache]: Analyzing trace with hash -465768761, now seen corresponding path program 1 times [2024-06-03 18:50:44,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:44,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467543430] [2024-06-03 18:50:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:44,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:44,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:44,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:44,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467543430] [2024-06-03 18:50:44,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467543430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:44,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:44,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:44,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957024605] [2024-06-03 18:50:44,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:44,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:44,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:44,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:44,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:44,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:44,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 249 transitions, 3246 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:44,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:44,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:44,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:45,162 INFO L124 PetriNetUnfolderBase]: 1905/3286 cut-off events. [2024-06-03 18:50:45,162 INFO L125 PetriNetUnfolderBase]: For 121649/121655 co-relation queries the response was YES. [2024-06-03 18:50:45,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19267 conditions, 3286 events. 1905/3286 cut-off events. For 121649/121655 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20635 event pairs, 425 based on Foata normal form. 6/3286 useless extension candidates. Maximal degree in co-relation 19163. Up to 2729 conditions per place. [2024-06-03 18:50:45,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 78 changer transitions 0/290 dead transitions. [2024-06-03 18:50:45,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 290 transitions, 4307 flow [2024-06-03 18:50:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:45,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 18:50:45,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-03 18:50:45,195 INFO L175 Difference]: Start difference. First operand has 209 places, 249 transitions, 3246 flow. Second operand 7 states and 177 transitions. [2024-06-03 18:50:45,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 290 transitions, 4307 flow [2024-06-03 18:50:45,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 290 transitions, 4032 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 18:50:45,560 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3298 flow [2024-06-03 18:50:45,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2977, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3298, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-03 18:50:45,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-03 18:50:45,560 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3298 flow [2024-06-03 18:50:45,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:45,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:45,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:45,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 18:50:45,561 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)] === [2024-06-03 18:50:45,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:45,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1150102743, now seen corresponding path program 2 times [2024-06-03 18:50:45,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:45,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637137524] [2024-06-03 18:50:45,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:45,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:45,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:45,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:45,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637137524] [2024-06-03 18:50:45,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637137524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:45,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:45,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:45,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445867650] [2024-06-03 18:50:45,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:45,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:45,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:45,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:45,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:45,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:45,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 3298 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:45,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:45,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:45,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:46,238 INFO L124 PetriNetUnfolderBase]: 1941/3348 cut-off events. [2024-06-03 18:50:46,238 INFO L125 PetriNetUnfolderBase]: For 124584/124590 co-relation queries the response was YES. [2024-06-03 18:50:46,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19813 conditions, 3348 events. 1941/3348 cut-off events. For 124584/124590 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 21138 event pairs, 426 based on Foata normal form. 6/3348 useless extension candidates. Maximal degree in co-relation 19708. Up to 2760 conditions per place. [2024-06-03 18:50:46,273 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 84 changer transitions 0/296 dead transitions. [2024-06-03 18:50:46,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 296 transitions, 4351 flow [2024-06-03 18:50:46,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:46,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:50:46,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:50:46,274 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3298 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:50:46,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 296 transitions, 4351 flow [2024-06-03 18:50:46,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 296 transitions, 4247 flow, removed 35 selfloop flow, removed 1 redundant places. [2024-06-03 18:50:46,636 INFO L231 Difference]: Finished difference. Result has 216 places, 276 transitions, 3520 flow [2024-06-03 18:50:46,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3214, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3520, PETRI_PLACES=216, PETRI_TRANSITIONS=276} [2024-06-03 18:50:46,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-03 18:50:46,636 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 276 transitions, 3520 flow [2024-06-03 18:50:46,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:46,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:46,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:46,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 18:50:46,637 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)] === [2024-06-03 18:50:46,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:46,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1149716793, now seen corresponding path program 3 times [2024-06-03 18:50:46,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:46,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374052976] [2024-06-03 18:50:46,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:46,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:46,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:46,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:46,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374052976] [2024-06-03 18:50:46,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374052976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:46,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:46,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:46,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320736651] [2024-06-03 18:50:46,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:46,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:46,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:46,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:46,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:46,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 276 transitions, 3520 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:46,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:46,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:46,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:47,320 INFO L124 PetriNetUnfolderBase]: 1935/3340 cut-off events. [2024-06-03 18:50:47,320 INFO L125 PetriNetUnfolderBase]: For 127182/127188 co-relation queries the response was YES. [2024-06-03 18:50:47,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19966 conditions, 3340 events. 1935/3340 cut-off events. For 127182/127188 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21095 event pairs, 426 based on Foata normal form. 6/3340 useless extension candidates. Maximal degree in co-relation 19857. Up to 2755 conditions per place. [2024-06-03 18:50:47,351 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 203 selfloop transitions, 85 changer transitions 0/295 dead transitions. [2024-06-03 18:50:47,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 295 transitions, 4338 flow [2024-06-03 18:50:47,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:50:47,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 18:50:47,352 INFO L175 Difference]: Start difference. First operand has 216 places, 276 transitions, 3520 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:50:47,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 295 transitions, 4338 flow [2024-06-03 18:50:47,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 295 transitions, 4170 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:47,627 INFO L231 Difference]: Finished difference. Result has 220 places, 276 transitions, 3529 flow [2024-06-03 18:50:47,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3529, PETRI_PLACES=220, PETRI_TRANSITIONS=276} [2024-06-03 18:50:47,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 18:50:47,628 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 276 transitions, 3529 flow [2024-06-03 18:50:47,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:47,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:47,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:47,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 18:50:47,628 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)] === [2024-06-03 18:50:47,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:47,629 INFO L85 PathProgramCache]: Analyzing trace with hash 2038670795, now seen corresponding path program 1 times [2024-06-03 18:50:47,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:47,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408042963] [2024-06-03 18:50:47,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:47,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:47,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:47,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408042963] [2024-06-03 18:50:47,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408042963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:47,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:47,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:47,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105623793] [2024-06-03 18:50:47,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:47,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:47,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:47,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:47,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:47,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:47,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 276 transitions, 3529 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:47,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:47,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:47,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:48,288 INFO L124 PetriNetUnfolderBase]: 1940/3345 cut-off events. [2024-06-03 18:50:48,288 INFO L125 PetriNetUnfolderBase]: For 130626/130632 co-relation queries the response was YES. [2024-06-03 18:50:48,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20116 conditions, 3345 events. 1940/3345 cut-off events. For 130626/130632 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 21127 event pairs, 416 based on Foata normal form. 5/3345 useless extension candidates. Maximal degree in co-relation 20006. Up to 2902 conditions per place. [2024-06-03 18:50:48,316 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 230 selfloop transitions, 61 changer transitions 0/298 dead transitions. [2024-06-03 18:50:48,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 298 transitions, 4414 flow [2024-06-03 18:50:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:48,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:48,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 18:50:48,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 18:50:48,317 INFO L175 Difference]: Start difference. First operand has 220 places, 276 transitions, 3529 flow. Second operand 7 states and 166 transitions. [2024-06-03 18:50:48,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 298 transitions, 4414 flow [2024-06-03 18:50:48,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 298 transitions, 4250 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:48,596 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3550 flow [2024-06-03 18:50:48,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3369, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3550, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-03 18:50:48,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-03 18:50:48,596 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3550 flow [2024-06-03 18:50:48,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:48,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:48,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:48,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 18:50:48,597 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)] === [2024-06-03 18:50:48,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash -2043857763, now seen corresponding path program 1 times [2024-06-03 18:50:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:48,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658248188] [2024-06-03 18:50:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:48,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:48,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:48,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658248188] [2024-06-03 18:50:48,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658248188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:48,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:48,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:48,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354130378] [2024-06-03 18:50:48,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:48,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:48,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:48,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:48,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:48,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3550 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:48,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:48,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:48,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:49,243 INFO L124 PetriNetUnfolderBase]: 1956/3369 cut-off events. [2024-06-03 18:50:49,244 INFO L125 PetriNetUnfolderBase]: For 139381/139387 co-relation queries the response was YES. [2024-06-03 18:50:49,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20289 conditions, 3369 events. 1956/3369 cut-off events. For 139381/139387 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 21220 event pairs, 417 based on Foata normal form. 8/3372 useless extension candidates. Maximal degree in co-relation 20178. Up to 2914 conditions per place. [2024-06-03 18:50:49,278 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 231 selfloop transitions, 64 changer transitions 0/302 dead transitions. [2024-06-03 18:50:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 302 transitions, 4442 flow [2024-06-03 18:50:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 18:50:49,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 18:50:49,279 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3550 flow. Second operand 7 states and 167 transitions. [2024-06-03 18:50:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 302 transitions, 4442 flow [2024-06-03 18:50:49,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 302 transitions, 4332 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:49,620 INFO L231 Difference]: Finished difference. Result has 226 places, 282 transitions, 3630 flow [2024-06-03 18:50:49,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3440, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3630, PETRI_PLACES=226, PETRI_TRANSITIONS=282} [2024-06-03 18:50:49,620 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-03 18:50:49,621 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 282 transitions, 3630 flow [2024-06-03 18:50:49,621 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:49,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:49,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 18:50:49,621 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)] === [2024-06-03 18:50:49,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1000219847, now seen corresponding path program 4 times [2024-06-03 18:50:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:49,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301755576] [2024-06-03 18:50:49,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:49,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:49,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:49,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301755576] [2024-06-03 18:50:49,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301755576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:49,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:49,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:49,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085313855] [2024-06-03 18:50:49,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:49,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:49,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:49,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:49,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:49,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:49,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 282 transitions, 3630 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:49,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:49,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:49,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:50,271 INFO L124 PetriNetUnfolderBase]: 1974/3398 cut-off events. [2024-06-03 18:50:50,271 INFO L125 PetriNetUnfolderBase]: For 142393/142393 co-relation queries the response was YES. [2024-06-03 18:50:50,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20698 conditions, 3398 events. 1974/3398 cut-off events. For 142393/142393 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 21386 event pairs, 396 based on Foata normal form. 2/3397 useless extension candidates. Maximal degree in co-relation 20585. Up to 2900 conditions per place. [2024-06-03 18:50:50,304 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 238 selfloop transitions, 70 changer transitions 0/315 dead transitions. [2024-06-03 18:50:50,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 315 transitions, 4494 flow [2024-06-03 18:50:50,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:50,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 18:50:50,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-03 18:50:50,305 INFO L175 Difference]: Start difference. First operand has 226 places, 282 transitions, 3630 flow. Second operand 6 states and 159 transitions. [2024-06-03 18:50:50,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 315 transitions, 4494 flow [2024-06-03 18:50:50,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 315 transitions, 4354 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:50,560 INFO L231 Difference]: Finished difference. Result has 229 places, 289 transitions, 3786 flow [2024-06-03 18:50:50,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3490, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=229, PETRI_TRANSITIONS=289} [2024-06-03 18:50:50,561 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-03 18:50:50,561 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 289 transitions, 3786 flow [2024-06-03 18:50:50,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:50,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:50,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:50,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 18:50:50,562 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)] === [2024-06-03 18:50:50,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:50,562 INFO L85 PathProgramCache]: Analyzing trace with hash 246786085, now seen corresponding path program 5 times [2024-06-03 18:50:50,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:50,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914229652] [2024-06-03 18:50:50,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:50,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:50,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:50,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:50,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:50,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914229652] [2024-06-03 18:50:50,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914229652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:50,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:50,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:50,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905196779] [2024-06-03 18:50:50,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:50,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:50,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:50,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:50,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:50,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:50,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 289 transitions, 3786 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:50,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:50,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:50,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:51,181 INFO L124 PetriNetUnfolderBase]: 1992/3432 cut-off events. [2024-06-03 18:50:51,182 INFO L125 PetriNetUnfolderBase]: For 151473/151479 co-relation queries the response was YES. [2024-06-03 18:50:51,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21127 conditions, 3432 events. 1992/3432 cut-off events. For 151473/151479 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 21728 event pairs, 429 based on Foata normal form. 6/3432 useless extension candidates. Maximal degree in co-relation 21012. Up to 2821 conditions per place. [2024-06-03 18:50:51,218 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 205 selfloop transitions, 103 changer transitions 0/315 dead transitions. [2024-06-03 18:50:51,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 315 transitions, 4853 flow [2024-06-03 18:50:51,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 18:50:51,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-03 18:50:51,219 INFO L175 Difference]: Start difference. First operand has 229 places, 289 transitions, 3786 flow. Second operand 6 states and 152 transitions. [2024-06-03 18:50:51,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 315 transitions, 4853 flow [2024-06-03 18:50:51,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 315 transitions, 4751 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:51,625 INFO L231 Difference]: Finished difference. Result has 231 places, 296 transitions, 3989 flow [2024-06-03 18:50:51,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3684, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3989, PETRI_PLACES=231, PETRI_TRANSITIONS=296} [2024-06-03 18:50:51,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-03 18:50:51,628 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 296 transitions, 3989 flow [2024-06-03 18:50:51,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:51,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:51,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:51,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 18:50:51,628 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)] === [2024-06-03 18:50:51,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:51,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1101112143, now seen corresponding path program 6 times [2024-06-03 18:50:51,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:51,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108203297] [2024-06-03 18:50:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:51,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:51,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:51,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:51,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108203297] [2024-06-03 18:50:51,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108203297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:51,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:51,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:51,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122668348] [2024-06-03 18:50:51,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:51,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:51,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:51,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:51,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:51,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:51,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 296 transitions, 3989 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:51,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:51,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:51,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:52,258 INFO L124 PetriNetUnfolderBase]: 1986/3425 cut-off events. [2024-06-03 18:50:52,258 INFO L125 PetriNetUnfolderBase]: For 154171/154177 co-relation queries the response was YES. [2024-06-03 18:50:52,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21208 conditions, 3425 events. 1986/3425 cut-off events. For 154171/154177 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 21752 event pairs, 428 based on Foata normal form. 6/3425 useless extension candidates. Maximal degree in co-relation 21092. Up to 2816 conditions per place. [2024-06-03 18:50:52,292 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 208 selfloop transitions, 106 changer transitions 0/321 dead transitions. [2024-06-03 18:50:52,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 321 transitions, 5003 flow [2024-06-03 18:50:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:52,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:52,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-03 18:50:52,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-03 18:50:52,293 INFO L175 Difference]: Start difference. First operand has 231 places, 296 transitions, 3989 flow. Second operand 6 states and 158 transitions. [2024-06-03 18:50:52,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 321 transitions, 5003 flow [2024-06-03 18:50:52,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 321 transitions, 4801 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-03 18:50:52,663 INFO L231 Difference]: Finished difference. Result has 234 places, 296 transitions, 4022 flow [2024-06-03 18:50:52,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4022, PETRI_PLACES=234, PETRI_TRANSITIONS=296} [2024-06-03 18:50:52,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 18:50:52,664 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 296 transitions, 4022 flow [2024-06-03 18:50:52,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:52,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:52,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:52,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 18:50:52,664 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)] === [2024-06-03 18:50:52,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -27023285, now seen corresponding path program 1 times [2024-06-03 18:50:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:52,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114407132] [2024-06-03 18:50:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:52,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:52,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:52,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:52,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114407132] [2024-06-03 18:50:52,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114407132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:52,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:52,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:52,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036869934] [2024-06-03 18:50:52,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:52,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:52,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:52,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:52,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:52,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:52,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 296 transitions, 4022 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) [2024-06-03 18:50:52,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:52,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:52,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:53,315 INFO L124 PetriNetUnfolderBase]: 2015/3464 cut-off events. [2024-06-03 18:50:53,315 INFO L125 PetriNetUnfolderBase]: For 159414/159420 co-relation queries the response was YES. [2024-06-03 18:50:53,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21697 conditions, 3464 events. 2015/3464 cut-off events. For 159414/159420 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21958 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21581. Up to 2978 conditions per place. [2024-06-03 18:50:53,352 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 252 selfloop transitions, 67 changer transitions 0/326 dead transitions. [2024-06-03 18:50:53,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 326 transitions, 5112 flow [2024-06-03 18:50:53,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:53,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:53,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 18:50:53,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5753968253968254 [2024-06-03 18:50:53,353 INFO L175 Difference]: Start difference. First operand has 234 places, 296 transitions, 4022 flow. Second operand 6 states and 145 transitions. [2024-06-03 18:50:53,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 326 transitions, 5112 flow [2024-06-03 18:50:53,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 326 transitions, 4905 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 18:50:53,768 INFO L231 Difference]: Finished difference. Result has 234 places, 308 transitions, 4155 flow [2024-06-03 18:50:53,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3823, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4155, PETRI_PLACES=234, PETRI_TRANSITIONS=308} [2024-06-03 18:50:53,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 18:50:53,769 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 308 transitions, 4155 flow [2024-06-03 18:50:53,769 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) [2024-06-03 18:50:53,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:53,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:53,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 18:50:53,769 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)] === [2024-06-03 18:50:53,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:53,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1596296523, now seen corresponding path program 2 times [2024-06-03 18:50:53,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:53,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418010637] [2024-06-03 18:50:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:53,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418010637] [2024-06-03 18:50:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418010637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:53,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:53,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318923573] [2024-06-03 18:50:53,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:53,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:53,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:53,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:53,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 308 transitions, 4155 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) [2024-06-03 18:50:53,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:53,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:53,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:54,348 INFO L124 PetriNetUnfolderBase]: 2012/3463 cut-off events. [2024-06-03 18:50:54,349 INFO L125 PetriNetUnfolderBase]: For 151476/151482 co-relation queries the response was YES. [2024-06-03 18:50:54,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21405 conditions, 3463 events. 2012/3463 cut-off events. For 151476/151482 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 21891 event pairs, 423 based on Foata normal form. 1/3457 useless extension candidates. Maximal degree in co-relation 21290. Up to 2975 conditions per place. [2024-06-03 18:50:54,384 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 251 selfloop transitions, 71 changer transitions 0/329 dead transitions. [2024-06-03 18:50:54,385 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 329 transitions, 5063 flow [2024-06-03 18:50:54,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:54,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:54,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 18:50:54,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 18:50:54,386 INFO L175 Difference]: Start difference. First operand has 234 places, 308 transitions, 4155 flow. Second operand 6 states and 150 transitions. [2024-06-03 18:50:54,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 329 transitions, 5063 flow [2024-06-03 18:50:54,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 329 transitions, 4933 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-06-03 18:50:54,755 INFO L231 Difference]: Finished difference. Result has 238 places, 308 transitions, 4173 flow [2024-06-03 18:50:54,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4025, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4173, PETRI_PLACES=238, PETRI_TRANSITIONS=308} [2024-06-03 18:50:54,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-03 18:50:54,756 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 308 transitions, 4173 flow [2024-06-03 18:50:54,756 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) [2024-06-03 18:50:54,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:54,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:54,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 18:50:54,756 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)] === [2024-06-03 18:50:54,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:54,757 INFO L85 PathProgramCache]: Analyzing trace with hash -283403825, now seen corresponding path program 3 times [2024-06-03 18:50:54,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:54,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621675941] [2024-06-03 18:50:54,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:54,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:54,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:54,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:54,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621675941] [2024-06-03 18:50:54,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621675941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:54,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:54,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:54,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892036888] [2024-06-03 18:50:54,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:54,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:54,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:54,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:54,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:54,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:54,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 308 transitions, 4173 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) [2024-06-03 18:50:54,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:54,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:54,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:55,567 INFO L124 PetriNetUnfolderBase]: 2017/3474 cut-off events. [2024-06-03 18:50:55,567 INFO L125 PetriNetUnfolderBase]: For 156714/156720 co-relation queries the response was YES. [2024-06-03 18:50:55,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21565 conditions, 3474 events. 2017/3474 cut-off events. For 156714/156720 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 22004 event pairs, 408 based on Foata normal form. 5/3474 useless extension candidates. Maximal degree in co-relation 21449. Up to 3064 conditions per place. [2024-06-03 18:50:55,599 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 285 selfloop transitions, 35 changer transitions 0/327 dead transitions. [2024-06-03 18:50:55,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 327 transitions, 4910 flow [2024-06-03 18:50:55,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:55,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:55,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 18:50:55,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-03 18:50:55,600 INFO L175 Difference]: Start difference. First operand has 238 places, 308 transitions, 4173 flow. Second operand 6 states and 143 transitions. [2024-06-03 18:50:55,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 327 transitions, 4910 flow [2024-06-03 18:50:55,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 327 transitions, 4671 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:55,929 INFO L231 Difference]: Finished difference. Result has 239 places, 311 transitions, 4073 flow [2024-06-03 18:50:55,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3943, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4073, PETRI_PLACES=239, PETRI_TRANSITIONS=311} [2024-06-03 18:50:55,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-03 18:50:55,930 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 311 transitions, 4073 flow [2024-06-03 18:50:55,930 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) [2024-06-03 18:50:55,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:55,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:55,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 18:50:55,931 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)] === [2024-06-03 18:50:55,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:55,931 INFO L85 PathProgramCache]: Analyzing trace with hash -14643125, now seen corresponding path program 4 times [2024-06-03 18:50:55,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:55,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36764846] [2024-06-03 18:50:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:55,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:56,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:56,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36764846] [2024-06-03 18:50:56,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36764846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:56,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:56,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:56,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106765891] [2024-06-03 18:50:56,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:56,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:56,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:56,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:56,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:56,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:56,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 311 transitions, 4073 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) [2024-06-03 18:50:56,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:56,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:56,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:56,518 INFO L124 PetriNetUnfolderBase]: 2014/3464 cut-off events. [2024-06-03 18:50:56,518 INFO L125 PetriNetUnfolderBase]: For 160193/160199 co-relation queries the response was YES. [2024-06-03 18:50:56,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21410 conditions, 3464 events. 2014/3464 cut-off events. For 160193/160199 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 21968 event pairs, 424 based on Foata normal form. 5/3461 useless extension candidates. Maximal degree in co-relation 21294. Up to 2978 conditions per place. [2024-06-03 18:50:56,553 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 249 selfloop transitions, 69 changer transitions 0/325 dead transitions. [2024-06-03 18:50:56,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 325 transitions, 4853 flow [2024-06-03 18:50:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:50:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:50:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 18:50:56,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 18:50:56,554 INFO L175 Difference]: Start difference. First operand has 239 places, 311 transitions, 4073 flow. Second operand 6 states and 141 transitions. [2024-06-03 18:50:56,554 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 325 transitions, 4853 flow [2024-06-03 18:50:56,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 325 transitions, 4755 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:56,974 INFO L231 Difference]: Finished difference. Result has 240 places, 311 transitions, 4119 flow [2024-06-03 18:50:56,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4119, PETRI_PLACES=240, PETRI_TRANSITIONS=311} [2024-06-03 18:50:56,975 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-03 18:50:56,975 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 311 transitions, 4119 flow [2024-06-03 18:50:56,975 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) [2024-06-03 18:50:56,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:56,976 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:56,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 18:50:56,976 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)] === [2024-06-03 18:50:56,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:56,976 INFO L85 PathProgramCache]: Analyzing trace with hash 621287301, now seen corresponding path program 2 times [2024-06-03 18:50:56,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:56,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299023000] [2024-06-03 18:50:56,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:56,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:57,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:57,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299023000] [2024-06-03 18:50:57,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299023000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:57,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:57,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:50:57,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255544402] [2024-06-03 18:50:57,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:57,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:50:57,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:57,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:50:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:50:57,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:57,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 311 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:57,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:57,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:57,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:57,598 INFO L124 PetriNetUnfolderBase]: 2019/3468 cut-off events. [2024-06-03 18:50:57,598 INFO L125 PetriNetUnfolderBase]: For 164246/164246 co-relation queries the response was YES. [2024-06-03 18:50:57,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21641 conditions, 3468 events. 2019/3468 cut-off events. For 164246/164246 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21941 event pairs, 418 based on Foata normal form. 1/3462 useless extension candidates. Maximal degree in co-relation 21525. Up to 3013 conditions per place. [2024-06-03 18:50:57,714 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 259 selfloop transitions, 64 changer transitions 0/330 dead transitions. [2024-06-03 18:50:57,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 5090 flow [2024-06-03 18:50:57,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:57,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 18:50:57,715 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 18:50:57,716 INFO L175 Difference]: Start difference. First operand has 240 places, 311 transitions, 4119 flow. Second operand 7 states and 163 transitions. [2024-06-03 18:50:57,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 5090 flow [2024-06-03 18:50:58,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 330 transitions, 4907 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 18:50:58,140 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 4133 flow [2024-06-03 18:50:58,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3936, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4133, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-03 18:50:58,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-03 18:50:58,141 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 4133 flow [2024-06-03 18:50:58,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:58,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:58,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:58,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 18:50:58,141 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)] === [2024-06-03 18:50:58,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash 82431405, now seen corresponding path program 5 times [2024-06-03 18:50:58,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:58,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744789844] [2024-06-03 18:50:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:58,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:58,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:58,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:58,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744789844] [2024-06-03 18:50:58,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744789844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:58,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:58,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:58,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69774439] [2024-06-03 18:50:58,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:58,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:58,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:58,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:58,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:58,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 4133 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) [2024-06-03 18:50:58,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:58,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:58,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:58,732 INFO L124 PetriNetUnfolderBase]: 2013/3465 cut-off events. [2024-06-03 18:50:58,732 INFO L125 PetriNetUnfolderBase]: For 168760/168766 co-relation queries the response was YES. [2024-06-03 18:50:58,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21467 conditions, 3465 events. 2013/3465 cut-off events. For 168760/168766 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22016 event pairs, 423 based on Foata normal form. 6/3463 useless extension candidates. Maximal degree in co-relation 21351. Up to 2994 conditions per place. [2024-06-03 18:50:58,768 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 59 changer transitions 0/330 dead transitions. [2024-06-03 18:50:58,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 4933 flow [2024-06-03 18:50:58,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:50:58,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:50:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 18:50:58,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-03 18:50:58,769 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 4133 flow. Second operand 5 states and 126 transitions. [2024-06-03 18:50:58,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 4933 flow [2024-06-03 18:50:59,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 330 transitions, 4800 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 18:50:59,197 INFO L231 Difference]: Finished difference. Result has 243 places, 314 transitions, 4132 flow [2024-06-03 18:50:59,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4000, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4132, PETRI_PLACES=243, PETRI_TRANSITIONS=314} [2024-06-03 18:50:59,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-03 18:50:59,198 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 314 transitions, 4132 flow [2024-06-03 18:50:59,198 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) [2024-06-03 18:50:59,198 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:59,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:59,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 18:50:59,198 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)] === [2024-06-03 18:50:59,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:59,198 INFO L85 PathProgramCache]: Analyzing trace with hash 620841645, now seen corresponding path program 6 times [2024-06-03 18:50:59,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:59,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407995058] [2024-06-03 18:50:59,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:59,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:59,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:59,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407995058] [2024-06-03 18:50:59,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407995058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:59,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:59,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:50:59,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521864392] [2024-06-03 18:50:59,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:59,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:50:59,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:59,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:50:59,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:50:59,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:50:59,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 314 transitions, 4132 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) [2024-06-03 18:50:59,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:59,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:50:59,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:59,845 INFO L124 PetriNetUnfolderBase]: 2007/3463 cut-off events. [2024-06-03 18:50:59,845 INFO L125 PetriNetUnfolderBase]: For 169920/169926 co-relation queries the response was YES. [2024-06-03 18:50:59,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21379 conditions, 3463 events. 2007/3463 cut-off events. For 169920/169926 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 22036 event pairs, 407 based on Foata normal form. 6/3464 useless extension candidates. Maximal degree in co-relation 21261. Up to 2988 conditions per place. [2024-06-03 18:50:59,883 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 67 changer transitions 0/340 dead transitions. [2024-06-03 18:50:59,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 340 transitions, 4864 flow [2024-06-03 18:50:59,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:50:59,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:50:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:50:59,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:50:59,884 INFO L175 Difference]: Start difference. First operand has 243 places, 314 transitions, 4132 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:50:59,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 340 transitions, 4864 flow [2024-06-03 18:51:00,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 4693 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:00,435 INFO L231 Difference]: Finished difference. Result has 244 places, 314 transitions, 4112 flow [2024-06-03 18:51:00,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3961, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4112, PETRI_PLACES=244, PETRI_TRANSITIONS=314} [2024-06-03 18:51:00,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-03 18:51:00,435 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 314 transitions, 4112 flow [2024-06-03 18:51:00,435 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) [2024-06-03 18:51:00,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:00,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:00,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 18:51:00,436 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)] === [2024-06-03 18:51:00,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:00,436 INFO L85 PathProgramCache]: Analyzing trace with hash 246791045, now seen corresponding path program 3 times [2024-06-03 18:51:00,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:00,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37061613] [2024-06-03 18:51:00,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:00,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:00,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:00,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37061613] [2024-06-03 18:51:00,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37061613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:00,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:00,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:00,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028660032] [2024-06-03 18:51:00,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:00,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:00,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:00,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:00,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:00,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:00,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 314 transitions, 4112 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:00,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:00,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:00,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:01,268 INFO L124 PetriNetUnfolderBase]: 2004/3459 cut-off events. [2024-06-03 18:51:01,268 INFO L125 PetriNetUnfolderBase]: For 166550/166556 co-relation queries the response was YES. [2024-06-03 18:51:01,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21296 conditions, 3459 events. 2004/3459 cut-off events. For 166550/166556 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21978 event pairs, 414 based on Foata normal form. 5/3459 useless extension candidates. Maximal degree in co-relation 21178. Up to 2994 conditions per place. [2024-06-03 18:51:01,307 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 259 selfloop transitions, 65 changer transitions 0/331 dead transitions. [2024-06-03 18:51:01,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 331 transitions, 4918 flow [2024-06-03 18:51:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:01,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:01,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 18:51:01,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 18:51:01,309 INFO L175 Difference]: Start difference. First operand has 244 places, 314 transitions, 4112 flow. Second operand 6 states and 146 transitions. [2024-06-03 18:51:01,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 331 transitions, 4918 flow [2024-06-03 18:51:01,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 331 transitions, 4762 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:01,675 INFO L231 Difference]: Finished difference. Result has 243 places, 314 transitions, 4100 flow [2024-06-03 18:51:01,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3960, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4100, PETRI_PLACES=243, PETRI_TRANSITIONS=314} [2024-06-03 18:51:01,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-03 18:51:01,676 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 314 transitions, 4100 flow [2024-06-03 18:51:01,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:01,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:01,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:01,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 18:51:01,676 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)] === [2024-06-03 18:51:01,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash 453652805, now seen corresponding path program 4 times [2024-06-03 18:51:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:01,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763926718] [2024-06-03 18:51:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:01,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:01,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:01,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:01,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:01,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763926718] [2024-06-03 18:51:01,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763926718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:01,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:01,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:01,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8621237] [2024-06-03 18:51:01,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:01,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:01,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:01,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:01,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:01,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 314 transitions, 4100 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:01,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:01,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:01,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:02,330 INFO L124 PetriNetUnfolderBase]: 2001/3444 cut-off events. [2024-06-03 18:51:02,330 INFO L125 PetriNetUnfolderBase]: For 159930/159930 co-relation queries the response was YES. [2024-06-03 18:51:02,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21077 conditions, 3444 events. 2001/3444 cut-off events. For 159930/159930 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 21812 event pairs, 417 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 20959. Up to 2991 conditions per place. [2024-06-03 18:51:02,366 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 255 selfloop transitions, 65 changer transitions 0/327 dead transitions. [2024-06-03 18:51:02,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 327 transitions, 4772 flow [2024-06-03 18:51:02,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:02,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:02,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 18:51:02,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 18:51:02,367 INFO L175 Difference]: Start difference. First operand has 243 places, 314 transitions, 4100 flow. Second operand 6 states and 142 transitions. [2024-06-03 18:51:02,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 327 transitions, 4772 flow [2024-06-03 18:51:02,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 327 transitions, 4558 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:02,931 INFO L231 Difference]: Finished difference. Result has 242 places, 314 transitions, 4026 flow [2024-06-03 18:51:02,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4026, PETRI_PLACES=242, PETRI_TRANSITIONS=314} [2024-06-03 18:51:02,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-03 18:51:02,931 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 314 transitions, 4026 flow [2024-06-03 18:51:02,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:02,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:02,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:02,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 18:51:02,932 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)] === [2024-06-03 18:51:02,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:02,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1012718179, now seen corresponding path program 2 times [2024-06-03 18:51:02,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:02,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262972121] [2024-06-03 18:51:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:02,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:03,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:03,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:03,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262972121] [2024-06-03 18:51:03,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262972121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:03,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:03,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:03,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568330877] [2024-06-03 18:51:03,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:03,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:03,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:03,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:03,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:03,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:03,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 314 transitions, 4026 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:03,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:03,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:03,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:03,694 INFO L124 PetriNetUnfolderBase]: 2017/3479 cut-off events. [2024-06-03 18:51:03,694 INFO L125 PetriNetUnfolderBase]: For 164565/164571 co-relation queries the response was YES. [2024-06-03 18:51:03,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21164 conditions, 3479 events. 2017/3479 cut-off events. For 164565/164571 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 22102 event pairs, 416 based on Foata normal form. 8/3482 useless extension candidates. Maximal degree in co-relation 21047. Up to 2991 conditions per place. [2024-06-03 18:51:03,726 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 256 selfloop transitions, 71 changer transitions 0/334 dead transitions. [2024-06-03 18:51:03,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 334 transitions, 4778 flow [2024-06-03 18:51:03,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:03,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:03,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 18:51:03,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 18:51:03,727 INFO L175 Difference]: Start difference. First operand has 242 places, 314 transitions, 4026 flow. Second operand 6 states and 146 transitions. [2024-06-03 18:51:03,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 334 transitions, 4778 flow [2024-06-03 18:51:04,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 334 transitions, 4600 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:04,125 INFO L231 Difference]: Finished difference. Result has 242 places, 317 transitions, 4062 flow [2024-06-03 18:51:04,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3848, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4062, PETRI_PLACES=242, PETRI_TRANSITIONS=317} [2024-06-03 18:51:04,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-03 18:51:04,126 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 317 transitions, 4062 flow [2024-06-03 18:51:04,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:04,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:04,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:04,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 18:51:04,127 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)] === [2024-06-03 18:51:04,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:04,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1000205959, now seen corresponding path program 3 times [2024-06-03 18:51:04,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:04,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683653914] [2024-06-03 18:51:04,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:04,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:04,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:04,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683653914] [2024-06-03 18:51:04,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683653914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:04,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:04,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:04,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217588155] [2024-06-03 18:51:04,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:04,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:04,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:04,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:04,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:04,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:04,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 317 transitions, 4062 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:04,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:04,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:04,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:04,804 INFO L124 PetriNetUnfolderBase]: 2033/3505 cut-off events. [2024-06-03 18:51:04,805 INFO L125 PetriNetUnfolderBase]: For 163727/163727 co-relation queries the response was YES. [2024-06-03 18:51:04,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21494 conditions, 3505 events. 2033/3505 cut-off events. For 163727/163727 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 22272 event pairs, 397 based on Foata normal form. 4/3506 useless extension candidates. Maximal degree in co-relation 21377. Up to 3067 conditions per place. [2024-06-03 18:51:04,843 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 287 selfloop transitions, 46 changer transitions 0/340 dead transitions. [2024-06-03 18:51:04,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 340 transitions, 4840 flow [2024-06-03 18:51:04,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:04,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:04,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 18:51:04,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 18:51:04,844 INFO L175 Difference]: Start difference. First operand has 242 places, 317 transitions, 4062 flow. Second operand 6 states and 149 transitions. [2024-06-03 18:51:04,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 340 transitions, 4840 flow [2024-06-03 18:51:05,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 340 transitions, 4648 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 18:51:05,217 INFO L231 Difference]: Finished difference. Result has 244 places, 320 transitions, 4036 flow [2024-06-03 18:51:05,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3876, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4036, PETRI_PLACES=244, PETRI_TRANSITIONS=320} [2024-06-03 18:51:05,218 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-03 18:51:05,218 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 320 transitions, 4036 flow [2024-06-03 18:51:05,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:05,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:05,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:05,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 18:51:05,219 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)] === [2024-06-03 18:51:05,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:05,219 INFO L85 PathProgramCache]: Analyzing trace with hash 690133763, now seen corresponding path program 4 times [2024-06-03 18:51:05,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:05,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210504464] [2024-06-03 18:51:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:05,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:05,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:05,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:05,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210504464] [2024-06-03 18:51:05,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210504464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:05,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:05,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:05,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342740211] [2024-06-03 18:51:05,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:05,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:05,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:05,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:05,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:05,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:05,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 320 transitions, 4036 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:05,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:05,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:05,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:05,886 INFO L124 PetriNetUnfolderBase]: 2065/3559 cut-off events. [2024-06-03 18:51:05,886 INFO L125 PetriNetUnfolderBase]: For 166951/166951 co-relation queries the response was YES. [2024-06-03 18:51:05,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21810 conditions, 3559 events. 2065/3559 cut-off events. For 166951/166951 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 22634 event pairs, 396 based on Foata normal form. 4/3560 useless extension candidates. Maximal degree in co-relation 21692. Up to 3060 conditions per place. [2024-06-03 18:51:05,923 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 294 selfloop transitions, 44 changer transitions 0/345 dead transitions. [2024-06-03 18:51:05,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 345 transitions, 4990 flow [2024-06-03 18:51:05,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:05,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 18:51:05,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 18:51:05,924 INFO L175 Difference]: Start difference. First operand has 244 places, 320 transitions, 4036 flow. Second operand 6 states and 147 transitions. [2024-06-03 18:51:05,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 345 transitions, 4990 flow [2024-06-03 18:51:06,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 345 transitions, 4852 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 18:51:06,434 INFO L231 Difference]: Finished difference. Result has 247 places, 326 transitions, 4129 flow [2024-06-03 18:51:06,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3898, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4129, PETRI_PLACES=247, PETRI_TRANSITIONS=326} [2024-06-03 18:51:06,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-03 18:51:06,435 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 326 transitions, 4129 flow [2024-06-03 18:51:06,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:06,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:06,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:06,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 18:51:06,435 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)] === [2024-06-03 18:51:06,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:06,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1377285683, now seen corresponding path program 1 times [2024-06-03 18:51:06,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:06,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487596620] [2024-06-03 18:51:06,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:06,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:06,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:06,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:06,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487596620] [2024-06-03 18:51:06,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487596620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:06,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:06,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:06,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203718821] [2024-06-03 18:51:06,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:06,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:06,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:06,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:06,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:06,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:06,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 326 transitions, 4129 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:06,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:06,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:06,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:07,113 INFO L124 PetriNetUnfolderBase]: 2094/3600 cut-off events. [2024-06-03 18:51:07,113 INFO L125 PetriNetUnfolderBase]: For 179641/179641 co-relation queries the response was YES. [2024-06-03 18:51:07,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22403 conditions, 3600 events. 2094/3600 cut-off events. For 179641/179641 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 22948 event pairs, 374 based on Foata normal form. 4/3596 useless extension candidates. Maximal degree in co-relation 22283. Up to 3024 conditions per place. [2024-06-03 18:51:07,149 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 83 changer transitions 0/355 dead transitions. [2024-06-03 18:51:07,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 355 transitions, 5105 flow [2024-06-03 18:51:07,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 18:51:07,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 18:51:07,150 INFO L175 Difference]: Start difference. First operand has 247 places, 326 transitions, 4129 flow. Second operand 7 states and 170 transitions. [2024-06-03 18:51:07,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 355 transitions, 5105 flow [2024-06-03 18:51:07,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 355 transitions, 4982 flow, removed 41 selfloop flow, removed 2 redundant places. [2024-06-03 18:51:07,479 INFO L231 Difference]: Finished difference. Result has 252 places, 332 transitions, 4292 flow [2024-06-03 18:51:07,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4006, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4292, PETRI_PLACES=252, PETRI_TRANSITIONS=332} [2024-06-03 18:51:07,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-03 18:51:07,480 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 332 transitions, 4292 flow [2024-06-03 18:51:07,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:07,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:07,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:07,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 18:51:07,480 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)] === [2024-06-03 18:51:07,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:07,481 INFO L85 PathProgramCache]: Analyzing trace with hash -35646355, now seen corresponding path program 2 times [2024-06-03 18:51:07,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:07,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267053145] [2024-06-03 18:51:07,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:07,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:07,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:07,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:07,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267053145] [2024-06-03 18:51:07,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267053145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:07,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:07,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:07,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543455293] [2024-06-03 18:51:07,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:07,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:07,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:07,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:07,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:07,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:07,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 332 transitions, 4292 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:07,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:07,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:07,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:08,266 INFO L124 PetriNetUnfolderBase]: 2110/3619 cut-off events. [2024-06-03 18:51:08,267 INFO L125 PetriNetUnfolderBase]: For 184785/184785 co-relation queries the response was YES. [2024-06-03 18:51:08,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22768 conditions, 3619 events. 2110/3619 cut-off events. For 184785/184785 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 23067 event pairs, 431 based on Foata normal form. 4/3615 useless extension candidates. Maximal degree in co-relation 22646. Up to 3116 conditions per place. [2024-06-03 18:51:08,308 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/353 dead transitions. [2024-06-03 18:51:08,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 353 transitions, 5088 flow [2024-06-03 18:51:08,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:08,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:08,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 18:51:08,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 18:51:08,309 INFO L175 Difference]: Start difference. First operand has 252 places, 332 transitions, 4292 flow. Second operand 7 states and 165 transitions. [2024-06-03 18:51:08,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 353 transitions, 5088 flow [2024-06-03 18:51:08,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 353 transitions, 4898 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-03 18:51:08,684 INFO L231 Difference]: Finished difference. Result has 256 places, 335 transitions, 4330 flow [2024-06-03 18:51:08,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4128, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4330, PETRI_PLACES=256, PETRI_TRANSITIONS=335} [2024-06-03 18:51:08,685 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-03 18:51:08,685 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 335 transitions, 4330 flow [2024-06-03 18:51:08,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:08,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:08,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 18:51:08,686 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)] === [2024-06-03 18:51:08,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash 82441325, now seen corresponding path program 3 times [2024-06-03 18:51:08,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:08,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113303291] [2024-06-03 18:51:08,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:08,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:08,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113303291] [2024-06-03 18:51:08,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113303291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:08,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:08,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:08,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169554018] [2024-06-03 18:51:08,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:08,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:08,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:08,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:08,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:08,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:08,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 335 transitions, 4330 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:08,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:08,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:08,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:09,463 INFO L124 PetriNetUnfolderBase]: 2126/3648 cut-off events. [2024-06-03 18:51:09,463 INFO L125 PetriNetUnfolderBase]: For 189509/189509 co-relation queries the response was YES. [2024-06-03 18:51:09,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22941 conditions, 3648 events. 2126/3648 cut-off events. For 189509/189509 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 23264 event pairs, 415 based on Foata normal form. 4/3645 useless extension candidates. Maximal degree in co-relation 22817. Up to 3215 conditions per place. [2024-06-03 18:51:09,503 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 307 selfloop transitions, 39 changer transitions 0/353 dead transitions. [2024-06-03 18:51:09,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 353 transitions, 5098 flow [2024-06-03 18:51:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:09,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:09,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 18:51:09,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.54421768707483 [2024-06-03 18:51:09,504 INFO L175 Difference]: Start difference. First operand has 256 places, 335 transitions, 4330 flow. Second operand 7 states and 160 transitions. [2024-06-03 18:51:09,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 353 transitions, 5098 flow [2024-06-03 18:51:09,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 353 transitions, 4924 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 18:51:09,945 INFO L231 Difference]: Finished difference. Result has 258 places, 338 transitions, 4286 flow [2024-06-03 18:51:09,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4156, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4286, PETRI_PLACES=258, PETRI_TRANSITIONS=338} [2024-06-03 18:51:09,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-03 18:51:09,946 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 338 transitions, 4286 flow [2024-06-03 18:51:09,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:09,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:09,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:09,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 18:51:09,946 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)] === [2024-06-03 18:51:09,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:09,947 INFO L85 PathProgramCache]: Analyzing trace with hash 82626023, now seen corresponding path program 1 times [2024-06-03 18:51:09,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:09,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989350494] [2024-06-03 18:51:09,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:10,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:10,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:10,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989350494] [2024-06-03 18:51:10,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989350494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:10,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:10,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:10,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833815818] [2024-06-03 18:51:10,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:10,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:10,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:10,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:10,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:10,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:10,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 338 transitions, 4286 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:10,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:10,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:10,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:10,621 INFO L124 PetriNetUnfolderBase]: 2142/3671 cut-off events. [2024-06-03 18:51:10,621 INFO L125 PetriNetUnfolderBase]: For 195566/195566 co-relation queries the response was YES. [2024-06-03 18:51:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23123 conditions, 3671 events. 2142/3671 cut-off events. For 195566/195566 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23394 event pairs, 424 based on Foata normal form. 4/3668 useless extension candidates. Maximal degree in co-relation 22998. Up to 3190 conditions per place. [2024-06-03 18:51:10,663 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 67 changer transitions 0/356 dead transitions. [2024-06-03 18:51:10,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 356 transitions, 5086 flow [2024-06-03 18:51:10,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:10,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 18:51:10,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-03 18:51:10,665 INFO L175 Difference]: Start difference. First operand has 258 places, 338 transitions, 4286 flow. Second operand 7 states and 162 transitions. [2024-06-03 18:51:10,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 356 transitions, 5086 flow [2024-06-03 18:51:11,078 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 356 transitions, 4984 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 18:51:11,083 INFO L231 Difference]: Finished difference. Result has 260 places, 341 transitions, 4396 flow [2024-06-03 18:51:11,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4184, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4396, PETRI_PLACES=260, PETRI_TRANSITIONS=341} [2024-06-03 18:51:11,083 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-03 18:51:11,083 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 341 transitions, 4396 flow [2024-06-03 18:51:11,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:11,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:11,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 18:51:11,084 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)] === [2024-06-03 18:51:11,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash 612740723, now seen corresponding path program 4 times [2024-06-03 18:51:11,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:11,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048539768] [2024-06-03 18:51:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:11,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:11,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:11,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:11,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:11,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048539768] [2024-06-03 18:51:11,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048539768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:11,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:11,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:11,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185913454] [2024-06-03 18:51:11,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:11,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:11,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:11,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:11,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:11,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 341 transitions, 4396 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:11,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:11,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:11,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:11,831 INFO L124 PetriNetUnfolderBase]: 2132/3663 cut-off events. [2024-06-03 18:51:11,831 INFO L125 PetriNetUnfolderBase]: For 194226/194226 co-relation queries the response was YES. [2024-06-03 18:51:11,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23017 conditions, 3663 events. 2132/3663 cut-off events. For 194226/194226 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 23406 event pairs, 358 based on Foata normal form. 4/3660 useless extension candidates. Maximal degree in co-relation 22891. Up to 3115 conditions per place. [2024-06-03 18:51:11,870 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 282 selfloop transitions, 76 changer transitions 0/365 dead transitions. [2024-06-03 18:51:11,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 365 transitions, 5172 flow [2024-06-03 18:51:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:11,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:51:11,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 18:51:11,871 INFO L175 Difference]: Start difference. First operand has 260 places, 341 transitions, 4396 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:51:11,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 365 transitions, 5172 flow [2024-06-03 18:51:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 365 transitions, 4966 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 18:51:12,223 INFO L231 Difference]: Finished difference. Result has 262 places, 341 transitions, 4357 flow [2024-06-03 18:51:12,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4357, PETRI_PLACES=262, PETRI_TRANSITIONS=341} [2024-06-03 18:51:12,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-03 18:51:12,223 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 341 transitions, 4357 flow [2024-06-03 18:51:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:12,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:12,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 18:51:12,224 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)] === [2024-06-03 18:51:12,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 681569827, now seen corresponding path program 2 times [2024-06-03 18:51:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124862742] [2024-06-03 18:51:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:12,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:12,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:12,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:12,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124862742] [2024-06-03 18:51:12,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124862742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:12,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:12,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:12,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254869819] [2024-06-03 18:51:12,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:12,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:12,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:12,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:12,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:12,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:12,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 341 transitions, 4357 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:12,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:12,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:12,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:12,932 INFO L124 PetriNetUnfolderBase]: 2148/3689 cut-off events. [2024-06-03 18:51:12,932 INFO L125 PetriNetUnfolderBase]: For 197518/197518 co-relation queries the response was YES. [2024-06-03 18:51:12,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23179 conditions, 3689 events. 2148/3689 cut-off events. For 197518/197518 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 23499 event pairs, 400 based on Foata normal form. 4/3690 useless extension candidates. Maximal degree in co-relation 23052. Up to 3240 conditions per place. [2024-06-03 18:51:12,974 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 46 changer transitions 0/364 dead transitions. [2024-06-03 18:51:12,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 364 transitions, 5161 flow [2024-06-03 18:51:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:12,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:12,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 18:51:12,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-03 18:51:12,975 INFO L175 Difference]: Start difference. First operand has 262 places, 341 transitions, 4357 flow. Second operand 6 states and 149 transitions. [2024-06-03 18:51:12,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 364 transitions, 5161 flow [2024-06-03 18:51:13,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 364 transitions, 4997 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:13,331 INFO L231 Difference]: Finished difference. Result has 262 places, 344 transitions, 4337 flow [2024-06-03 18:51:13,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4193, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4337, PETRI_PLACES=262, PETRI_TRANSITIONS=344} [2024-06-03 18:51:13,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-03 18:51:13,331 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 344 transitions, 4337 flow [2024-06-03 18:51:13,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:13,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:13,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:13,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 18:51:13,332 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)] === [2024-06-03 18:51:13,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:13,332 INFO L85 PathProgramCache]: Analyzing trace with hash 453668677, now seen corresponding path program 3 times [2024-06-03 18:51:13,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:13,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135811277] [2024-06-03 18:51:13,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:13,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:13,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:13,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:13,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135811277] [2024-06-03 18:51:13,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135811277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:13,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:13,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:13,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851826929] [2024-06-03 18:51:13,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:13,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:13,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:13,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:13,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:13,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:13,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 344 transitions, 4337 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:13,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:13,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:13,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:14,204 INFO L124 PetriNetUnfolderBase]: 2151/3686 cut-off events. [2024-06-03 18:51:14,204 INFO L125 PetriNetUnfolderBase]: For 195644/195644 co-relation queries the response was YES. [2024-06-03 18:51:14,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23018 conditions, 3686 events. 2151/3686 cut-off events. For 195644/195644 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23505 event pairs, 425 based on Foata normal form. 4/3683 useless extension candidates. Maximal degree in co-relation 22890. Up to 3193 conditions per place. [2024-06-03 18:51:14,255 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 283 selfloop transitions, 71 changer transitions 0/361 dead transitions. [2024-06-03 18:51:14,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 361 transitions, 5151 flow [2024-06-03 18:51:14,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:14,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:14,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 18:51:14,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-03 18:51:14,256 INFO L175 Difference]: Start difference. First operand has 262 places, 344 transitions, 4337 flow. Second operand 6 states and 143 transitions. [2024-06-03 18:51:14,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 361 transitions, 5151 flow [2024-06-03 18:51:14,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 361 transitions, 5039 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 18:51:14,675 INFO L231 Difference]: Finished difference. Result has 264 places, 347 transitions, 4455 flow [2024-06-03 18:51:14,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4455, PETRI_PLACES=264, PETRI_TRANSITIONS=347} [2024-06-03 18:51:14,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-03 18:51:14,675 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 347 transitions, 4455 flow [2024-06-03 18:51:14,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:14,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:14,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:14,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 18:51:14,676 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)] === [2024-06-03 18:51:14,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:14,676 INFO L85 PathProgramCache]: Analyzing trace with hash 460163797, now seen corresponding path program 4 times [2024-06-03 18:51:14,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:14,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723860095] [2024-06-03 18:51:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:14,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:14,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:14,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:14,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:14,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723860095] [2024-06-03 18:51:14,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723860095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:14,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:14,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:14,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813034247] [2024-06-03 18:51:14,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:14,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:14,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:14,834 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:14,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 347 transitions, 4455 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:14,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:14,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:14,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:15,383 INFO L124 PetriNetUnfolderBase]: 2138/3666 cut-off events. [2024-06-03 18:51:15,383 INFO L125 PetriNetUnfolderBase]: For 191708/191708 co-relation queries the response was YES. [2024-06-03 18:51:15,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22871 conditions, 3666 events. 2138/3666 cut-off events. For 191708/191708 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 23317 event pairs, 394 based on Foata normal form. 4/3667 useless extension candidates. Maximal degree in co-relation 22742. Up to 3168 conditions per place. [2024-06-03 18:51:15,426 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 311 selfloop transitions, 47 changer transitions 0/365 dead transitions. [2024-06-03 18:51:15,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 365 transitions, 5215 flow [2024-06-03 18:51:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:15,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 18:51:15,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-03 18:51:15,427 INFO L175 Difference]: Start difference. First operand has 264 places, 347 transitions, 4455 flow. Second operand 6 states and 146 transitions. [2024-06-03 18:51:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 365 transitions, 5215 flow [2024-06-03 18:51:15,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 365 transitions, 4995 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 18:51:15,981 INFO L231 Difference]: Finished difference. Result has 266 places, 347 transitions, 4337 flow [2024-06-03 18:51:15,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4337, PETRI_PLACES=266, PETRI_TRANSITIONS=347} [2024-06-03 18:51:15,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-03 18:51:15,981 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 347 transitions, 4337 flow [2024-06-03 18:51:15,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:15,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:15,981 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] [2024-06-03 18:51:15,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 18:51:15,982 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)] === [2024-06-03 18:51:15,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1064643134, now seen corresponding path program 1 times [2024-06-03 18:51:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:15,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479368690] [2024-06-03 18:51:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:15,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:16,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:16,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479368690] [2024-06-03 18:51:16,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479368690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:16,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:16,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:16,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417166925] [2024-06-03 18:51:16,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:16,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:16,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:16,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:16,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:16,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:16,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 347 transitions, 4337 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:16,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:16,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:16,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:16,729 INFO L124 PetriNetUnfolderBase]: 2151/3690 cut-off events. [2024-06-03 18:51:16,729 INFO L125 PetriNetUnfolderBase]: For 187827/187833 co-relation queries the response was YES. [2024-06-03 18:51:16,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22754 conditions, 3690 events. 2151/3690 cut-off events. For 187827/187833 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 23551 event pairs, 418 based on Foata normal form. 5/3690 useless extension candidates. Maximal degree in co-relation 22624. Up to 3204 conditions per place. [2024-06-03 18:51:16,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 73 changer transitions 0/374 dead transitions. [2024-06-03 18:51:16,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 374 transitions, 5333 flow [2024-06-03 18:51:16,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:51:16,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:51:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 18:51:16,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5214285714285715 [2024-06-03 18:51:16,770 INFO L175 Difference]: Start difference. First operand has 266 places, 347 transitions, 4337 flow. Second operand 10 states and 219 transitions. [2024-06-03 18:51:16,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 374 transitions, 5333 flow [2024-06-03 18:51:17,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 374 transitions, 5220 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 18:51:17,287 INFO L231 Difference]: Finished difference. Result has 272 places, 353 transitions, 4477 flow [2024-06-03 18:51:17,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4224, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=274, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4477, PETRI_PLACES=272, PETRI_TRANSITIONS=353} [2024-06-03 18:51:17,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-03 18:51:17,288 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 353 transitions, 4477 flow [2024-06-03 18:51:17,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:17,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:17,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:17,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 18:51:17,288 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)] === [2024-06-03 18:51:17,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:17,289 INFO L85 PathProgramCache]: Analyzing trace with hash -837720534, now seen corresponding path program 2 times [2024-06-03 18:51:17,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:17,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639885609] [2024-06-03 18:51:17,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:17,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:17,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:17,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639885609] [2024-06-03 18:51:17,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639885609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:17,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:17,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:17,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908767048] [2024-06-03 18:51:17,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:17,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:17,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:17,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:17,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:17,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:17,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 353 transitions, 4477 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:17,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:17,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:17,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:17,936 INFO L124 PetriNetUnfolderBase]: 2180/3734 cut-off events. [2024-06-03 18:51:17,936 INFO L125 PetriNetUnfolderBase]: For 201338/201344 co-relation queries the response was YES. [2024-06-03 18:51:17,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23366 conditions, 3734 events. 2180/3734 cut-off events. For 201338/201344 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 23842 event pairs, 443 based on Foata normal form. 5/3731 useless extension candidates. Maximal degree in co-relation 23234. Up to 3077 conditions per place. [2024-06-03 18:51:17,975 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 240 selfloop transitions, 137 changer transitions 0/384 dead transitions. [2024-06-03 18:51:17,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 384 transitions, 5723 flow [2024-06-03 18:51:17,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:17,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 18:51:17,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.564625850340136 [2024-06-03 18:51:17,976 INFO L175 Difference]: Start difference. First operand has 272 places, 353 transitions, 4477 flow. Second operand 7 states and 166 transitions. [2024-06-03 18:51:17,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 384 transitions, 5723 flow [2024-06-03 18:51:18,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 384 transitions, 5538 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:18,575 INFO L231 Difference]: Finished difference. Result has 272 places, 365 transitions, 4758 flow [2024-06-03 18:51:18,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4758, PETRI_PLACES=272, PETRI_TRANSITIONS=365} [2024-06-03 18:51:18,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-03 18:51:18,575 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 365 transitions, 4758 flow [2024-06-03 18:51:18,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:18,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:18,576 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] [2024-06-03 18:51:18,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 18:51:18,576 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)] === [2024-06-03 18:51:18,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:18,576 INFO L85 PathProgramCache]: Analyzing trace with hash 123051628, now seen corresponding path program 3 times [2024-06-03 18:51:18,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:18,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781589705] [2024-06-03 18:51:18,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:18,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:18,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:18,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781589705] [2024-06-03 18:51:18,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781589705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:18,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:18,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:18,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608293501] [2024-06-03 18:51:18,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:18,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:18,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:18,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:18,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:18,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:18,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 365 transitions, 4758 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:18,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:18,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:18,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:19,490 INFO L124 PetriNetUnfolderBase]: 2177/3734 cut-off events. [2024-06-03 18:51:19,490 INFO L125 PetriNetUnfolderBase]: For 203880/203886 co-relation queries the response was YES. [2024-06-03 18:51:19,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23500 conditions, 3734 events. 2177/3734 cut-off events. For 203880/203886 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 23876 event pairs, 448 based on Foata normal form. 1/3728 useless extension candidates. Maximal degree in co-relation 23367. Up to 3074 conditions per place. [2024-06-03 18:51:19,537 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 238 selfloop transitions, 143 changer transitions 0/388 dead transitions. [2024-06-03 18:51:19,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 388 transitions, 5972 flow [2024-06-03 18:51:19,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:19,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:19,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 18:51:19,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 18:51:19,538 INFO L175 Difference]: Start difference. First operand has 272 places, 365 transitions, 4758 flow. Second operand 7 states and 172 transitions. [2024-06-03 18:51:19,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 388 transitions, 5972 flow [2024-06-03 18:51:20,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 388 transitions, 5759 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 18:51:20,139 INFO L231 Difference]: Finished difference. Result has 276 places, 365 transitions, 4837 flow [2024-06-03 18:51:20,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4837, PETRI_PLACES=276, PETRI_TRANSITIONS=365} [2024-06-03 18:51:20,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-03 18:51:20,139 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 365 transitions, 4837 flow [2024-06-03 18:51:20,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:20,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:20,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:20,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 18:51:20,140 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)] === [2024-06-03 18:51:20,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:20,140 INFO L85 PathProgramCache]: Analyzing trace with hash -619396338, now seen corresponding path program 4 times [2024-06-03 18:51:20,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:20,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443396465] [2024-06-03 18:51:20,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:20,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:20,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:20,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:20,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:20,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443396465] [2024-06-03 18:51:20,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443396465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:20,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:20,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:20,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249721221] [2024-06-03 18:51:20,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:20,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:20,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:20,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:20,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:20,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:20,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 365 transitions, 4837 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:20,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:20,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:20,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:20,913 INFO L124 PetriNetUnfolderBase]: 2182/3727 cut-off events. [2024-06-03 18:51:20,914 INFO L125 PetriNetUnfolderBase]: For 210850/210850 co-relation queries the response was YES. [2024-06-03 18:51:20,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23659 conditions, 3727 events. 2182/3727 cut-off events. For 210850/210850 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 23775 event pairs, 446 based on Foata normal form. 1/3720 useless extension candidates. Maximal degree in co-relation 23525. Up to 3080 conditions per place. [2024-06-03 18:51:20,955 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 234 selfloop transitions, 147 changer transitions 0/388 dead transitions. [2024-06-03 18:51:20,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 5966 flow [2024-06-03 18:51:20,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:20,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 18:51:20,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 18:51:20,956 INFO L175 Difference]: Start difference. First operand has 276 places, 365 transitions, 4837 flow. Second operand 8 states and 188 transitions. [2024-06-03 18:51:20,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 5966 flow [2024-06-03 18:51:21,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 388 transitions, 5503 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:21,599 INFO L231 Difference]: Finished difference. Result has 278 places, 368 transitions, 4725 flow [2024-06-03 18:51:21,599 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4383, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4725, PETRI_PLACES=278, PETRI_TRANSITIONS=368} [2024-06-03 18:51:21,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-03 18:51:21,600 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 368 transitions, 4725 flow [2024-06-03 18:51:21,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:21,600 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:21,600 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] [2024-06-03 18:51:21,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 18:51:21,600 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)] === [2024-06-03 18:51:21,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1562947692, now seen corresponding path program 5 times [2024-06-03 18:51:21,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:21,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415170051] [2024-06-03 18:51:21,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:21,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:21,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415170051] [2024-06-03 18:51:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415170051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:21,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:21,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:21,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977685526] [2024-06-03 18:51:21,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:21,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:21,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:21,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:21,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 368 transitions, 4725 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:21,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:21,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:21,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:22,343 INFO L124 PetriNetUnfolderBase]: 2187/3754 cut-off events. [2024-06-03 18:51:22,344 INFO L125 PetriNetUnfolderBase]: For 213963/213969 co-relation queries the response was YES. [2024-06-03 18:51:22,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23725 conditions, 3754 events. 2187/3754 cut-off events. For 213963/213969 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24088 event pairs, 419 based on Foata normal form. 5/3754 useless extension candidates. Maximal degree in co-relation 23591. Up to 3256 conditions per place. [2024-06-03 18:51:22,409 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 311 selfloop transitions, 73 changer transitions 0/391 dead transitions. [2024-06-03 18:51:22,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 391 transitions, 5713 flow [2024-06-03 18:51:22,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:51:22,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:51:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 18:51:22,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 18:51:22,410 INFO L175 Difference]: Start difference. First operand has 278 places, 368 transitions, 4725 flow. Second operand 9 states and 201 transitions. [2024-06-03 18:51:22,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 391 transitions, 5713 flow [2024-06-03 18:51:23,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 391 transitions, 5474 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 18:51:23,248 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4674 flow [2024-06-03 18:51:23,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4489, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4674, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-03 18:51:23,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-03 18:51:23,248 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4674 flow [2024-06-03 18:51:23,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:23,249 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:23,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:23,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 18:51:23,249 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)] === [2024-06-03 18:51:23,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:23,249 INFO L85 PathProgramCache]: Analyzing trace with hash -453935574, now seen corresponding path program 6 times [2024-06-03 18:51:23,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:23,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933675808] [2024-06-03 18:51:23,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:23,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:23,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:23,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933675808] [2024-06-03 18:51:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933675808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:23,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:23,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838798956] [2024-06-03 18:51:23,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:23,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:23,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:23,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:23,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4674 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:23,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:23,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:23,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:23,987 INFO L124 PetriNetUnfolderBase]: 2184/3744 cut-off events. [2024-06-03 18:51:23,987 INFO L125 PetriNetUnfolderBase]: For 218807/218813 co-relation queries the response was YES. [2024-06-03 18:51:24,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23502 conditions, 3744 events. 2184/3744 cut-off events. For 218807/218813 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 23979 event pairs, 443 based on Foata normal form. 5/3741 useless extension candidates. Maximal degree in co-relation 23366. Up to 3083 conditions per place. [2024-06-03 18:51:24,029 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 242 selfloop transitions, 137 changer transitions 0/386 dead transitions. [2024-06-03 18:51:24,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 386 transitions, 5606 flow [2024-06-03 18:51:24,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:24,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:24,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 18:51:24,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 18:51:24,030 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4674 flow. Second operand 7 states and 163 transitions. [2024-06-03 18:51:24,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 386 transitions, 5606 flow [2024-06-03 18:51:24,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 386 transitions, 5454 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:24,831 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4802 flow [2024-06-03 18:51:24,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4802, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-03 18:51:24,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-03 18:51:24,831 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4802 flow [2024-06-03 18:51:24,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:24,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:24,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:24,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 18:51:24,831 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)] === [2024-06-03 18:51:24,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:24,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1209614874, now seen corresponding path program 7 times [2024-06-03 18:51:24,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:24,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294337364] [2024-06-03 18:51:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:24,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:24,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:24,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294337364] [2024-06-03 18:51:24,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294337364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:24,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:24,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:24,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812324588] [2024-06-03 18:51:24,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:24,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:24,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:24,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:24,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:24,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:24,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4802 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:24,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:24,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:24,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:25,541 INFO L124 PetriNetUnfolderBase]: 2181/3746 cut-off events. [2024-06-03 18:51:25,541 INFO L125 PetriNetUnfolderBase]: For 221418/221424 co-relation queries the response was YES. [2024-06-03 18:51:25,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23679 conditions, 3746 events. 2181/3746 cut-off events. For 221418/221424 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 24044 event pairs, 419 based on Foata normal form. 5/3746 useless extension candidates. Maximal degree in co-relation 23542. Up to 3249 conditions per place. [2024-06-03 18:51:25,583 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 72 changer transitions 0/388 dead transitions. [2024-06-03 18:51:25,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 388 transitions, 5606 flow [2024-06-03 18:51:25,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:51:25,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:51:25,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 18:51:25,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 18:51:25,584 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4802 flow. Second operand 7 states and 165 transitions. [2024-06-03 18:51:25,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 388 transitions, 5606 flow [2024-06-03 18:51:26,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 388 transitions, 5163 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:26,276 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4509 flow [2024-06-03 18:51:26,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4359, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4509, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-03 18:51:26,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-03 18:51:26,277 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4509 flow [2024-06-03 18:51:26,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:26,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:26,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:26,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 18:51:26,277 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)] === [2024-06-03 18:51:26,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:26,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2066228692, now seen corresponding path program 8 times [2024-06-03 18:51:26,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:26,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676664347] [2024-06-03 18:51:26,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:26,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:26,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:26,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:26,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676664347] [2024-06-03 18:51:26,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676664347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:26,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:26,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:26,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135214765] [2024-06-03 18:51:26,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:26,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:26,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:26,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:26,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:26,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:26,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4509 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:26,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:26,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:26,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:27,045 INFO L124 PetriNetUnfolderBase]: 2202/3781 cut-off events. [2024-06-03 18:51:27,045 INFO L125 PetriNetUnfolderBase]: For 230413/230419 co-relation queries the response was YES. [2024-06-03 18:51:27,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23757 conditions, 3781 events. 2202/3781 cut-off events. For 230413/230419 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24289 event pairs, 419 based on Foata normal form. 5/3781 useless extension candidates. Maximal degree in co-relation 23621. Up to 3137 conditions per place. [2024-06-03 18:51:27,085 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 151 changer transitions 0/408 dead transitions. [2024-06-03 18:51:27,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 408 transitions, 5934 flow [2024-06-03 18:51:27,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:51:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:51:27,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 18:51:27,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 18:51:27,086 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4509 flow. Second operand 9 states and 213 transitions. [2024-06-03 18:51:27,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 408 transitions, 5934 flow [2024-06-03 18:51:27,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 408 transitions, 5790 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:27,824 INFO L231 Difference]: Finished difference. Result has 285 places, 380 transitions, 4806 flow [2024-06-03 18:51:27,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4365, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4806, PETRI_PLACES=285, PETRI_TRANSITIONS=380} [2024-06-03 18:51:27,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-03 18:51:27,824 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 380 transitions, 4806 flow [2024-06-03 18:51:27,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:27,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:27,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:27,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 18:51:27,825 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)] === [2024-06-03 18:51:27,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 2066223112, now seen corresponding path program 9 times [2024-06-03 18:51:27,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:27,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600131883] [2024-06-03 18:51:27,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:27,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:27,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:27,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600131883] [2024-06-03 18:51:27,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600131883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:27,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:27,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:27,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405945850] [2024-06-03 18:51:27,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:27,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:27,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:27,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:27,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:27,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:27,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 380 transitions, 4806 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:27,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:27,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:27,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:28,520 INFO L124 PetriNetUnfolderBase]: 2199/3777 cut-off events. [2024-06-03 18:51:28,521 INFO L125 PetriNetUnfolderBase]: For 234361/234367 co-relation queries the response was YES. [2024-06-03 18:51:28,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23984 conditions, 3777 events. 2199/3777 cut-off events. For 234361/234367 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24239 event pairs, 419 based on Foata normal form. 5/3777 useless extension candidates. Maximal degree in co-relation 23847. Up to 3134 conditions per place. [2024-06-03 18:51:28,564 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 257 selfloop transitions, 146 changer transitions 0/410 dead transitions. [2024-06-03 18:51:28,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 410 transitions, 6118 flow [2024-06-03 18:51:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:28,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 18:51:28,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-03 18:51:28,565 INFO L175 Difference]: Start difference. First operand has 285 places, 380 transitions, 4806 flow. Second operand 8 states and 199 transitions. [2024-06-03 18:51:28,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 410 transitions, 6118 flow [2024-06-03 18:51:29,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 410 transitions, 5748 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:29,388 INFO L231 Difference]: Finished difference. Result has 286 places, 380 transitions, 4745 flow [2024-06-03 18:51:29,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4442, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4745, PETRI_PLACES=286, PETRI_TRANSITIONS=380} [2024-06-03 18:51:29,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 18:51:29,389 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 380 transitions, 4745 flow [2024-06-03 18:51:29,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:29,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:29,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:29,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 18:51:29,390 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)] === [2024-06-03 18:51:29,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2074497322, now seen corresponding path program 10 times [2024-06-03 18:51:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928600705] [2024-06-03 18:51:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:29,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:29,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:29,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:29,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928600705] [2024-06-03 18:51:29,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928600705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:29,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:29,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:29,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246822707] [2024-06-03 18:51:29,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:29,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:29,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:29,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:29,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:29,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 380 transitions, 4745 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:29,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:29,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:29,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:30,069 INFO L124 PetriNetUnfolderBase]: 2196/3767 cut-off events. [2024-06-03 18:51:30,069 INFO L125 PetriNetUnfolderBase]: For 232597/232603 co-relation queries the response was YES. [2024-06-03 18:51:30,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23813 conditions, 3767 events. 2196/3767 cut-off events. For 232597/232603 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 24208 event pairs, 443 based on Foata normal form. 5/3764 useless extension candidates. Maximal degree in co-relation 23676. Up to 3131 conditions per place. [2024-06-03 18:51:30,114 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 130 changer transitions 0/398 dead transitions. [2024-06-03 18:51:30,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 398 transitions, 5859 flow [2024-06-03 18:51:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:30,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 18:51:30,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 18:51:30,115 INFO L175 Difference]: Start difference. First operand has 286 places, 380 transitions, 4745 flow. Second operand 6 states and 148 transitions. [2024-06-03 18:51:30,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 398 transitions, 5859 flow [2024-06-03 18:51:30,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 398 transitions, 5541 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:30,958 INFO L231 Difference]: Finished difference. Result has 285 places, 380 transitions, 4698 flow [2024-06-03 18:51:30,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4431, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4698, PETRI_PLACES=285, PETRI_TRANSITIONS=380} [2024-06-03 18:51:30,959 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-03 18:51:30,959 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 380 transitions, 4698 flow [2024-06-03 18:51:30,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:30,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:30,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:30,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 18:51:30,959 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)] === [2024-06-03 18:51:30,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2080038262, now seen corresponding path program 11 times [2024-06-03 18:51:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:30,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320955350] [2024-06-03 18:51:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:30,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:31,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:31,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320955350] [2024-06-03 18:51:31,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320955350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:31,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:31,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:31,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010542226] [2024-06-03 18:51:31,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:31,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:31,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:31,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:31,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:31,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:31,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 380 transitions, 4698 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:31,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:31,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:31,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:31,732 INFO L124 PetriNetUnfolderBase]: 2209/3784 cut-off events. [2024-06-03 18:51:31,732 INFO L125 PetriNetUnfolderBase]: For 234028/234028 co-relation queries the response was YES. [2024-06-03 18:51:31,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23956 conditions, 3784 events. 2209/3784 cut-off events. For 234028/234028 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 24265 event pairs, 421 based on Foata normal form. 1/3778 useless extension candidates. Maximal degree in co-relation 23819. Up to 3270 conditions per place. [2024-06-03 18:51:31,777 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 316 selfloop transitions, 82 changer transitions 0/405 dead transitions. [2024-06-03 18:51:31,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 405 transitions, 5772 flow [2024-06-03 18:51:31,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:51:31,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:51:31,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 18:51:31,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5108225108225108 [2024-06-03 18:51:31,778 INFO L175 Difference]: Start difference. First operand has 285 places, 380 transitions, 4698 flow. Second operand 11 states and 236 transitions. [2024-06-03 18:51:31,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 405 transitions, 5772 flow [2024-06-03 18:51:32,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 405 transitions, 5490 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:51:32,509 INFO L231 Difference]: Finished difference. Result has 292 places, 386 transitions, 4693 flow [2024-06-03 18:51:32,509 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4428, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4693, PETRI_PLACES=292, PETRI_TRANSITIONS=386} [2024-06-03 18:51:32,510 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-03 18:51:32,510 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 386 transitions, 4693 flow [2024-06-03 18:51:32,510 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:32,510 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:32,510 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:32,510 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 18:51:32,510 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)] === [2024-06-03 18:51:32,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:32,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1739146970, now seen corresponding path program 12 times [2024-06-03 18:51:32,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:32,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229213465] [2024-06-03 18:51:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:32,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:32,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:32,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:32,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229213465] [2024-06-03 18:51:32,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229213465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:32,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:32,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:32,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059945830] [2024-06-03 18:51:32,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:32,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:32,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:32,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:32,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:32,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:32,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 386 transitions, 4693 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:32,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:32,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:32,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:33,294 INFO L124 PetriNetUnfolderBase]: 2214/3792 cut-off events. [2024-06-03 18:51:33,294 INFO L125 PetriNetUnfolderBase]: For 239656/239656 co-relation queries the response was YES. [2024-06-03 18:51:33,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23973 conditions, 3792 events. 2214/3792 cut-off events. For 239656/239656 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24365 event pairs, 422 based on Foata normal form. 1/3786 useless extension candidates. Maximal degree in co-relation 23834. Up to 3283 conditions per place. [2024-06-03 18:51:33,336 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 319 selfloop transitions, 78 changer transitions 0/404 dead transitions. [2024-06-03 18:51:33,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 404 transitions, 5571 flow [2024-06-03 18:51:33,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 18:51:33,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 18:51:33,337 INFO L175 Difference]: Start difference. First operand has 292 places, 386 transitions, 4693 flow. Second operand 8 states and 182 transitions. [2024-06-03 18:51:33,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 404 transitions, 5571 flow [2024-06-03 18:51:34,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 404 transitions, 5353 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-03 18:51:34,113 INFO L231 Difference]: Finished difference. Result has 292 places, 389 transitions, 4691 flow [2024-06-03 18:51:34,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4496, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4691, PETRI_PLACES=292, PETRI_TRANSITIONS=389} [2024-06-03 18:51:34,113 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 249 predicate places. [2024-06-03 18:51:34,113 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 389 transitions, 4691 flow [2024-06-03 18:51:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:34,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:34,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:34,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 18:51:34,114 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)] === [2024-06-03 18:51:34,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:34,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1733784590, now seen corresponding path program 13 times [2024-06-03 18:51:34,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:34,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234388358] [2024-06-03 18:51:34,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:34,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:34,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:34,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:34,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:34,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234388358] [2024-06-03 18:51:34,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234388358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:34,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:34,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:34,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053199205] [2024-06-03 18:51:34,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:34,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:34,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:34,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:34,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 389 transitions, 4691 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:34,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:34,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:34,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:35,030 INFO L124 PetriNetUnfolderBase]: 2211/3789 cut-off events. [2024-06-03 18:51:35,031 INFO L125 PetriNetUnfolderBase]: For 242626/242626 co-relation queries the response was YES. [2024-06-03 18:51:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23895 conditions, 3789 events. 2211/3789 cut-off events. For 242626/242626 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24359 event pairs, 421 based on Foata normal form. 1/3783 useless extension candidates. Maximal degree in co-relation 23755. Up to 3273 conditions per place. [2024-06-03 18:51:35,067 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 317 selfloop transitions, 85 changer transitions 0/409 dead transitions. [2024-06-03 18:51:35,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 409 transitions, 5541 flow [2024-06-03 18:51:35,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:51:35,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:51:35,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-03 18:51:35,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981684981684982 [2024-06-03 18:51:35,068 INFO L175 Difference]: Start difference. First operand has 292 places, 389 transitions, 4691 flow. Second operand 13 states and 272 transitions. [2024-06-03 18:51:35,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 409 transitions, 5541 flow [2024-06-03 18:51:35,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 409 transitions, 5377 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:35,885 INFO L231 Difference]: Finished difference. Result has 299 places, 389 transitions, 4703 flow [2024-06-03 18:51:35,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4703, PETRI_PLACES=299, PETRI_TRANSITIONS=389} [2024-06-03 18:51:35,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-03 18:51:35,886 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 389 transitions, 4703 flow [2024-06-03 18:51:35,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:35,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:35,886 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] [2024-06-03 18:51:35,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 18:51:35,886 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)] === [2024-06-03 18:51:35,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:35,886 INFO L85 PathProgramCache]: Analyzing trace with hash -698183360, now seen corresponding path program 14 times [2024-06-03 18:51:35,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:35,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436092126] [2024-06-03 18:51:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:35,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:36,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:36,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436092126] [2024-06-03 18:51:36,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436092126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:36,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:36,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:36,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72496280] [2024-06-03 18:51:36,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:36,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:36,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:36,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:36,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:36,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:36,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 389 transitions, 4703 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:36,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:36,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:36,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:36,656 INFO L124 PetriNetUnfolderBase]: 2208/3785 cut-off events. [2024-06-03 18:51:36,656 INFO L125 PetriNetUnfolderBase]: For 245715/245715 co-relation queries the response was YES. [2024-06-03 18:51:36,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23887 conditions, 3785 events. 2208/3785 cut-off events. For 245715/245715 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24331 event pairs, 420 based on Foata normal form. 1/3779 useless extension candidates. Maximal degree in co-relation 23746. Up to 3146 conditions per place. [2024-06-03 18:51:36,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 158 changer transitions 0/416 dead transitions. [2024-06-03 18:51:36,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 416 transitions, 6035 flow [2024-06-03 18:51:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:51:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:51:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-03 18:51:36,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-03 18:51:36,701 INFO L175 Difference]: Start difference. First operand has 299 places, 389 transitions, 4703 flow. Second operand 11 states and 247 transitions. [2024-06-03 18:51:36,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 416 transitions, 6035 flow [2024-06-03 18:51:37,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 416 transitions, 5855 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-03 18:51:37,676 INFO L231 Difference]: Finished difference. Result has 298 places, 389 transitions, 4849 flow [2024-06-03 18:51:37,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4523, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4849, PETRI_PLACES=298, PETRI_TRANSITIONS=389} [2024-06-03 18:51:37,677 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-03 18:51:37,677 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 389 transitions, 4849 flow [2024-06-03 18:51:37,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:37,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:37,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:37,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 18:51:37,677 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)] === [2024-06-03 18:51:37,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:37,678 INFO L85 PathProgramCache]: Analyzing trace with hash -939411082, now seen corresponding path program 15 times [2024-06-03 18:51:37,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:37,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686739972] [2024-06-03 18:51:37,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:37,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:37,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:37,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:37,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:37,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686739972] [2024-06-03 18:51:37,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686739972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:37,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:37,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:37,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975978472] [2024-06-03 18:51:37,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:37,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:37,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:37,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:37,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:37,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:37,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 389 transitions, 4849 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:37,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:37,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:37,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:38,489 INFO L124 PetriNetUnfolderBase]: 2205/3792 cut-off events. [2024-06-03 18:51:38,489 INFO L125 PetriNetUnfolderBase]: For 249500/249506 co-relation queries the response was YES. [2024-06-03 18:51:38,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24076 conditions, 3792 events. 2205/3792 cut-off events. For 249500/249506 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 24417 event pairs, 417 based on Foata normal form. 5/3792 useless extension candidates. Maximal degree in co-relation 23934. Up to 3143 conditions per place. [2024-06-03 18:51:38,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 160 changer transitions 0/416 dead transitions. [2024-06-03 18:51:38,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 416 transitions, 5885 flow [2024-06-03 18:51:38,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:51:38,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:51:38,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-03 18:51:38,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5452380952380952 [2024-06-03 18:51:38,535 INFO L175 Difference]: Start difference. First operand has 298 places, 389 transitions, 4849 flow. Second operand 10 states and 229 transitions. [2024-06-03 18:51:38,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 416 transitions, 5885 flow [2024-06-03 18:51:39,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 416 transitions, 5585 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:39,530 INFO L231 Difference]: Finished difference. Result has 301 places, 389 transitions, 4881 flow [2024-06-03 18:51:39,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4551, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4881, PETRI_PLACES=301, PETRI_TRANSITIONS=389} [2024-06-03 18:51:39,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 258 predicate places. [2024-06-03 18:51:39,530 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 389 transitions, 4881 flow [2024-06-03 18:51:39,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:39,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:39,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:39,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 18:51:39,531 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)] === [2024-06-03 18:51:39,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:39,531 INFO L85 PathProgramCache]: Analyzing trace with hash -703278830, now seen corresponding path program 16 times [2024-06-03 18:51:39,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:39,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321072321] [2024-06-03 18:51:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:39,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:39,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:39,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:39,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:39,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321072321] [2024-06-03 18:51:39,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321072321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:39,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:39,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:39,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753144370] [2024-06-03 18:51:39,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:39,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:39,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:39,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:39,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:39,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:39,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 389 transitions, 4881 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:39,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:39,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:39,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:40,298 INFO L124 PetriNetUnfolderBase]: 2210/3789 cut-off events. [2024-06-03 18:51:40,298 INFO L125 PetriNetUnfolderBase]: For 249752/249752 co-relation queries the response was YES. [2024-06-03 18:51:40,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24103 conditions, 3789 events. 2210/3789 cut-off events. For 249752/249752 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24380 event pairs, 422 based on Foata normal form. 1/3783 useless extension candidates. Maximal degree in co-relation 23960. Up to 3149 conditions per place. [2024-06-03 18:51:40,341 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 249 selfloop transitions, 158 changer transitions 0/414 dead transitions. [2024-06-03 18:51:40,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 414 transitions, 5937 flow [2024-06-03 18:51:40,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:40,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:40,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 18:51:40,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-03 18:51:40,342 INFO L175 Difference]: Start difference. First operand has 301 places, 389 transitions, 4881 flow. Second operand 8 states and 190 transitions. [2024-06-03 18:51:40,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 414 transitions, 5937 flow [2024-06-03 18:51:41,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 414 transitions, 5559 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 18:51:41,211 INFO L231 Difference]: Finished difference. Result has 300 places, 392 transitions, 4867 flow [2024-06-03 18:51:41,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4867, PETRI_PLACES=300, PETRI_TRANSITIONS=392} [2024-06-03 18:51:41,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-03 18:51:41,212 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 392 transitions, 4867 flow [2024-06-03 18:51:41,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:41,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:41,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:41,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 18:51:41,212 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)] === [2024-06-03 18:51:41,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1178343622, now seen corresponding path program 17 times [2024-06-03 18:51:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:41,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076604799] [2024-06-03 18:51:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:41,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:41,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076604799] [2024-06-03 18:51:41,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076604799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:41,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:41,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:41,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549195162] [2024-06-03 18:51:41,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:41,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:41,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:41,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:41,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:41,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 392 transitions, 4867 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:41,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:41,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:41,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:42,015 INFO L124 PetriNetUnfolderBase]: 2207/3786 cut-off events. [2024-06-03 18:51:42,016 INFO L125 PetriNetUnfolderBase]: For 246446/246446 co-relation queries the response was YES. [2024-06-03 18:51:42,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23960 conditions, 3786 events. 2207/3786 cut-off events. For 246446/246446 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24372 event pairs, 420 based on Foata normal form. 1/3780 useless extension candidates. Maximal degree in co-relation 23816. Up to 3146 conditions per place. [2024-06-03 18:51:42,065 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 161 changer transitions 0/419 dead transitions. [2024-06-03 18:51:42,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 419 transitions, 5907 flow [2024-06-03 18:51:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:51:42,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:51:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 282 transitions. [2024-06-03 18:51:42,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5164835164835165 [2024-06-03 18:51:42,066 INFO L175 Difference]: Start difference. First operand has 300 places, 392 transitions, 4867 flow. Second operand 13 states and 282 transitions. [2024-06-03 18:51:42,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 419 transitions, 5907 flow [2024-06-03 18:51:43,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 419 transitions, 5642 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:43,131 INFO L231 Difference]: Finished difference. Result has 307 places, 392 transitions, 4936 flow [2024-06-03 18:51:43,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4604, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4936, PETRI_PLACES=307, PETRI_TRANSITIONS=392} [2024-06-03 18:51:43,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-03 18:51:43,132 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 392 transitions, 4936 flow [2024-06-03 18:51:43,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:43,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:43,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:43,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 18:51:43,132 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)] === [2024-06-03 18:51:43,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:43,133 INFO L85 PathProgramCache]: Analyzing trace with hash -346395850, now seen corresponding path program 18 times [2024-06-03 18:51:43,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:43,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265657242] [2024-06-03 18:51:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:43,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:43,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:43,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:43,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265657242] [2024-06-03 18:51:43,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265657242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:43,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:43,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:43,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304936552] [2024-06-03 18:51:43,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:43,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:43,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:43,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:43,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:43,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 392 transitions, 4936 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:43,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:43,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:43,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:43,941 INFO L124 PetriNetUnfolderBase]: 2204/3791 cut-off events. [2024-06-03 18:51:43,941 INFO L125 PetriNetUnfolderBase]: For 242139/242139 co-relation queries the response was YES. [2024-06-03 18:51:43,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23911 conditions, 3791 events. 2204/3791 cut-off events. For 242139/242139 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24389 event pairs, 398 based on Foata normal form. 1/3789 useless extension candidates. Maximal degree in co-relation 23767. Up to 3288 conditions per place. [2024-06-03 18:51:43,980 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 353 selfloop transitions, 56 changer transitions 0/416 dead transitions. [2024-06-03 18:51:43,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 416 transitions, 5994 flow [2024-06-03 18:51:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:43,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 18:51:43,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-03 18:51:43,981 INFO L175 Difference]: Start difference. First operand has 307 places, 392 transitions, 4936 flow. Second operand 6 states and 155 transitions. [2024-06-03 18:51:43,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 416 transitions, 5994 flow [2024-06-03 18:51:45,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 416 transitions, 5584 flow, removed 5 selfloop flow, removed 14 redundant places. [2024-06-03 18:51:45,023 INFO L231 Difference]: Finished difference. Result has 300 places, 393 transitions, 4710 flow [2024-06-03 18:51:45,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4531, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4710, PETRI_PLACES=300, PETRI_TRANSITIONS=393} [2024-06-03 18:51:45,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-03 18:51:45,024 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 393 transitions, 4710 flow [2024-06-03 18:51:45,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:45,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:45,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:45,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 18:51:45,024 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)] === [2024-06-03 18:51:45,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:45,025 INFO L85 PathProgramCache]: Analyzing trace with hash -346662760, now seen corresponding path program 19 times [2024-06-03 18:51:45,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:45,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921918299] [2024-06-03 18:51:45,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:45,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:45,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:45,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921918299] [2024-06-03 18:51:45,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921918299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:45,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:45,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:51:45,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761142217] [2024-06-03 18:51:45,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:45,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:51:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:51:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:51:45,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:45,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 393 transitions, 4710 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:45,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:45,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:45,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:45,761 INFO L124 PetriNetUnfolderBase]: 2201/3787 cut-off events. [2024-06-03 18:51:45,761 INFO L125 PetriNetUnfolderBase]: For 238590/238590 co-relation queries the response was YES. [2024-06-03 18:51:45,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23617 conditions, 3787 events. 2201/3787 cut-off events. For 238590/238590 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24395 event pairs, 398 based on Foata normal form. 1/3785 useless extension candidates. Maximal degree in co-relation 23472. Up to 3285 conditions per place. [2024-06-03 18:51:45,804 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 349 selfloop transitions, 59 changer transitions 0/415 dead transitions. [2024-06-03 18:51:45,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 415 transitions, 5582 flow [2024-06-03 18:51:45,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:51:45,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:51:45,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 18:51:45,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-03 18:51:45,806 INFO L175 Difference]: Start difference. First operand has 300 places, 393 transitions, 4710 flow. Second operand 6 states and 155 transitions. [2024-06-03 18:51:45,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 415 transitions, 5582 flow [2024-06-03 18:51:46,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 415 transitions, 5495 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:51:46,788 INFO L231 Difference]: Finished difference. Result has 303 places, 393 transitions, 4755 flow [2024-06-03 18:51:46,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4623, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4755, PETRI_PLACES=303, PETRI_TRANSITIONS=393} [2024-06-03 18:51:46,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-03 18:51:46,788 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 393 transitions, 4755 flow [2024-06-03 18:51:46,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:46,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:46,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:46,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 18:51:46,789 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)] === [2024-06-03 18:51:46,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:46,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1106909654, now seen corresponding path program 1 times [2024-06-03 18:51:46,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:46,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537317840] [2024-06-03 18:51:46,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:46,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:46,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:46,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:46,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537317840] [2024-06-03 18:51:46,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537317840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:46,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:46,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:46,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479602846] [2024-06-03 18:51:46,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:46,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:46,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:46,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:46,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:46,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:46,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 393 transitions, 4755 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:46,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:46,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:46,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:47,549 INFO L124 PetriNetUnfolderBase]: 2320/3979 cut-off events. [2024-06-03 18:51:47,550 INFO L125 PetriNetUnfolderBase]: For 324868/324868 co-relation queries the response was YES. [2024-06-03 18:51:47,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26046 conditions, 3979 events. 2320/3979 cut-off events. For 324868/324868 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 25817 event pairs, 447 based on Foata normal form. 12/3983 useless extension candidates. Maximal degree in co-relation 25900. Up to 2982 conditions per place. [2024-06-03 18:51:47,597 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 235 selfloop transitions, 185 changer transitions 0/427 dead transitions. [2024-06-03 18:51:47,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 5939 flow [2024-06-03 18:51:47,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:47,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:47,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 18:51:47,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 18:51:47,598 INFO L175 Difference]: Start difference. First operand has 303 places, 393 transitions, 4755 flow. Second operand 8 states and 196 transitions. [2024-06-03 18:51:47,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 5939 flow [2024-06-03 18:51:48,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 427 transitions, 5656 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:51:48,650 INFO L231 Difference]: Finished difference. Result has 303 places, 397 transitions, 4947 flow [2024-06-03 18:51:48,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4947, PETRI_PLACES=303, PETRI_TRANSITIONS=397} [2024-06-03 18:51:48,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-03 18:51:48,651 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 397 transitions, 4947 flow [2024-06-03 18:51:48,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:48,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:48,651 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] [2024-06-03 18:51:48,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 18:51:48,652 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)] === [2024-06-03 18:51:48,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:48,652 INFO L85 PathProgramCache]: Analyzing trace with hash -250154076, now seen corresponding path program 2 times [2024-06-03 18:51:48,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:48,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295597839] [2024-06-03 18:51:48,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:48,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:48,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:48,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:48,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:48,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295597839] [2024-06-03 18:51:48,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295597839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:48,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:48,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:48,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718315877] [2024-06-03 18:51:48,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:48,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:48,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:48,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:48,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:48,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:48,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 397 transitions, 4947 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:48,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:48,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:48,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:49,498 INFO L124 PetriNetUnfolderBase]: 2452/4178 cut-off events. [2024-06-03 18:51:49,498 INFO L125 PetriNetUnfolderBase]: For 387078/387078 co-relation queries the response was YES. [2024-06-03 18:51:49,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29149 conditions, 4178 events. 2452/4178 cut-off events. For 387078/387078 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 27142 event pairs, 518 based on Foata normal form. 12/4182 useless extension candidates. Maximal degree in co-relation 29002. Up to 3336 conditions per place. [2024-06-03 18:51:49,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 177 changer transitions 0/427 dead transitions. [2024-06-03 18:51:49,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 427 transitions, 6131 flow [2024-06-03 18:51:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:49,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 18:51:49,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-03 18:51:49,553 INFO L175 Difference]: Start difference. First operand has 303 places, 397 transitions, 4947 flow. Second operand 8 states and 193 transitions. [2024-06-03 18:51:49,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 427 transitions, 6131 flow [2024-06-03 18:51:50,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 427 transitions, 5870 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 18:51:50,711 INFO L231 Difference]: Finished difference. Result has 307 places, 401 transitions, 5153 flow [2024-06-03 18:51:50,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5153, PETRI_PLACES=307, PETRI_TRANSITIONS=401} [2024-06-03 18:51:50,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-03 18:51:50,712 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 401 transitions, 5153 flow [2024-06-03 18:51:50,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:50,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:50,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:50,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 18:51:50,712 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)] === [2024-06-03 18:51:50,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1018196024, now seen corresponding path program 3 times [2024-06-03 18:51:50,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:50,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093277938] [2024-06-03 18:51:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:50,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:50,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:50,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:50,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093277938] [2024-06-03 18:51:50,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093277938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:50,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:50,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:50,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462338563] [2024-06-03 18:51:50,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:50,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:50,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:50,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:50,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:50,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:50,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 401 transitions, 5153 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:50,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:50,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:50,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:51,650 INFO L124 PetriNetUnfolderBase]: 2416/4126 cut-off events. [2024-06-03 18:51:51,650 INFO L125 PetriNetUnfolderBase]: For 356277/356277 co-relation queries the response was YES. [2024-06-03 18:51:51,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27789 conditions, 4126 events. 2416/4126 cut-off events. For 356277/356277 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26871 event pairs, 514 based on Foata normal form. 16/4134 useless extension candidates. Maximal degree in co-relation 27640. Up to 3380 conditions per place. [2024-06-03 18:51:51,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 243 selfloop transitions, 173 changer transitions 0/423 dead transitions. [2024-06-03 18:51:51,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 423 transitions, 6053 flow [2024-06-03 18:51:51,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:51,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 18:51:51,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 18:51:51,703 INFO L175 Difference]: Start difference. First operand has 307 places, 401 transitions, 5153 flow. Second operand 8 states and 189 transitions. [2024-06-03 18:51:51,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 423 transitions, 6053 flow [2024-06-03 18:51:52,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 423 transitions, 5798 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 18:51:52,761 INFO L231 Difference]: Finished difference. Result has 311 places, 401 transitions, 5250 flow [2024-06-03 18:51:52,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4898, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5250, PETRI_PLACES=311, PETRI_TRANSITIONS=401} [2024-06-03 18:51:52,761 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-03 18:51:52,761 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 401 transitions, 5250 flow [2024-06-03 18:51:52,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:52,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:52,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:52,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 18:51:52,762 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)] === [2024-06-03 18:51:52,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:52,762 INFO L85 PathProgramCache]: Analyzing trace with hash -971091382, now seen corresponding path program 4 times [2024-06-03 18:51:52,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:52,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998249989] [2024-06-03 18:51:52,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:52,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:52,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:52,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998249989] [2024-06-03 18:51:52,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998249989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:52,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:52,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:52,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030466243] [2024-06-03 18:51:52,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:52,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:52,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:52,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:52,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:52,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:52,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 401 transitions, 5250 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:52,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:52,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:52,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:53,723 INFO L124 PetriNetUnfolderBase]: 2472/4230 cut-off events. [2024-06-03 18:51:53,723 INFO L125 PetriNetUnfolderBase]: For 363555/363555 co-relation queries the response was YES. [2024-06-03 18:51:53,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28589 conditions, 4230 events. 2472/4230 cut-off events. For 363555/363555 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27663 event pairs, 493 based on Foata normal form. 16/4239 useless extension candidates. Maximal degree in co-relation 28438. Up to 3630 conditions per place. [2024-06-03 18:51:53,780 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 337 selfloop transitions, 78 changer transitions 0/422 dead transitions. [2024-06-03 18:51:53,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 422 transitions, 6190 flow [2024-06-03 18:51:53,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:53,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:53,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 18:51:53,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-03 18:51:53,781 INFO L175 Difference]: Start difference. First operand has 311 places, 401 transitions, 5250 flow. Second operand 8 states and 185 transitions. [2024-06-03 18:51:53,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 422 transitions, 6190 flow [2024-06-03 18:51:54,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 422 transitions, 5836 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:51:54,993 INFO L231 Difference]: Finished difference. Result has 312 places, 403 transitions, 5112 flow [2024-06-03 18:51:54,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5112, PETRI_PLACES=312, PETRI_TRANSITIONS=403} [2024-06-03 18:51:54,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-03 18:51:54,994 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 403 transitions, 5112 flow [2024-06-03 18:51:54,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:54,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:54,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:54,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 18:51:54,994 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)] === [2024-06-03 18:51:54,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:54,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1739284920, now seen corresponding path program 5 times [2024-06-03 18:51:54,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:54,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144437811] [2024-06-03 18:51:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:54,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:55,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:55,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144437811] [2024-06-03 18:51:55,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144437811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:55,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:55,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:55,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54115682] [2024-06-03 18:51:55,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:55,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:55,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:55,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 403 transitions, 5112 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:55,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:55,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:55,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:55,886 INFO L124 PetriNetUnfolderBase]: 2604/4434 cut-off events. [2024-06-03 18:51:55,886 INFO L125 PetriNetUnfolderBase]: For 416092/416092 co-relation queries the response was YES. [2024-06-03 18:51:55,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31222 conditions, 4434 events. 2604/4434 cut-off events. For 416092/416092 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 29165 event pairs, 513 based on Foata normal form. 12/4439 useless extension candidates. Maximal degree in co-relation 31070. Up to 3674 conditions per place. [2024-06-03 18:51:55,944 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 84 changer transitions 0/430 dead transitions. [2024-06-03 18:51:55,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 430 transitions, 6304 flow [2024-06-03 18:51:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:51:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:51:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 18:51:55,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-03 18:51:55,945 INFO L175 Difference]: Start difference. First operand has 312 places, 403 transitions, 5112 flow. Second operand 8 states and 188 transitions. [2024-06-03 18:51:55,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 430 transitions, 6304 flow [2024-06-03 18:51:57,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 430 transitions, 6124 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 18:51:57,277 INFO L231 Difference]: Finished difference. Result has 314 places, 407 transitions, 5217 flow [2024-06-03 18:51:57,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4932, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5217, PETRI_PLACES=314, PETRI_TRANSITIONS=407} [2024-06-03 18:51:57,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-03 18:51:57,278 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 407 transitions, 5217 flow [2024-06-03 18:51:57,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:57,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:57,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:57,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 18:51:57,278 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)] === [2024-06-03 18:51:57,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:57,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1733774670, now seen corresponding path program 6 times [2024-06-03 18:51:57,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:57,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561289818] [2024-06-03 18:51:57,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:57,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:57,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:57,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:57,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561289818] [2024-06-03 18:51:57,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561289818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:57,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:57,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:57,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292194235] [2024-06-03 18:51:57,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:57,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:57,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:57,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:57,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:57,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 407 transitions, 5217 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:57,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:57,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:57,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:51:58,217 INFO L124 PetriNetUnfolderBase]: 2568/4382 cut-off events. [2024-06-03 18:51:58,217 INFO L125 PetriNetUnfolderBase]: For 384402/384402 co-relation queries the response was YES. [2024-06-03 18:51:58,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29604 conditions, 4382 events. 2568/4382 cut-off events. For 384402/384402 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 28864 event pairs, 509 based on Foata normal form. 16/4391 useless extension candidates. Maximal degree in co-relation 29451. Up to 3782 conditions per place. [2024-06-03 18:51:58,272 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 79 changer transitions 0/428 dead transitions. [2024-06-03 18:51:58,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 428 transitions, 6123 flow [2024-06-03 18:51:58,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:51:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:51:58,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-03 18:51:58,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261904761904762 [2024-06-03 18:51:58,273 INFO L175 Difference]: Start difference. First operand has 314 places, 407 transitions, 5217 flow. Second operand 10 states and 221 transitions. [2024-06-03 18:51:58,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 428 transitions, 6123 flow [2024-06-03 18:51:59,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 428 transitions, 5968 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 18:51:59,490 INFO L231 Difference]: Finished difference. Result has 320 places, 407 transitions, 5226 flow [2024-06-03 18:51:59,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5062, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5226, PETRI_PLACES=320, PETRI_TRANSITIONS=407} [2024-06-03 18:51:59,491 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 18:51:59,491 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 407 transitions, 5226 flow [2024-06-03 18:51:59,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:59,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:59,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:59,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 18:51:59,491 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)] === [2024-06-03 18:51:59,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:59,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1733559468, now seen corresponding path program 1 times [2024-06-03 18:51:59,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:59,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496339747] [2024-06-03 18:51:59,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:59,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:59,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:59,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:59,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496339747] [2024-06-03 18:51:59,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496339747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:59,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:59,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:51:59,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914884006] [2024-06-03 18:51:59,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:59,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:51:59,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:51:59,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:51:59,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:51:59,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 407 transitions, 5226 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:59,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:59,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:51:59,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:00,425 INFO L124 PetriNetUnfolderBase]: 2608/4454 cut-off events. [2024-06-03 18:52:00,426 INFO L125 PetriNetUnfolderBase]: For 376541/376541 co-relation queries the response was YES. [2024-06-03 18:52:00,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29978 conditions, 4454 events. 2608/4454 cut-off events. For 376541/376541 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 29367 event pairs, 511 based on Foata normal form. 12/4459 useless extension candidates. Maximal degree in co-relation 29823. Up to 3722 conditions per place. [2024-06-03 18:52:00,480 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 86 changer transitions 0/433 dead transitions. [2024-06-03 18:52:00,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 433 transitions, 6208 flow [2024-06-03 18:52:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:52:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:52:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 223 transitions. [2024-06-03 18:52:00,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.530952380952381 [2024-06-03 18:52:00,481 INFO L175 Difference]: Start difference. First operand has 320 places, 407 transitions, 5226 flow. Second operand 10 states and 223 transitions. [2024-06-03 18:52:00,481 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 433 transitions, 6208 flow [2024-06-03 18:52:01,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 433 transitions, 6034 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 18:52:01,713 INFO L231 Difference]: Finished difference. Result has 321 places, 409 transitions, 5285 flow [2024-06-03 18:52:01,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5052, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=407, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5285, PETRI_PLACES=321, PETRI_TRANSITIONS=409} [2024-06-03 18:52:01,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-03 18:52:01,713 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 409 transitions, 5285 flow [2024-06-03 18:52:01,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:01,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:01,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:01,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 18:52:01,713 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)] === [2024-06-03 18:52:01,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:01,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1173250632, now seen corresponding path program 7 times [2024-06-03 18:52:01,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:01,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715614834] [2024-06-03 18:52:01,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:01,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:01,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:01,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715614834] [2024-06-03 18:52:01,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715614834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:01,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:01,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:01,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629325530] [2024-06-03 18:52:01,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:01,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:01,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:01,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:01,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:01,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:01,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 409 transitions, 5285 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:01,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:01,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:01,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:02,629 INFO L124 PetriNetUnfolderBase]: 2664/4542 cut-off events. [2024-06-03 18:52:02,629 INFO L125 PetriNetUnfolderBase]: For 403003/403003 co-relation queries the response was YES. [2024-06-03 18:52:02,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30814 conditions, 4542 events. 2664/4542 cut-off events. For 403003/403003 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 30064 event pairs, 529 based on Foata normal form. 16/4551 useless extension candidates. Maximal degree in co-relation 30658. Up to 3741 conditions per place. [2024-06-03 18:52:02,686 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 163 changer transitions 0/436 dead transitions. [2024-06-03 18:52:02,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 436 transitions, 6277 flow [2024-06-03 18:52:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:52:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:52:02,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 18:52:02,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 18:52:02,687 INFO L175 Difference]: Start difference. First operand has 321 places, 409 transitions, 5285 flow. Second operand 8 states and 192 transitions. [2024-06-03 18:52:02,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 436 transitions, 6277 flow [2024-06-03 18:52:04,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 436 transitions, 6070 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 18:52:04,020 INFO L231 Difference]: Finished difference. Result has 321 places, 411 transitions, 5476 flow [2024-06-03 18:52:04,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5078, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5476, PETRI_PLACES=321, PETRI_TRANSITIONS=411} [2024-06-03 18:52:04,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-03 18:52:04,021 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 411 transitions, 5476 flow [2024-06-03 18:52:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:04,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:04,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:04,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 18:52:04,021 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)] === [2024-06-03 18:52:04,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:04,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1178613012, now seen corresponding path program 8 times [2024-06-03 18:52:04,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:04,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678470746] [2024-06-03 18:52:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:04,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:04,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:04,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678470746] [2024-06-03 18:52:04,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678470746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:04,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:04,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:04,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362397248] [2024-06-03 18:52:04,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:04,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:04,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:04,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:04,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 411 transitions, 5476 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:04,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:04,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:04,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:04,981 INFO L124 PetriNetUnfolderBase]: 2720/4638 cut-off events. [2024-06-03 18:52:04,981 INFO L125 PetriNetUnfolderBase]: For 414064/414064 co-relation queries the response was YES. [2024-06-03 18:52:05,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31672 conditions, 4638 events. 2720/4638 cut-off events. For 414064/414064 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 30833 event pairs, 541 based on Foata normal form. 16/4647 useless extension candidates. Maximal degree in co-relation 31515. Up to 3829 conditions per place. [2024-06-03 18:52:05,042 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 267 selfloop transitions, 166 changer transitions 0/440 dead transitions. [2024-06-03 18:52:05,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 440 transitions, 6484 flow [2024-06-03 18:52:05,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:52:05,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:52:05,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-03 18:52:05,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 18:52:05,043 INFO L175 Difference]: Start difference. First operand has 321 places, 411 transitions, 5476 flow. Second operand 10 states and 230 transitions. [2024-06-03 18:52:05,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 440 transitions, 6484 flow [2024-06-03 18:52:06,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 440 transitions, 6128 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 18:52:06,310 INFO L231 Difference]: Finished difference. Result has 325 places, 413 transitions, 5528 flow [2024-06-03 18:52:06,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5124, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5528, PETRI_PLACES=325, PETRI_TRANSITIONS=413} [2024-06-03 18:52:06,311 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-03 18:52:06,311 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 413 transitions, 5528 flow [2024-06-03 18:52:06,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:06,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:06,311 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] [2024-06-03 18:52:06,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 18:52:06,312 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)] === [2024-06-03 18:52:06,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:06,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1173102762, now seen corresponding path program 9 times [2024-06-03 18:52:06,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:06,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753651535] [2024-06-03 18:52:06,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:06,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:06,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:06,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753651535] [2024-06-03 18:52:06,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753651535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:06,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:06,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:06,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555795019] [2024-06-03 18:52:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:06,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:06,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:06,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:06,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:06,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 413 transitions, 5528 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:06,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:06,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:06,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:07,283 INFO L124 PetriNetUnfolderBase]: 2760/4707 cut-off events. [2024-06-03 18:52:07,283 INFO L125 PetriNetUnfolderBase]: For 399762/399762 co-relation queries the response was YES. [2024-06-03 18:52:07,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32020 conditions, 4707 events. 2760/4707 cut-off events. For 399762/399762 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 31404 event pairs, 474 based on Foata normal form. 12/4712 useless extension candidates. Maximal degree in co-relation 31862. Up to 3499 conditions per place. [2024-06-03 18:52:07,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 179 changer transitions 0/447 dead transitions. [2024-06-03 18:52:07,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 447 transitions, 6740 flow [2024-06-03 18:52:07,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:52:07,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:52:07,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 18:52:07,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-03 18:52:07,346 INFO L175 Difference]: Start difference. First operand has 325 places, 413 transitions, 5528 flow. Second operand 8 states and 199 transitions. [2024-06-03 18:52:07,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 447 transitions, 6740 flow [2024-06-03 18:52:08,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 447 transitions, 6368 flow, removed 20 selfloop flow, removed 10 redundant places. [2024-06-03 18:52:08,644 INFO L231 Difference]: Finished difference. Result has 323 places, 415 transitions, 5586 flow [2024-06-03 18:52:08,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5158, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5586, PETRI_PLACES=323, PETRI_TRANSITIONS=415} [2024-06-03 18:52:08,645 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-03 18:52:08,645 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 415 transitions, 5586 flow [2024-06-03 18:52:08,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:08,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:08,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:08,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 18:52:08,646 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)] === [2024-06-03 18:52:08,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:08,646 INFO L85 PathProgramCache]: Analyzing trace with hash -346385930, now seen corresponding path program 10 times [2024-06-03 18:52:08,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:08,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804864383] [2024-06-03 18:52:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:08,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:08,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:08,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:08,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804864383] [2024-06-03 18:52:08,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804864383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:08,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:08,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253000781] [2024-06-03 18:52:08,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:08,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:08,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:08,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:08,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 415 transitions, 5586 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:08,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:08,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:08,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:09,763 INFO L124 PetriNetUnfolderBase]: 2778/4747 cut-off events. [2024-06-03 18:52:09,763 INFO L125 PetriNetUnfolderBase]: For 384540/384540 co-relation queries the response was YES. [2024-06-03 18:52:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31541 conditions, 4747 events. 2778/4747 cut-off events. For 384540/384540 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 31657 event pairs, 464 based on Foata normal form. 16/4760 useless extension candidates. Maximal degree in co-relation 31384. Up to 4084 conditions per place. [2024-06-03 18:52:09,817 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 374 selfloop transitions, 67 changer transitions 0/448 dead transitions. [2024-06-03 18:52:09,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 448 transitions, 6619 flow [2024-06-03 18:52:09,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:09,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:09,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 18:52:09,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 18:52:09,818 INFO L175 Difference]: Start difference. First operand has 323 places, 415 transitions, 5586 flow. Second operand 7 states and 181 transitions. [2024-06-03 18:52:09,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 448 transitions, 6619 flow [2024-06-03 18:52:11,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 448 transitions, 6061 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 18:52:11,425 INFO L231 Difference]: Finished difference. Result has 322 places, 418 transitions, 5243 flow [2024-06-03 18:52:11,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5243, PETRI_PLACES=322, PETRI_TRANSITIONS=418} [2024-06-03 18:52:11,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-03 18:52:11,426 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 418 transitions, 5243 flow [2024-06-03 18:52:11,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:11,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:11,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:11,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 18:52:11,426 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)] === [2024-06-03 18:52:11,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:11,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1178828214, now seen corresponding path program 2 times [2024-06-03 18:52:11,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:11,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583891676] [2024-06-03 18:52:11,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:11,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:11,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:11,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:11,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:11,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583891676] [2024-06-03 18:52:11,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583891676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:11,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:11,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:11,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087100345] [2024-06-03 18:52:11,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:11,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:11,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:11,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:11,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:11,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:11,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 418 transitions, 5243 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:11,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:11,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:11,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:12,374 INFO L124 PetriNetUnfolderBase]: 2818/4804 cut-off events. [2024-06-03 18:52:12,374 INFO L125 PetriNetUnfolderBase]: For 368616/368616 co-relation queries the response was YES. [2024-06-03 18:52:12,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30937 conditions, 4804 events. 2818/4804 cut-off events. For 368616/368616 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 32055 event pairs, 535 based on Foata normal form. 12/4809 useless extension candidates. Maximal degree in co-relation 30781. Up to 3739 conditions per place. [2024-06-03 18:52:12,434 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 263 selfloop transitions, 180 changer transitions 0/450 dead transitions. [2024-06-03 18:52:12,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 450 transitions, 6279 flow [2024-06-03 18:52:12,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:52:12,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:52:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 232 transitions. [2024-06-03 18:52:12,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5523809523809524 [2024-06-03 18:52:12,435 INFO L175 Difference]: Start difference. First operand has 322 places, 418 transitions, 5243 flow. Second operand 10 states and 232 transitions. [2024-06-03 18:52:12,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 450 transitions, 6279 flow [2024-06-03 18:52:13,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 450 transitions, 6125 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 18:52:13,729 INFO L231 Difference]: Finished difference. Result has 327 places, 420 transitions, 5517 flow [2024-06-03 18:52:13,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5517, PETRI_PLACES=327, PETRI_TRANSITIONS=420} [2024-06-03 18:52:13,729 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-03 18:52:13,729 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 420 transitions, 5517 flow [2024-06-03 18:52:13,729 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:13,729 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:13,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:13,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 18:52:13,729 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)] === [2024-06-03 18:52:13,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:13,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2014759392, now seen corresponding path program 3 times [2024-06-03 18:52:13,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:13,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169710863] [2024-06-03 18:52:13,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:13,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:13,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:13,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:13,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:13,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169710863] [2024-06-03 18:52:13,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169710863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:13,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:13,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:13,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374241925] [2024-06-03 18:52:13,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:13,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:13,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:13,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:13,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:13,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:13,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 420 transitions, 5517 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:13,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:13,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:13,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:14,708 INFO L124 PetriNetUnfolderBase]: 2858/4889 cut-off events. [2024-06-03 18:52:14,709 INFO L125 PetriNetUnfolderBase]: For 376446/376446 co-relation queries the response was YES. [2024-06-03 18:52:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31807 conditions, 4889 events. 2858/4889 cut-off events. For 376446/376446 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 32809 event pairs, 476 based on Foata normal form. 12/4898 useless extension candidates. Maximal degree in co-relation 31650. Up to 4152 conditions per place. [2024-06-03 18:52:14,770 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 69 changer transitions 0/452 dead transitions. [2024-06-03 18:52:14,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 452 transitions, 6563 flow [2024-06-03 18:52:14,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:14,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:14,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 18:52:14,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 18:52:14,771 INFO L175 Difference]: Start difference. First operand has 327 places, 420 transitions, 5517 flow. Second operand 7 states and 179 transitions. [2024-06-03 18:52:14,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 452 transitions, 6563 flow [2024-06-03 18:52:16,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 452 transitions, 6161 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-03 18:52:16,528 INFO L231 Difference]: Finished difference. Result has 326 places, 422 transitions, 5322 flow [2024-06-03 18:52:16,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5119, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5322, PETRI_PLACES=326, PETRI_TRANSITIONS=422} [2024-06-03 18:52:16,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 283 predicate places. [2024-06-03 18:52:16,528 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 422 transitions, 5322 flow [2024-06-03 18:52:16,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:16,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:16,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:16,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 18:52:16,529 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)] === [2024-06-03 18:52:16,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash -80473448, now seen corresponding path program 4 times [2024-06-03 18:52:16,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:16,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729983280] [2024-06-03 18:52:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:16,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:16,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:16,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:16,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729983280] [2024-06-03 18:52:16,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729983280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:16,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:16,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:16,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195409265] [2024-06-03 18:52:16,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:16,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:16,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:16,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:16,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:16,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:16,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 422 transitions, 5322 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:16,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:16,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:16,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:17,522 INFO L124 PetriNetUnfolderBase]: 2924/5001 cut-off events. [2024-06-03 18:52:17,522 INFO L125 PetriNetUnfolderBase]: For 393029/393029 co-relation queries the response was YES. [2024-06-03 18:52:17,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32503 conditions, 5001 events. 2924/5001 cut-off events. For 393029/393029 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 33742 event pairs, 457 based on Foata normal form. 12/5010 useless extension candidates. Maximal degree in co-relation 32345. Up to 3972 conditions per place. [2024-06-03 18:52:17,589 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 72 changer transitions 0/454 dead transitions. [2024-06-03 18:52:17,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 454 transitions, 6564 flow [2024-06-03 18:52:17,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:17,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:17,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 18:52:17,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 18:52:17,590 INFO L175 Difference]: Start difference. First operand has 326 places, 422 transitions, 5322 flow. Second operand 7 states and 176 transitions. [2024-06-03 18:52:17,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 454 transitions, 6564 flow [2024-06-03 18:52:19,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 454 transitions, 6387 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 18:52:19,020 INFO L231 Difference]: Finished difference. Result has 329 places, 425 transitions, 5419 flow [2024-06-03 18:52:19,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5145, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5419, PETRI_PLACES=329, PETRI_TRANSITIONS=425} [2024-06-03 18:52:19,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-03 18:52:19,020 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 425 transitions, 5419 flow [2024-06-03 18:52:19,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:19,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:19,021 INFO 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] [2024-06-03 18:52:19,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 18:52:19,021 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)] === [2024-06-03 18:52:19,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:19,021 INFO L85 PathProgramCache]: Analyzing trace with hash -452559100, now seen corresponding path program 1 times [2024-06-03 18:52:19,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:19,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721413850] [2024-06-03 18:52:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:19,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:19,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:19,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:19,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721413850] [2024-06-03 18:52:19,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721413850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:19,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:19,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:19,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102127729] [2024-06-03 18:52:19,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:19,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:19,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:19,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:19,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:19,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:19,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 425 transitions, 5419 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:19,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:19,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:19,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:19,985 INFO L124 PetriNetUnfolderBase]: 2945/5027 cut-off events. [2024-06-03 18:52:19,985 INFO L125 PetriNetUnfolderBase]: For 368477/368483 co-relation queries the response was YES. [2024-06-03 18:52:20,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 5027 events. 2945/5027 cut-off events. For 368477/368483 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 33922 event pairs, 601 based on Foata normal form. 1/5021 useless extension candidates. Maximal degree in co-relation 32861. Up to 4244 conditions per place. [2024-06-03 18:52:20,049 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 105 changer transitions 0/470 dead transitions. [2024-06-03 18:52:20,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 470 transitions, 7093 flow [2024-06-03 18:52:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:52:20,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:52:20,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 18:52:20,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-03 18:52:20,050 INFO L175 Difference]: Start difference. First operand has 329 places, 425 transitions, 5419 flow. Second operand 8 states and 201 transitions. [2024-06-03 18:52:20,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 470 transitions, 7093 flow [2024-06-03 18:52:21,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 470 transitions, 6967 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 18:52:21,746 INFO L231 Difference]: Finished difference. Result has 333 places, 437 transitions, 5659 flow [2024-06-03 18:52:21,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5293, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5659, PETRI_PLACES=333, PETRI_TRANSITIONS=437} [2024-06-03 18:52:21,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-03 18:52:21,747 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 437 transitions, 5659 flow [2024-06-03 18:52:21,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:21,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:21,747 INFO 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] [2024-06-03 18:52:21,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 18:52:21,748 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)] === [2024-06-03 18:52:21,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:21,748 INFO L85 PathProgramCache]: Analyzing trace with hash -452438944, now seen corresponding path program 1 times [2024-06-03 18:52:21,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:21,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434576400] [2024-06-03 18:52:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:21,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:21,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:21,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434576400] [2024-06-03 18:52:21,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434576400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:21,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:21,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:21,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335597043] [2024-06-03 18:52:21,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:21,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:21,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:21,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:21,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:21,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 437 transitions, 5659 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:21,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:21,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:21,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:22,735 INFO L124 PetriNetUnfolderBase]: 2971/5067 cut-off events. [2024-06-03 18:52:22,735 INFO L125 PetriNetUnfolderBase]: For 383135/383141 co-relation queries the response was YES. [2024-06-03 18:52:22,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33900 conditions, 5067 events. 2971/5067 cut-off events. For 383135/383141 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 34142 event pairs, 587 based on Foata normal form. 5/5067 useless extension candidates. Maximal degree in co-relation 33739. Up to 4333 conditions per place. [2024-06-03 18:52:22,801 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 352 selfloop transitions, 120 changer transitions 0/479 dead transitions. [2024-06-03 18:52:22,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 479 transitions, 7364 flow [2024-06-03 18:52:22,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:52:22,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:52:22,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 18:52:22,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 18:52:22,802 INFO L175 Difference]: Start difference. First operand has 333 places, 437 transitions, 5659 flow. Second operand 8 states and 198 transitions. [2024-06-03 18:52:22,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 479 transitions, 7364 flow [2024-06-03 18:52:24,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 479 transitions, 7229 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-03 18:52:24,576 INFO L231 Difference]: Finished difference. Result has 340 places, 449 transitions, 5941 flow [2024-06-03 18:52:24,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5941, PETRI_PLACES=340, PETRI_TRANSITIONS=449} [2024-06-03 18:52:24,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-03 18:52:24,577 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 449 transitions, 5941 flow [2024-06-03 18:52:24,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:24,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:24,577 INFO 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] [2024-06-03 18:52:24,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 18:52:24,577 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)] === [2024-06-03 18:52:24,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:24,578 INFO L85 PathProgramCache]: Analyzing trace with hash -452439130, now seen corresponding path program 2 times [2024-06-03 18:52:24,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:24,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506673726] [2024-06-03 18:52:24,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:24,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:24,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:24,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506673726] [2024-06-03 18:52:24,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506673726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:24,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:24,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:24,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096888603] [2024-06-03 18:52:24,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:24,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:24,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 449 transitions, 5941 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:24,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:24,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:24,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:25,609 INFO L124 PetriNetUnfolderBase]: 2976/5076 cut-off events. [2024-06-03 18:52:25,609 INFO L125 PetriNetUnfolderBase]: For 384147/384153 co-relation queries the response was YES. [2024-06-03 18:52:25,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34198 conditions, 5076 events. 2976/5076 cut-off events. For 384147/384153 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 34269 event pairs, 576 based on Foata normal form. 5/5076 useless extension candidates. Maximal degree in co-relation 34033. Up to 4471 conditions per place. [2024-06-03 18:52:25,678 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 60 changer transitions 0/479 dead transitions. [2024-06-03 18:52:25,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 479 transitions, 6973 flow [2024-06-03 18:52:25,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:52:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:52:25,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 18:52:25,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 18:52:25,679 INFO L175 Difference]: Start difference. First operand has 340 places, 449 transitions, 5941 flow. Second operand 8 states and 191 transitions. [2024-06-03 18:52:25,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 479 transitions, 6973 flow [2024-06-03 18:52:27,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 479 transitions, 6687 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 18:52:27,517 INFO L231 Difference]: Finished difference. Result has 344 places, 452 transitions, 5807 flow [2024-06-03 18:52:27,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=344, PETRI_TRANSITIONS=452} [2024-06-03 18:52:27,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-03 18:52:27,517 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 452 transitions, 5807 flow [2024-06-03 18:52:27,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:27,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:27,517 INFO 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] [2024-06-03 18:52:27,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 18:52:27,517 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)] === [2024-06-03 18:52:27,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash -275070274, now seen corresponding path program 2 times [2024-06-03 18:52:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627317742] [2024-06-03 18:52:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:27,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:27,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627317742] [2024-06-03 18:52:27,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627317742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:27,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:27,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:27,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977833119] [2024-06-03 18:52:27,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:27,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:27,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:27,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:27,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:27,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:27,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 452 transitions, 5807 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:27,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:27,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:27,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:28,542 INFO L124 PetriNetUnfolderBase]: 2981/5086 cut-off events. [2024-06-03 18:52:28,542 INFO L125 PetriNetUnfolderBase]: For 391907/391913 co-relation queries the response was YES. [2024-06-03 18:52:28,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34123 conditions, 5086 events. 2981/5086 cut-off events. For 391907/391913 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 34378 event pairs, 596 based on Foata normal form. 5/5085 useless extension candidates. Maximal degree in co-relation 33957. Up to 4346 conditions per place. [2024-06-03 18:52:28,612 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 123 changer transitions 0/481 dead transitions. [2024-06-03 18:52:28,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 481 transitions, 7207 flow [2024-06-03 18:52:28,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:52:28,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:52:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 18:52:28,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-03 18:52:28,613 INFO L175 Difference]: Start difference. First operand has 344 places, 452 transitions, 5807 flow. Second operand 8 states and 194 transitions. [2024-06-03 18:52:28,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 481 transitions, 7207 flow [2024-06-03 18:52:30,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 481 transitions, 7075 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 18:52:30,337 INFO L231 Difference]: Finished difference. Result has 345 places, 455 transitions, 5959 flow [2024-06-03 18:52:30,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5959, PETRI_PLACES=345, PETRI_TRANSITIONS=455} [2024-06-03 18:52:30,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-03 18:52:30,338 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 455 transitions, 5959 flow [2024-06-03 18:52:30,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:30,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:30,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 18:52:30,338 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)] === [2024-06-03 18:52:30,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:30,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1286237584, now seen corresponding path program 3 times [2024-06-03 18:52:30,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:30,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773756389] [2024-06-03 18:52:30,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:30,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:30,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:30,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773756389] [2024-06-03 18:52:30,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773756389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:30,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:30,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:30,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201938344] [2024-06-03 18:52:30,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:30,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:30,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:30,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 455 transitions, 5959 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:30,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:30,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:30,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:31,363 INFO L124 PetriNetUnfolderBase]: 2991/5101 cut-off events. [2024-06-03 18:52:31,363 INFO L125 PetriNetUnfolderBase]: For 400172/400178 co-relation queries the response was YES. [2024-06-03 18:52:31,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34486 conditions, 5101 events. 2991/5101 cut-off events. For 400172/400178 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 34506 event pairs, 587 based on Foata normal form. 5/5101 useless extension candidates. Maximal degree in co-relation 34320. Up to 4356 conditions per place. [2024-06-03 18:52:31,432 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 357 selfloop transitions, 129 changer transitions 0/493 dead transitions. [2024-06-03 18:52:31,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 493 transitions, 7627 flow [2024-06-03 18:52:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:52:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:52:31,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 238 transitions. [2024-06-03 18:52:31,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-03 18:52:31,433 INFO L175 Difference]: Start difference. First operand has 345 places, 455 transitions, 5959 flow. Second operand 10 states and 238 transitions. [2024-06-03 18:52:31,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 493 transitions, 7627 flow [2024-06-03 18:52:33,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 493 transitions, 7467 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 18:52:33,019 INFO L231 Difference]: Finished difference. Result has 352 places, 461 transitions, 6151 flow [2024-06-03 18:52:33,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5804, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6151, PETRI_PLACES=352, PETRI_TRANSITIONS=461} [2024-06-03 18:52:33,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-03 18:52:33,019 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 461 transitions, 6151 flow [2024-06-03 18:52:33,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:33,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:33,020 INFO 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] [2024-06-03 18:52:33,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 18:52:33,020 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)] === [2024-06-03 18:52:33,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash 14051728, now seen corresponding path program 3 times [2024-06-03 18:52:33,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:33,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309360443] [2024-06-03 18:52:33,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:33,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:33,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:33,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:33,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309360443] [2024-06-03 18:52:33,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309360443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:33,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:33,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:52:33,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621490441] [2024-06-03 18:52:33,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:33,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:52:33,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:33,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:52:33,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:52:33,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:33,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 461 transitions, 6151 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:33,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:33,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:33,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:34,069 INFO L124 PetriNetUnfolderBase]: 3004/5121 cut-off events. [2024-06-03 18:52:34,070 INFO L125 PetriNetUnfolderBase]: For 413672/413678 co-relation queries the response was YES. [2024-06-03 18:52:34,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34837 conditions, 5121 events. 3004/5121 cut-off events. For 413672/413678 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 34609 event pairs, 576 based on Foata normal form. 5/5121 useless extension candidates. Maximal degree in co-relation 34668. Up to 4502 conditions per place. [2024-06-03 18:52:34,137 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 421 selfloop transitions, 70 changer transitions 0/498 dead transitions. [2024-06-03 18:52:34,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 498 transitions, 7445 flow [2024-06-03 18:52:34,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:52:34,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:52:34,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-03 18:52:34,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5346320346320347 [2024-06-03 18:52:34,138 INFO L175 Difference]: Start difference. First operand has 352 places, 461 transitions, 6151 flow. Second operand 11 states and 247 transitions. [2024-06-03 18:52:34,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 498 transitions, 7445 flow [2024-06-03 18:52:35,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 498 transitions, 7095 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 18:52:35,628 INFO L231 Difference]: Finished difference. Result has 356 places, 467 transitions, 6021 flow [2024-06-03 18:52:35,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6021, PETRI_PLACES=356, PETRI_TRANSITIONS=467} [2024-06-03 18:52:35,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-03 18:52:35,629 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 467 transitions, 6021 flow [2024-06-03 18:52:35,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:35,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:35,629 INFO 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] [2024-06-03 18:52:35,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 18:52:35,629 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)] === [2024-06-03 18:52:35,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:35,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1170589538, now seen corresponding path program 4 times [2024-06-03 18:52:35,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:35,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289179662] [2024-06-03 18:52:35,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:35,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:35,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:35,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289179662] [2024-06-03 18:52:35,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289179662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:35,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:35,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:35,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498686880] [2024-06-03 18:52:35,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:35,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:35,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:35,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:35,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:35,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:35,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 467 transitions, 6021 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:35,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:35,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:35,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:36,625 INFO L124 PetriNetUnfolderBase]: 3017/5113 cut-off events. [2024-06-03 18:52:36,625 INFO L125 PetriNetUnfolderBase]: For 426302/426302 co-relation queries the response was YES. [2024-06-03 18:52:36,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34932 conditions, 5113 events. 3017/5113 cut-off events. For 426302/426302 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 34447 event pairs, 621 based on Foata normal form. 1/5099 useless extension candidates. Maximal degree in co-relation 34762. Up to 4331 conditions per place. [2024-06-03 18:52:36,700 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 366 selfloop transitions, 123 changer transitions 0/496 dead transitions. [2024-06-03 18:52:36,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 496 transitions, 7687 flow [2024-06-03 18:52:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:36,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:52:36,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:52:36,701 INFO L175 Difference]: Start difference. First operand has 356 places, 467 transitions, 6021 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:52:36,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 496 transitions, 7687 flow [2024-06-03 18:52:38,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 496 transitions, 7463 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-03 18:52:38,529 INFO L231 Difference]: Finished difference. Result has 352 places, 473 transitions, 6129 flow [2024-06-03 18:52:38,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5797, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6129, PETRI_PLACES=352, PETRI_TRANSITIONS=473} [2024-06-03 18:52:38,530 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-03 18:52:38,530 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 473 transitions, 6129 flow [2024-06-03 18:52:38,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:38,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:38,530 INFO 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] [2024-06-03 18:52:38,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 18:52:38,530 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)] === [2024-06-03 18:52:38,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:38,530 INFO L85 PathProgramCache]: Analyzing trace with hash 634300144, now seen corresponding path program 5 times [2024-06-03 18:52:38,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:38,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447412487] [2024-06-03 18:52:38,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:38,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:38,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447412487] [2024-06-03 18:52:38,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447412487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:38,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302564441] [2024-06-03 18:52:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:38,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:38,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:38,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 473 transitions, 6129 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:38,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:38,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:38,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:39,546 INFO L124 PetriNetUnfolderBase]: 3030/5135 cut-off events. [2024-06-03 18:52:39,546 INFO L125 PetriNetUnfolderBase]: For 438743/438743 co-relation queries the response was YES. [2024-06-03 18:52:39,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35322 conditions, 5135 events. 3030/5135 cut-off events. For 438743/438743 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34669 event pairs, 621 based on Foata normal form. 1/5121 useless extension candidates. Maximal degree in co-relation 35153. Up to 4346 conditions per place. [2024-06-03 18:52:39,613 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 364 selfloop transitions, 128 changer transitions 0/499 dead transitions. [2024-06-03 18:52:39,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 499 transitions, 7811 flow [2024-06-03 18:52:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:39,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:52:39,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 18:52:39,614 INFO L175 Difference]: Start difference. First operand has 352 places, 473 transitions, 6129 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:52:39,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 499 transitions, 7811 flow [2024-06-03 18:52:41,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 499 transitions, 7533 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 18:52:41,326 INFO L231 Difference]: Finished difference. Result has 356 places, 479 transitions, 6205 flow [2024-06-03 18:52:41,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5887, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6205, PETRI_PLACES=356, PETRI_TRANSITIONS=479} [2024-06-03 18:52:41,326 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-03 18:52:41,326 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 479 transitions, 6205 flow [2024-06-03 18:52:41,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:41,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:41,327 INFO 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] [2024-06-03 18:52:41,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 18:52:41,327 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)] === [2024-06-03 18:52:41,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:41,327 INFO L85 PathProgramCache]: Analyzing trace with hash -985730804, now seen corresponding path program 6 times [2024-06-03 18:52:41,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:41,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848379084] [2024-06-03 18:52:41,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:41,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:41,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:41,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:41,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848379084] [2024-06-03 18:52:41,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848379084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:41,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:41,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:41,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521569494] [2024-06-03 18:52:41,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:41,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:41,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:41,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:41,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:41,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:41,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 479 transitions, 6205 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:41,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:41,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:41,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:42,330 INFO L124 PetriNetUnfolderBase]: 3027/5131 cut-off events. [2024-06-03 18:52:42,330 INFO L125 PetriNetUnfolderBase]: For 443068/443068 co-relation queries the response was YES. [2024-06-03 18:52:42,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35246 conditions, 5131 events. 3027/5131 cut-off events. For 443068/443068 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 34642 event pairs, 621 based on Foata normal form. 1/5117 useless extension candidates. Maximal degree in co-relation 35076. Up to 4343 conditions per place. [2024-06-03 18:52:42,399 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 371 selfloop transitions, 125 changer transitions 0/503 dead transitions. [2024-06-03 18:52:42,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 503 transitions, 8007 flow [2024-06-03 18:52:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:42,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-03 18:52:42,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2024-06-03 18:52:42,400 INFO L175 Difference]: Start difference. First operand has 356 places, 479 transitions, 6205 flow. Second operand 7 states and 174 transitions. [2024-06-03 18:52:42,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 503 transitions, 8007 flow [2024-06-03 18:52:44,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 503 transitions, 7799 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 18:52:44,269 INFO L231 Difference]: Finished difference. Result has 360 places, 479 transitions, 6253 flow [2024-06-03 18:52:44,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5997, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6253, PETRI_PLACES=360, PETRI_TRANSITIONS=479} [2024-06-03 18:52:44,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-03 18:52:44,270 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 479 transitions, 6253 flow [2024-06-03 18:52:44,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:44,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:44,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:44,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 18:52:44,270 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)] === [2024-06-03 18:52:44,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash -985610834, now seen corresponding path program 7 times [2024-06-03 18:52:44,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:44,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371703081] [2024-06-03 18:52:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:44,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:44,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:44,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371703081] [2024-06-03 18:52:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371703081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:44,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:44,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:44,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770079760] [2024-06-03 18:52:44,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:44,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:44,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:44,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:44,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:44,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:44,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 479 transitions, 6253 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:44,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:44,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:44,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:45,339 INFO L124 PetriNetUnfolderBase]: 3037/5157 cut-off events. [2024-06-03 18:52:45,339 INFO L125 PetriNetUnfolderBase]: For 452075/452075 co-relation queries the response was YES. [2024-06-03 18:52:45,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35477 conditions, 5157 events. 3037/5157 cut-off events. For 452075/452075 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 34890 event pairs, 591 based on Foata normal form. 1/5146 useless extension candidates. Maximal degree in co-relation 35306. Up to 4554 conditions per place. [2024-06-03 18:52:45,407 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 429 selfloop transitions, 66 changer transitions 0/502 dead transitions. [2024-06-03 18:52:45,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 502 transitions, 7373 flow [2024-06-03 18:52:45,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:45,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:45,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 18:52:45,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5544217687074829 [2024-06-03 18:52:45,408 INFO L175 Difference]: Start difference. First operand has 360 places, 479 transitions, 6253 flow. Second operand 7 states and 163 transitions. [2024-06-03 18:52:45,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 502 transitions, 7373 flow [2024-06-03 18:52:47,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 502 transitions, 6975 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 18:52:47,680 INFO L231 Difference]: Finished difference. Result has 360 places, 485 transitions, 6087 flow [2024-06-03 18:52:47,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6087, PETRI_PLACES=360, PETRI_TRANSITIONS=485} [2024-06-03 18:52:47,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-03 18:52:47,680 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 485 transitions, 6087 flow [2024-06-03 18:52:47,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:47,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:47,680 INFO 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] [2024-06-03 18:52:47,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 18:52:47,680 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)] === [2024-06-03 18:52:47,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:47,681 INFO L85 PathProgramCache]: Analyzing trace with hash -985610648, now seen corresponding path program 4 times [2024-06-03 18:52:47,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:47,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210830953] [2024-06-03 18:52:47,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:47,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:47,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:47,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:47,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210830953] [2024-06-03 18:52:47,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210830953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:47,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:47,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:47,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927751699] [2024-06-03 18:52:47,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:47,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:47,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:47,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:47,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 485 transitions, 6087 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:47,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:47,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:47,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:48,668 INFO L124 PetriNetUnfolderBase]: 3042/5164 cut-off events. [2024-06-03 18:52:48,668 INFO L125 PetriNetUnfolderBase]: For 459031/459031 co-relation queries the response was YES. [2024-06-03 18:52:48,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35358 conditions, 5164 events. 3042/5164 cut-off events. For 459031/459031 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 34887 event pairs, 613 based on Foata normal form. 1/5153 useless extension candidates. Maximal degree in co-relation 35187. Up to 4423 conditions per place. [2024-06-03 18:52:48,738 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 368 selfloop transitions, 133 changer transitions 0/508 dead transitions. [2024-06-03 18:52:48,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 508 transitions, 7753 flow [2024-06-03 18:52:48,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 18:52:48,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 18:52:48,739 INFO L175 Difference]: Start difference. First operand has 360 places, 485 transitions, 6087 flow. Second operand 7 states and 169 transitions. [2024-06-03 18:52:48,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 508 transitions, 7753 flow [2024-06-03 18:52:50,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 508 transitions, 7615 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 18:52:50,839 INFO L231 Difference]: Finished difference. Result has 363 places, 488 transitions, 6261 flow [2024-06-03 18:52:50,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6261, PETRI_PLACES=363, PETRI_TRANSITIONS=488} [2024-06-03 18:52:50,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-03 18:52:50,840 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 488 transitions, 6261 flow [2024-06-03 18:52:50,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:50,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:50,840 INFO 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] [2024-06-03 18:52:50,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 18:52:50,840 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)] === [2024-06-03 18:52:50,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:50,840 INFO L85 PathProgramCache]: Analyzing trace with hash -660662324, now seen corresponding path program 8 times [2024-06-03 18:52:50,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:50,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166508954] [2024-06-03 18:52:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:50,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:50,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:50,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:50,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:50,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166508954] [2024-06-03 18:52:50,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166508954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:50,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:50,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:50,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434065380] [2024-06-03 18:52:50,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:50,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:50,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:50,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:50,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:50,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:50,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 488 transitions, 6261 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:50,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:50,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:50,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:51,953 INFO L124 PetriNetUnfolderBase]: 3060/5197 cut-off events. [2024-06-03 18:52:51,953 INFO L125 PetriNetUnfolderBase]: For 472930/472930 co-relation queries the response was YES. [2024-06-03 18:52:52,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35870 conditions, 5197 events. 3060/5197 cut-off events. For 472930/472930 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 35225 event pairs, 591 based on Foata normal form. 1/5186 useless extension candidates. Maximal degree in co-relation 35698. Up to 4569 conditions per place. [2024-06-03 18:52:52,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 425 selfloop transitions, 80 changer transitions 0/512 dead transitions. [2024-06-03 18:52:52,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 512 transitions, 7595 flow [2024-06-03 18:52:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:52,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:52,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 18:52:52,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-03 18:52:52,027 INFO L175 Difference]: Start difference. First operand has 363 places, 488 transitions, 6261 flow. Second operand 7 states and 164 transitions. [2024-06-03 18:52:52,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 512 transitions, 7595 flow [2024-06-03 18:52:54,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 512 transitions, 7259 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 18:52:54,199 INFO L231 Difference]: Finished difference. Result has 366 places, 497 transitions, 6214 flow [2024-06-03 18:52:54,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5929, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6214, PETRI_PLACES=366, PETRI_TRANSITIONS=497} [2024-06-03 18:52:54,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-03 18:52:54,200 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 497 transitions, 6214 flow [2024-06-03 18:52:54,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:54,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:54,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:52:54,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 18:52:54,200 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)] === [2024-06-03 18:52:54,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:54,201 INFO L85 PathProgramCache]: Analyzing trace with hash -660483578, now seen corresponding path program 5 times [2024-06-03 18:52:54,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:54,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078389106] [2024-06-03 18:52:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:54,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:54,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:54,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078389106] [2024-06-03 18:52:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078389106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:54,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:54,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:54,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186532041] [2024-06-03 18:52:54,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:54,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:54,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:54,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:54,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:54,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:54,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 497 transitions, 6214 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:54,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:54,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:54,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:55,215 INFO L124 PetriNetUnfolderBase]: 3073/5217 cut-off events. [2024-06-03 18:52:55,215 INFO L125 PetriNetUnfolderBase]: For 485995/485995 co-relation queries the response was YES. [2024-06-03 18:52:55,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36030 conditions, 5217 events. 3073/5217 cut-off events. For 485995/485995 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35362 event pairs, 613 based on Foata normal form. 1/5206 useless extension candidates. Maximal degree in co-relation 35857. Up to 4460 conditions per place. [2024-06-03 18:52:55,294 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 375 selfloop transitions, 138 changer transitions 0/520 dead transitions. [2024-06-03 18:52:55,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 520 transitions, 7932 flow [2024-06-03 18:52:55,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:52:55,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:52:55,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 18:52:55,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 18:52:55,295 INFO L175 Difference]: Start difference. First operand has 366 places, 497 transitions, 6214 flow. Second operand 7 states and 168 transitions. [2024-06-03 18:52:55,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 520 transitions, 7932 flow [2024-06-03 18:52:57,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 520 transitions, 7824 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 18:52:57,635 INFO L231 Difference]: Finished difference. Result has 371 places, 503 transitions, 6452 flow [2024-06-03 18:52:57,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6106, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6452, PETRI_PLACES=371, PETRI_TRANSITIONS=503} [2024-06-03 18:52:57,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 18:52:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 503 transitions, 6452 flow [2024-06-03 18:52:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:57,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:52:57,636 INFO 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] [2024-06-03 18:52:57,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 18:52:57,636 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)] === [2024-06-03 18:52:57,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:52:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash -660869714, now seen corresponding path program 9 times [2024-06-03 18:52:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:52:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824536917] [2024-06-03 18:52:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:52:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:52:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:52:57,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:52:57,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:52:57,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824536917] [2024-06-03 18:52:57,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824536917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:52:57,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:52:57,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:52:57,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988024841] [2024-06-03 18:52:57,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:52:57,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:52:57,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:52:57,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:52:57,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:52:57,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:52:57,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 503 transitions, 6452 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:52:57,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:52:57,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:52:57,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:52:58,723 INFO L124 PetriNetUnfolderBase]: 3070/5215 cut-off events. [2024-06-03 18:52:58,723 INFO L125 PetriNetUnfolderBase]: For 490880/490880 co-relation queries the response was YES. [2024-06-03 18:52:58,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36200 conditions, 5215 events. 3070/5215 cut-off events. For 490880/490880 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35334 event pairs, 591 based on Foata normal form. 1/5204 useless extension candidates. Maximal degree in co-relation 36026. Up to 4584 conditions per place. [2024-06-03 18:52:58,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 81 changer transitions 0/519 dead transitions. [2024-06-03 18:52:58,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 519 transitions, 7514 flow [2024-06-03 18:52:58,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:52:58,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:52:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 18:52:58,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264550264550265 [2024-06-03 18:52:58,794 INFO L175 Difference]: Start difference. First operand has 371 places, 503 transitions, 6452 flow. Second operand 9 states and 199 transitions. [2024-06-03 18:52:58,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 519 transitions, 7514 flow [2024-06-03 18:53:01,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 519 transitions, 7286 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 18:53:01,149 INFO L231 Difference]: Finished difference. Result has 377 places, 503 transitions, 6392 flow [2024-06-03 18:53:01,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6224, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6392, PETRI_PLACES=377, PETRI_TRANSITIONS=503} [2024-06-03 18:53:01,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-03 18:53:01,149 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 503 transitions, 6392 flow [2024-06-03 18:53:01,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:01,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:01,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:53:01,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 18:53:01,150 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)] === [2024-06-03 18:53:01,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:01,150 INFO L85 PathProgramCache]: Analyzing trace with hash 433897420, now seen corresponding path program 6 times [2024-06-03 18:53:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253476930] [2024-06-03 18:53:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:01,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:01,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253476930] [2024-06-03 18:53:01,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253476930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:01,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:01,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:53:01,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707145791] [2024-06-03 18:53:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:53:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:01,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:53:01,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:53:01,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:01,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 503 transitions, 6392 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:01,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:01,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:02,164 INFO L124 PetriNetUnfolderBase]: 3067/5209 cut-off events. [2024-06-03 18:53:02,164 INFO L125 PetriNetUnfolderBase]: For 495016/495016 co-relation queries the response was YES. [2024-06-03 18:53:02,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36039 conditions, 5209 events. 3067/5209 cut-off events. For 495016/495016 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 35285 event pairs, 613 based on Foata normal form. 1/5198 useless extension candidates. Maximal degree in co-relation 35864. Up to 4453 conditions per place. [2024-06-03 18:53:02,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 376 selfloop transitions, 136 changer transitions 0/519 dead transitions. [2024-06-03 18:53:02,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 519 transitions, 7854 flow [2024-06-03 18:53:02,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:53:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:53:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 18:53:02,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 18:53:02,243 INFO L175 Difference]: Start difference. First operand has 377 places, 503 transitions, 6392 flow. Second operand 7 states and 167 transitions. [2024-06-03 18:53:02,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 519 transitions, 7854 flow [2024-06-03 18:53:04,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 519 transitions, 7656 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 18:53:04,146 INFO L231 Difference]: Finished difference. Result has 376 places, 503 transitions, 6472 flow [2024-06-03 18:53:04,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6472, PETRI_PLACES=376, PETRI_TRANSITIONS=503} [2024-06-03 18:53:04,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-03 18:53:04,147 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 503 transitions, 6472 flow [2024-06-03 18:53:04,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:04,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:04,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:53:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 18:53:04,147 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)] === [2024-06-03 18:53:04,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:04,147 INFO L85 PathProgramCache]: Analyzing trace with hash -61539774, now seen corresponding path program 7 times [2024-06-03 18:53:04,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:04,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420337577] [2024-06-03 18:53:04,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:04,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:04,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:04,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420337577] [2024-06-03 18:53:04,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420337577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:04,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:04,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89333200] [2024-06-03 18:53:04,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:04,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:04,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:04,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:04,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:04,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:04,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 503 transitions, 6472 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:04,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:04,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:04,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:05,238 INFO L124 PetriNetUnfolderBase]: 3080/5254 cut-off events. [2024-06-03 18:53:05,238 INFO L125 PetriNetUnfolderBase]: For 510222/510228 co-relation queries the response was YES. [2024-06-03 18:53:05,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36504 conditions, 5254 events. 3080/5254 cut-off events. For 510222/510228 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 35787 event pairs, 602 based on Foata normal form. 5/5253 useless extension candidates. Maximal degree in co-relation 36328. Up to 4468 conditions per place. [2024-06-03 18:53:05,311 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 142 changer transitions 0/530 dead transitions. [2024-06-03 18:53:05,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 530 transitions, 8256 flow [2024-06-03 18:53:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:05,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 18:53:05,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-03 18:53:05,312 INFO L175 Difference]: Start difference. First operand has 376 places, 503 transitions, 6472 flow. Second operand 8 states and 190 transitions. [2024-06-03 18:53:05,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 530 transitions, 8256 flow [2024-06-03 18:53:07,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 530 transitions, 7959 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 18:53:07,439 INFO L231 Difference]: Finished difference. Result has 378 places, 509 transitions, 6547 flow [2024-06-03 18:53:07,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6187, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6547, PETRI_PLACES=378, PETRI_TRANSITIONS=509} [2024-06-03 18:53:07,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-03 18:53:07,439 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 509 transitions, 6547 flow [2024-06-03 18:53:07,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:07,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:07,439 INFO 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] [2024-06-03 18:53:07,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 18:53:07,440 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)] === [2024-06-03 18:53:07,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash 662415146, now seen corresponding path program 10 times [2024-06-03 18:53:07,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:07,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439401708] [2024-06-03 18:53:07,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:07,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:07,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:07,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439401708] [2024-06-03 18:53:07,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439401708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:07,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:07,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:53:07,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433481923] [2024-06-03 18:53:07,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:07,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:53:07,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:07,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:53:07,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:53:07,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:07,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 509 transitions, 6547 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:07,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:07,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:07,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:08,519 INFO L124 PetriNetUnfolderBase]: 3085/5242 cut-off events. [2024-06-03 18:53:08,519 INFO L125 PetriNetUnfolderBase]: For 519383/519383 co-relation queries the response was YES. [2024-06-03 18:53:08,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36633 conditions, 5242 events. 3085/5242 cut-off events. For 519383/519383 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 35632 event pairs, 591 based on Foata normal form. 1/5231 useless extension candidates. Maximal degree in co-relation 36456. Up to 4455 conditions per place. [2024-06-03 18:53:08,593 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 392 selfloop transitions, 138 changer transitions 0/537 dead transitions. [2024-06-03 18:53:08,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 537 transitions, 8111 flow [2024-06-03 18:53:08,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:53:08,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:53:08,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 18:53:08,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 18:53:08,594 INFO L175 Difference]: Start difference. First operand has 378 places, 509 transitions, 6547 flow. Second operand 7 states and 176 transitions. [2024-06-03 18:53:08,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 537 transitions, 8111 flow [2024-06-03 18:53:10,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 537 transitions, 7884 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 18:53:10,977 INFO L231 Difference]: Finished difference. Result has 382 places, 512 transitions, 6691 flow [2024-06-03 18:53:10,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6320, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6691, PETRI_PLACES=382, PETRI_TRANSITIONS=512} [2024-06-03 18:53:10,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-03 18:53:10,977 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 512 transitions, 6691 flow [2024-06-03 18:53:10,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:10,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:10,977 INFO 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] [2024-06-03 18:53:10,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 18:53:10,978 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)] === [2024-06-03 18:53:10,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:10,978 INFO L85 PathProgramCache]: Analyzing trace with hash -66301374, now seen corresponding path program 8 times [2024-06-03 18:53:10,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:10,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933441176] [2024-06-03 18:53:10,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:10,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:11,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:11,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:11,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933441176] [2024-06-03 18:53:11,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933441176] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:11,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:11,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:11,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431714069] [2024-06-03 18:53:11,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:11,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:11,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:11,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:11,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:11,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:11,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 512 transitions, 6691 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:11,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:11,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:11,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:12,070 INFO L124 PetriNetUnfolderBase]: 3090/5270 cut-off events. [2024-06-03 18:53:12,070 INFO L125 PetriNetUnfolderBase]: For 530405/530411 co-relation queries the response was YES. [2024-06-03 18:53:12,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36902 conditions, 5270 events. 3090/5270 cut-off events. For 530405/530411 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35894 event pairs, 606 based on Foata normal form. 5/5269 useless extension candidates. Maximal degree in co-relation 36722. Up to 4481 conditions per place. [2024-06-03 18:53:12,146 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 383 selfloop transitions, 145 changer transitions 0/535 dead transitions. [2024-06-03 18:53:12,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 535 transitions, 8231 flow [2024-06-03 18:53:12,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:12,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:12,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 18:53:12,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-06-03 18:53:12,147 INFO L175 Difference]: Start difference. First operand has 382 places, 512 transitions, 6691 flow. Second operand 8 states and 189 transitions. [2024-06-03 18:53:12,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 535 transitions, 8231 flow [2024-06-03 18:53:14,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 535 transitions, 7911 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 18:53:14,704 INFO L231 Difference]: Finished difference. Result has 383 places, 515 transitions, 6699 flow [2024-06-03 18:53:14,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6699, PETRI_PLACES=383, PETRI_TRANSITIONS=515} [2024-06-03 18:53:14,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-03 18:53:14,705 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 515 transitions, 6699 flow [2024-06-03 18:53:14,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:14,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:14,705 INFO 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] [2024-06-03 18:53:14,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 18:53:14,705 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)] === [2024-06-03 18:53:14,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2067592896, now seen corresponding path program 11 times [2024-06-03 18:53:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:14,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563705112] [2024-06-03 18:53:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:14,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:14,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:14,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:14,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563705112] [2024-06-03 18:53:14,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563705112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:14,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:14,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:53:14,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420345915] [2024-06-03 18:53:14,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:14,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:53:14,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:14,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:53:14,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:53:14,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:14,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 515 transitions, 6699 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:14,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:14,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:14,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:15,788 INFO L124 PetriNetUnfolderBase]: 3087/5245 cut-off events. [2024-06-03 18:53:15,788 INFO L125 PetriNetUnfolderBase]: For 515248/515248 co-relation queries the response was YES. [2024-06-03 18:53:15,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36632 conditions, 5245 events. 3087/5245 cut-off events. For 515248/515248 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 35651 event pairs, 591 based on Foata normal form. 1/5234 useless extension candidates. Maximal degree in co-relation 36452. Up to 4459 conditions per place. [2024-06-03 18:53:15,863 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 399 selfloop transitions, 142 changer transitions 0/548 dead transitions. [2024-06-03 18:53:15,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 548 transitions, 8271 flow [2024-06-03 18:53:15,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:53:15,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:53:15,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-03 18:53:15,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-03 18:53:15,864 INFO L175 Difference]: Start difference. First operand has 383 places, 515 transitions, 6699 flow. Second operand 9 states and 220 transitions. [2024-06-03 18:53:15,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 548 transitions, 8271 flow [2024-06-03 18:53:17,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 548 transitions, 8067 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 18:53:17,895 INFO L231 Difference]: Finished difference. Result has 387 places, 515 transitions, 6797 flow [2024-06-03 18:53:17,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6495, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6797, PETRI_PLACES=387, PETRI_TRANSITIONS=515} [2024-06-03 18:53:17,896 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-03 18:53:17,896 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 515 transitions, 6797 flow [2024-06-03 18:53:17,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:17,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:17,896 INFO 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] [2024-06-03 18:53:17,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 18:53:17,896 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)] === [2024-06-03 18:53:17,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:17,896 INFO L85 PathProgramCache]: Analyzing trace with hash -289826874, now seen corresponding path program 9 times [2024-06-03 18:53:17,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:17,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161868918] [2024-06-03 18:53:17,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:17,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:18,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:18,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161868918] [2024-06-03 18:53:18,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161868918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:18,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:18,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:53:18,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069652987] [2024-06-03 18:53:18,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:18,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:53:18,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:18,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:53:18,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:53:18,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:18,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 515 transitions, 6797 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:18,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:18,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:18,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:18,932 INFO L124 PetriNetUnfolderBase]: 3092/5252 cut-off events. [2024-06-03 18:53:18,932 INFO L125 PetriNetUnfolderBase]: For 525510/525510 co-relation queries the response was YES. [2024-06-03 18:53:18,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36834 conditions, 5252 events. 3092/5252 cut-off events. For 525510/525510 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35684 event pairs, 613 based on Foata normal form. 1/5241 useless extension candidates. Maximal degree in co-relation 36652. Up to 4483 conditions per place. [2024-06-03 18:53:19,006 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 376 selfloop transitions, 154 changer transitions 0/537 dead transitions. [2024-06-03 18:53:19,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 537 transitions, 8562 flow [2024-06-03 18:53:19,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:53:19,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:53:19,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 18:53:19,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-03 18:53:19,007 INFO L175 Difference]: Start difference. First operand has 387 places, 515 transitions, 6797 flow. Second operand 6 states and 151 transitions. [2024-06-03 18:53:19,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 537 transitions, 8562 flow [2024-06-03 18:53:21,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 537 transitions, 8246 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-03 18:53:21,606 INFO L231 Difference]: Finished difference. Result has 383 places, 518 transitions, 6862 flow [2024-06-03 18:53:21,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6499, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6862, PETRI_PLACES=383, PETRI_TRANSITIONS=518} [2024-06-03 18:53:21,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-03 18:53:21,607 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 518 transitions, 6862 flow [2024-06-03 18:53:21,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:21,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:21,607 INFO 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] [2024-06-03 18:53:21,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 18:53:21,608 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)] === [2024-06-03 18:53:21,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:21,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2012541798, now seen corresponding path program 10 times [2024-06-03 18:53:21,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:21,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122069538] [2024-06-03 18:53:21,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:21,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:21,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:21,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122069538] [2024-06-03 18:53:21,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122069538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:21,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:21,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:53:21,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191583902] [2024-06-03 18:53:21,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:21,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:53:21,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:21,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:53:21,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:53:21,737 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:21,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 518 transitions, 6862 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:21,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:21,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:21,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:22,648 INFO L124 PetriNetUnfolderBase]: 3105/5272 cut-off events. [2024-06-03 18:53:22,648 INFO L125 PetriNetUnfolderBase]: For 512328/512328 co-relation queries the response was YES. [2024-06-03 18:53:22,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36865 conditions, 5272 events. 3105/5272 cut-off events. For 512328/512328 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 35864 event pairs, 613 based on Foata normal form. 1/5261 useless extension candidates. Maximal degree in co-relation 36684. Up to 4498 conditions per place. [2024-06-03 18:53:22,722 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 374 selfloop transitions, 159 changer transitions 0/540 dead transitions. [2024-06-03 18:53:22,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 540 transitions, 8666 flow [2024-06-03 18:53:22,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:53:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:53:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 18:53:22,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-03 18:53:22,723 INFO L175 Difference]: Start difference. First operand has 383 places, 518 transitions, 6862 flow. Second operand 6 states and 148 transitions. [2024-06-03 18:53:22,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 540 transitions, 8666 flow [2024-06-03 18:53:25,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 540 transitions, 8339 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 18:53:25,081 INFO L231 Difference]: Finished difference. Result has 383 places, 524 transitions, 6969 flow [2024-06-03 18:53:25,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6969, PETRI_PLACES=383, PETRI_TRANSITIONS=524} [2024-06-03 18:53:25,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-03 18:53:25,081 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 524 transitions, 6969 flow [2024-06-03 18:53:25,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:25,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:25,082 INFO 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] [2024-06-03 18:53:25,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 18:53:25,082 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)] === [2024-06-03 18:53:25,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:25,082 INFO L85 PathProgramCache]: Analyzing trace with hash -2018434278, now seen corresponding path program 11 times [2024-06-03 18:53:25,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:25,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659253257] [2024-06-03 18:53:25,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:25,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:25,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:25,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:25,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659253257] [2024-06-03 18:53:25,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659253257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:25,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:25,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:25,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710150247] [2024-06-03 18:53:25,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:25,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:25,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:25,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:25,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:25,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:25,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 524 transitions, 6969 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:25,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:25,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:25,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:26,207 INFO L124 PetriNetUnfolderBase]: 3115/5311 cut-off events. [2024-06-03 18:53:26,207 INFO L125 PetriNetUnfolderBase]: For 504070/504076 co-relation queries the response was YES. [2024-06-03 18:53:26,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36894 conditions, 5311 events. 3115/5311 cut-off events. For 504070/504076 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36279 event pairs, 608 based on Foata normal form. 5/5310 useless extension candidates. Maximal degree in co-relation 36715. Up to 4508 conditions per place. [2024-06-03 18:53:26,287 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 386 selfloop transitions, 158 changer transitions 0/551 dead transitions. [2024-06-03 18:53:26,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 551 transitions, 8805 flow [2024-06-03 18:53:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 18:53:26,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5684523809523809 [2024-06-03 18:53:26,289 INFO L175 Difference]: Start difference. First operand has 383 places, 524 transitions, 6969 flow. Second operand 8 states and 191 transitions. [2024-06-03 18:53:26,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 551 transitions, 8805 flow [2024-06-03 18:53:28,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 551 transitions, 8547 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 18:53:28,330 INFO L231 Difference]: Finished difference. Result has 389 places, 530 transitions, 7151 flow [2024-06-03 18:53:28,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6736, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7151, PETRI_PLACES=389, PETRI_TRANSITIONS=530} [2024-06-03 18:53:28,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-03 18:53:28,330 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 530 transitions, 7151 flow [2024-06-03 18:53:28,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:28,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:28,331 INFO 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] [2024-06-03 18:53:28,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 18:53:28,331 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)] === [2024-06-03 18:53:28,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:28,331 INFO L85 PathProgramCache]: Analyzing trace with hash 28502364, now seen corresponding path program 12 times [2024-06-03 18:53:28,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:28,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485716513] [2024-06-03 18:53:28,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:28,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:28,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:28,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485716513] [2024-06-03 18:53:28,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485716513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:28,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:28,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:28,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224398994] [2024-06-03 18:53:28,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:28,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:28,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:28,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:28,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 530 transitions, 7151 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:28,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:28,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:28,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:29,461 INFO L124 PetriNetUnfolderBase]: 3112/5307 cut-off events. [2024-06-03 18:53:29,462 INFO L125 PetriNetUnfolderBase]: For 500499/500505 co-relation queries the response was YES. [2024-06-03 18:53:29,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36811 conditions, 5307 events. 3112/5307 cut-off events. For 500499/500505 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 36209 event pairs, 611 based on Foata normal form. 5/5306 useless extension candidates. Maximal degree in co-relation 36631. Up to 4505 conditions per place. [2024-06-03 18:53:29,539 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 385 selfloop transitions, 158 changer transitions 0/550 dead transitions. [2024-06-03 18:53:29,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 550 transitions, 8685 flow [2024-06-03 18:53:29,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:29,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:29,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 18:53:29,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2024-06-03 18:53:29,540 INFO L175 Difference]: Start difference. First operand has 389 places, 530 transitions, 7151 flow. Second operand 8 states and 190 transitions. [2024-06-03 18:53:29,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 550 transitions, 8685 flow [2024-06-03 18:53:32,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 550 transitions, 8465 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 18:53:32,177 INFO L231 Difference]: Finished difference. Result has 393 places, 530 transitions, 7253 flow [2024-06-03 18:53:32,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6931, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7253, PETRI_PLACES=393, PETRI_TRANSITIONS=530} [2024-06-03 18:53:32,178 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-03 18:53:32,178 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 530 transitions, 7253 flow [2024-06-03 18:53:32,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:32,178 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:32,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:53:32,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 18:53:32,178 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)] === [2024-06-03 18:53:32,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:32,178 INFO L85 PathProgramCache]: Analyzing trace with hash 1890764168, now seen corresponding path program 12 times [2024-06-03 18:53:32,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:32,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891077383] [2024-06-03 18:53:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:32,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:32,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:32,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:32,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891077383] [2024-06-03 18:53:32,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891077383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:32,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:32,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:32,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911784538] [2024-06-03 18:53:32,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:32,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:32,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:32,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:32,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:32,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:32,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 530 transitions, 7253 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:32,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:32,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:32,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:33,374 INFO L124 PetriNetUnfolderBase]: 3125/5329 cut-off events. [2024-06-03 18:53:33,375 INFO L125 PetriNetUnfolderBase]: For 516257/516263 co-relation queries the response was YES. [2024-06-03 18:53:33,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37142 conditions, 5329 events. 3125/5329 cut-off events. For 516257/516263 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 36393 event pairs, 585 based on Foata normal form. 5/5328 useless extension candidates. Maximal degree in co-relation 36960. Up to 4662 conditions per place. [2024-06-03 18:53:33,453 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 472 selfloop transitions, 79 changer transitions 0/558 dead transitions. [2024-06-03 18:53:33,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 558 transitions, 8875 flow [2024-06-03 18:53:33,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:53:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:53:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-03 18:53:33,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2024-06-03 18:53:33,454 INFO L175 Difference]: Start difference. First operand has 393 places, 530 transitions, 7253 flow. Second operand 10 states and 222 transitions. [2024-06-03 18:53:33,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 558 transitions, 8875 flow [2024-06-03 18:53:35,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 558 transitions, 8441 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:53:35,922 INFO L231 Difference]: Finished difference. Result has 396 places, 536 transitions, 7064 flow [2024-06-03 18:53:35,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6819, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7064, PETRI_PLACES=396, PETRI_TRANSITIONS=536} [2024-06-03 18:53:35,922 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-03 18:53:35,923 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 536 transitions, 7064 flow [2024-06-03 18:53:35,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:35,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:35,923 INFO 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] [2024-06-03 18:53:35,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 18:53:35,923 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)] === [2024-06-03 18:53:35,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:35,924 INFO L85 PathProgramCache]: Analyzing trace with hash -251737622, now seen corresponding path program 1 times [2024-06-03 18:53:35,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:35,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864399921] [2024-06-03 18:53:35,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:35,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:35,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:36,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:36,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:36,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864399921] [2024-06-03 18:53:36,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864399921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:36,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:36,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:36,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039987549] [2024-06-03 18:53:36,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:36,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:36,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:36,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:36,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:36,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:36,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 536 transitions, 7064 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:36,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:36,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:36,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:37,228 INFO L124 PetriNetUnfolderBase]: 3260/5554 cut-off events. [2024-06-03 18:53:37,229 INFO L125 PetriNetUnfolderBase]: For 656258/656264 co-relation queries the response was YES. [2024-06-03 18:53:37,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39726 conditions, 5554 events. 3260/5554 cut-off events. For 656258/656264 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 38099 event pairs, 553 based on Foata normal form. 16/5564 useless extension candidates. Maximal degree in co-relation 39543. Up to 4446 conditions per place. [2024-06-03 18:53:37,304 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 400 selfloop transitions, 174 changer transitions 0/581 dead transitions. [2024-06-03 18:53:37,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 581 transitions, 9050 flow [2024-06-03 18:53:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 18:53:37,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-03 18:53:37,305 INFO L175 Difference]: Start difference. First operand has 396 places, 536 transitions, 7064 flow. Second operand 8 states and 204 transitions. [2024-06-03 18:53:37,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 581 transitions, 9050 flow [2024-06-03 18:53:40,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 581 transitions, 8890 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 18:53:40,151 INFO L231 Difference]: Finished difference. Result has 398 places, 543 transitions, 7379 flow [2024-06-03 18:53:40,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7379, PETRI_PLACES=398, PETRI_TRANSITIONS=543} [2024-06-03 18:53:40,152 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-03 18:53:40,152 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 543 transitions, 7379 flow [2024-06-03 18:53:40,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:40,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:40,152 INFO 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] [2024-06-03 18:53:40,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 18:53:40,152 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)] === [2024-06-03 18:53:40,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:40,152 INFO L85 PathProgramCache]: Analyzing trace with hash 13959658, now seen corresponding path program 2 times [2024-06-03 18:53:40,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:40,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064359139] [2024-06-03 18:53:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:40,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:40,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:40,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:40,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:40,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064359139] [2024-06-03 18:53:40,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064359139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:40,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:40,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:40,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224142169] [2024-06-03 18:53:40,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:40,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:40,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:40,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:40,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:40,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:40,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 543 transitions, 7379 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:40,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:40,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:40,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:41,402 INFO L124 PetriNetUnfolderBase]: 3408/5782 cut-off events. [2024-06-03 18:53:41,402 INFO L125 PetriNetUnfolderBase]: For 761269/761275 co-relation queries the response was YES. [2024-06-03 18:53:41,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43338 conditions, 5782 events. 3408/5782 cut-off events. For 761269/761275 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39673 event pairs, 671 based on Foata normal form. 16/5792 useless extension candidates. Maximal degree in co-relation 43154. Up to 4800 conditions per place. [2024-06-03 18:53:41,485 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 170 changer transitions 0/584 dead transitions. [2024-06-03 18:53:41,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 584 transitions, 9381 flow [2024-06-03 18:53:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:41,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 18:53:41,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5982142857142857 [2024-06-03 18:53:41,486 INFO L175 Difference]: Start difference. First operand has 398 places, 543 transitions, 7379 flow. Second operand 8 states and 201 transitions. [2024-06-03 18:53:41,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 584 transitions, 9381 flow [2024-06-03 18:53:44,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 584 transitions, 9135 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-03 18:53:44,731 INFO L231 Difference]: Finished difference. Result has 404 places, 550 transitions, 7622 flow [2024-06-03 18:53:44,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7141, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7622, PETRI_PLACES=404, PETRI_TRANSITIONS=550} [2024-06-03 18:53:44,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-03 18:53:44,732 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 550 transitions, 7622 flow [2024-06-03 18:53:44,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:44,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:44,732 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] [2024-06-03 18:53:44,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 18:53:44,732 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)] === [2024-06-03 18:53:44,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:44,732 INFO L85 PathProgramCache]: Analyzing trace with hash 14286088, now seen corresponding path program 3 times [2024-06-03 18:53:44,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:44,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240780912] [2024-06-03 18:53:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:44,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:44,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:44,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:44,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:44,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240780912] [2024-06-03 18:53:44,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240780912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:44,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:44,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:44,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522162234] [2024-06-03 18:53:44,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:44,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:44,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:44,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:44,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:44,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:44,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 550 transitions, 7622 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:44,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:44,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:44,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:45,963 INFO L124 PetriNetUnfolderBase]: 3372/5730 cut-off events. [2024-06-03 18:53:45,963 INFO L125 PetriNetUnfolderBase]: For 708998/709004 co-relation queries the response was YES. [2024-06-03 18:53:46,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41740 conditions, 5730 events. 3372/5730 cut-off events. For 708998/709004 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 39370 event pairs, 667 based on Foata normal form. 20/5744 useless extension candidates. Maximal degree in co-relation 41553. Up to 4844 conditions per place. [2024-06-03 18:53:46,047 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 407 selfloop transitions, 166 changer transitions 0/580 dead transitions. [2024-06-03 18:53:46,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 580 transitions, 9272 flow [2024-06-03 18:53:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 18:53:46,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-03 18:53:46,048 INFO L175 Difference]: Start difference. First operand has 404 places, 550 transitions, 7622 flow. Second operand 8 states and 197 transitions. [2024-06-03 18:53:46,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 580 transitions, 9272 flow [2024-06-03 18:53:48,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 580 transitions, 9020 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 18:53:48,836 INFO L231 Difference]: Finished difference. Result has 408 places, 550 transitions, 7708 flow [2024-06-03 18:53:48,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7370, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7708, PETRI_PLACES=408, PETRI_TRANSITIONS=550} [2024-06-03 18:53:48,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-03 18:53:48,837 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 550 transitions, 7708 flow [2024-06-03 18:53:48,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:48,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:48,837 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] [2024-06-03 18:53:48,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 18:53:48,837 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)] === [2024-06-03 18:53:48,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:48,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1071212250, now seen corresponding path program 4 times [2024-06-03 18:53:48,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:48,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016179012] [2024-06-03 18:53:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:48,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:48,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:48,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:48,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:48,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016179012] [2024-06-03 18:53:48,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016179012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:48,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:48,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:48,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493577732] [2024-06-03 18:53:48,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:48,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:48,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:48,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:48,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:49,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:49,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 550 transitions, 7708 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:49,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:49,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:49,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:50,340 INFO L124 PetriNetUnfolderBase]: 3428/5818 cut-off events. [2024-06-03 18:53:50,340 INFO L125 PetriNetUnfolderBase]: For 721631/721637 co-relation queries the response was YES. [2024-06-03 18:53:50,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42541 conditions, 5818 events. 3428/5818 cut-off events. For 721631/721637 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 40039 event pairs, 675 based on Foata normal form. 20/5832 useless extension candidates. Maximal degree in co-relation 42352. Up to 4932 conditions per place. [2024-06-03 18:53:50,413 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 161 changer transitions 0/576 dead transitions. [2024-06-03 18:53:50,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 576 transitions, 9388 flow [2024-06-03 18:53:50,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:50,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:50,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 18:53:50,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 18:53:50,414 INFO L175 Difference]: Start difference. First operand has 408 places, 550 transitions, 7708 flow. Second operand 8 states and 192 transitions. [2024-06-03 18:53:50,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 576 transitions, 9388 flow [2024-06-03 18:53:53,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 576 transitions, 9054 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 18:53:53,830 INFO L231 Difference]: Finished difference. Result has 410 places, 552 transitions, 7756 flow [2024-06-03 18:53:53,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7756, PETRI_PLACES=410, PETRI_TRANSITIONS=552} [2024-06-03 18:53:53,831 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-03 18:53:53,831 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 552 transitions, 7756 flow [2024-06-03 18:53:53,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:53,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:53,831 INFO 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] [2024-06-03 18:53:53,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 18:53:53,831 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)] === [2024-06-03 18:53:53,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1442110200, now seen corresponding path program 5 times [2024-06-03 18:53:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:53,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329800653] [2024-06-03 18:53:53,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:53,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:53,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:53,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329800653] [2024-06-03 18:53:53,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329800653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:53,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:53,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:53,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182546290] [2024-06-03 18:53:53,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:53,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:53,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:53,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:53,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:53,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 552 transitions, 7756 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:53,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:53,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:53,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:55,134 INFO L124 PetriNetUnfolderBase]: 3484/5914 cut-off events. [2024-06-03 18:53:55,134 INFO L125 PetriNetUnfolderBase]: For 736046/736052 co-relation queries the response was YES. [2024-06-03 18:53:55,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43313 conditions, 5914 events. 3484/5914 cut-off events. For 736046/736052 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 40774 event pairs, 687 based on Foata normal form. 20/5928 useless extension candidates. Maximal degree in co-relation 43123. Up to 5020 conditions per place. [2024-06-03 18:53:55,220 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 411 selfloop transitions, 160 changer transitions 0/578 dead transitions. [2024-06-03 18:53:55,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 578 transitions, 9448 flow [2024-06-03 18:53:55,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:53:55,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:53:55,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 18:53:55,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5744047619047619 [2024-06-03 18:53:55,221 INFO L175 Difference]: Start difference. First operand has 410 places, 552 transitions, 7756 flow. Second operand 8 states and 193 transitions. [2024-06-03 18:53:55,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 578 transitions, 9448 flow [2024-06-03 18:53:58,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 578 transitions, 9100 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 18:53:58,444 INFO L231 Difference]: Finished difference. Result has 412 places, 554 transitions, 7792 flow [2024-06-03 18:53:58,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7408, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7792, PETRI_PLACES=412, PETRI_TRANSITIONS=554} [2024-06-03 18:53:58,445 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-03 18:53:58,445 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 554 transitions, 7792 flow [2024-06-03 18:53:58,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:58,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:53:58,445 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, 1] [2024-06-03 18:53:58,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 18:53:58,446 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)] === [2024-06-03 18:53:58,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:53:58,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1442436630, now seen corresponding path program 6 times [2024-06-03 18:53:58,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:53:58,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497688918] [2024-06-03 18:53:58,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:53:58,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:53:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:53:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:53:58,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:53:58,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497688918] [2024-06-03 18:53:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497688918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:53:58,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:53:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:53:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978495743] [2024-06-03 18:53:58,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:53:58,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:53:58,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:53:58,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:53:58,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:53:58,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:53:58,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 554 transitions, 7792 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:53:58,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:53:58,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:53:58,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:53:59,909 INFO L124 PetriNetUnfolderBase]: 3540/6002 cut-off events. [2024-06-03 18:53:59,910 INFO L125 PetriNetUnfolderBase]: For 727312/727318 co-relation queries the response was YES. [2024-06-03 18:53:59,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43868 conditions, 6002 events. 3540/6002 cut-off events. For 727312/727318 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 41455 event pairs, 683 based on Foata normal form. 16/6012 useless extension candidates. Maximal degree in co-relation 43677. Up to 4984 conditions per place. [2024-06-03 18:54:00,002 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 166 changer transitions 0/586 dead transitions. [2024-06-03 18:54:00,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 586 transitions, 9554 flow [2024-06-03 18:54:00,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:54:00,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:54:00,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 18:54:00,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5803571428571429 [2024-06-03 18:54:00,003 INFO L175 Difference]: Start difference. First operand has 412 places, 554 transitions, 7792 flow. Second operand 8 states and 195 transitions. [2024-06-03 18:54:00,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 586 transitions, 9554 flow [2024-06-03 18:54:03,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 586 transitions, 9204 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 18:54:03,470 INFO L231 Difference]: Finished difference. Result has 415 places, 559 transitions, 7891 flow [2024-06-03 18:54:03,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7442, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7891, PETRI_PLACES=415, PETRI_TRANSITIONS=559} [2024-06-03 18:54:03,471 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-03 18:54:03,471 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 559 transitions, 7891 flow [2024-06-03 18:54:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:03,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:03,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:54:03,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 18:54:03,471 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)] === [2024-06-03 18:54:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:03,472 INFO L85 PathProgramCache]: Analyzing trace with hash -196720386, now seen corresponding path program 1 times [2024-06-03 18:54:03,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:03,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623063714] [2024-06-03 18:54:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:03,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:03,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:03,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623063714] [2024-06-03 18:54:03,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623063714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:03,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:03,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:54:03,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721777308] [2024-06-03 18:54:03,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:03,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:54:03,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:54:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:54:03,635 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:03,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 559 transitions, 7891 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:03,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:03,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:03,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:05,004 INFO L124 PetriNetUnfolderBase]: 3580/6074 cut-off events. [2024-06-03 18:54:05,004 INFO L125 PetriNetUnfolderBase]: For 741083/741089 co-relation queries the response was YES. [2024-06-03 18:54:05,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44392 conditions, 6074 events. 3580/6074 cut-off events. For 741083/741089 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 42034 event pairs, 695 based on Foata normal form. 16/6084 useless extension candidates. Maximal degree in co-relation 44199. Up to 4984 conditions per place. [2024-06-03 18:54:05,083 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 412 selfloop transitions, 169 changer transitions 0/588 dead transitions. [2024-06-03 18:54:05,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 588 transitions, 9621 flow [2024-06-03 18:54:05,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:54:05,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:54:05,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 18:54:05,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5773809523809523 [2024-06-03 18:54:05,084 INFO L175 Difference]: Start difference. First operand has 415 places, 559 transitions, 7891 flow. Second operand 8 states and 194 transitions. [2024-06-03 18:54:05,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 588 transitions, 9621 flow [2024-06-03 18:54:08,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 588 transitions, 9252 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 18:54:08,416 INFO L231 Difference]: Finished difference. Result has 418 places, 561 transitions, 7919 flow [2024-06-03 18:54:08,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7522, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7919, PETRI_PLACES=418, PETRI_TRANSITIONS=561} [2024-06-03 18:54:08,417 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-03 18:54:08,417 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 561 transitions, 7919 flow [2024-06-03 18:54:08,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:08,417 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:08,417 INFO 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] [2024-06-03 18:54:08,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 18:54:08,417 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)] === [2024-06-03 18:54:08,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:08,417 INFO L85 PathProgramCache]: Analyzing trace with hash -2144049904, now seen corresponding path program 1 times [2024-06-03 18:54:08,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:08,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299650162] [2024-06-03 18:54:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:08,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:08,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:08,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:08,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299650162] [2024-06-03 18:54:08,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299650162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:08,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:08,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:54:08,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135762731] [2024-06-03 18:54:08,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:08,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:54:08,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:08,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:54:08,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:54:08,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:08,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 561 transitions, 7919 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:08,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:08,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:08,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:09,761 INFO L124 PetriNetUnfolderBase]: 3588/6083 cut-off events. [2024-06-03 18:54:09,761 INFO L125 PetriNetUnfolderBase]: For 692972/692978 co-relation queries the response was YES. [2024-06-03 18:54:09,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44504 conditions, 6083 events. 3588/6083 cut-off events. For 692972/692978 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 42029 event pairs, 674 based on Foata normal form. 6/6084 useless extension candidates. Maximal degree in co-relation 44310. Up to 5427 conditions per place. [2024-06-03 18:54:09,857 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 508 selfloop transitions, 67 changer transitions 0/582 dead transitions. [2024-06-03 18:54:09,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 582 transitions, 9179 flow [2024-06-03 18:54:09,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:54:09,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:54:09,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 18:54:09,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-03 18:54:09,858 INFO L175 Difference]: Start difference. First operand has 418 places, 561 transitions, 7919 flow. Second operand 8 states and 182 transitions. [2024-06-03 18:54:09,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 582 transitions, 9179 flow [2024-06-03 18:54:13,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 582 transitions, 8804 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 18:54:13,668 INFO L231 Difference]: Finished difference. Result has 420 places, 563 transitions, 7751 flow [2024-06-03 18:54:13,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7544, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7751, PETRI_PLACES=420, PETRI_TRANSITIONS=563} [2024-06-03 18:54:13,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-03 18:54:13,668 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 563 transitions, 7751 flow [2024-06-03 18:54:13,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:13,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:13,669 INFO 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] [2024-06-03 18:54:13,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 18:54:13,669 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)] === [2024-06-03 18:54:13,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:13,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1347222244, now seen corresponding path program 2 times [2024-06-03 18:54:13,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:13,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610915295] [2024-06-03 18:54:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:13,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:13,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:13,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:13,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:13,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610915295] [2024-06-03 18:54:13,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610915295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:13,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:13,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:54:13,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579770349] [2024-06-03 18:54:13,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:13,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:54:13,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:13,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:54:13,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:54:13,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:13,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 563 transitions, 7751 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:13,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:13,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:13,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:14,976 INFO L124 PetriNetUnfolderBase]: 3596/6091 cut-off events. [2024-06-03 18:54:14,976 INFO L125 PetriNetUnfolderBase]: For 703269/703275 co-relation queries the response was YES. [2024-06-03 18:54:15,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44228 conditions, 6091 events. 3596/6091 cut-off events. For 703269/703275 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42089 event pairs, 666 based on Foata normal form. 6/6092 useless extension candidates. Maximal degree in co-relation 44033. Up to 5419 conditions per place. [2024-06-03 18:54:15,069 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 507 selfloop transitions, 72 changer transitions 0/586 dead transitions. [2024-06-03 18:54:15,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 586 transitions, 9027 flow [2024-06-03 18:54:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:54:15,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:54:15,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 18:54:15,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317460317460317 [2024-06-03 18:54:15,070 INFO L175 Difference]: Start difference. First operand has 420 places, 563 transitions, 7751 flow. Second operand 9 states and 201 transitions. [2024-06-03 18:54:15,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 586 transitions, 9027 flow [2024-06-03 18:54:18,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 586 transitions, 8836 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 18:54:18,869 INFO L231 Difference]: Finished difference. Result has 423 places, 565 transitions, 7781 flow [2024-06-03 18:54:18,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7560, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7781, PETRI_PLACES=423, PETRI_TRANSITIONS=565} [2024-06-03 18:54:18,869 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-03 18:54:18,869 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 565 transitions, 7781 flow [2024-06-03 18:54:18,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:18,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:18,870 INFO 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] [2024-06-03 18:54:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 18:54:18,870 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)] === [2024-06-03 18:54:18,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:18,870 INFO L85 PathProgramCache]: Analyzing trace with hash 2096488546, now seen corresponding path program 13 times [2024-06-03 18:54:18,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:18,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929591484] [2024-06-03 18:54:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:18,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:18,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929591484] [2024-06-03 18:54:18,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929591484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:18,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:18,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:18,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350172661] [2024-06-03 18:54:18,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:18,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:18,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:18,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:18,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:19,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:19,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 565 transitions, 7781 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:19,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:19,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:19,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:20,311 INFO L124 PetriNetUnfolderBase]: 3617/6129 cut-off events. [2024-06-03 18:54:20,311 INFO L125 PetriNetUnfolderBase]: For 722763/722769 co-relation queries the response was YES. [2024-06-03 18:54:20,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44719 conditions, 6129 events. 3617/6129 cut-off events. For 722763/722769 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42408 event pairs, 723 based on Foata normal form. 1/6122 useless extension candidates. Maximal degree in co-relation 44523. Up to 5226 conditions per place. [2024-06-03 18:54:20,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 431 selfloop transitions, 165 changer transitions 0/603 dead transitions. [2024-06-03 18:54:20,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 603 transitions, 9817 flow [2024-06-03 18:54:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:54:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:54:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 18:54:20,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 18:54:20,399 INFO L175 Difference]: Start difference. First operand has 423 places, 565 transitions, 7781 flow. Second operand 7 states and 179 transitions. [2024-06-03 18:54:20,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 603 transitions, 9817 flow [2024-06-03 18:54:24,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 603 transitions, 9612 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-03 18:54:24,018 INFO L231 Difference]: Finished difference. Result has 423 places, 574 transitions, 8018 flow [2024-06-03 18:54:24,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7576, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8018, PETRI_PLACES=423, PETRI_TRANSITIONS=574} [2024-06-03 18:54:24,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-03 18:54:24,019 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 574 transitions, 8018 flow [2024-06-03 18:54:24,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:24,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:24,020 INFO 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] [2024-06-03 18:54:24,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 18:54:24,020 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)] === [2024-06-03 18:54:24,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:24,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2096608516, now seen corresponding path program 14 times [2024-06-03 18:54:24,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:24,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160996716] [2024-06-03 18:54:24,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:24,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:24,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160996716] [2024-06-03 18:54:24,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160996716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:24,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:24,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:24,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113332340] [2024-06-03 18:54:24,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:24,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:24,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:24,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:24,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 574 transitions, 8018 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:24,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:24,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:24,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:25,395 INFO L124 PetriNetUnfolderBase]: 3614/6127 cut-off events. [2024-06-03 18:54:25,396 INFO L125 PetriNetUnfolderBase]: For 728724/728730 co-relation queries the response was YES. [2024-06-03 18:54:25,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44835 conditions, 6127 events. 3614/6127 cut-off events. For 728724/728730 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 42468 event pairs, 683 based on Foata normal form. 5/6126 useless extension candidates. Maximal degree in co-relation 44638. Up to 5437 conditions per place. [2024-06-03 18:54:25,489 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 518 selfloop transitions, 72 changer transitions 0/597 dead transitions. [2024-06-03 18:54:25,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 597 transitions, 9256 flow [2024-06-03 18:54:25,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:54:25,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:54:25,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 18:54:25,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 18:54:25,490 INFO L175 Difference]: Start difference. First operand has 423 places, 574 transitions, 8018 flow. Second operand 7 states and 170 transitions. [2024-06-03 18:54:25,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 597 transitions, 9256 flow [2024-06-03 18:54:29,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 597 transitions, 8892 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 18:54:29,659 INFO L231 Difference]: Finished difference. Result has 426 places, 574 transitions, 7804 flow [2024-06-03 18:54:29,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7654, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7804, PETRI_PLACES=426, PETRI_TRANSITIONS=574} [2024-06-03 18:54:29,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-03 18:54:29,660 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 574 transitions, 7804 flow [2024-06-03 18:54:29,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:29,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:29,660 INFO 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] [2024-06-03 18:54:29,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 18:54:29,660 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)] === [2024-06-03 18:54:29,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:29,661 INFO L85 PathProgramCache]: Analyzing trace with hash -210019862, now seen corresponding path program 15 times [2024-06-03 18:54:29,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:29,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175246379] [2024-06-03 18:54:29,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:29,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:29,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:29,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:29,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175246379] [2024-06-03 18:54:29,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175246379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:29,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:29,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:29,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382989421] [2024-06-03 18:54:29,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:29,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:29,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:29,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:29,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:29,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:29,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 574 transitions, 7804 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:29,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:29,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:29,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:30,933 INFO L124 PetriNetUnfolderBase]: 3635/6148 cut-off events. [2024-06-03 18:54:30,933 INFO L125 PetriNetUnfolderBase]: For 754906/754912 co-relation queries the response was YES. [2024-06-03 18:54:31,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45045 conditions, 6148 events. 3635/6148 cut-off events. For 754906/754912 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 42636 event pairs, 714 based on Foata normal form. 5/6141 useless extension candidates. Maximal degree in co-relation 44847. Up to 5247 conditions per place. [2024-06-03 18:54:31,026 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 428 selfloop transitions, 170 changer transitions 0/605 dead transitions. [2024-06-03 18:54:31,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 605 transitions, 9606 flow [2024-06-03 18:54:31,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:54:31,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:54:31,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 18:54:31,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 18:54:31,027 INFO L175 Difference]: Start difference. First operand has 426 places, 574 transitions, 7804 flow. Second operand 7 states and 169 transitions. [2024-06-03 18:54:31,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 605 transitions, 9606 flow [2024-06-03 18:54:34,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 605 transitions, 9450 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 18:54:34,918 INFO L231 Difference]: Finished difference. Result has 426 places, 583 transitions, 8094 flow [2024-06-03 18:54:34,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7648, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8094, PETRI_PLACES=426, PETRI_TRANSITIONS=583} [2024-06-03 18:54:34,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-03 18:54:34,919 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 583 transitions, 8094 flow [2024-06-03 18:54:34,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:34,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:34,919 INFO 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] [2024-06-03 18:54:34,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 18:54:34,919 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)] === [2024-06-03 18:54:34,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:34,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1161480974, now seen corresponding path program 16 times [2024-06-03 18:54:34,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:34,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855705242] [2024-06-03 18:54:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:34,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:34,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:35,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:35,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:35,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855705242] [2024-06-03 18:54:35,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855705242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:35,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357510911] [2024-06-03 18:54:35,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:35,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:35,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:35,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 583 transitions, 8094 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:35,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:35,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:35,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:36,433 INFO L124 PetriNetUnfolderBase]: 3640/6167 cut-off events. [2024-06-03 18:54:36,433 INFO L125 PetriNetUnfolderBase]: For 766301/766307 co-relation queries the response was YES. [2024-06-03 18:54:36,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45471 conditions, 6167 events. 3640/6167 cut-off events. For 766301/766307 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42710 event pairs, 723 based on Foata normal form. 1/6160 useless extension candidates. Maximal degree in co-relation 45272. Up to 5253 conditions per place. [2024-06-03 18:54:36,529 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 434 selfloop transitions, 172 changer transitions 0/613 dead transitions. [2024-06-03 18:54:36,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 613 transitions, 10324 flow [2024-06-03 18:54:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:54:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:54:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 18:54:36,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-03 18:54:36,530 INFO L175 Difference]: Start difference. First operand has 426 places, 583 transitions, 8094 flow. Second operand 7 states and 177 transitions. [2024-06-03 18:54:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 613 transitions, 10324 flow [2024-06-03 18:54:41,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 613 transitions, 10060 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 18:54:41,249 INFO L231 Difference]: Finished difference. Result has 430 places, 586 transitions, 8220 flow [2024-06-03 18:54:41,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7841, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8220, PETRI_PLACES=430, PETRI_TRANSITIONS=586} [2024-06-03 18:54:41,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 18:54:41,250 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 586 transitions, 8220 flow [2024-06-03 18:54:41,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:41,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:41,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:54:41,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 18:54:41,250 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)] === [2024-06-03 18:54:41,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:41,250 INFO L85 PathProgramCache]: Analyzing trace with hash -2087514980, now seen corresponding path program 17 times [2024-06-03 18:54:41,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:41,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635175550] [2024-06-03 18:54:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:41,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:41,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:41,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:41,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:41,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635175550] [2024-06-03 18:54:41,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635175550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:41,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:41,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:41,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104446601] [2024-06-03 18:54:41,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:41,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:41,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:41,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:41,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:41,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:41,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 586 transitions, 8220 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:41,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:41,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:41,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:42,551 INFO L124 PetriNetUnfolderBase]: 3637/6163 cut-off events. [2024-06-03 18:54:42,551 INFO L125 PetriNetUnfolderBase]: For 772968/772974 co-relation queries the response was YES. [2024-06-03 18:54:42,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45464 conditions, 6163 events. 3637/6163 cut-off events. For 772968/772974 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 42724 event pairs, 721 based on Foata normal form. 1/6156 useless extension candidates. Maximal degree in co-relation 45264. Up to 5250 conditions per place. [2024-06-03 18:54:42,647 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 170 changer transitions 0/609 dead transitions. [2024-06-03 18:54:42,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 609 transitions, 10170 flow [2024-06-03 18:54:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:54:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:54:42,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:54:42,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:54:42,648 INFO L175 Difference]: Start difference. First operand has 430 places, 586 transitions, 8220 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:54:42,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 609 transitions, 10170 flow [2024-06-03 18:54:47,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 609 transitions, 9663 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 18:54:47,199 INFO L231 Difference]: Finished difference. Result has 431 places, 586 transitions, 8059 flow [2024-06-03 18:54:47,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7713, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8059, PETRI_PLACES=431, PETRI_TRANSITIONS=586} [2024-06-03 18:54:47,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-03 18:54:47,199 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 586 transitions, 8059 flow [2024-06-03 18:54:47,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:47,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:47,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:54:47,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 18:54:47,200 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)] === [2024-06-03 18:54:47,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash -321401828, now seen corresponding path program 18 times [2024-06-03 18:54:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:47,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484349314] [2024-06-03 18:54:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:47,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:47,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:47,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484349314] [2024-06-03 18:54:47,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484349314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:47,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:47,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:47,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779705689] [2024-06-03 18:54:47,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:47,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:47,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:47,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:47,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:47,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:47,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 586 transitions, 8059 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:47,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:47,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:47,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:48,488 INFO L124 PetriNetUnfolderBase]: 3642/6162 cut-off events. [2024-06-03 18:54:48,488 INFO L125 PetriNetUnfolderBase]: For 785731/785737 co-relation queries the response was YES. [2024-06-03 18:54:48,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 6162 events. 3642/6162 cut-off events. For 785731/785737 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42732 event pairs, 714 based on Foata normal form. 5/6155 useless extension candidates. Maximal degree in co-relation 45289. Up to 5256 conditions per place. [2024-06-03 18:54:48,583 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 428 selfloop transitions, 173 changer transitions 0/608 dead transitions. [2024-06-03 18:54:48,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 608 transitions, 9803 flow [2024-06-03 18:54:48,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:54:48,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:54:48,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 18:54:48,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5680272108843537 [2024-06-03 18:54:48,584 INFO L175 Difference]: Start difference. First operand has 431 places, 586 transitions, 8059 flow. Second operand 7 states and 167 transitions. [2024-06-03 18:54:48,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 608 transitions, 9803 flow [2024-06-03 18:54:53,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 608 transitions, 9484 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 18:54:53,302 INFO L231 Difference]: Finished difference. Result has 434 places, 589 transitions, 8124 flow [2024-06-03 18:54:53,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7746, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8124, PETRI_PLACES=434, PETRI_TRANSITIONS=589} [2024-06-03 18:54:53,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 18:54:53,303 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 589 transitions, 8124 flow [2024-06-03 18:54:53,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:53,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:53,303 INFO 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] [2024-06-03 18:54:53,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 18:54:53,303 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)] === [2024-06-03 18:54:53,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:53,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1187112470, now seen corresponding path program 19 times [2024-06-03 18:54:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:53,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208656153] [2024-06-03 18:54:53,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:53,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208656153] [2024-06-03 18:54:53,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208656153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:53,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:53,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:53,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132482548] [2024-06-03 18:54:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:53,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:53,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:53,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:53,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 589 transitions, 8124 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:53,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:53,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:53,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:54:55,032 INFO L124 PetriNetUnfolderBase]: 3639/6158 cut-off events. [2024-06-03 18:54:55,032 INFO L125 PetriNetUnfolderBase]: For 791772/791778 co-relation queries the response was YES. [2024-06-03 18:54:55,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45480 conditions, 6158 events. 3639/6158 cut-off events. For 791772/791778 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42732 event pairs, 716 based on Foata normal form. 5/6151 useless extension candidates. Maximal degree in co-relation 45278. Up to 5253 conditions per place. [2024-06-03 18:54:55,123 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 420 selfloop transitions, 177 changer transitions 0/604 dead transitions. [2024-06-03 18:54:55,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 604 transitions, 9588 flow [2024-06-03 18:54:55,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:54:55,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:54:55,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 18:54:55,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5510204081632653 [2024-06-03 18:54:55,124 INFO L175 Difference]: Start difference. First operand has 434 places, 589 transitions, 8124 flow. Second operand 7 states and 162 transitions. [2024-06-03 18:54:55,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 604 transitions, 9588 flow [2024-06-03 18:54:59,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 604 transitions, 9253 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-03 18:54:59,841 INFO L231 Difference]: Finished difference. Result has 437 places, 589 transitions, 8149 flow [2024-06-03 18:54:59,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7789, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8149, PETRI_PLACES=437, PETRI_TRANSITIONS=589} [2024-06-03 18:54:59,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 18:54:59,842 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 589 transitions, 8149 flow [2024-06-03 18:54:59,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:59,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:54:59,842 INFO 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] [2024-06-03 18:54:59,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 18:54:59,842 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)] === [2024-06-03 18:54:59,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:54:59,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1230115602, now seen corresponding path program 20 times [2024-06-03 18:54:59,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:54:59,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736968387] [2024-06-03 18:54:59,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:54:59,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:54:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:54:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:54:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:54:59,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736968387] [2024-06-03 18:54:59,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736968387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:54:59,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:54:59,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:54:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383864379] [2024-06-03 18:54:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:54:59,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:54:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:54:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:54:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:54:59,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:54:59,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 589 transitions, 8149 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:54:59,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:54:59,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:54:59,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:01,569 INFO L124 PetriNetUnfolderBase]: 3636/6166 cut-off events. [2024-06-03 18:55:01,569 INFO L125 PetriNetUnfolderBase]: For 796221/796227 co-relation queries the response was YES. [2024-06-03 18:55:01,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45472 conditions, 6166 events. 3636/6166 cut-off events. For 796221/796227 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42878 event pairs, 683 based on Foata normal form. 5/6165 useless extension candidates. Maximal degree in co-relation 45269. Up to 5458 conditions per place. [2024-06-03 18:55:01,662 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 523 selfloop transitions, 79 changer transitions 0/609 dead transitions. [2024-06-03 18:55:01,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 609 transitions, 9637 flow [2024-06-03 18:55:01,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:55:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:55:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-03 18:55:01,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5370370370370371 [2024-06-03 18:55:01,663 INFO L175 Difference]: Start difference. First operand has 437 places, 589 transitions, 8149 flow. Second operand 9 states and 203 transitions. [2024-06-03 18:55:01,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 609 transitions, 9637 flow [2024-06-03 18:55:06,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 609 transitions, 9221 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 18:55:06,855 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 7897 flow [2024-06-03 18:55:06,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7897, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-03 18:55:06,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-03 18:55:06,855 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 7897 flow [2024-06-03 18:55:06,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:06,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:06,856 INFO 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] [2024-06-03 18:55:06,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 18:55:06,856 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)] === [2024-06-03 18:55:06,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:06,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1768107410, now seen corresponding path program 21 times [2024-06-03 18:55:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:06,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590370092] [2024-06-03 18:55:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:06,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:06,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:06,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:06,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590370092] [2024-06-03 18:55:06,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590370092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:06,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:06,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:55:06,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975404906] [2024-06-03 18:55:06,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:06,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:55:06,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:55:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:55:07,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:07,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 7897 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:07,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:07,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:07,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:08,560 INFO L124 PetriNetUnfolderBase]: 3633/6162 cut-off events. [2024-06-03 18:55:08,560 INFO L125 PetriNetUnfolderBase]: For 801080/801086 co-relation queries the response was YES. [2024-06-03 18:55:08,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45065 conditions, 6162 events. 3633/6162 cut-off events. For 801080/801086 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 42764 event pairs, 681 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 44862. Up to 5455 conditions per place. [2024-06-03 18:55:08,655 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 521 selfloop transitions, 78 changer transitions 0/606 dead transitions. [2024-06-03 18:55:08,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 606 transitions, 9137 flow [2024-06-03 18:55:08,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:55:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:55:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 18:55:08,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5612244897959183 [2024-06-03 18:55:08,656 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 7897 flow. Second operand 7 states and 165 transitions. [2024-06-03 18:55:08,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 606 transitions, 9137 flow [2024-06-03 18:55:13,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 606 transitions, 8992 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:55:13,466 INFO L231 Difference]: Finished difference. Result has 441 places, 589 transitions, 7914 flow [2024-06-03 18:55:13,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7752, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7914, PETRI_PLACES=441, PETRI_TRANSITIONS=589} [2024-06-03 18:55:13,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 18:55:13,467 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 589 transitions, 7914 flow [2024-06-03 18:55:13,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:13,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:13,468 INFO 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] [2024-06-03 18:55:13,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 18:55:13,469 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)] === [2024-06-03 18:55:13,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:13,469 INFO L85 PathProgramCache]: Analyzing trace with hash -115104022, now seen corresponding path program 22 times [2024-06-03 18:55:13,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:13,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729606015] [2024-06-03 18:55:13,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:13,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:13,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:13,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:13,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729606015] [2024-06-03 18:55:13,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729606015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:13,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:13,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:55:13,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433374765] [2024-06-03 18:55:13,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:13,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:55:13,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:13,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:55:13,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:55:13,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:13,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 589 transitions, 7914 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:13,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:13,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:13,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:15,059 INFO L124 PetriNetUnfolderBase]: 3630/6146 cut-off events. [2024-06-03 18:55:15,059 INFO L125 PetriNetUnfolderBase]: For 808740/808746 co-relation queries the response was YES. [2024-06-03 18:55:15,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45037 conditions, 6146 events. 3630/6146 cut-off events. For 808740/808746 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42678 event pairs, 714 based on Foata normal form. 5/6139 useless extension candidates. Maximal degree in co-relation 44833. Up to 5289 conditions per place. [2024-06-03 18:55:15,147 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 459 selfloop transitions, 143 changer transitions 0/609 dead transitions. [2024-06-03 18:55:15,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 609 transitions, 9408 flow [2024-06-03 18:55:15,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:55:15,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:55:15,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 18:55:15,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-03 18:55:15,148 INFO L175 Difference]: Start difference. First operand has 441 places, 589 transitions, 7914 flow. Second operand 6 states and 150 transitions. [2024-06-03 18:55:15,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 609 transitions, 9408 flow [2024-06-03 18:55:19,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 609 transitions, 9227 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:55:19,817 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 8030 flow [2024-06-03 18:55:19,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7733, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8030, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-03 18:55:19,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-03 18:55:19,818 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 8030 flow [2024-06-03 18:55:19,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:19,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:19,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:55:19,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 18:55:19,819 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)] === [2024-06-03 18:55:19,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:19,819 INFO L85 PathProgramCache]: Analyzing trace with hash 482905666, now seen corresponding path program 23 times [2024-06-03 18:55:19,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:19,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794364386] [2024-06-03 18:55:19,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:19,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:19,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:19,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:19,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:19,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794364386] [2024-06-03 18:55:19,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794364386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:19,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:19,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:55:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570145442] [2024-06-03 18:55:19,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:19,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:55:19,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:55:19,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:55:19,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:19,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 8030 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:19,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:19,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:19,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:21,512 INFO L124 PetriNetUnfolderBase]: 3627/6154 cut-off events. [2024-06-03 18:55:21,512 INFO L125 PetriNetUnfolderBase]: For 812524/812530 co-relation queries the response was YES. [2024-06-03 18:55:21,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45193 conditions, 6154 events. 3627/6154 cut-off events. For 812524/812530 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42722 event pairs, 683 based on Foata normal form. 5/6153 useless extension candidates. Maximal degree in co-relation 44988. Up to 5286 conditions per place. [2024-06-03 18:55:21,601 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 458 selfloop transitions, 156 changer transitions 0/621 dead transitions. [2024-06-03 18:55:21,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 621 transitions, 9822 flow [2024-06-03 18:55:21,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:55:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:55:21,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-03 18:55:21,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-03 18:55:21,602 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 8030 flow. Second operand 8 states and 202 transitions. [2024-06-03 18:55:21,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 621 transitions, 9822 flow [2024-06-03 18:55:26,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 621 transitions, 9441 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 18:55:26,466 INFO L231 Difference]: Finished difference. Result has 440 places, 589 transitions, 7980 flow [2024-06-03 18:55:26,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7980, PETRI_PLACES=440, PETRI_TRANSITIONS=589} [2024-06-03 18:55:26,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-03 18:55:26,467 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 589 transitions, 7980 flow [2024-06-03 18:55:26,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:26,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:26,467 INFO 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] [2024-06-03 18:55:26,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 18:55:26,467 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)] === [2024-06-03 18:55:26,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 56670884, now seen corresponding path program 13 times [2024-06-03 18:55:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408002003] [2024-06-03 18:55:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:26,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:26,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:26,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408002003] [2024-06-03 18:55:26,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408002003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:26,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:26,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:55:26,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655662944] [2024-06-03 18:55:26,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:26,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:55:26,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:26,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:55:26,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:55:26,620 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:26,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 589 transitions, 7980 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:26,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:26,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:26,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:28,072 INFO L124 PetriNetUnfolderBase]: 3632/6142 cut-off events. [2024-06-03 18:55:28,072 INFO L125 PetriNetUnfolderBase]: For 810896/810896 co-relation queries the response was YES. [2024-06-03 18:55:28,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45229 conditions, 6142 events. 3632/6142 cut-off events. For 810896/810896 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42621 event pairs, 707 based on Foata normal form. 1/6131 useless extension candidates. Maximal degree in co-relation 45024. Up to 5310 conditions per place. [2024-06-03 18:55:28,160 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 164 changer transitions 0/609 dead transitions. [2024-06-03 18:55:28,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 609 transitions, 9755 flow [2024-06-03 18:55:28,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:55:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:55:28,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 18:55:28,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505952380952381 [2024-06-03 18:55:28,161 INFO L175 Difference]: Start difference. First operand has 440 places, 589 transitions, 7980 flow. Second operand 8 states and 185 transitions. [2024-06-03 18:55:28,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 609 transitions, 9755 flow [2024-06-03 18:55:32,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 609 transitions, 9382 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 18:55:32,511 INFO L231 Difference]: Finished difference. Result has 438 places, 592 transitions, 7996 flow [2024-06-03 18:55:32,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7615, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7996, PETRI_PLACES=438, PETRI_TRANSITIONS=592} [2024-06-03 18:55:32,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-03 18:55:32,511 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 592 transitions, 7996 flow [2024-06-03 18:55:32,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:32,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:32,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:55:32,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 18:55:32,512 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)] === [2024-06-03 18:55:32,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:32,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1422778648, now seen corresponding path program 24 times [2024-06-03 18:55:32,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:32,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667838] [2024-06-03 18:55:32,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:32,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:32,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:32,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:32,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667838] [2024-06-03 18:55:32,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:32,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:32,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:55:32,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523110660] [2024-06-03 18:55:32,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:32,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:55:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:32,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:55:32,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:55:32,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:32,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 592 transitions, 7996 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:32,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:32,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:32,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:34,114 INFO L124 PetriNetUnfolderBase]: 3629/6159 cut-off events. [2024-06-03 18:55:34,114 INFO L125 PetriNetUnfolderBase]: For 792645/792651 co-relation queries the response was YES. [2024-06-03 18:55:34,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44960 conditions, 6159 events. 3629/6159 cut-off events. For 792645/792651 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42796 event pairs, 681 based on Foata normal form. 5/6158 useless extension candidates. Maximal degree in co-relation 44756. Up to 5290 conditions per place. [2024-06-03 18:55:34,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 460 selfloop transitions, 163 changer transitions 0/630 dead transitions. [2024-06-03 18:55:34,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 630 transitions, 9578 flow [2024-06-03 18:55:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:55:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:55:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-03 18:55:34,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-03 18:55:34,205 INFO L175 Difference]: Start difference. First operand has 438 places, 592 transitions, 7996 flow. Second operand 9 states and 224 transitions. [2024-06-03 18:55:34,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 630 transitions, 9578 flow [2024-06-03 18:55:39,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 630 transitions, 9385 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 18:55:39,126 INFO L231 Difference]: Finished difference. Result has 443 places, 592 transitions, 8147 flow [2024-06-03 18:55:39,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7803, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8147, PETRI_PLACES=443, PETRI_TRANSITIONS=592} [2024-06-03 18:55:39,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-03 18:55:39,126 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 592 transitions, 8147 flow [2024-06-03 18:55:39,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:39,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:39,126 INFO 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] [2024-06-03 18:55:39,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 18:55:39,127 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)] === [2024-06-03 18:55:39,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:39,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1726855132, now seen corresponding path program 14 times [2024-06-03 18:55:39,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:39,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539027655] [2024-06-03 18:55:39,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:39,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:39,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539027655] [2024-06-03 18:55:39,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539027655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:39,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:39,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:55:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665645458] [2024-06-03 18:55:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:39,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:55:39,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:39,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:55:39,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:55:39,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:39,289 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 592 transitions, 8147 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:39,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:39,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:39,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:40,772 INFO L124 PetriNetUnfolderBase]: 3626/6155 cut-off events. [2024-06-03 18:55:40,772 INFO L125 PetriNetUnfolderBase]: For 799926/799932 co-relation queries the response was YES. [2024-06-03 18:55:40,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45022 conditions, 6155 events. 3626/6155 cut-off events. For 799926/799932 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 42755 event pairs, 699 based on Foata normal form. 5/6154 useless extension candidates. Maximal degree in co-relation 44816. Up to 5303 conditions per place. [2024-06-03 18:55:40,858 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 441 selfloop transitions, 164 changer transitions 0/612 dead transitions. [2024-06-03 18:55:40,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 612 transitions, 10131 flow [2024-06-03 18:55:40,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:55:40,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:55:40,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 18:55:40,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 18:55:40,859 INFO L175 Difference]: Start difference. First operand has 443 places, 592 transitions, 8147 flow. Second operand 7 states and 170 transitions. [2024-06-03 18:55:40,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 612 transitions, 10131 flow [2024-06-03 18:55:45,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 612 transitions, 9769 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-03 18:55:45,609 INFO L231 Difference]: Finished difference. Result has 439 places, 592 transitions, 8141 flow [2024-06-03 18:55:45,609 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7803, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8141, PETRI_PLACES=439, PETRI_TRANSITIONS=592} [2024-06-03 18:55:45,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 18:55:45,609 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 592 transitions, 8141 flow [2024-06-03 18:55:45,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:45,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:45,609 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, 1] [2024-06-03 18:55:45,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 18:55:45,609 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)] === [2024-06-03 18:55:45,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:45,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1977746284, now seen corresponding path program 15 times [2024-06-03 18:55:45,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:45,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127867826] [2024-06-03 18:55:45,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:45,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:45,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:45,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:45,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127867826] [2024-06-03 18:55:45,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127867826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:45,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:45,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:55:45,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797193840] [2024-06-03 18:55:45,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:45,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:55:45,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:45,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:55:45,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:55:45,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:45,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 592 transitions, 8141 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:45,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:45,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:45,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:47,176 INFO L124 PetriNetUnfolderBase]: 3631/6162 cut-off events. [2024-06-03 18:55:47,176 INFO L125 PetriNetUnfolderBase]: For 775950/775956 co-relation queries the response was YES. [2024-06-03 18:55:47,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44832 conditions, 6162 events. 3631/6162 cut-off events. For 775950/775956 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42816 event pairs, 706 based on Foata normal form. 5/6161 useless extension candidates. Maximal degree in co-relation 44628. Up to 5309 conditions per place. [2024-06-03 18:55:47,267 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 167 changer transitions 0/614 dead transitions. [2024-06-03 18:55:47,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 614 transitions, 9936 flow [2024-06-03 18:55:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:55:47,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:55:47,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 18:55:47,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5748299319727891 [2024-06-03 18:55:47,268 INFO L175 Difference]: Start difference. First operand has 439 places, 592 transitions, 8141 flow. Second operand 7 states and 169 transitions. [2024-06-03 18:55:47,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 614 transitions, 9936 flow [2024-06-03 18:55:51,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 614 transitions, 9436 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 18:55:51,547 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 8048 flow [2024-06-03 18:55:51,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8048, PETRI_PLACES=439, PETRI_TRANSITIONS=595} [2024-06-03 18:55:51,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 18:55:51,547 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 8048 flow [2024-06-03 18:55:51,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:51,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:51,547 INFO 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] [2024-06-03 18:55:51,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 18:55:51,548 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)] === [2024-06-03 18:55:51,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 27061186, now seen corresponding path program 16 times [2024-06-03 18:55:51,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:51,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764386689] [2024-06-03 18:55:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:51,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:51,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:51,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764386689] [2024-06-03 18:55:51,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764386689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:51,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:51,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:55:51,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625205953] [2024-06-03 18:55:51,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:51,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:55:51,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:51,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:55:51,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:55:51,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:51,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 595 transitions, 8048 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:51,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:51,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:51,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:53,143 INFO L124 PetriNetUnfolderBase]: 3628/6155 cut-off events. [2024-06-03 18:55:53,143 INFO L125 PetriNetUnfolderBase]: For 762671/762671 co-relation queries the response was YES. [2024-06-03 18:55:53,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44479 conditions, 6155 events. 3628/6155 cut-off events. For 762671/762671 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42691 event pairs, 654 based on Foata normal form. 1/6153 useless extension candidates. Maximal degree in co-relation 44276. Up to 5433 conditions per place. [2024-06-03 18:55:53,232 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 89 changer transitions 0/618 dead transitions. [2024-06-03 18:55:53,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 618 transitions, 9566 flow [2024-06-03 18:55:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:55:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:55:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 18:55:53,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-03 18:55:53,233 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 8048 flow. Second operand 6 states and 156 transitions. [2024-06-03 18:55:53,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 618 transitions, 9566 flow [2024-06-03 18:55:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 618 transitions, 9325 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 18:55:57,598 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 8008 flow [2024-06-03 18:55:57,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7809, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8008, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-03 18:55:57,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-03 18:55:57,598 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 8008 flow [2024-06-03 18:55:57,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:57,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:55:57,598 INFO 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] [2024-06-03 18:55:57,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 18:55:57,599 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)] === [2024-06-03 18:55:57,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:55:57,599 INFO L85 PathProgramCache]: Analyzing trace with hash 26883556, now seen corresponding path program 17 times [2024-06-03 18:55:57,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:55:57,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540289484] [2024-06-03 18:55:57,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:55:57,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:55:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:55:57,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:55:57,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:55:57,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540289484] [2024-06-03 18:55:57,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540289484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:55:57,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:55:57,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:55:57,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101799253] [2024-06-03 18:55:57,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:55:57,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:55:57,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:55:57,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:55:57,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:55:57,765 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:55:57,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 8008 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:55:57,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:55:57,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:55:57,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:55:59,176 INFO L124 PetriNetUnfolderBase]: 3625/6151 cut-off events. [2024-06-03 18:55:59,177 INFO L125 PetriNetUnfolderBase]: For 755822/755822 co-relation queries the response was YES. [2024-06-03 18:55:59,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44197 conditions, 6151 events. 3625/6151 cut-off events. For 755822/755822 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 42621 event pairs, 654 based on Foata normal form. 1/6149 useless extension candidates. Maximal degree in co-relation 43993. Up to 5430 conditions per place. [2024-06-03 18:55:59,263 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 528 selfloop transitions, 89 changer transitions 0/624 dead transitions. [2024-06-03 18:55:59,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 624 transitions, 9316 flow [2024-06-03 18:55:59,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:55:59,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:55:59,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 18:55:59,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-03 18:55:59,264 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 8008 flow. Second operand 7 states and 181 transitions. [2024-06-03 18:55:59,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 624 transitions, 9316 flow [2024-06-03 18:56:04,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 624 transitions, 9007 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:04,058 INFO L231 Difference]: Finished difference. Result has 441 places, 595 transitions, 7901 flow [2024-06-03 18:56:04,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7699, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7901, PETRI_PLACES=441, PETRI_TRANSITIONS=595} [2024-06-03 18:56:04,059 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 18:56:04,059 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 595 transitions, 7901 flow [2024-06-03 18:56:04,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:04,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:04,060 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] [2024-06-03 18:56:04,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 18:56:04,060 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)] === [2024-06-03 18:56:04,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:04,060 INFO L85 PathProgramCache]: Analyzing trace with hash 567125032, now seen corresponding path program 18 times [2024-06-03 18:56:04,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:04,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625021076] [2024-06-03 18:56:04,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:04,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:04,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:04,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625021076] [2024-06-03 18:56:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625021076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:04,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:04,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211921839] [2024-06-03 18:56:04,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:04,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:04,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 595 transitions, 7901 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:04,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:04,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:04,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:05,770 INFO L124 PetriNetUnfolderBase]: 3622/6149 cut-off events. [2024-06-03 18:56:05,771 INFO L125 PetriNetUnfolderBase]: For 751362/751368 co-relation queries the response was YES. [2024-06-03 18:56:05,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44026 conditions, 6149 events. 3622/6149 cut-off events. For 751362/751368 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42713 event pairs, 690 based on Foata normal form. 5/6149 useless extension candidates. Maximal degree in co-relation 43821. Up to 5300 conditions per place. [2024-06-03 18:56:05,863 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 444 selfloop transitions, 172 changer transitions 0/623 dead transitions. [2024-06-03 18:56:05,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 623 transitions, 9679 flow [2024-06-03 18:56:05,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:05,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:05,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 18:56:05,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 18:56:05,865 INFO L175 Difference]: Start difference. First operand has 441 places, 595 transitions, 7901 flow. Second operand 7 states and 179 transitions. [2024-06-03 18:56:05,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 623 transitions, 9679 flow [2024-06-03 18:56:10,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 623 transitions, 9471 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:10,542 INFO L231 Difference]: Finished difference. Result has 442 places, 595 transitions, 8059 flow [2024-06-03 18:56:10,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7697, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8059, PETRI_PLACES=442, PETRI_TRANSITIONS=595} [2024-06-03 18:56:10,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-03 18:56:10,543 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 595 transitions, 8059 flow [2024-06-03 18:56:10,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:10,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:10,543 INFO 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] [2024-06-03 18:56:10,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 18:56:10,543 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)] === [2024-06-03 18:56:10,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:10,544 INFO L85 PathProgramCache]: Analyzing trace with hash -168853478, now seen corresponding path program 19 times [2024-06-03 18:56:10,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:10,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716396170] [2024-06-03 18:56:10,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:10,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:10,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:10,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:10,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716396170] [2024-06-03 18:56:10,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716396170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:10,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:10,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:10,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403577987] [2024-06-03 18:56:10,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:10,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:10,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:10,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:10,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:10,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:10,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 595 transitions, 8059 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:10,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:10,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:10,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:12,072 INFO L124 PetriNetUnfolderBase]: 3619/6125 cut-off events. [2024-06-03 18:56:12,072 INFO L125 PetriNetUnfolderBase]: For 745629/745629 co-relation queries the response was YES. [2024-06-03 18:56:12,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44035 conditions, 6125 events. 3619/6125 cut-off events. For 745629/745629 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42463 event pairs, 705 based on Foata normal form. 1/6114 useless extension candidates. Maximal degree in co-relation 43830. Up to 5297 conditions per place. [2024-06-03 18:56:12,158 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 432 selfloop transitions, 171 changer transitions 0/610 dead transitions. [2024-06-03 18:56:12,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 610 transitions, 9539 flow [2024-06-03 18:56:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 18:56:12,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5578231292517006 [2024-06-03 18:56:12,160 INFO L175 Difference]: Start difference. First operand has 442 places, 595 transitions, 8059 flow. Second operand 7 states and 164 transitions. [2024-06-03 18:56:12,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 610 transitions, 9539 flow [2024-06-03 18:56:16,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 610 transitions, 9159 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-03 18:56:16,703 INFO L231 Difference]: Finished difference. Result has 440 places, 595 transitions, 8037 flow [2024-06-03 18:56:16,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7685, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8037, PETRI_PLACES=440, PETRI_TRANSITIONS=595} [2024-06-03 18:56:16,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-03 18:56:16,703 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 595 transitions, 8037 flow [2024-06-03 18:56:16,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:16,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:16,704 INFO 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] [2024-06-03 18:56:16,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 18:56:16,704 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)] === [2024-06-03 18:56:16,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:16,704 INFO L85 PathProgramCache]: Analyzing trace with hash 567124846, now seen corresponding path program 25 times [2024-06-03 18:56:16,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:16,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515861170] [2024-06-03 18:56:16,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:16,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:16,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:16,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515861170] [2024-06-03 18:56:16,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515861170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:16,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:16,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:16,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319780393] [2024-06-03 18:56:16,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:16,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:16,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:16,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:16,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:16,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:16,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 595 transitions, 8037 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:16,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:16,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:16,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:18,373 INFO L124 PetriNetUnfolderBase]: 3616/6141 cut-off events. [2024-06-03 18:56:18,373 INFO L125 PetriNetUnfolderBase]: For 714150/714156 co-relation queries the response was YES. [2024-06-03 18:56:18,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43668 conditions, 6141 events. 3616/6141 cut-off events. For 714150/714156 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 42627 event pairs, 673 based on Foata normal form. 5/6141 useless extension candidates. Maximal degree in co-relation 43465. Up to 5274 conditions per place. [2024-06-03 18:56:18,460 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 163 changer transitions 0/636 dead transitions. [2024-06-03 18:56:18,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 636 transitions, 9399 flow [2024-06-03 18:56:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:56:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:56:18,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-03 18:56:18,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-03 18:56:18,461 INFO L175 Difference]: Start difference. First operand has 440 places, 595 transitions, 8037 flow. Second operand 10 states and 245 transitions. [2024-06-03 18:56:18,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 636 transitions, 9399 flow [2024-06-03 18:56:22,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 636 transitions, 8948 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 18:56:22,993 INFO L231 Difference]: Finished difference. Result has 442 places, 595 transitions, 7934 flow [2024-06-03 18:56:22,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7586, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7934, PETRI_PLACES=442, PETRI_TRANSITIONS=595} [2024-06-03 18:56:22,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-03 18:56:22,993 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 595 transitions, 7934 flow [2024-06-03 18:56:22,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:22,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:22,993 INFO 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] [2024-06-03 18:56:22,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 18:56:22,993 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)] === [2024-06-03 18:56:22,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:22,994 INFO L85 PathProgramCache]: Analyzing trace with hash 567131542, now seen corresponding path program 20 times [2024-06-03 18:56:22,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:22,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118120072] [2024-06-03 18:56:22,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:22,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:23,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:23,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118120072] [2024-06-03 18:56:23,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118120072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:23,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:23,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:23,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984819947] [2024-06-03 18:56:23,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:23,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:23,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:23,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:23,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:23,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:23,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 595 transitions, 7934 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:23,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:23,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:23,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:24,660 INFO L124 PetriNetUnfolderBase]: 3613/6138 cut-off events. [2024-06-03 18:56:24,660 INFO L125 PetriNetUnfolderBase]: For 708087/708093 co-relation queries the response was YES. [2024-06-03 18:56:24,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43518 conditions, 6138 events. 3613/6138 cut-off events. For 708087/708093 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 42657 event pairs, 705 based on Foata normal form. 5/6137 useless extension candidates. Maximal degree in co-relation 43315. Up to 5290 conditions per place. [2024-06-03 18:56:24,745 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 171 changer transitions 0/618 dead transitions. [2024-06-03 18:56:24,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 618 transitions, 9214 flow [2024-06-03 18:56:24,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 18:56:24,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-03 18:56:24,746 INFO L175 Difference]: Start difference. First operand has 442 places, 595 transitions, 7934 flow. Second operand 7 states and 173 transitions. [2024-06-03 18:56:24,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 618 transitions, 9214 flow [2024-06-03 18:56:28,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 618 transitions, 8870 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 18:56:28,847 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 7946 flow [2024-06-03 18:56:28,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7590, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7946, PETRI_PLACES=439, PETRI_TRANSITIONS=595} [2024-06-03 18:56:28,847 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-03 18:56:28,847 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 7946 flow [2024-06-03 18:56:28,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:28,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:28,847 INFO 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] [2024-06-03 18:56:28,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 18:56:28,847 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)] === [2024-06-03 18:56:28,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:28,848 INFO L85 PathProgramCache]: Analyzing trace with hash 22296610, now seen corresponding path program 7 times [2024-06-03 18:56:28,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:28,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027577181] [2024-06-03 18:56:28,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:28,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:28,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:28,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:28,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027577181] [2024-06-03 18:56:28,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027577181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:28,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:28,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:28,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34136829] [2024-06-03 18:56:28,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:28,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:28,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:28,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:28,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:29,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:29,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 595 transitions, 7946 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:29,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:29,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:29,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:30,545 INFO L124 PetriNetUnfolderBase]: 3669/6227 cut-off events. [2024-06-03 18:56:30,545 INFO L125 PetriNetUnfolderBase]: For 771377/771377 co-relation queries the response was YES. [2024-06-03 18:56:30,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43925 conditions, 6227 events. 3669/6227 cut-off events. For 771377/771377 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 43218 event pairs, 536 based on Foata normal form. 16/6240 useless extension candidates. Maximal degree in co-relation 43722. Up to 5338 conditions per place. [2024-06-03 18:56:30,630 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 518 selfloop transitions, 105 changer transitions 0/630 dead transitions. [2024-06-03 18:56:30,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 630 transitions, 9352 flow [2024-06-03 18:56:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:30,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:30,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 18:56:30,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-03 18:56:30,630 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 7946 flow. Second operand 7 states and 184 transitions. [2024-06-03 18:56:30,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 630 transitions, 9352 flow [2024-06-03 18:56:34,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 630 transitions, 8835 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:56:34,642 INFO L231 Difference]: Finished difference. Result has 436 places, 597 transitions, 7729 flow [2024-06-03 18:56:34,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7729, PETRI_PLACES=436, PETRI_TRANSITIONS=597} [2024-06-03 18:56:34,642 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 18:56:34,642 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 597 transitions, 7729 flow [2024-06-03 18:56:34,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:34,642 INFO 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] [2024-06-03 18:56:34,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 18:56:34,643 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)] === [2024-06-03 18:56:34,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 938257156, now seen corresponding path program 8 times [2024-06-03 18:56:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:34,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745381998] [2024-06-03 18:56:34,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:34,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:34,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745381998] [2024-06-03 18:56:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745381998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:34,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:34,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:34,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336363420] [2024-06-03 18:56:34,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:34,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:34,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:34,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:34,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:34,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:34,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 597 transitions, 7729 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:34,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:34,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:34,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:36,135 INFO L124 PetriNetUnfolderBase]: 3725/6314 cut-off events. [2024-06-03 18:56:36,135 INFO L125 PetriNetUnfolderBase]: For 766182/766188 co-relation queries the response was YES. [2024-06-03 18:56:36,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44577 conditions, 6314 events. 3725/6314 cut-off events. For 766182/766188 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43976 event pairs, 724 based on Foata normal form. 20/6328 useless extension candidates. Maximal degree in co-relation 44376. Up to 5338 conditions per place. [2024-06-03 18:56:36,475 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 442 selfloop transitions, 171 changer transitions 0/620 dead transitions. [2024-06-03 18:56:36,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 620 transitions, 9087 flow [2024-06-03 18:56:36,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:36,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:36,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 18:56:36,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-03 18:56:36,477 INFO L175 Difference]: Start difference. First operand has 436 places, 597 transitions, 7729 flow. Second operand 7 states and 170 transitions. [2024-06-03 18:56:36,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 620 transitions, 9087 flow [2024-06-03 18:56:40,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 620 transitions, 8867 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:40,353 INFO L231 Difference]: Finished difference. Result has 438 places, 599 transitions, 7931 flow [2024-06-03 18:56:40,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7931, PETRI_PLACES=438, PETRI_TRANSITIONS=599} [2024-06-03 18:56:40,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-03 18:56:40,353 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 599 transitions, 7931 flow [2024-06-03 18:56:40,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:40,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:40,353 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, 1] [2024-06-03 18:56:40,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 18:56:40,354 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)] === [2024-06-03 18:56:40,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash 567359206, now seen corresponding path program 9 times [2024-06-03 18:56:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:40,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638675969] [2024-06-03 18:56:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:40,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:40,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:40,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638675969] [2024-06-03 18:56:40,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638675969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:40,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:40,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384414773] [2024-06-03 18:56:40,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:40,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:40,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:40,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:40,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 599 transitions, 7931 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:40,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:40,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:40,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:42,052 INFO L124 PetriNetUnfolderBase]: 3768/6387 cut-off events. [2024-06-03 18:56:42,052 INFO L125 PetriNetUnfolderBase]: For 767372/767378 co-relation queries the response was YES. [2024-06-03 18:56:42,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45058 conditions, 6387 events. 3768/6387 cut-off events. For 767372/767378 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44545 event pairs, 733 based on Foata normal form. 20/6401 useless extension candidates. Maximal degree in co-relation 44856. Up to 5343 conditions per place. [2024-06-03 18:56:42,144 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 444 selfloop transitions, 177 changer transitions 0/628 dead transitions. [2024-06-03 18:56:42,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 628 transitions, 9325 flow [2024-06-03 18:56:42,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 18:56:42,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 18:56:42,145 INFO L175 Difference]: Start difference. First operand has 438 places, 599 transitions, 7931 flow. Second operand 7 states and 176 transitions. [2024-06-03 18:56:42,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 628 transitions, 9325 flow [2024-06-03 18:56:45,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 628 transitions, 8939 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 18:56:45,982 INFO L231 Difference]: Finished difference. Result has 440 places, 601 transitions, 7987 flow [2024-06-03 18:56:45,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7549, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7987, PETRI_PLACES=440, PETRI_TRANSITIONS=601} [2024-06-03 18:56:45,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 397 predicate places. [2024-06-03 18:56:45,982 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 601 transitions, 7987 flow [2024-06-03 18:56:45,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:45,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:45,982 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] [2024-06-03 18:56:45,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 18:56:45,982 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)] === [2024-06-03 18:56:45,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:45,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1350866176, now seen corresponding path program 10 times [2024-06-03 18:56:45,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:45,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896665972] [2024-06-03 18:56:45,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:45,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:46,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:46,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896665972] [2024-06-03 18:56:46,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1896665972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:46,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:46,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:46,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817904064] [2024-06-03 18:56:46,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:46,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:46,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:46,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:46,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:46,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:46,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 601 transitions, 7987 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:46,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:46,140 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:46,140 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:47,693 INFO L124 PetriNetUnfolderBase]: 3775/6404 cut-off events. [2024-06-03 18:56:47,693 INFO L125 PetriNetUnfolderBase]: For 699801/699807 co-relation queries the response was YES. [2024-06-03 18:56:47,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44300 conditions, 6404 events. 3775/6404 cut-off events. For 699801/699807 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 44684 event pairs, 602 based on Foata normal form. 16/6414 useless extension candidates. Maximal degree in co-relation 44097. Up to 4818 conditions per place. [2024-06-03 18:56:47,785 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 426 selfloop transitions, 203 changer transitions 0/636 dead transitions. [2024-06-03 18:56:47,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 636 transitions, 9613 flow [2024-06-03 18:56:47,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:47,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:47,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-03 18:56:47,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-03 18:56:47,786 INFO L175 Difference]: Start difference. First operand has 440 places, 601 transitions, 7987 flow. Second operand 7 states and 183 transitions. [2024-06-03 18:56:47,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 636 transitions, 9613 flow [2024-06-03 18:56:51,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 636 transitions, 9215 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:51,927 INFO L231 Difference]: Finished difference. Result has 441 places, 602 transitions, 8047 flow [2024-06-03 18:56:51,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7595, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8047, PETRI_PLACES=441, PETRI_TRANSITIONS=602} [2024-06-03 18:56:51,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 18:56:51,928 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 602 transitions, 8047 flow [2024-06-03 18:56:51,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:51,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:51,928 INFO 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] [2024-06-03 18:56:51,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 18:56:51,928 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)] === [2024-06-03 18:56:51,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:51,928 INFO L85 PathProgramCache]: Analyzing trace with hash 874776472, now seen corresponding path program 2 times [2024-06-03 18:56:51,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:51,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811766684] [2024-06-03 18:56:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:51,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:52,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811766684] [2024-06-03 18:56:52,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811766684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:52,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:52,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:52,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545810371] [2024-06-03 18:56:52,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:52,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:52,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:52,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:52,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:52,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:52,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 602 transitions, 8047 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:52,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:52,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:52,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:53,691 INFO L124 PetriNetUnfolderBase]: 3815/6471 cut-off events. [2024-06-03 18:56:53,691 INFO L125 PetriNetUnfolderBase]: For 686899/686899 co-relation queries the response was YES. [2024-06-03 18:56:53,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44724 conditions, 6471 events. 3815/6471 cut-off events. For 686899/686899 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 45202 event pairs, 544 based on Foata normal form. 12/6480 useless extension candidates. Maximal degree in co-relation 44521. Up to 5512 conditions per place. [2024-06-03 18:56:53,777 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 522 selfloop transitions, 105 changer transitions 0/634 dead transitions. [2024-06-03 18:56:53,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 634 transitions, 9455 flow [2024-06-03 18:56:53,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:53,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:53,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 18:56:53,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-03 18:56:53,778 INFO L175 Difference]: Start difference. First operand has 441 places, 602 transitions, 8047 flow. Second operand 7 states and 179 transitions. [2024-06-03 18:56:53,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 634 transitions, 9455 flow [2024-06-03 18:56:57,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 634 transitions, 9058 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 18:56:57,958 INFO L231 Difference]: Finished difference. Result has 442 places, 604 transitions, 7927 flow [2024-06-03 18:56:57,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7650, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7927, PETRI_PLACES=442, PETRI_TRANSITIONS=604} [2024-06-03 18:56:57,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-03 18:56:57,958 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 604 transitions, 7927 flow [2024-06-03 18:56:57,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:57,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:56:57,959 INFO 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] [2024-06-03 18:56:57,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 18:56:57,959 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)] === [2024-06-03 18:56:57,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:56:57,959 INFO L85 PathProgramCache]: Analyzing trace with hash 1793611426, now seen corresponding path program 3 times [2024-06-03 18:56:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:56:57,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254920204] [2024-06-03 18:56:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:56:57,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:56:57,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:56:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:56:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:56:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254920204] [2024-06-03 18:56:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254920204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:56:58,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:56:58,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:56:58,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155056520] [2024-06-03 18:56:58,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:56:58,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:56:58,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:56:58,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:56:58,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:56:58,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:56:58,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 604 transitions, 7927 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:56:58,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:56:58,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:56:58,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:56:59,639 INFO L124 PetriNetUnfolderBase]: 3901/6619 cut-off events. [2024-06-03 18:56:59,639 INFO L125 PetriNetUnfolderBase]: For 729069/729069 co-relation queries the response was YES. [2024-06-03 18:56:59,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46079 conditions, 6619 events. 3901/6619 cut-off events. For 729069/729069 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 46429 event pairs, 514 based on Foata normal form. 12/6628 useless extension candidates. Maximal degree in co-relation 45877. Up to 5325 conditions per place. [2024-06-03 18:56:59,738 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 526 selfloop transitions, 103 changer transitions 0/636 dead transitions. [2024-06-03 18:56:59,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 636 transitions, 9597 flow [2024-06-03 18:56:59,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:56:59,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:56:59,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 18:56:59,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-03 18:56:59,739 INFO L175 Difference]: Start difference. First operand has 442 places, 604 transitions, 7927 flow. Second operand 7 states and 176 transitions. [2024-06-03 18:56:59,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 636 transitions, 9597 flow [2024-06-03 18:57:03,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 636 transitions, 9342 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 18:57:03,953 INFO L231 Difference]: Finished difference. Result has 444 places, 607 transitions, 7983 flow [2024-06-03 18:57:03,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7672, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=502, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7983, PETRI_PLACES=444, PETRI_TRANSITIONS=607} [2024-06-03 18:57:03,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-03 18:57:03,953 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 607 transitions, 7983 flow [2024-06-03 18:57:03,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:57:03,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:57:03,953 INFO 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] [2024-06-03 18:57:03,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 18:57:03,953 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)] === [2024-06-03 18:57:03,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:57:03,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1735434940, now seen corresponding path program 4 times [2024-06-03 18:57:03,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:57:03,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791520381] [2024-06-03 18:57:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:57:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:57:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:57:04,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:57:04,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:57:04,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791520381] [2024-06-03 18:57:04,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791520381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:57:04,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:57:04,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:57:04,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518442788] [2024-06-03 18:57:04,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:57:04,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:57:04,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:57:04,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:57:04,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:57:04,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:57:04,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 607 transitions, 7983 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:57:04,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:57:04,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:57:04,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:57:05,654 INFO L124 PetriNetUnfolderBase]: 3908/6635 cut-off events. [2024-06-03 18:57:05,654 INFO L125 PetriNetUnfolderBase]: For 705321/705327 co-relation queries the response was YES. [2024-06-03 18:57:05,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45491 conditions, 6635 events. 3908/6635 cut-off events. For 705321/705327 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 46588 event pairs, 751 based on Foata normal form. 16/6645 useless extension candidates. Maximal degree in co-relation 45288. Up to 5319 conditions per place. [2024-06-03 18:57:05,747 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 440 selfloop transitions, 185 changer transitions 0/632 dead transitions. [2024-06-03 18:57:05,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 632 transitions, 9349 flow [2024-06-03 18:57:05,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:57:05,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:57:05,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 18:57:05,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-03 18:57:05,748 INFO L175 Difference]: Start difference. First operand has 444 places, 607 transitions, 7983 flow. Second operand 7 states and 172 transitions. [2024-06-03 18:57:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 632 transitions, 9349 flow [2024-06-03 18:57:09,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 632 transitions, 9212 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-03 18:57:09,851 INFO L231 Difference]: Finished difference. Result has 448 places, 608 transitions, 8262 flow [2024-06-03 18:57:09,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7846, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8262, PETRI_PLACES=448, PETRI_TRANSITIONS=608} [2024-06-03 18:57:09,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-03 18:57:09,852 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 608 transitions, 8262 flow [2024-06-03 18:57:09,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:57:09,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:57:09,852 INFO 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] [2024-06-03 18:57:09,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 18:57:09,852 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)] === [2024-06-03 18:57:09,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:57:09,853 INFO L85 PathProgramCache]: Analyzing trace with hash -2064802542, now seen corresponding path program 1 times [2024-06-03 18:57:09,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:57:09,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072800113] [2024-06-03 18:57:09,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:57:09,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:57:09,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:57:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:57:09,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:57:09,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072800113] [2024-06-03 18:57:09,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072800113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:57:09,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:57:09,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:57:09,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348286492] [2024-06-03 18:57:09,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:57:09,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:57:09,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:57:09,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:57:09,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:57:10,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-03 18:57:10,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 608 transitions, 8262 flow. Second operand has 7 states, 7 states have (on average 16.428571428571427) internal successors, (115), 7 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:57:10,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:57:10,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-03 18:57:10,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:57:11,645 INFO L124 PetriNetUnfolderBase]: 3942/6681 cut-off events. [2024-06-03 18:57:11,646 INFO L125 PetriNetUnfolderBase]: For 678478/678484 co-relation queries the response was YES. [2024-06-03 18:57:11,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46943 conditions, 6681 events. 3942/6681 cut-off events. For 678478/678484 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 46844 event pairs, 739 based on Foata normal form. 2/6676 useless extension candidates. Maximal degree in co-relation 46738. Up to 5916 conditions per place. [2024-06-03 18:57:11,737 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 551 selfloop transitions, 82 changer transitions 0/640 dead transitions. [2024-06-03 18:57:11,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 640 transitions, 9988 flow [2024-06-03 18:57:11,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:57:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:57:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:57:11,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5816326530612245 [2024-06-03 18:57:11,738 INFO L175 Difference]: Start difference. First operand has 448 places, 608 transitions, 8262 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:57:11,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 640 transitions, 9988 flow