./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe032_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/safe032_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe032_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-7724a2d-m [2024-06-27 19:32:44,023 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:32:44,102 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:32:44,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:32:44,108 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:32:44,135 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:32:44,135 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:32:44,136 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:32:44,136 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:32:44,136 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:32:44,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:32:44,137 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:32:44,138 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:32:44,138 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:32:44,138 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:32:44,138 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:32:44,139 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:32:44,139 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:32:44,139 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:32:44,140 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:32:44,144 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:32:44,144 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:32:44,145 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:32:44,145 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:32:44,145 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:32:44,145 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:32:44,146 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:32:44,146 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:32:44,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:32:44,146 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:32:44,147 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:32:44,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:32:44,149 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:44,150 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:32:44,150 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:32:44,150 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:32:44,150 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:32:44,151 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:32:44,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:32:44,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:32:44,151 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:32:44,151 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:32:44,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:32:44,152 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:32:44,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:32:44,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:32:44,365 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:32:44,366 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:32:44,366 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:32:44,367 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe032_tso.yml/witness.yml [2024-06-27 19:32:44,450 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:32:44,451 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:32:44,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-27 19:32:45,374 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:32:45,564 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:32:45,565 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-27 19:32:45,578 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3653c5427/6e1cbcfaad404fba93e4f8c812199885/FLAG1692f07aa [2024-06-27 19:32:45,587 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3653c5427/6e1cbcfaad404fba93e4f8c812199885 [2024-06-27 19:32:45,589 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:32:45,590 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:32:45,590 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:45,591 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:32:45,594 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:32:45,595 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:44" (1/2) ... [2024-06-27 19:32:45,596 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c5d80f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:45, skipping insertion in model container [2024-06-27 19:32:45,597 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:44" (1/2) ... [2024-06-27 19:32:45,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@543d7f6d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:32:45, skipping insertion in model container [2024-06-27 19:32:45,598 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:45" (2/2) ... [2024-06-27 19:32:45,599 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77c5d80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:45, skipping insertion in model container [2024-06-27 19:32:45,599 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:32:45" (2/2) ... [2024-06-27 19:32:45,600 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:32:45,631 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:32:45,633 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:32:45,633 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:32:45,633 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-27 19:32:45,633 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:32:45,633 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-27 19:32:45,667 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:32:45,915 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:45,923 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:32:46,035 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:32:46,070 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:32:46,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46 WrapperNode [2024-06-27 19:32:46,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:32:46,072 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:46,072 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:32:46,072 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:32:46,078 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,130 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-27 19:32:46,131 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:32:46,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:32:46,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:32:46,132 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:32:46,139 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,139 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,151 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,167 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]. [2024-06-27 19:32:46,177 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,177 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,182 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,193 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:32:46,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:32:46,202 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:32:46,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:32:46,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (1/1) ... [2024-06-27 19:32:46,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:32:46,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:32:46,230 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) [2024-06-27 19:32:46,250 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 [2024-06-27 19:32:46,263 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:32:46,263 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:32:46,263 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:32:46,263 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:32:46,264 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:32:46,264 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:32:46,264 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:32:46,264 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:32:46,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:32:46,265 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:32:46,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:32:46,265 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:32:46,266 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:32:46,390 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:32:46,392 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:32:46,558 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:32:46,558 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:32:46,657 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:32:46,657 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:32:46,657 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:46 BoogieIcfgContainer [2024-06-27 19:32:46,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:32:46,659 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:32:46,659 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:32:46,661 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:32:46,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:32:44" (1/4) ... [2024-06-27 19:32:46,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99bcac and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:32:46, skipping insertion in model container [2024-06-27 19:32:46,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:32:45" (2/4) ... [2024-06-27 19:32:46,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99bcac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:46, skipping insertion in model container [2024-06-27 19:32:46,662 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:32:46" (3/4) ... [2024-06-27 19:32:46,662 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@99bcac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:32:46, skipping insertion in model container [2024-06-27 19:32:46,663 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:32:46" (4/4) ... [2024-06-27 19:32:46,663 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-27 19:32:46,676 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:32:46,676 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:32:46,676 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:32:46,710 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:32:46,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 19:32:46,774 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 19:32:46,775 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:46,776 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 4. Compared 72 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. [2024-06-27 19:32:46,776 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 19:32:46,780 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 19:32:46,798 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:32:46,805 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;@f69fb53, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:32:46,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:32:46,808 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:32:46,809 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 19:32:46,809 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:32:46,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:46,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:32:46,811 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)] === [2024-06-27 19:32:46,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash 219070604, now seen corresponding path program 1 times [2024-06-27 19:32:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:46,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216026149] [2024-06-27 19:32:46,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:46,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:47,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:47,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:47,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216026149] [2024-06-27 19:32:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216026149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:47,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:47,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:32:47,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953155433] [2024-06-27 19:32:47,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:47,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:32:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:47,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:32:47,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:32:47,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-27 19:32:47,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-27 19:32:47,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:47,356 INFO L124 PetriNetUnfolderBase]: 575/990 cut-off events. [2024-06-27 19:32:47,357 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-27 19:32:47,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 990 events. 575/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5172 event pairs, 361 based on Foata normal form. 1/922 useless extension candidates. Maximal degree in co-relation 1918. Up to 885 conditions per place. [2024-06-27 19:32:47,369 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 19:32:47,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 165 flow [2024-06-27 19:32:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:32:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:32:47,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-27 19:32:47,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7063492063492064 [2024-06-27 19:32:47,381 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 89 transitions. [2024-06-27 19:32:47,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 165 flow [2024-06-27 19:32:47,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:47,386 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 19:32:47,387 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} [2024-06-27 19:32:47,391 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 19:32:47,392 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 19:32:47,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,392 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:47,392 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:47,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:32:47,393 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)] === [2024-06-27 19:32:47,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:47,394 INFO L85 PathProgramCache]: Analyzing trace with hash 73488363, now seen corresponding path program 1 times [2024-06-27 19:32:47,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:47,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658450011] [2024-06-27 19:32:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:47,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:47,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:47,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:47,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658450011] [2024-06-27 19:32:47,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658450011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:47,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:47,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:47,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955493008] [2024-06-27 19:32:47,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:47,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:47,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:47,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-27 19:32:47,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-27 19:32:47,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:47,681 INFO L124 PetriNetUnfolderBase]: 569/966 cut-off events. [2024-06-27 19:32:47,681 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-27 19:32:47,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 966 events. 569/966 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4919 event pairs, 293 based on Foata normal form. 3/937 useless extension candidates. Maximal degree in co-relation 2189. Up to 861 conditions per place. [2024-06-27 19:32:47,687 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 35 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 19:32:47,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 232 flow [2024-06-27 19:32:47,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:47,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:47,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-27 19:32:47,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-27 19:32:47,690 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 117 transitions. [2024-06-27 19:32:47,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 232 flow [2024-06-27 19:32:47,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:47,693 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 19:32:47,693 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=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 19:32:47,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 19:32:47,694 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 19:32:47,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:47,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:47,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:32:47,697 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:47,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:47,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1951982098, now seen corresponding path program 1 times [2024-06-27 19:32:47,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:47,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111273336] [2024-06-27 19:32:47,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:47,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:47,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:47,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:47,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111273336] [2024-06-27 19:32:47,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111273336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:47,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:47,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:47,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139067916] [2024-06-27 19:32:47,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:47,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:47,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:47,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:47,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:47,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:47,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:47,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:47,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:47,967 INFO L124 PetriNetUnfolderBase]: 936/1529 cut-off events. [2024-06-27 19:32:47,967 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2024-06-27 19:32:47,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3853 conditions, 1529 events. 936/1529 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7770 event pairs, 533 based on Foata normal form. 3/1530 useless extension candidates. Maximal degree in co-relation 3839. Up to 1395 conditions per place. [2024-06-27 19:32:47,975 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-27 19:32:47,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 300 flow [2024-06-27 19:32:47,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-27 19:32:47,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-27 19:32:47,979 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 4 states and 111 transitions. [2024-06-27 19:32:47,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 300 flow [2024-06-27 19:32:47,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:47,982 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 202 flow [2024-06-27 19:32:47,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-06-27 19:32:47,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-27 19:32:47,984 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 202 flow [2024-06-27 19:32:47,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:47,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:47,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:47,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:32:47,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:47,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:47,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1501446107, now seen corresponding path program 1 times [2024-06-27 19:32:47,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:47,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851077559] [2024-06-27 19:32:47,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:47,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851077559] [2024-06-27 19:32:48,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851077559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:48,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018873402] [2024-06-27 19:32:48,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:48,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:48,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:48,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-27 19:32:48,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:48,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-27 19:32:48,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:48,321 INFO L124 PetriNetUnfolderBase]: 857/1493 cut-off events. [2024-06-27 19:32:48,321 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2024-06-27 19:32:48,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 1493 events. 857/1493 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7940 event pairs, 254 based on Foata normal form. 6/1463 useless extension candidates. Maximal degree in co-relation 4101. Up to 1227 conditions per place. [2024-06-27 19:32:48,329 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-27 19:32:48,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 418 flow [2024-06-27 19:32:48,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-27 19:32:48,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-27 19:32:48,331 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 202 flow. Second operand 6 states and 164 transitions. [2024-06-27 19:32:48,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 418 flow [2024-06-27 19:32:48,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 412 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:48,334 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-27 19:32:48,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-27 19:32:48,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-27 19:32:48,335 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-27 19:32:48,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:48,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:48,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:32:48,335 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:48,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash 408460797, now seen corresponding path program 1 times [2024-06-27 19:32:48,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:48,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972090157] [2024-06-27 19:32:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972090157] [2024-06-27 19:32:48,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972090157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:48,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319153322] [2024-06-27 19:32:48,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:48,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:48,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:48,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:48,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:48,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:48,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:48,581 INFO L124 PetriNetUnfolderBase]: 968/1626 cut-off events. [2024-06-27 19:32:48,581 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2024-06-27 19:32:48,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 1626 events. 968/1626 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8546 event pairs, 346 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 4991. Up to 1333 conditions per place. [2024-06-27 19:32:48,591 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 22 changer transitions 0/88 dead transitions. [2024-06-27 19:32:48,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 575 flow [2024-06-27 19:32:48,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:48,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-27 19:32:48,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-27 19:32:48,592 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 5 states and 144 transitions. [2024-06-27 19:32:48,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 575 flow [2024-06-27 19:32:48,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 544 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:48,600 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 383 flow [2024-06-27 19:32:48,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-06-27 19:32:48,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 19:32:48,603 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 383 flow [2024-06-27 19:32:48,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:48,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:48,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:32:48,604 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)] === [2024-06-27 19:32:48,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:48,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1067838237, now seen corresponding path program 2 times [2024-06-27 19:32:48,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:48,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284320999] [2024-06-27 19:32:48,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:48,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284320999] [2024-06-27 19:32:48,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284320999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:48,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602987438] [2024-06-27 19:32:48,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:48,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:48,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:48,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:48,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:48,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:48,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:48,861 INFO L124 PetriNetUnfolderBase]: 993/1672 cut-off events. [2024-06-27 19:32:48,861 INFO L125 PetriNetUnfolderBase]: For 4535/4535 co-relation queries the response was YES. [2024-06-27 19:32:48,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 1672 events. 993/1672 cut-off events. For 4535/4535 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8857 event pairs, 374 based on Foata normal form. 4/1670 useless extension candidates. Maximal degree in co-relation 5968. Up to 1359 conditions per place. [2024-06-27 19:32:48,872 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-27 19:32:48,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 691 flow [2024-06-27 19:32:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:48,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-27 19:32:48,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:32:48,874 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 383 flow. Second operand 5 states and 140 transitions. [2024-06-27 19:32:48,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 691 flow [2024-06-27 19:32:48,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 661 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:48,881 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 546 flow [2024-06-27 19:32:48,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-27 19:32:48,882 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 19:32:48,882 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 546 flow [2024-06-27 19:32:48,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:48,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:48,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:48,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:32:48,883 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)] === [2024-06-27 19:32:48,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:48,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1045936365, now seen corresponding path program 1 times [2024-06-27 19:32:48,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:48,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345553276] [2024-06-27 19:32:48,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:48,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:48,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:48,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:48,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345553276] [2024-06-27 19:32:48,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345553276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:48,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:48,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508101945] [2024-06-27 19:32:48,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:48,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:48,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:48,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:49,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:49,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:49,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:49,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:49,157 INFO L124 PetriNetUnfolderBase]: 995/1682 cut-off events. [2024-06-27 19:32:49,157 INFO L125 PetriNetUnfolderBase]: For 5890/5890 co-relation queries the response was YES. [2024-06-27 19:32:49,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1682 events. 995/1682 cut-off events. For 5890/5890 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8883 event pairs, 343 based on Foata normal form. 3/1683 useless extension candidates. Maximal degree in co-relation 6437. Up to 1456 conditions per place. [2024-06-27 19:32:49,168 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 72 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-27 19:32:49,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 822 flow [2024-06-27 19:32:49,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:49,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:49,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 19:32:49,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:32:49,170 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 546 flow. Second operand 5 states and 135 transitions. [2024-06-27 19:32:49,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 822 flow [2024-06-27 19:32:49,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 789 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:49,178 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 610 flow [2024-06-27 19:32:49,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-27 19:32:49,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-27 19:32:49,179 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 610 flow [2024-06-27 19:32:49,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:49,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:49,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:32:49,180 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:49,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:49,180 INFO L85 PathProgramCache]: Analyzing trace with hash -628573029, now seen corresponding path program 1 times [2024-06-27 19:32:49,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:49,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540602402] [2024-06-27 19:32:49,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:49,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:49,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:49,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:49,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540602402] [2024-06-27 19:32:49,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540602402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:49,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:49,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:32:49,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262553406] [2024-06-27 19:32:49,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:49,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:32:49,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:49,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:32:49,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:32:49,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:49,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 610 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:49,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:49,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:49,410 INFO L124 PetriNetUnfolderBase]: 983/1653 cut-off events. [2024-06-27 19:32:49,411 INFO L125 PetriNetUnfolderBase]: For 7065/7065 co-relation queries the response was YES. [2024-06-27 19:32:49,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 1653 events. 983/1653 cut-off events. For 7065/7065 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8639 event pairs, 355 based on Foata normal form. 2/1651 useless extension candidates. Maximal degree in co-relation 6602. Up to 1462 conditions per place. [2024-06-27 19:32:49,423 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 70 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-27 19:32:49,423 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 792 flow [2024-06-27 19:32:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:32:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:32:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-27 19:32:49,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:32:49,424 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 610 flow. Second operand 4 states and 105 transitions. [2024-06-27 19:32:49,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 792 flow [2024-06-27 19:32:49,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 762 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:49,433 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 610 flow [2024-06-27 19:32:49,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-27 19:32:49,435 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 19:32:49,435 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 610 flow [2024-06-27 19:32:49,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:49,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:49,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:32:49,436 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)] === [2024-06-27 19:32:49,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:49,436 INFO L85 PathProgramCache]: Analyzing trace with hash -199330566, now seen corresponding path program 1 times [2024-06-27 19:32:49,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:49,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014780538] [2024-06-27 19:32:49,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:49,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:49,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:49,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:49,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:49,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014780538] [2024-06-27 19:32:49,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014780538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:49,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:49,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:49,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538307137] [2024-06-27 19:32:49,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:49,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:49,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:49,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:49,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:49,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:49,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:49,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:49,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:49,746 INFO L124 PetriNetUnfolderBase]: 1017/1708 cut-off events. [2024-06-27 19:32:49,747 INFO L125 PetriNetUnfolderBase]: For 8020/8020 co-relation queries the response was YES. [2024-06-27 19:32:49,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6973 conditions, 1708 events. 1017/1708 cut-off events. For 8020/8020 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8944 event pairs, 334 based on Foata normal form. 3/1709 useless extension candidates. Maximal degree in co-relation 6940. Up to 1477 conditions per place. [2024-06-27 19:32:49,764 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-27 19:32:49,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 974 flow [2024-06-27 19:32:49,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:32:49,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-27 19:32:49,766 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 610 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:32:49,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 974 flow [2024-06-27 19:32:49,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 946 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:49,776 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 708 flow [2024-06-27 19:32:49,776 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=708, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2024-06-27 19:32:49,777 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-27 19:32:49,777 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 708 flow [2024-06-27 19:32:49,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:49,777 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:49,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:32:49,777 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)] === [2024-06-27 19:32:49,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:49,778 INFO L85 PathProgramCache]: Analyzing trace with hash -194568966, now seen corresponding path program 2 times [2024-06-27 19:32:49,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:49,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435018438] [2024-06-27 19:32:49,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:49,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:49,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:49,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:49,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435018438] [2024-06-27 19:32:49,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435018438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:49,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:49,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:49,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477075995] [2024-06-27 19:32:49,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:49,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:49,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:49,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:49,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:49,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:49,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 708 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:49,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:49,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:49,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:50,062 INFO L124 PetriNetUnfolderBase]: 1074/1810 cut-off events. [2024-06-27 19:32:50,063 INFO L125 PetriNetUnfolderBase]: For 10612/10612 co-relation queries the response was YES. [2024-06-27 19:32:50,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7903 conditions, 1810 events. 1074/1810 cut-off events. For 10612/10612 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9715 event pairs, 333 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 7869. Up to 1342 conditions per place. [2024-06-27 19:32:50,075 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 52 changer transitions 0/135 dead transitions. [2024-06-27 19:32:50,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 135 transitions, 1260 flow [2024-06-27 19:32:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:50,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:50,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-27 19:32:50,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-27 19:32:50,077 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 708 flow. Second operand 6 states and 173 transitions. [2024-06-27 19:32:50,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 135 transitions, 1260 flow [2024-06-27 19:32:50,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 135 transitions, 1208 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:32:50,089 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 943 flow [2024-06-27 19:32:50,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2024-06-27 19:32:50,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 19:32:50,090 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 943 flow [2024-06-27 19:32:50,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:50,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:50,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:32:50,091 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)] === [2024-06-27 19:32:50,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:50,092 INFO L85 PathProgramCache]: Analyzing trace with hash -831125468, now seen corresponding path program 1 times [2024-06-27 19:32:50,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:50,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822642886] [2024-06-27 19:32:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:50,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:50,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:50,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:50,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822642886] [2024-06-27 19:32:50,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822642886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:50,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:50,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:50,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624817918] [2024-06-27 19:32:50,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:50,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:50,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:50,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:50,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:50,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 943 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:50,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:50,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:50,419 INFO L124 PetriNetUnfolderBase]: 1107/1870 cut-off events. [2024-06-27 19:32:50,420 INFO L125 PetriNetUnfolderBase]: For 13716/13716 co-relation queries the response was YES. [2024-06-27 19:32:50,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1870 events. 1107/1870 cut-off events. For 13716/13716 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10171 event pairs, 324 based on Foata normal form. 4/1865 useless extension candidates. Maximal degree in co-relation 8903. Up to 1424 conditions per place. [2024-06-27 19:32:50,432 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-27 19:32:50,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1453 flow [2024-06-27 19:32:50,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:50,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:50,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-27 19:32:50,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-27 19:32:50,434 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 943 flow. Second operand 6 states and 171 transitions. [2024-06-27 19:32:50,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1453 flow [2024-06-27 19:32:50,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1393 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:50,451 INFO L231 Difference]: Finished difference. Result has 89 places, 120 transitions, 1106 flow [2024-06-27 19:32:50,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=120} [2024-06-27 19:32:50,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 19:32:50,452 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 120 transitions, 1106 flow [2024-06-27 19:32:50,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:50,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:50,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:32:50,453 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)] === [2024-06-27 19:32:50,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:50,453 INFO L85 PathProgramCache]: Analyzing trace with hash -747910820, now seen corresponding path program 3 times [2024-06-27 19:32:50,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:50,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313979090] [2024-06-27 19:32:50,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:50,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:50,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:50,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313979090] [2024-06-27 19:32:50,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313979090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:50,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:50,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:50,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776856853] [2024-06-27 19:32:50,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:50,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:50,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:50,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:50,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:50,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:50,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 120 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:50,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:50,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:50,801 INFO L124 PetriNetUnfolderBase]: 1122/1897 cut-off events. [2024-06-27 19:32:50,802 INFO L125 PetriNetUnfolderBase]: For 15861/15861 co-relation queries the response was YES. [2024-06-27 19:32:50,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9533 conditions, 1897 events. 1122/1897 cut-off events. For 15861/15861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10371 event pairs, 342 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 9492. Up to 1407 conditions per place. [2024-06-27 19:32:50,813 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-27 19:32:50,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 1578 flow [2024-06-27 19:32:50,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:50,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:50,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-27 19:32:50,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2024-06-27 19:32:50,815 INFO L175 Difference]: Start difference. First operand has 89 places, 120 transitions, 1106 flow. Second operand 6 states and 167 transitions. [2024-06-27 19:32:50,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 1578 flow [2024-06-27 19:32:50,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1529 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:50,833 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1309 flow [2024-06-27 19:32:50,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-27 19:32:50,833 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 19:32:50,834 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1309 flow [2024-06-27 19:32:50,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,834 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:50,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:50,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:32:50,834 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)] === [2024-06-27 19:32:50,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:50,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1916727322, now seen corresponding path program 2 times [2024-06-27 19:32:50,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:50,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383635750] [2024-06-27 19:32:50,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:50,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:50,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:50,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383635750] [2024-06-27 19:32:50,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383635750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:50,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:50,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:50,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232031793] [2024-06-27 19:32:50,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:50,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:50,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:50,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:50,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:50,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:50,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1309 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:50,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:50,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:50,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:51,142 INFO L124 PetriNetUnfolderBase]: 1177/2001 cut-off events. [2024-06-27 19:32:51,143 INFO L125 PetriNetUnfolderBase]: For 18973/18973 co-relation queries the response was YES. [2024-06-27 19:32:51,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10489 conditions, 2001 events. 1177/2001 cut-off events. For 18973/18973 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11090 event pairs, 330 based on Foata normal form. 4/2001 useless extension candidates. Maximal degree in co-relation 10444. Up to 1498 conditions per place. [2024-06-27 19:32:51,156 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2024-06-27 19:32:51,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 166 transitions, 1911 flow [2024-06-27 19:32:51,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:51,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:51,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-27 19:32:51,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-27 19:32:51,158 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1309 flow. Second operand 6 states and 170 transitions. [2024-06-27 19:32:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 166 transitions, 1911 flow [2024-06-27 19:32:51,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1832 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:51,181 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1515 flow [2024-06-27 19:32:51,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1515, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-27 19:32:51,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-27 19:32:51,182 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1515 flow [2024-06-27 19:32:51,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:51,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:51,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:32:51,183 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)] === [2024-06-27 19:32:51,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1925298202, now seen corresponding path program 3 times [2024-06-27 19:32:51,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:51,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504741724] [2024-06-27 19:32:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:51,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:51,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:51,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:51,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504741724] [2024-06-27 19:32:51,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504741724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:51,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:51,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:51,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410898557] [2024-06-27 19:32:51,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:51,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:51,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:51,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:51,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:51,286 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:51,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1515 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:51,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:51,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:51,483 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-27 19:32:51,483 INFO L125 PetriNetUnfolderBase]: For 21139/21139 co-relation queries the response was YES. [2024-06-27 19:32:51,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 1989 events. 1168/1989 cut-off events. For 21139/21139 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11024 event pairs, 330 based on Foata normal form. 4/1989 useless extension candidates. Maximal degree in co-relation 10607. Up to 1492 conditions per place. [2024-06-27 19:32:51,500 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-06-27 19:32:51,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 165 transitions, 1959 flow [2024-06-27 19:32:51,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:51,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-27 19:32:51,501 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:32:51,501 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1515 flow. Second operand 6 states and 168 transitions. [2024-06-27 19:32:51,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 165 transitions, 1959 flow [2024-06-27 19:32:51,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1907 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:51,534 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1576 flow [2024-06-27 19:32:51,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1576, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-27 19:32:51,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-27 19:32:51,535 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1576 flow [2024-06-27 19:32:51,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:51,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:51,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:32:51,535 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)] === [2024-06-27 19:32:51,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:51,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1925309114, now seen corresponding path program 1 times [2024-06-27 19:32:51,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:51,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008524507] [2024-06-27 19:32:51,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:51,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:51,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:51,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008524507] [2024-06-27 19:32:51,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008524507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:51,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:51,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:32:51,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558285507] [2024-06-27 19:32:51,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:51,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:32:51,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:51,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:32:51,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:32:51,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:51,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:51,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:51,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:51,842 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-27 19:32:51,842 INFO L125 PetriNetUnfolderBase]: For 23742/23742 co-relation queries the response was YES. [2024-06-27 19:32:51,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10997 conditions, 1989 events. 1168/1989 cut-off events. For 23742/23742 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10959 event pairs, 314 based on Foata normal form. 6/1993 useless extension candidates. Maximal degree in co-relation 10946. Up to 1681 conditions per place. [2024-06-27 19:32:51,858 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 138 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-27 19:32:51,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 2020 flow [2024-06-27 19:32:51,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:32:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:32:51,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:32:51,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 19:32:51,860 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1576 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:32:51,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 2020 flow [2024-06-27 19:32:51,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1909 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:51,888 INFO L231 Difference]: Finished difference. Result has 108 places, 146 transitions, 1567 flow [2024-06-27 19:32:51,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=108, PETRI_TRANSITIONS=146} [2024-06-27 19:32:51,890 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 19:32:51,890 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 146 transitions, 1567 flow [2024-06-27 19:32:51,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:51,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:51,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:51,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:32:51,891 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:51,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:51,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1989073823, now seen corresponding path program 1 times [2024-06-27 19:32:51,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:51,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631777166] [2024-06-27 19:32:51,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:51,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:51,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:51,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:51,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:51,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631777166] [2024-06-27 19:32:51,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631777166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977453708] [2024-06-27 19:32:51,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:51,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:52,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:52,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 146 transitions, 1567 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:52,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:52,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:52,206 INFO L124 PetriNetUnfolderBase]: 1160/1967 cut-off events. [2024-06-27 19:32:52,207 INFO L125 PetriNetUnfolderBase]: For 24840/24840 co-relation queries the response was YES. [2024-06-27 19:32:52,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 1967 events. 1160/1967 cut-off events. For 24840/24840 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10880 event pairs, 332 based on Foata normal form. 4/1962 useless extension candidates. Maximal degree in co-relation 10881. Up to 1613 conditions per place. [2024-06-27 19:32:52,221 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-27 19:32:52,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 157 transitions, 1949 flow [2024-06-27 19:32:52,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:52,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:52,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-27 19:32:52,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-27 19:32:52,223 INFO L175 Difference]: Start difference. First operand has 108 places, 146 transitions, 1567 flow. Second operand 5 states and 133 transitions. [2024-06-27 19:32:52,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 157 transitions, 1949 flow [2024-06-27 19:32:52,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1871 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:52,248 INFO L231 Difference]: Finished difference. Result has 109 places, 146 transitions, 1558 flow [2024-06-27 19:32:52,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1558, PETRI_PLACES=109, PETRI_TRANSITIONS=146} [2024-06-27 19:32:52,249 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-27 19:32:52,249 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 146 transitions, 1558 flow [2024-06-27 19:32:52,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:52,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:52,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:32:52,250 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:52,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:52,250 INFO L85 PathProgramCache]: Analyzing trace with hash 563819642, now seen corresponding path program 1 times [2024-06-27 19:32:52,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:52,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039637563] [2024-06-27 19:32:52,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:52,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:52,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:52,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:52,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:52,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039637563] [2024-06-27 19:32:52,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039637563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:52,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:52,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:52,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87680103] [2024-06-27 19:32:52,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:52,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:52,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:52,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:52,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:52,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:52,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 146 transitions, 1558 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:52,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:52,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:52,516 INFO L124 PetriNetUnfolderBase]: 1170/1993 cut-off events. [2024-06-27 19:32:52,516 INFO L125 PetriNetUnfolderBase]: For 26096/26096 co-relation queries the response was YES. [2024-06-27 19:32:52,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11176 conditions, 1993 events. 1170/1993 cut-off events. For 26096/26096 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11000 event pairs, 322 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 11123. Up to 1619 conditions per place. [2024-06-27 19:32:52,533 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 124 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-27 19:32:52,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 2054 flow [2024-06-27 19:32:52,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:52,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-27 19:32:52,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-27 19:32:52,535 INFO L175 Difference]: Start difference. First operand has 109 places, 146 transitions, 1558 flow. Second operand 5 states and 138 transitions. [2024-06-27 19:32:52,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 2054 flow [2024-06-27 19:32:52,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1940 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:52,568 INFO L231 Difference]: Finished difference. Result has 108 places, 150 transitions, 1597 flow [2024-06-27 19:32:52,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1597, PETRI_PLACES=108, PETRI_TRANSITIONS=150} [2024-06-27 19:32:52,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-27 19:32:52,569 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 150 transitions, 1597 flow [2024-06-27 19:32:52,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:52,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:52,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:32:52,569 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:52,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:52,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1531731770, now seen corresponding path program 2 times [2024-06-27 19:32:52,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:52,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138019348] [2024-06-27 19:32:52,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:52,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:52,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:52,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:52,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:52,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138019348] [2024-06-27 19:32:52,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138019348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:52,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:52,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:32:52,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837476639] [2024-06-27 19:32:52,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:52,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:32:52,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:52,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:32:52,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:32:52,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:52,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 150 transitions, 1597 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:52,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:52,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:52,841 INFO L124 PetriNetUnfolderBase]: 1142/1930 cut-off events. [2024-06-27 19:32:52,841 INFO L125 PetriNetUnfolderBase]: For 27273/27273 co-relation queries the response was YES. [2024-06-27 19:32:52,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 1930 events. 1142/1930 cut-off events. For 27273/27273 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10525 event pairs, 336 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 10741. Up to 1589 conditions per place. [2024-06-27 19:32:52,858 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 33 changer transitions 0/160 dead transitions. [2024-06-27 19:32:52,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 160 transitions, 1957 flow [2024-06-27 19:32:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:32:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:32:52,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-27 19:32:52,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-27 19:32:52,859 INFO L175 Difference]: Start difference. First operand has 108 places, 150 transitions, 1597 flow. Second operand 5 states and 132 transitions. [2024-06-27 19:32:52,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 160 transitions, 1957 flow [2024-06-27 19:32:52,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 1898 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:32:52,893 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1613 flow [2024-06-27 19:32:52,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2024-06-27 19:32:52,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-27 19:32:52,894 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1613 flow [2024-06-27 19:32:52,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:52,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:52,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:52,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:32:52,895 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)] === [2024-06-27 19:32:52,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:52,895 INFO L85 PathProgramCache]: Analyzing trace with hash -10456871, now seen corresponding path program 1 times [2024-06-27 19:32:52,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:52,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917759534] [2024-06-27 19:32:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:52,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:52,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:52,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917759534] [2024-06-27 19:32:52,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917759534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:52,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:52,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360050622] [2024-06-27 19:32:52,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:52,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:52,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:52,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:53,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:53,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1613 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:53,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:53,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:53,325 INFO L124 PetriNetUnfolderBase]: 1221/2074 cut-off events. [2024-06-27 19:32:53,325 INFO L125 PetriNetUnfolderBase]: For 31356/31356 co-relation queries the response was YES. [2024-06-27 19:32:53,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11669 conditions, 2074 events. 1221/2074 cut-off events. For 31356/31356 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11459 event pairs, 189 based on Foata normal form. 6/2078 useless extension candidates. Maximal degree in co-relation 11618. Up to 1650 conditions per place. [2024-06-27 19:32:53,343 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-27 19:32:53,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 195 transitions, 2291 flow [2024-06-27 19:32:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:53,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:53,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 19:32:53,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 19:32:53,344 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1613 flow. Second operand 8 states and 212 transitions. [2024-06-27 19:32:53,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 195 transitions, 2291 flow [2024-06-27 19:32:53,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 195 transitions, 2169 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:53,383 INFO L231 Difference]: Finished difference. Result has 114 places, 156 transitions, 1646 flow [2024-06-27 19:32:53,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1646, PETRI_PLACES=114, PETRI_TRANSITIONS=156} [2024-06-27 19:32:53,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-27 19:32:53,384 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 156 transitions, 1646 flow [2024-06-27 19:32:53,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:53,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:53,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:32:53,384 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)] === [2024-06-27 19:32:53,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:53,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1714077115, now seen corresponding path program 2 times [2024-06-27 19:32:53,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:53,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008634628] [2024-06-27 19:32:53,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:53,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:53,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:53,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008634628] [2024-06-27 19:32:53,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008634628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:53,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:53,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:53,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141229238] [2024-06-27 19:32:53,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:53,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:53,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:53,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:53,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:53,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:53,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 156 transitions, 1646 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:53,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:53,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:53,801 INFO L124 PetriNetUnfolderBase]: 1224/2073 cut-off events. [2024-06-27 19:32:53,801 INFO L125 PetriNetUnfolderBase]: For 33029/33029 co-relation queries the response was YES. [2024-06-27 19:32:53,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 2073 events. 1224/2073 cut-off events. For 33029/33029 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11416 event pairs, 288 based on Foata normal form. 6/2077 useless extension candidates. Maximal degree in co-relation 11930. Up to 1754 conditions per place. [2024-06-27 19:32:53,817 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-27 19:32:53,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 191 transitions, 2186 flow [2024-06-27 19:32:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:53,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:53,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:32:53,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-27 19:32:53,819 INFO L175 Difference]: Start difference. First operand has 114 places, 156 transitions, 1646 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:32:53,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 191 transitions, 2186 flow [2024-06-27 19:32:53,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 191 transitions, 2086 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:53,860 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1660 flow [2024-06-27 19:32:53,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1660, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2024-06-27 19:32:53,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 19:32:53,861 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1660 flow [2024-06-27 19:32:53,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:53,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:53,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:32:53,861 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)] === [2024-06-27 19:32:53,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:53,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1716878585, now seen corresponding path program 1 times [2024-06-27 19:32:53,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:53,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50073320] [2024-06-27 19:32:53,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:53,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:53,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:53,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:53,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50073320] [2024-06-27 19:32:53,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50073320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:53,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:53,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513525982] [2024-06-27 19:32:53,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:53,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:53,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:53,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:53,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:53,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:53,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1660 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:53,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:53,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:53,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:54,200 INFO L124 PetriNetUnfolderBase]: 1250/2117 cut-off events. [2024-06-27 19:32:54,200 INFO L125 PetriNetUnfolderBase]: For 34891/34891 co-relation queries the response was YES. [2024-06-27 19:32:54,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12204 conditions, 2117 events. 1250/2117 cut-off events. For 34891/34891 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11686 event pairs, 273 based on Foata normal form. 3/2118 useless extension candidates. Maximal degree in co-relation 12149. Up to 1797 conditions per place. [2024-06-27 19:32:54,217 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2024-06-27 19:32:54,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2242 flow [2024-06-27 19:32:54,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:32:54,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:32:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:32:54,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-27 19:32:54,218 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1660 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:32:54,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2242 flow [2024-06-27 19:32:54,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 197 transitions, 2174 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:54,291 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1745 flow [2024-06-27 19:32:54,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1745, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-06-27 19:32:54,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-27 19:32:54,292 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1745 flow [2024-06-27 19:32:54,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:54,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:54,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:54,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:32:54,292 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)] === [2024-06-27 19:32:54,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1997803929, now seen corresponding path program 3 times [2024-06-27 19:32:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:54,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996642240] [2024-06-27 19:32:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:54,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:54,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996642240] [2024-06-27 19:32:54,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996642240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:54,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:54,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304033749] [2024-06-27 19:32:54,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:54,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:54,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:54,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:54,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:54,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1745 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:54,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:54,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:54,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:54,693 INFO L124 PetriNetUnfolderBase]: 1303/2196 cut-off events. [2024-06-27 19:32:54,694 INFO L125 PetriNetUnfolderBase]: For 41822/41822 co-relation queries the response was YES. [2024-06-27 19:32:54,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12942 conditions, 2196 events. 1303/2196 cut-off events. For 41822/41822 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12129 event pairs, 283 based on Foata normal form. 14/2202 useless extension candidates. Maximal degree in co-relation 12886. Up to 1640 conditions per place. [2024-06-27 19:32:54,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-27 19:32:54,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2411 flow [2024-06-27 19:32:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:54,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 19:32:54,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-27 19:32:54,714 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1745 flow. Second operand 7 states and 199 transitions. [2024-06-27 19:32:54,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2411 flow [2024-06-27 19:32:54,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2329 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-27 19:32:54,754 INFO L231 Difference]: Finished difference. Result has 123 places, 169 transitions, 1870 flow [2024-06-27 19:32:54,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1870, PETRI_PLACES=123, PETRI_TRANSITIONS=169} [2024-06-27 19:32:54,755 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-27 19:32:54,755 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 169 transitions, 1870 flow [2024-06-27 19:32:54,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:54,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:54,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:54,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:32:54,756 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)] === [2024-06-27 19:32:54,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:54,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1997808889, now seen corresponding path program 2 times [2024-06-27 19:32:54,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:54,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532392862] [2024-06-27 19:32:54,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:54,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:54,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:54,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:54,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532392862] [2024-06-27 19:32:54,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532392862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:54,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:54,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:54,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499073894] [2024-06-27 19:32:54,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:54,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:54,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:54,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:54,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:54,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:54,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 169 transitions, 1870 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:54,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:54,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:54,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:55,119 INFO L124 PetriNetUnfolderBase]: 1380/2323 cut-off events. [2024-06-27 19:32:55,119 INFO L125 PetriNetUnfolderBase]: For 46034/46034 co-relation queries the response was YES. [2024-06-27 19:32:55,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14247 conditions, 2323 events. 1380/2323 cut-off events. For 46034/46034 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13044 event pairs, 286 based on Foata normal form. 4/2314 useless extension candidates. Maximal degree in co-relation 14189. Up to 1530 conditions per place. [2024-06-27 19:32:55,138 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 99 changer transitions 0/223 dead transitions. [2024-06-27 19:32:55,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 223 transitions, 2932 flow [2024-06-27 19:32:55,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:55,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:55,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-27 19:32:55,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2024-06-27 19:32:55,141 INFO L175 Difference]: Start difference. First operand has 123 places, 169 transitions, 1870 flow. Second operand 7 states and 204 transitions. [2024-06-27 19:32:55,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 223 transitions, 2932 flow [2024-06-27 19:32:55,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 223 transitions, 2765 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:55,191 INFO L231 Difference]: Finished difference. Result has 126 places, 190 transitions, 2207 flow [2024-06-27 19:32:55,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2207, PETRI_PLACES=126, PETRI_TRANSITIONS=190} [2024-06-27 19:32:55,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 19:32:55,192 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 190 transitions, 2207 flow [2024-06-27 19:32:55,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:32:55,193 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:55,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,194 INFO L85 PathProgramCache]: Analyzing trace with hash 2004475129, now seen corresponding path program 3 times [2024-06-27 19:32:55,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378756525] [2024-06-27 19:32:55,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:55,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378756525] [2024-06-27 19:32:55,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378756525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:55,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859242991] [2024-06-27 19:32:55,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:55,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:55,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:55,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:55,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 190 transitions, 2207 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:55,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:55,558 INFO L124 PetriNetUnfolderBase]: 1369/2308 cut-off events. [2024-06-27 19:32:55,558 INFO L125 PetriNetUnfolderBase]: For 49740/49740 co-relation queries the response was YES. [2024-06-27 19:32:55,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14593 conditions, 2308 events. 1369/2308 cut-off events. For 49740/49740 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12961 event pairs, 286 based on Foata normal form. 4/2299 useless extension candidates. Maximal degree in co-relation 14533. Up to 1521 conditions per place. [2024-06-27 19:32:55,576 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 101 changer transitions 0/222 dead transitions. [2024-06-27 19:32:55,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2971 flow [2024-06-27 19:32:55,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:55,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:55,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-27 19:32:55,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6870748299319728 [2024-06-27 19:32:55,577 INFO L175 Difference]: Start difference. First operand has 126 places, 190 transitions, 2207 flow. Second operand 7 states and 202 transitions. [2024-06-27 19:32:55,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2971 flow [2024-06-27 19:32:55,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 222 transitions, 2827 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-06-27 19:32:55,647 INFO L231 Difference]: Finished difference. Result has 133 places, 190 transitions, 2275 flow [2024-06-27 19:32:55,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=133, PETRI_TRANSITIONS=190} [2024-06-27 19:32:55,647 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 19:32:55,647 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 190 transitions, 2275 flow [2024-06-27 19:32:55,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:55,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:55,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:32:55,648 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:55,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:55,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2004484057, now seen corresponding path program 1 times [2024-06-27 19:32:55,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:55,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901669316] [2024-06-27 19:32:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:55,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:55,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:55,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901669316] [2024-06-27 19:32:55,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901669316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:55,726 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:55,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:55,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638780216] [2024-06-27 19:32:55,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:55,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:55,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:55,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:55,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:55,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:55,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 190 transitions, 2275 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:55,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:55,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:55,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:56,081 INFO L124 PetriNetUnfolderBase]: 1422/2390 cut-off events. [2024-06-27 19:32:56,081 INFO L125 PetriNetUnfolderBase]: For 58062/58062 co-relation queries the response was YES. [2024-06-27 19:32:56,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15385 conditions, 2390 events. 1422/2390 cut-off events. For 58062/58062 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13485 event pairs, 296 based on Foata normal form. 14/2394 useless extension candidates. Maximal degree in co-relation 15322. Up to 1836 conditions per place. [2024-06-27 19:32:56,101 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 59 changer transitions 0/225 dead transitions. [2024-06-27 19:32:56,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 2965 flow [2024-06-27 19:32:56,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:56,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:56,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-27 19:32:56,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6700680272108843 [2024-06-27 19:32:56,103 INFO L175 Difference]: Start difference. First operand has 133 places, 190 transitions, 2275 flow. Second operand 7 states and 197 transitions. [2024-06-27 19:32:56,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 2965 flow [2024-06-27 19:32:56,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 2759 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:56,162 INFO L231 Difference]: Finished difference. Result has 135 places, 193 transitions, 2270 flow [2024-06-27 19:32:56,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2270, PETRI_PLACES=135, PETRI_TRANSITIONS=193} [2024-06-27 19:32:56,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-27 19:32:56,163 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 193 transitions, 2270 flow [2024-06-27 19:32:56,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:56,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:56,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:32:56,164 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:56,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:56,164 INFO L85 PathProgramCache]: Analyzing trace with hash -682735781, now seen corresponding path program 4 times [2024-06-27 19:32:56,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:56,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865753186] [2024-06-27 19:32:56,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:56,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:56,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:56,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865753186] [2024-06-27 19:32:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865753186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:56,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:56,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885435256] [2024-06-27 19:32:56,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:56,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:56,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:56,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:56,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:56,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:56,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 193 transitions, 2270 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:56,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:56,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:56,642 INFO L124 PetriNetUnfolderBase]: 1460/2461 cut-off events. [2024-06-27 19:32:56,643 INFO L125 PetriNetUnfolderBase]: For 60412/60412 co-relation queries the response was YES. [2024-06-27 19:32:56,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15730 conditions, 2461 events. 1460/2461 cut-off events. For 60412/60412 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13990 event pairs, 312 based on Foata normal form. 14/2469 useless extension candidates. Maximal degree in co-relation 15666. Up to 1866 conditions per place. [2024-06-27 19:32:56,660 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 61 changer transitions 0/225 dead transitions. [2024-06-27 19:32:56,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 2966 flow [2024-06-27 19:32:56,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:56,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-27 19:32:56,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-27 19:32:56,662 INFO L175 Difference]: Start difference. First operand has 135 places, 193 transitions, 2270 flow. Second operand 7 states and 194 transitions. [2024-06-27 19:32:56,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 2966 flow [2024-06-27 19:32:56,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 225 transitions, 2807 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:56,722 INFO L231 Difference]: Finished difference. Result has 137 places, 196 transitions, 2326 flow [2024-06-27 19:32:56,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2326, PETRI_PLACES=137, PETRI_TRANSITIONS=196} [2024-06-27 19:32:56,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-27 19:32:56,723 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 196 transitions, 2326 flow [2024-06-27 19:32:56,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:56,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:56,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:32:56,724 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:56,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:56,724 INFO L85 PathProgramCache]: Analyzing trace with hash -565996295, now seen corresponding path program 4 times [2024-06-27 19:32:56,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:56,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254579928] [2024-06-27 19:32:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:56,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:56,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254579928] [2024-06-27 19:32:56,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254579928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:56,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:56,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:56,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139142544] [2024-06-27 19:32:56,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:56,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:56,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:56,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:56,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:56,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:56,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 196 transitions, 2326 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:56,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:56,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:56,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:57,117 INFO L124 PetriNetUnfolderBase]: 1539/2597 cut-off events. [2024-06-27 19:32:57,117 INFO L125 PetriNetUnfolderBase]: For 64940/64940 co-relation queries the response was YES. [2024-06-27 19:32:57,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 2597 events. 1539/2597 cut-off events. For 64940/64940 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14979 event pairs, 320 based on Foata normal form. 4/2595 useless extension candidates. Maximal degree in co-relation 16773. Up to 1742 conditions per place. [2024-06-27 19:32:57,136 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 106 changer transitions 0/243 dead transitions. [2024-06-27 19:32:57,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 243 transitions, 3460 flow [2024-06-27 19:32:57,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:57,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-27 19:32:57,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-27 19:32:57,137 INFO L175 Difference]: Start difference. First operand has 137 places, 196 transitions, 2326 flow. Second operand 7 states and 201 transitions. [2024-06-27 19:32:57,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 243 transitions, 3460 flow [2024-06-27 19:32:57,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 243 transitions, 3287 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:57,208 INFO L231 Difference]: Finished difference. Result has 139 places, 214 transitions, 2679 flow [2024-06-27 19:32:57,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2679, PETRI_PLACES=139, PETRI_TRANSITIONS=214} [2024-06-27 19:32:57,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 19:32:57,209 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 214 transitions, 2679 flow [2024-06-27 19:32:57,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:57,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:57,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:32:57,209 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:57,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:57,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1646958669, now seen corresponding path program 5 times [2024-06-27 19:32:57,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:57,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275033442] [2024-06-27 19:32:57,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:57,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:57,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:57,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:57,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275033442] [2024-06-27 19:32:57,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275033442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:57,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:57,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:57,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304631852] [2024-06-27 19:32:57,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:57,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:57,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:57,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:57,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:57,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:57,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 214 transitions, 2679 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:57,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:57,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:57,621 INFO L124 PetriNetUnfolderBase]: 1530/2585 cut-off events. [2024-06-27 19:32:57,621 INFO L125 PetriNetUnfolderBase]: For 66640/66640 co-relation queries the response was YES. [2024-06-27 19:32:57,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16850 conditions, 2585 events. 1530/2585 cut-off events. For 66640/66640 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14891 event pairs, 320 based on Foata normal form. 4/2583 useless extension candidates. Maximal degree in co-relation 16784. Up to 1736 conditions per place. [2024-06-27 19:32:57,646 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 107 changer transitions 0/241 dead transitions. [2024-06-27 19:32:57,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 241 transitions, 3417 flow [2024-06-27 19:32:57,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:57,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:57,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-27 19:32:57,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-27 19:32:57,648 INFO L175 Difference]: Start difference. First operand has 139 places, 214 transitions, 2679 flow. Second operand 7 states and 198 transitions. [2024-06-27 19:32:57,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 241 transitions, 3417 flow [2024-06-27 19:32:57,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 241 transitions, 3255 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-27 19:32:57,740 INFO L231 Difference]: Finished difference. Result has 145 places, 214 transitions, 2741 flow [2024-06-27 19:32:57,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2741, PETRI_PLACES=145, PETRI_TRANSITIONS=214} [2024-06-27 19:32:57,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-27 19:32:57,741 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 214 transitions, 2741 flow [2024-06-27 19:32:57,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:57,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:57,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:32:57,742 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:57,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:57,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1772588459, now seen corresponding path program 6 times [2024-06-27 19:32:57,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:57,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678863287] [2024-06-27 19:32:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:57,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:57,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:57,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:57,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:57,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678863287] [2024-06-27 19:32:57,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678863287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:57,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:57,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:57,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590170179] [2024-06-27 19:32:57,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:57,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:57,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:57,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:57,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:57,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 214 transitions, 2741 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:57,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:57,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:57,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:58,162 INFO L124 PetriNetUnfolderBase]: 1521/2576 cut-off events. [2024-06-27 19:32:58,162 INFO L125 PetriNetUnfolderBase]: For 68643/68643 co-relation queries the response was YES. [2024-06-27 19:32:58,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17000 conditions, 2576 events. 1521/2576 cut-off events. For 68643/68643 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14874 event pairs, 318 based on Foata normal form. 4/2574 useless extension candidates. Maximal degree in co-relation 16932. Up to 1730 conditions per place. [2024-06-27 19:32:58,181 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 106 changer transitions 0/240 dead transitions. [2024-06-27 19:32:58,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 240 transitions, 3435 flow [2024-06-27 19:32:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-27 19:32:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:32:58,182 INFO L175 Difference]: Start difference. First operand has 145 places, 214 transitions, 2741 flow. Second operand 7 states and 196 transitions. [2024-06-27 19:32:58,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 240 transitions, 3435 flow [2024-06-27 19:32:58,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 240 transitions, 3138 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:58,275 INFO L231 Difference]: Finished difference. Result has 146 places, 214 transitions, 2666 flow [2024-06-27 19:32:58,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2666, PETRI_PLACES=146, PETRI_TRANSITIONS=214} [2024-06-27 19:32:58,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-27 19:32:58,276 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 214 transitions, 2666 flow [2024-06-27 19:32:58,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:58,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:58,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:32:58,277 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:58,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:58,277 INFO L85 PathProgramCache]: Analyzing trace with hash -565987367, now seen corresponding path program 2 times [2024-06-27 19:32:58,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:58,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824148980] [2024-06-27 19:32:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:58,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:58,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824148980] [2024-06-27 19:32:58,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824148980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:58,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:58,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:58,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962327688] [2024-06-27 19:32:58,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:58,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:58,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:58,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:58,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:58,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:58,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 214 transitions, 2666 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:58,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:58,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:58,726 INFO L124 PetriNetUnfolderBase]: 1584/2678 cut-off events. [2024-06-27 19:32:58,726 INFO L125 PetriNetUnfolderBase]: For 77392/77392 co-relation queries the response was YES. [2024-06-27 19:32:58,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17416 conditions, 2678 events. 1584/2678 cut-off events. For 77392/77392 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15465 event pairs, 314 based on Foata normal form. 14/2688 useless extension candidates. Maximal degree in co-relation 17348. Up to 2074 conditions per place. [2024-06-27 19:32:58,747 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-27 19:32:58,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 246 transitions, 3418 flow [2024-06-27 19:32:58,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:58,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:58,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 19:32:58,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-27 19:32:58,748 INFO L175 Difference]: Start difference. First operand has 146 places, 214 transitions, 2666 flow. Second operand 7 states and 195 transitions. [2024-06-27 19:32:58,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 246 transitions, 3418 flow [2024-06-27 19:32:58,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 3206 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:32:58,851 INFO L231 Difference]: Finished difference. Result has 147 places, 217 transitions, 2659 flow [2024-06-27 19:32:58,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=147, PETRI_TRANSITIONS=217} [2024-06-27 19:32:58,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-27 19:32:58,852 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 217 transitions, 2659 flow [2024-06-27 19:32:58,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:58,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:58,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:32:58,852 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:58,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:58,853 INFO L85 PathProgramCache]: Analyzing trace with hash -919306279, now seen corresponding path program 3 times [2024-06-27 19:32:58,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:58,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439691997] [2024-06-27 19:32:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:58,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439691997] [2024-06-27 19:32:58,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439691997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:58,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:58,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:58,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708490578] [2024-06-27 19:32:58,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:58,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:58,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:58,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:58,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:58,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:58,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 217 transitions, 2659 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:58,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:58,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:58,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:59,349 INFO L124 PetriNetUnfolderBase]: 1647/2790 cut-off events. [2024-06-27 19:32:59,349 INFO L125 PetriNetUnfolderBase]: For 82484/82484 co-relation queries the response was YES. [2024-06-27 19:32:59,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18061 conditions, 2790 events. 1647/2790 cut-off events. For 82484/82484 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16315 event pairs, 325 based on Foata normal form. 14/2800 useless extension candidates. Maximal degree in co-relation 17992. Up to 2175 conditions per place. [2024-06-27 19:32:59,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 56 changer transitions 0/250 dead transitions. [2024-06-27 19:32:59,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 250 transitions, 3491 flow [2024-06-27 19:32:59,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:59,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:59,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-27 19:32:59,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-27 19:32:59,374 INFO L175 Difference]: Start difference. First operand has 147 places, 217 transitions, 2659 flow. Second operand 7 states and 195 transitions. [2024-06-27 19:32:59,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 250 transitions, 3491 flow [2024-06-27 19:32:59,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 250 transitions, 3328 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:32:59,465 INFO L231 Difference]: Finished difference. Result has 149 places, 220 transitions, 2705 flow [2024-06-27 19:32:59,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2705, PETRI_PLACES=149, PETRI_TRANSITIONS=220} [2024-06-27 19:32:59,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-27 19:32:59,466 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 220 transitions, 2705 flow [2024-06-27 19:32:59,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:59,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:32:59,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:32:59,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:32:59,466 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:32:59,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:32:59,467 INFO L85 PathProgramCache]: Analyzing trace with hash -908830759, now seen corresponding path program 4 times [2024-06-27 19:32:59,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:32:59,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774762310] [2024-06-27 19:32:59,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:32:59,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:32:59,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:32:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:32:59,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:32:59,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774762310] [2024-06-27 19:32:59,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774762310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:32:59,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:32:59,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:32:59,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145510218] [2024-06-27 19:32:59,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:32:59,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:32:59,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:32:59,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:32:59,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:32:59,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:32:59,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 220 transitions, 2705 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:32:59,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:32:59,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:32:59,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:32:59,953 INFO L124 PetriNetUnfolderBase]: 1777/3028 cut-off events. [2024-06-27 19:32:59,953 INFO L125 PetriNetUnfolderBase]: For 94250/94250 co-relation queries the response was YES. [2024-06-27 19:32:59,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19590 conditions, 3028 events. 1777/3028 cut-off events. For 94250/94250 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18172 event pairs, 320 based on Foata normal form. 14/3038 useless extension candidates. Maximal degree in co-relation 19520. Up to 2012 conditions per place. [2024-06-27 19:32:59,976 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 63 changer transitions 0/260 dead transitions. [2024-06-27 19:32:59,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 260 transitions, 3681 flow [2024-06-27 19:32:59,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:32:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:32:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-27 19:32:59,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-27 19:32:59,978 INFO L175 Difference]: Start difference. First operand has 149 places, 220 transitions, 2705 flow. Second operand 7 states and 199 transitions. [2024-06-27 19:32:59,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 260 transitions, 3681 flow [2024-06-27 19:33:00,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 260 transitions, 3514 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:00,093 INFO L231 Difference]: Finished difference. Result has 152 places, 225 transitions, 2813 flow [2024-06-27 19:33:00,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2813, PETRI_PLACES=152, PETRI_TRANSITIONS=225} [2024-06-27 19:33:00,094 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 19:33:00,094 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 225 transitions, 2813 flow [2024-06-27 19:33:00,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:00,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:00,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:33:00,095 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)] === [2024-06-27 19:33:00,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:00,095 INFO L85 PathProgramCache]: Analyzing trace with hash 239261120, now seen corresponding path program 1 times [2024-06-27 19:33:00,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:00,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315061647] [2024-06-27 19:33:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:00,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:00,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:00,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:00,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315061647] [2024-06-27 19:33:00,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315061647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:00,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:00,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:33:00,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282676758] [2024-06-27 19:33:00,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:00,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:33:00,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:00,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:33:00,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:33:00,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:00,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 225 transitions, 2813 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:00,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:00,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:00,459 INFO L124 PetriNetUnfolderBase]: 1787/3047 cut-off events. [2024-06-27 19:33:00,459 INFO L125 PetriNetUnfolderBase]: For 93195/93195 co-relation queries the response was YES. [2024-06-27 19:33:00,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 3047 events. 1787/3047 cut-off events. For 93195/93195 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18332 event pairs, 377 based on Foata normal form. 2/3045 useless extension candidates. Maximal degree in co-relation 20175. Up to 2574 conditions per place. [2024-06-27 19:33:00,483 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-27 19:33:00,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 242 transitions, 3447 flow [2024-06-27 19:33:00,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:00,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:00,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-27 19:33:00,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-27 19:33:00,484 INFO L175 Difference]: Start difference. First operand has 152 places, 225 transitions, 2813 flow. Second operand 5 states and 134 transitions. [2024-06-27 19:33:00,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 242 transitions, 3447 flow [2024-06-27 19:33:00,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 242 transitions, 3306 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:00,602 INFO L231 Difference]: Finished difference. Result has 154 places, 229 transitions, 2829 flow [2024-06-27 19:33:00,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2829, PETRI_PLACES=154, PETRI_TRANSITIONS=229} [2024-06-27 19:33:00,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 19:33:00,602 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 229 transitions, 2829 flow [2024-06-27 19:33:00,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:00,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:00,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:33:00,603 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:00,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 239528030, now seen corresponding path program 2 times [2024-06-27 19:33:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:00,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623761394] [2024-06-27 19:33:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:00,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:00,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:00,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:00,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:00,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623761394] [2024-06-27 19:33:00,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623761394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:00,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:00,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:33:00,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313975953] [2024-06-27 19:33:00,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:00,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:33:00,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:00,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:33:00,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:33:00,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:00,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 229 transitions, 2829 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:00,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:00,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:00,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:00,968 INFO L124 PetriNetUnfolderBase]: 1751/2976 cut-off events. [2024-06-27 19:33:00,968 INFO L125 PetriNetUnfolderBase]: For 94048/94048 co-relation queries the response was YES. [2024-06-27 19:33:00,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19786 conditions, 2976 events. 1751/2976 cut-off events. For 94048/94048 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17823 event pairs, 386 based on Foata normal form. 2/2969 useless extension candidates. Maximal degree in co-relation 19712. Up to 2518 conditions per place. [2024-06-27 19:33:00,994 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 195 selfloop transitions, 34 changer transitions 0/238 dead transitions. [2024-06-27 19:33:00,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 3309 flow [2024-06-27 19:33:00,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:00,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:00,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-27 19:33:00,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-27 19:33:00,994 INFO L175 Difference]: Start difference. First operand has 154 places, 229 transitions, 2829 flow. Second operand 5 states and 129 transitions. [2024-06-27 19:33:00,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 3309 flow [2024-06-27 19:33:01,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 238 transitions, 3257 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:01,114 INFO L231 Difference]: Finished difference. Result has 157 places, 229 transitions, 2852 flow [2024-06-27 19:33:01,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2852, PETRI_PLACES=157, PETRI_TRANSITIONS=229} [2024-06-27 19:33:01,115 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 19:33:01,115 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 229 transitions, 2852 flow [2024-06-27 19:33:01,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:01,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:01,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:33:01,116 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:01,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:01,116 INFO L85 PathProgramCache]: Analyzing trace with hash 239537950, now seen corresponding path program 1 times [2024-06-27 19:33:01,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:01,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674501756] [2024-06-27 19:33:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:01,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:01,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:01,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:01,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674501756] [2024-06-27 19:33:01,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674501756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:01,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:01,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:01,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45326761] [2024-06-27 19:33:01,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:01,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:01,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:01,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:01,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:01,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 229 transitions, 2852 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:01,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:01,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:01,516 INFO L124 PetriNetUnfolderBase]: 1770/2999 cut-off events. [2024-06-27 19:33:01,516 INFO L125 PetriNetUnfolderBase]: For 101681/101681 co-relation queries the response was YES. [2024-06-27 19:33:01,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20052 conditions, 2999 events. 1770/2999 cut-off events. For 101681/101681 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17838 event pairs, 381 based on Foata normal form. 8/2998 useless extension candidates. Maximal degree in co-relation 19977. Up to 2523 conditions per place. [2024-06-27 19:33:01,541 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2024-06-27 19:33:01,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 244 transitions, 3404 flow [2024-06-27 19:33:01,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:01,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:01,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:33:01,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:33:01,542 INFO L175 Difference]: Start difference. First operand has 157 places, 229 transitions, 2852 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:33:01,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 244 transitions, 3404 flow [2024-06-27 19:33:01,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 244 transitions, 3268 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:01,690 INFO L231 Difference]: Finished difference. Result has 157 places, 233 transitions, 2869 flow [2024-06-27 19:33:01,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2869, PETRI_PLACES=157, PETRI_TRANSITIONS=233} [2024-06-27 19:33:01,690 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 19:33:01,690 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 233 transitions, 2869 flow [2024-06-27 19:33:01,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:01,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:01,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:33:01,691 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:01,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1876271683, now seen corresponding path program 1 times [2024-06-27 19:33:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:01,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277100556] [2024-06-27 19:33:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:01,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:01,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:01,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:01,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277100556] [2024-06-27 19:33:01,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277100556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:01,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:01,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:01,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091113109] [2024-06-27 19:33:01,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:01,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:01,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:01,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:01,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:01,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:01,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 233 transitions, 2869 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:01,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:01,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:01,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:02,122 INFO L124 PetriNetUnfolderBase]: 1757/2995 cut-off events. [2024-06-27 19:33:02,123 INFO L125 PetriNetUnfolderBase]: For 99917/99917 co-relation queries the response was YES. [2024-06-27 19:33:02,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20161 conditions, 2995 events. 1757/2995 cut-off events. For 99917/99917 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17819 event pairs, 350 based on Foata normal form. 2/2995 useless extension candidates. Maximal degree in co-relation 20086. Up to 2597 conditions per place. [2024-06-27 19:33:02,151 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-27 19:33:02,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 259 transitions, 3435 flow [2024-06-27 19:33:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:02,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:33:02,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 19:33:02,152 INFO L175 Difference]: Start difference. First operand has 157 places, 233 transitions, 2869 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:33:02,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 259 transitions, 3435 flow [2024-06-27 19:33:02,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3302 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:02,268 INFO L231 Difference]: Finished difference. Result has 160 places, 233 transitions, 2780 flow [2024-06-27 19:33:02,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2780, PETRI_PLACES=160, PETRI_TRANSITIONS=233} [2024-06-27 19:33:02,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 19:33:02,269 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 233 transitions, 2780 flow [2024-06-27 19:33:02,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:02,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:02,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:33:02,270 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:02,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:02,270 INFO L85 PathProgramCache]: Analyzing trace with hash -61543689, now seen corresponding path program 2 times [2024-06-27 19:33:02,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:02,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266647279] [2024-06-27 19:33:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:02,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:02,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:02,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266647279] [2024-06-27 19:33:02,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266647279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:02,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:02,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122809414] [2024-06-27 19:33:02,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:02,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:02,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:02,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:02,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:02,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 233 transitions, 2780 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:02,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:02,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:02,692 INFO L124 PetriNetUnfolderBase]: 1775/3019 cut-off events. [2024-06-27 19:33:02,692 INFO L125 PetriNetUnfolderBase]: For 104874/104874 co-relation queries the response was YES. [2024-06-27 19:33:02,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 3019 events. 1775/3019 cut-off events. For 104874/104874 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17992 event pairs, 361 based on Foata normal form. 2/3011 useless extension candidates. Maximal degree in co-relation 20150. Up to 2407 conditions per place. [2024-06-27 19:33:02,723 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 72 changer transitions 0/259 dead transitions. [2024-06-27 19:33:02,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 259 transitions, 3644 flow [2024-06-27 19:33:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:02,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:02,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-27 19:33:02,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-27 19:33:02,724 INFO L175 Difference]: Start difference. First operand has 160 places, 233 transitions, 2780 flow. Second operand 6 states and 163 transitions. [2024-06-27 19:33:02,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 259 transitions, 3644 flow [2024-06-27 19:33:02,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3608 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:02,859 INFO L231 Difference]: Finished difference. Result has 160 places, 240 transitions, 2999 flow [2024-06-27 19:33:02,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2999, PETRI_PLACES=160, PETRI_TRANSITIONS=240} [2024-06-27 19:33:02,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-27 19:33:02,859 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 240 transitions, 2999 flow [2024-06-27 19:33:02,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:02,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:02,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:33:02,860 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:02,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:02,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1179525671, now seen corresponding path program 3 times [2024-06-27 19:33:02,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:02,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540168179] [2024-06-27 19:33:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:02,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:02,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:02,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:02,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:02,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540168179] [2024-06-27 19:33:02,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540168179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:02,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:02,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:02,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266343457] [2024-06-27 19:33:02,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:02,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:02,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:02,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:02,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:02,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:02,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 240 transitions, 2999 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:02,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:02,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:02,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:03,275 INFO L124 PetriNetUnfolderBase]: 1763/2979 cut-off events. [2024-06-27 19:33:03,276 INFO L125 PetriNetUnfolderBase]: For 109935/109935 co-relation queries the response was YES. [2024-06-27 19:33:03,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20301 conditions, 2979 events. 1763/2979 cut-off events. For 109935/109935 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17756 event pairs, 397 based on Foata normal form. 4/2969 useless extension candidates. Maximal degree in co-relation 20224. Up to 2399 conditions per place. [2024-06-27 19:33:03,306 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 65 changer transitions 0/252 dead transitions. [2024-06-27 19:33:03,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 252 transitions, 3661 flow [2024-06-27 19:33:03,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:03,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:03,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:33:03,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 19:33:03,308 INFO L175 Difference]: Start difference. First operand has 160 places, 240 transitions, 2999 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:33:03,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 252 transitions, 3661 flow [2024-06-27 19:33:03,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 252 transitions, 3559 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:03,486 INFO L231 Difference]: Finished difference. Result has 164 places, 240 transitions, 3035 flow [2024-06-27 19:33:03,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=164, PETRI_TRANSITIONS=240} [2024-06-27 19:33:03,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 19:33:03,487 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 240 transitions, 3035 flow [2024-06-27 19:33:03,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:03,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:03,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:33:03,487 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:03,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:03,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1006188873, now seen corresponding path program 1 times [2024-06-27 19:33:03,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:03,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090149572] [2024-06-27 19:33:03,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:03,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:03,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:03,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:03,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090149572] [2024-06-27 19:33:03,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090149572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:03,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:03,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:03,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295778465] [2024-06-27 19:33:03,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:03,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:03,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:03,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:03,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 240 transitions, 3035 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:03,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:03,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:03,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:03,900 INFO L124 PetriNetUnfolderBase]: 1768/3013 cut-off events. [2024-06-27 19:33:03,900 INFO L125 PetriNetUnfolderBase]: For 111484/111484 co-relation queries the response was YES. [2024-06-27 19:33:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3013 events. 1768/3013 cut-off events. For 111484/111484 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17976 event pairs, 349 based on Foata normal form. 1/3012 useless extension candidates. Maximal degree in co-relation 20442. Up to 2624 conditions per place. [2024-06-27 19:33:03,928 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 231 selfloop transitions, 20 changer transitions 0/260 dead transitions. [2024-06-27 19:33:03,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 260 transitions, 3691 flow [2024-06-27 19:33:03,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:03,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-27 19:33:03,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-27 19:33:03,929 INFO L175 Difference]: Start difference. First operand has 164 places, 240 transitions, 3035 flow. Second operand 6 states and 154 transitions. [2024-06-27 19:33:03,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 260 transitions, 3691 flow [2024-06-27 19:33:04,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3417 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:04,076 INFO L231 Difference]: Finished difference. Result has 162 places, 243 transitions, 2843 flow [2024-06-27 19:33:04,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2843, PETRI_PLACES=162, PETRI_TRANSITIONS=243} [2024-06-27 19:33:04,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 19:33:04,077 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 243 transitions, 2843 flow [2024-06-27 19:33:04,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:04,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:04,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:33:04,078 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:04,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:04,078 INFO L85 PathProgramCache]: Analyzing trace with hash -994970397, now seen corresponding path program 2 times [2024-06-27 19:33:04,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:04,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427654616] [2024-06-27 19:33:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:04,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:04,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:04,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:04,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427654616] [2024-06-27 19:33:04,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427654616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:04,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:04,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:33:04,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705553435] [2024-06-27 19:33:04,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:04,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:33:04,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:04,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:33:04,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:33:04,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:04,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 243 transitions, 2843 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:04,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:04,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:04,445 INFO L124 PetriNetUnfolderBase]: 1765/3001 cut-off events. [2024-06-27 19:33:04,445 INFO L125 PetriNetUnfolderBase]: For 113627/113627 co-relation queries the response was YES. [2024-06-27 19:33:04,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20188 conditions, 3001 events. 1765/3001 cut-off events. For 113627/113627 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17855 event pairs, 356 based on Foata normal form. 1/2995 useless extension candidates. Maximal degree in co-relation 20112. Up to 2621 conditions per place. [2024-06-27 19:33:04,470 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 223 selfloop transitions, 20 changer transitions 0/252 dead transitions. [2024-06-27 19:33:04,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 252 transitions, 3351 flow [2024-06-27 19:33:04,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:33:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:33:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-27 19:33:04,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-27 19:33:04,471 INFO L175 Difference]: Start difference. First operand has 162 places, 243 transitions, 2843 flow. Second operand 5 states and 127 transitions. [2024-06-27 19:33:04,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 252 transitions, 3351 flow [2024-06-27 19:33:04,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 252 transitions, 3301 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:04,624 INFO L231 Difference]: Finished difference. Result has 163 places, 243 transitions, 2839 flow [2024-06-27 19:33:04,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2839, PETRI_PLACES=163, PETRI_TRANSITIONS=243} [2024-06-27 19:33:04,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-27 19:33:04,624 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 243 transitions, 2839 flow [2024-06-27 19:33:04,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:04,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:04,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:33:04,624 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)] === [2024-06-27 19:33:04,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:04,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2097402408, now seen corresponding path program 1 times [2024-06-27 19:33:04,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:04,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637689704] [2024-06-27 19:33:04,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:04,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:04,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:04,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:04,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637689704] [2024-06-27 19:33:04,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637689704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:04,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:04,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:04,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188289433] [2024-06-27 19:33:04,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:04,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:04,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:04,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:04,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:04,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 243 transitions, 2839 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:04,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:04,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:04,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:05,165 INFO L124 PetriNetUnfolderBase]: 1965/3334 cut-off events. [2024-06-27 19:33:05,165 INFO L125 PetriNetUnfolderBase]: For 153693/153693 co-relation queries the response was YES. [2024-06-27 19:33:05,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23539 conditions, 3334 events. 1965/3334 cut-off events. For 153693/153693 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20347 event pairs, 312 based on Foata normal form. 18/3348 useless extension candidates. Maximal degree in co-relation 23462. Up to 2459 conditions per place. [2024-06-27 19:33:05,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 256 selfloop transitions, 30 changer transitions 0/295 dead transitions. [2024-06-27 19:33:05,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 295 transitions, 3927 flow [2024-06-27 19:33:05,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:05,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:05,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-27 19:33:05,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375661375661376 [2024-06-27 19:33:05,197 INFO L175 Difference]: Start difference. First operand has 163 places, 243 transitions, 2839 flow. Second operand 9 states and 241 transitions. [2024-06-27 19:33:05,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 295 transitions, 3927 flow [2024-06-27 19:33:05,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 295 transitions, 3871 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:05,347 INFO L231 Difference]: Finished difference. Result has 168 places, 246 transitions, 2966 flow [2024-06-27 19:33:05,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2966, PETRI_PLACES=168, PETRI_TRANSITIONS=246} [2024-06-27 19:33:05,347 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-27 19:33:05,347 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 246 transitions, 2966 flow [2024-06-27 19:33:05,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:05,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:05,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:33:05,348 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)] === [2024-06-27 19:33:05,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:05,348 INFO L85 PathProgramCache]: Analyzing trace with hash 648136152, now seen corresponding path program 2 times [2024-06-27 19:33:05,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:05,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96809838] [2024-06-27 19:33:05,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:05,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:05,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:05,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:05,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96809838] [2024-06-27 19:33:05,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96809838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:05,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:05,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416539087] [2024-06-27 19:33:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:05,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:05,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:05,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:05,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:05,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:05,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 246 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:05,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:05,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:05,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:05,972 INFO L124 PetriNetUnfolderBase]: 2072/3529 cut-off events. [2024-06-27 19:33:05,972 INFO L125 PetriNetUnfolderBase]: For 173596/173596 co-relation queries the response was YES. [2024-06-27 19:33:05,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25626 conditions, 3529 events. 2072/3529 cut-off events. For 173596/173596 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21760 event pairs, 424 based on Foata normal form. 18/3545 useless extension candidates. Maximal degree in co-relation 25549. Up to 2797 conditions per place. [2024-06-27 19:33:06,002 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 30 changer transitions 0/294 dead transitions. [2024-06-27 19:33:06,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 294 transitions, 4056 flow [2024-06-27 19:33:06,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 19:33:06,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-27 19:33:06,003 INFO L175 Difference]: Start difference. First operand has 168 places, 246 transitions, 2966 flow. Second operand 9 states and 237 transitions. [2024-06-27 19:33:06,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 294 transitions, 4056 flow [2024-06-27 19:33:06,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 294 transitions, 3947 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:06,192 INFO L231 Difference]: Finished difference. Result has 172 places, 250 transitions, 3096 flow [2024-06-27 19:33:06,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3096, PETRI_PLACES=172, PETRI_TRANSITIONS=250} [2024-06-27 19:33:06,193 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-27 19:33:06,193 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 250 transitions, 3096 flow [2024-06-27 19:33:06,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:06,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:06,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:06,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:33:06,195 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)] === [2024-06-27 19:33:06,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:06,195 INFO L85 PathProgramCache]: Analyzing trace with hash 652897752, now seen corresponding path program 3 times [2024-06-27 19:33:06,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:06,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884108002] [2024-06-27 19:33:06,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:06,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:06,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:06,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:06,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884108002] [2024-06-27 19:33:06,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884108002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:06,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:06,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:06,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585704425] [2024-06-27 19:33:06,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:06,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:06,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:06,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:06,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:06,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:06,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 250 transitions, 3096 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:06,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:06,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:06,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:06,793 INFO L124 PetriNetUnfolderBase]: 2026/3459 cut-off events. [2024-06-27 19:33:06,793 INFO L125 PetriNetUnfolderBase]: For 166748/166748 co-relation queries the response was YES. [2024-06-27 19:33:06,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 3459 events. 2026/3459 cut-off events. For 166748/166748 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21306 event pairs, 421 based on Foata normal form. 24/3481 useless extension candidates. Maximal degree in co-relation 23922. Up to 2898 conditions per place. [2024-06-27 19:33:06,823 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-27 19:33:06,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 289 transitions, 3852 flow [2024-06-27 19:33:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:33:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:33:06,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 19:33:06,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-27 19:33:06,824 INFO L175 Difference]: Start difference. First operand has 172 places, 250 transitions, 3096 flow. Second operand 9 states and 232 transitions. [2024-06-27 19:33:06,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 289 transitions, 3852 flow [2024-06-27 19:33:07,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 289 transitions, 3698 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:07,035 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 3002 flow [2024-06-27 19:33:07,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3002, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-27 19:33:07,035 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 19:33:07,035 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 3002 flow [2024-06-27 19:33:07,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:07,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:07,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:33:07,036 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)] === [2024-06-27 19:33:07,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash 39338618, now seen corresponding path program 4 times [2024-06-27 19:33:07,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:07,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139934363] [2024-06-27 19:33:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:07,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:07,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:07,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:07,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139934363] [2024-06-27 19:33:07,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139934363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:07,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:07,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:07,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643844694] [2024-06-27 19:33:07,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:07,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:07,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:07,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:07,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:07,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:07,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 3002 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:07,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:07,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:07,640 INFO L124 PetriNetUnfolderBase]: 2188/3721 cut-off events. [2024-06-27 19:33:07,640 INFO L125 PetriNetUnfolderBase]: For 201393/201393 co-relation queries the response was YES. [2024-06-27 19:33:07,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24929 conditions, 3721 events. 2188/3721 cut-off events. For 201393/201393 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23156 event pairs, 472 based on Foata normal form. 50/3756 useless extension candidates. Maximal degree in co-relation 24848. Up to 2553 conditions per place. [2024-06-27 19:33:07,675 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 124 changer transitions 3/291 dead transitions. [2024-06-27 19:33:07,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 291 transitions, 4028 flow [2024-06-27 19:33:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:07,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:07,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 19:33:07,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-27 19:33:07,677 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 3002 flow. Second operand 8 states and 229 transitions. [2024-06-27 19:33:07,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 291 transitions, 4028 flow [2024-06-27 19:33:07,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 291 transitions, 3968 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:07,921 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3279 flow [2024-06-27 19:33:07,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3279, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-27 19:33:07,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 19:33:07,921 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3279 flow [2024-06-27 19:33:07,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:07,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:07,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:07,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:33:07,922 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)] === [2024-06-27 19:33:07,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1727387422, now seen corresponding path program 5 times [2024-06-27 19:33:07,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:07,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587114454] [2024-06-27 19:33:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:07,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:07,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:07,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587114454] [2024-06-27 19:33:07,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587114454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:07,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:07,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:07,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670060111] [2024-06-27 19:33:07,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:07,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:07,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:07,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:08,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:08,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3279 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:08,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:08,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:08,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:08,648 INFO L124 PetriNetUnfolderBase]: 2566/4373 cut-off events. [2024-06-27 19:33:08,648 INFO L125 PetriNetUnfolderBase]: For 264593/264593 co-relation queries the response was YES. [2024-06-27 19:33:08,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31152 conditions, 4373 events. 2566/4373 cut-off events. For 264593/264593 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27960 event pairs, 585 based on Foata normal form. 42/4400 useless extension candidates. Maximal degree in co-relation 31070. Up to 2519 conditions per place. [2024-06-27 19:33:08,686 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 129 changer transitions 4/302 dead transitions. [2024-06-27 19:33:08,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 302 transitions, 4619 flow [2024-06-27 19:33:08,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:08,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-27 19:33:08,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2024-06-27 19:33:08,691 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3279 flow. Second operand 8 states and 235 transitions. [2024-06-27 19:33:08,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 302 transitions, 4619 flow [2024-06-27 19:33:09,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 302 transitions, 4307 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:09,054 INFO L231 Difference]: Finished difference. Result has 178 places, 254 transitions, 3405 flow [2024-06-27 19:33:09,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3405, PETRI_PLACES=178, PETRI_TRANSITIONS=254} [2024-06-27 19:33:09,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 19:33:09,055 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 254 transitions, 3405 flow [2024-06-27 19:33:09,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:09,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:09,056 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:09,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:33:09,056 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)] === [2024-06-27 19:33:09,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:09,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2129759308, now seen corresponding path program 6 times [2024-06-27 19:33:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:09,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319033518] [2024-06-27 19:33:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:09,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:09,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:09,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319033518] [2024-06-27 19:33:09,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319033518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:09,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:09,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:09,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766700723] [2024-06-27 19:33:09,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:09,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:09,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:09,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:09,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:09,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:09,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 254 transitions, 3405 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:09,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:09,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:09,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:09,783 INFO L124 PetriNetUnfolderBase]: 2439/4170 cut-off events. [2024-06-27 19:33:09,783 INFO L125 PetriNetUnfolderBase]: For 229539/229539 co-relation queries the response was YES. [2024-06-27 19:33:09,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27855 conditions, 4170 events. 2439/4170 cut-off events. For 229539/229539 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26593 event pairs, 595 based on Foata normal form. 50/4205 useless extension candidates. Maximal degree in co-relation 27772. Up to 2982 conditions per place. [2024-06-27 19:33:09,817 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 124 changer transitions 3/294 dead transitions. [2024-06-27 19:33:09,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 294 transitions, 4455 flow [2024-06-27 19:33:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:09,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 19:33:09,826 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-27 19:33:09,826 INFO L175 Difference]: Start difference. First operand has 178 places, 254 transitions, 3405 flow. Second operand 8 states and 229 transitions. [2024-06-27 19:33:09,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 294 transitions, 4455 flow [2024-06-27 19:33:10,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 4071 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:10,090 INFO L231 Difference]: Finished difference. Result has 181 places, 253 transitions, 3269 flow [2024-06-27 19:33:10,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3269, PETRI_PLACES=181, PETRI_TRANSITIONS=253} [2024-06-27 19:33:10,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-27 19:33:10,090 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 253 transitions, 3269 flow [2024-06-27 19:33:10,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:10,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:10,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:10,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:33:10,091 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)] === [2024-06-27 19:33:10,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1975539020, now seen corresponding path program 1 times [2024-06-27 19:33:10,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:10,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121194955] [2024-06-27 19:33:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:10,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:10,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:10,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:10,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:10,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121194955] [2024-06-27 19:33:10,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121194955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:10,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:10,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:10,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445114167] [2024-06-27 19:33:10,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:10,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:10,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:10,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:10,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:10,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:10,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 253 transitions, 3269 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:10,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:10,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:10,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:10,864 INFO L124 PetriNetUnfolderBase]: 2731/4667 cut-off events. [2024-06-27 19:33:10,864 INFO L125 PetriNetUnfolderBase]: For 265050/265050 co-relation queries the response was YES. [2024-06-27 19:33:10,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 4667 events. 2731/4667 cut-off events. For 265050/265050 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30395 event pairs, 627 based on Foata normal form. 42/4691 useless extension candidates. Maximal degree in co-relation 31038. Up to 2561 conditions per place. [2024-06-27 19:33:10,905 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 132 changer transitions 4/303 dead transitions. [2024-06-27 19:33:10,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 4605 flow [2024-06-27 19:33:10,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:10,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-27 19:33:10,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-27 19:33:10,912 INFO L175 Difference]: Start difference. First operand has 181 places, 253 transitions, 3269 flow. Second operand 8 states and 234 transitions. [2024-06-27 19:33:10,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 4605 flow [2024-06-27 19:33:11,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 303 transitions, 4299 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:11,305 INFO L231 Difference]: Finished difference. Result has 182 places, 255 transitions, 3358 flow [2024-06-27 19:33:11,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3358, PETRI_PLACES=182, PETRI_TRANSITIONS=255} [2024-06-27 19:33:11,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 19:33:11,305 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 255 transitions, 3358 flow [2024-06-27 19:33:11,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:11,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:11,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:11,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:33:11,306 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)] === [2024-06-27 19:33:11,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:11,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1570618147, now seen corresponding path program 1 times [2024-06-27 19:33:11,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:11,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958346745] [2024-06-27 19:33:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:11,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:11,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:11,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:11,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:11,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958346745] [2024-06-27 19:33:11,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958346745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:11,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:11,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:11,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375162124] [2024-06-27 19:33:11,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:11,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:11,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:11,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:11,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:11,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:11,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 255 transitions, 3358 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:11,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:11,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:11,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:11,990 INFO L124 PetriNetUnfolderBase]: 2719/4646 cut-off events. [2024-06-27 19:33:11,990 INFO L125 PetriNetUnfolderBase]: For 230863/230863 co-relation queries the response was YES. [2024-06-27 19:33:12,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30809 conditions, 4646 events. 2719/4646 cut-off events. For 230863/230863 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30288 event pairs, 748 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30724. Up to 4084 conditions per place. [2024-06-27 19:33:12,033 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 55 changer transitions 0/276 dead transitions. [2024-06-27 19:33:12,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 276 transitions, 4119 flow [2024-06-27 19:33:12,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:12,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:33:12,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 19:33:12,043 INFO L175 Difference]: Start difference. First operand has 182 places, 255 transitions, 3358 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:33:12,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 276 transitions, 4119 flow [2024-06-27 19:33:12,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 276 transitions, 3859 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:12,401 INFO L231 Difference]: Finished difference. Result has 185 places, 262 transitions, 3367 flow [2024-06-27 19:33:12,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3367, PETRI_PLACES=185, PETRI_TRANSITIONS=262} [2024-06-27 19:33:12,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 19:33:12,401 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 262 transitions, 3367 flow [2024-06-27 19:33:12,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:12,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:33:12,402 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)] === [2024-06-27 19:33:12,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash -865336095, now seen corresponding path program 2 times [2024-06-27 19:33:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054896325] [2024-06-27 19:33:12,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:12,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:12,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054896325] [2024-06-27 19:33:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054896325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:12,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:12,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:12,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244172851] [2024-06-27 19:33:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:12,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:12,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 262 transitions, 3367 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:12,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:12,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:12,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:13,051 INFO L124 PetriNetUnfolderBase]: 2737/4654 cut-off events. [2024-06-27 19:33:13,052 INFO L125 PetriNetUnfolderBase]: For 233643/233643 co-relation queries the response was YES. [2024-06-27 19:33:13,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30909 conditions, 4654 events. 2737/4654 cut-off events. For 233643/233643 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30240 event pairs, 788 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30821. Up to 4004 conditions per place. [2024-06-27 19:33:13,095 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 78 changer transitions 0/282 dead transitions. [2024-06-27 19:33:13,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 282 transitions, 4342 flow [2024-06-27 19:33:13,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:33:13,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 19:33:13,096 INFO L175 Difference]: Start difference. First operand has 185 places, 262 transitions, 3367 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:33:13,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 282 transitions, 4342 flow [2024-06-27 19:33:13,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 282 transitions, 4244 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:13,543 INFO L231 Difference]: Finished difference. Result has 187 places, 269 transitions, 3550 flow [2024-06-27 19:33:13,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3550, PETRI_PLACES=187, PETRI_TRANSITIONS=269} [2024-06-27 19:33:13,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 19:33:13,543 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 269 transitions, 3550 flow [2024-06-27 19:33:13,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:13,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:13,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:13,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:33:13,544 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)] === [2024-06-27 19:33:13,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:13,544 INFO L85 PathProgramCache]: Analyzing trace with hash -864920385, now seen corresponding path program 3 times [2024-06-27 19:33:13,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:13,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111947788] [2024-06-27 19:33:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:13,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:13,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:13,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:13,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:13,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111947788] [2024-06-27 19:33:13,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111947788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:13,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:13,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:13,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744371263] [2024-06-27 19:33:13,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:13,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:13,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:13,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:13,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:13,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 269 transitions, 3550 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:13,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:13,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:13,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:14,176 INFO L124 PetriNetUnfolderBase]: 2731/4647 cut-off events. [2024-06-27 19:33:14,177 INFO L125 PetriNetUnfolderBase]: For 232301/232301 co-relation queries the response was YES. [2024-06-27 19:33:14,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30852 conditions, 4647 events. 2731/4647 cut-off events. For 232301/232301 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30188 event pairs, 787 based on Foata normal form. 2/4635 useless extension candidates. Maximal degree in co-relation 30764. Up to 3999 conditions per place. [2024-06-27 19:33:14,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-27 19:33:14,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 282 transitions, 4414 flow [2024-06-27 19:33:14,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:14,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 19:33:14,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-27 19:33:14,289 INFO L175 Difference]: Start difference. First operand has 187 places, 269 transitions, 3550 flow. Second operand 6 states and 158 transitions. [2024-06-27 19:33:14,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 282 transitions, 4414 flow [2024-06-27 19:33:14,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 282 transitions, 4256 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:14,655 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 3563 flow [2024-06-27 19:33:14,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3563, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2024-06-27 19:33:14,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 19:33:14,656 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 3563 flow [2024-06-27 19:33:14,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:14,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:14,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:33:14,656 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:14,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:14,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1115459146, now seen corresponding path program 7 times [2024-06-27 19:33:14,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:14,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576006008] [2024-06-27 19:33:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:14,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:14,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576006008] [2024-06-27 19:33:14,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576006008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:14,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:14,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914727361] [2024-06-27 19:33:14,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:14,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:14,761 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:14,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 3563 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:14,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:14,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:14,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:15,374 INFO L124 PetriNetUnfolderBase]: 2893/4948 cut-off events. [2024-06-27 19:33:15,374 INFO L125 PetriNetUnfolderBase]: For 301331/301331 co-relation queries the response was YES. [2024-06-27 19:33:15,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32560 conditions, 4948 events. 2893/4948 cut-off events. For 301331/301331 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32664 event pairs, 831 based on Foata normal form. 50/4992 useless extension candidates. Maximal degree in co-relation 32471. Up to 3710 conditions per place. [2024-06-27 19:33:15,420 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 175 selfloop transitions, 119 changer transitions 3/306 dead transitions. [2024-06-27 19:33:15,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 306 transitions, 4551 flow [2024-06-27 19:33:15,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:15,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-27 19:33:15,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2024-06-27 19:33:15,421 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 3563 flow. Second operand 8 states and 225 transitions. [2024-06-27 19:33:15,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 306 transitions, 4551 flow [2024-06-27 19:33:15,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 306 transitions, 4348 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:15,778 INFO L231 Difference]: Finished difference. Result has 194 places, 270 transitions, 3695 flow [2024-06-27 19:33:15,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3695, PETRI_PLACES=194, PETRI_TRANSITIONS=270} [2024-06-27 19:33:15,779 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-27 19:33:15,779 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 270 transitions, 3695 flow [2024-06-27 19:33:15,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:15,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:15,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:15,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:33:15,779 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:15,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:15,780 INFO L85 PathProgramCache]: Analyzing trace with hash -572863016, now seen corresponding path program 8 times [2024-06-27 19:33:15,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:15,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045161157] [2024-06-27 19:33:15,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:15,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:15,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:15,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:15,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045161157] [2024-06-27 19:33:15,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045161157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:15,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:15,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:15,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397432159] [2024-06-27 19:33:15,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:15,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:15,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:15,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:15,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:15,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:15,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 270 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:15,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:15,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:15,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:16,591 INFO L124 PetriNetUnfolderBase]: 3045/5214 cut-off events. [2024-06-27 19:33:16,592 INFO L125 PetriNetUnfolderBase]: For 323828/323828 co-relation queries the response was YES. [2024-06-27 19:33:16,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34550 conditions, 5214 events. 3045/5214 cut-off events. For 323828/323828 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34734 event pairs, 886 based on Foata normal form. 50/5258 useless extension candidates. Maximal degree in co-relation 34460. Up to 3966 conditions per place. [2024-06-27 19:33:16,641 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 119 changer transitions 3/307 dead transitions. [2024-06-27 19:33:16,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 307 transitions, 4693 flow [2024-06-27 19:33:16,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:16,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:16,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 19:33:16,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:33:16,642 INFO L175 Difference]: Start difference. First operand has 194 places, 270 transitions, 3695 flow. Second operand 8 states and 224 transitions. [2024-06-27 19:33:16,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 307 transitions, 4693 flow [2024-06-27 19:33:17,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 307 transitions, 4381 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:17,085 INFO L231 Difference]: Finished difference. Result has 196 places, 271 transitions, 3722 flow [2024-06-27 19:33:17,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3722, PETRI_PLACES=196, PETRI_TRANSITIONS=271} [2024-06-27 19:33:17,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 19:33:17,086 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 271 transitions, 3722 flow [2024-06-27 19:33:17,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:17,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:17,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:17,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:33:17,087 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:17,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:17,087 INFO L85 PathProgramCache]: Analyzing trace with hash 771486218, now seen corresponding path program 9 times [2024-06-27 19:33:17,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:17,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564894493] [2024-06-27 19:33:17,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:17,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:17,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:17,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:17,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564894493] [2024-06-27 19:33:17,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564894493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:17,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652344504] [2024-06-27 19:33:17,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:17,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:17,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:17,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:17,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:17,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:17,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 271 transitions, 3722 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:17,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:17,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:17,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:18,052 INFO L124 PetriNetUnfolderBase]: 3398/5817 cut-off events. [2024-06-27 19:33:18,052 INFO L125 PetriNetUnfolderBase]: For 391484/391484 co-relation queries the response was YES. [2024-06-27 19:33:18,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39756 conditions, 5817 events. 3398/5817 cut-off events. For 391484/391484 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 39515 event pairs, 971 based on Foata normal form. 42/5853 useless extension candidates. Maximal degree in co-relation 39665. Up to 3646 conditions per place. [2024-06-27 19:33:18,114 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 126 changer transitions 4/318 dead transitions. [2024-06-27 19:33:18,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 318 transitions, 5064 flow [2024-06-27 19:33:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-27 19:33:18,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-27 19:33:18,115 INFO L175 Difference]: Start difference. First operand has 196 places, 271 transitions, 3722 flow. Second operand 8 states and 230 transitions. [2024-06-27 19:33:18,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 318 transitions, 5064 flow [2024-06-27 19:33:18,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 318 transitions, 4748 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:18,803 INFO L231 Difference]: Finished difference. Result has 198 places, 274 transitions, 3861 flow [2024-06-27 19:33:18,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3861, PETRI_PLACES=198, PETRI_TRANSITIONS=274} [2024-06-27 19:33:18,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 19:33:18,803 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 274 transitions, 3861 flow [2024-06-27 19:33:18,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:18,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:18,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:18,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:33:18,804 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:18,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488182, now seen corresponding path program 10 times [2024-06-27 19:33:18,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:18,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370932764] [2024-06-27 19:33:18,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:18,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:18,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370932764] [2024-06-27 19:33:18,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370932764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:18,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:18,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079252530] [2024-06-27 19:33:18,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:18,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:18,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:18,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:18,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:18,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 274 transitions, 3861 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:18,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:18,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:18,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:19,699 INFO L124 PetriNetUnfolderBase]: 3296/5663 cut-off events. [2024-06-27 19:33:19,699 INFO L125 PetriNetUnfolderBase]: For 343944/343944 co-relation queries the response was YES. [2024-06-27 19:33:19,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36245 conditions, 5663 events. 3296/5663 cut-off events. For 343944/343944 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38404 event pairs, 1008 based on Foata normal form. 50/5707 useless extension candidates. Maximal degree in co-relation 36153. Up to 4353 conditions per place. [2024-06-27 19:33:19,758 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 118 changer transitions 0/310 dead transitions. [2024-06-27 19:33:19,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 310 transitions, 4881 flow [2024-06-27 19:33:19,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:19,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:19,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-27 19:33:19,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-27 19:33:19,759 INFO L175 Difference]: Start difference. First operand has 198 places, 274 transitions, 3861 flow. Second operand 8 states and 224 transitions. [2024-06-27 19:33:19,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 310 transitions, 4881 flow [2024-06-27 19:33:20,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 310 transitions, 4558 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:20,423 INFO L231 Difference]: Finished difference. Result has 202 places, 274 transitions, 3783 flow [2024-06-27 19:33:20,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3783, PETRI_PLACES=202, PETRI_TRANSITIONS=274} [2024-06-27 19:33:20,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 19:33:20,423 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 274 transitions, 3783 flow [2024-06-27 19:33:20,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:20,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:20,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:33:20,424 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:20,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:20,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1398852310, now seen corresponding path program 2 times [2024-06-27 19:33:20,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:20,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086703432] [2024-06-27 19:33:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:20,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:20,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:20,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:20,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086703432] [2024-06-27 19:33:20,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086703432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:20,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:20,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:20,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159029999] [2024-06-27 19:33:20,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:20,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:20,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:20,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:20,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:20,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:20,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 274 transitions, 3783 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:20,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:20,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:20,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:21,320 INFO L124 PetriNetUnfolderBase]: 3425/5912 cut-off events. [2024-06-27 19:33:21,320 INFO L125 PetriNetUnfolderBase]: For 336010/336010 co-relation queries the response was YES. [2024-06-27 19:33:21,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37028 conditions, 5912 events. 3425/5912 cut-off events. For 336010/336010 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40704 event pairs, 1010 based on Foata normal form. 42/5948 useless extension candidates. Maximal degree in co-relation 36934. Up to 4115 conditions per place. [2024-06-27 19:33:21,380 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 122 changer transitions 6/317 dead transitions. [2024-06-27 19:33:21,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 317 transitions, 4853 flow [2024-06-27 19:33:21,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:21,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:21,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 19:33:21,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-27 19:33:21,381 INFO L175 Difference]: Start difference. First operand has 202 places, 274 transitions, 3783 flow. Second operand 8 states and 229 transitions. [2024-06-27 19:33:21,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 317 transitions, 4853 flow [2024-06-27 19:33:21,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 317 transitions, 4593 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:21,979 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3867 flow [2024-06-27 19:33:21,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3867, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-27 19:33:21,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-27 19:33:21,980 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3867 flow [2024-06-27 19:33:21,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:21,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:21,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:21,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:33:21,980 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:21,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:21,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1644242228, now seen corresponding path program 3 times [2024-06-27 19:33:21,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:21,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606238098] [2024-06-27 19:33:21,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:21,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:21,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:22,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:22,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:22,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606238098] [2024-06-27 19:33:22,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606238098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:22,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:22,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:22,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325332935] [2024-06-27 19:33:22,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:22,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:22,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:22,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3867 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:22,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:22,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:22,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:22,959 INFO L124 PetriNetUnfolderBase]: 3546/6157 cut-off events. [2024-06-27 19:33:22,959 INFO L125 PetriNetUnfolderBase]: For 356309/356309 co-relation queries the response was YES. [2024-06-27 19:33:22,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38454 conditions, 6157 events. 3546/6157 cut-off events. For 356309/356309 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42874 event pairs, 1071 based on Foata normal form. 42/6193 useless extension candidates. Maximal degree in co-relation 38359. Up to 4444 conditions per place. [2024-06-27 19:33:23,007 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 189 selfloop transitions, 121 changer transitions 0/319 dead transitions. [2024-06-27 19:33:23,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 319 transitions, 5059 flow [2024-06-27 19:33:23,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:23,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:23,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-27 19:33:23,008 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-27 19:33:23,008 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3867 flow. Second operand 8 states and 229 transitions. [2024-06-27 19:33:23,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 319 transitions, 5059 flow [2024-06-27 19:33:23,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 319 transitions, 4724 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:23,612 INFO L231 Difference]: Finished difference. Result has 205 places, 277 transitions, 3895 flow [2024-06-27 19:33:23,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3895, PETRI_PLACES=205, PETRI_TRANSITIONS=277} [2024-06-27 19:33:23,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-27 19:33:23,613 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 277 transitions, 3895 flow [2024-06-27 19:33:23,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:23,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:23,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:33:23,614 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:33:23,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:23,614 INFO L85 PathProgramCache]: Analyzing trace with hash -158870230, now seen corresponding path program 4 times [2024-06-27 19:33:23,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:23,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771906997] [2024-06-27 19:33:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:23,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:23,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:23,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:23,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771906997] [2024-06-27 19:33:23,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771906997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:23,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:23,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:33:23,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620875912] [2024-06-27 19:33:23,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:23,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:33:23,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:33:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:33:23,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:23,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 277 transitions, 3895 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:23,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:23,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:23,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:24,542 INFO L124 PetriNetUnfolderBase]: 3763/6553 cut-off events. [2024-06-27 19:33:24,542 INFO L125 PetriNetUnfolderBase]: For 391983/391983 co-relation queries the response was YES. [2024-06-27 19:33:24,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40338 conditions, 6553 events. 3763/6553 cut-off events. For 391983/391983 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46455 event pairs, 1104 based on Foata normal form. 42/6589 useless extension candidates. Maximal degree in co-relation 40242. Up to 3049 conditions per place. [2024-06-27 19:33:24,608 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 130 changer transitions 0/324 dead transitions. [2024-06-27 19:33:24,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 324 transitions, 5091 flow [2024-06-27 19:33:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:24,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:24,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-27 19:33:24,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-27 19:33:24,609 INFO L175 Difference]: Start difference. First operand has 205 places, 277 transitions, 3895 flow. Second operand 8 states and 231 transitions. [2024-06-27 19:33:24,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 324 transitions, 5091 flow [2024-06-27 19:33:25,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 324 transitions, 4758 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:25,272 INFO L231 Difference]: Finished difference. Result has 206 places, 277 transitions, 3793 flow [2024-06-27 19:33:25,272 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=206, PETRI_TRANSITIONS=277} [2024-06-27 19:33:25,272 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 19:33:25,272 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 277 transitions, 3793 flow [2024-06-27 19:33:25,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:25,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:25,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:33:25,273 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)] === [2024-06-27 19:33:25,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash 2099085123, now seen corresponding path program 1 times [2024-06-27 19:33:25,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:25,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084360699] [2024-06-27 19:33:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:25,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:25,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:25,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:25,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084360699] [2024-06-27 19:33:25,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084360699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:25,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:25,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:25,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938981332] [2024-06-27 19:33:25,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:25,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:25,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:25,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:25,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:25,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 277 transitions, 3793 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:25,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:25,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:25,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:26,119 INFO L124 PetriNetUnfolderBase]: 3779/6571 cut-off events. [2024-06-27 19:33:26,119 INFO L125 PetriNetUnfolderBase]: For 341834/341834 co-relation queries the response was YES. [2024-06-27 19:33:26,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40366 conditions, 6571 events. 3779/6571 cut-off events. For 341834/341834 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46625 event pairs, 1308 based on Foata normal form. 4/6566 useless extension candidates. Maximal degree in co-relation 40269. Up to 5930 conditions per place. [2024-06-27 19:33:26,183 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-27 19:33:26,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 291 transitions, 4431 flow [2024-06-27 19:33:26,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:26,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:26,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:33:26,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-27 19:33:26,184 INFO L175 Difference]: Start difference. First operand has 206 places, 277 transitions, 3793 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:33:26,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 291 transitions, 4431 flow [2024-06-27 19:33:26,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 291 transitions, 4076 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 19:33:26,730 INFO L231 Difference]: Finished difference. Result has 206 places, 280 transitions, 3576 flow [2024-06-27 19:33:26,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3576, PETRI_PLACES=206, PETRI_TRANSITIONS=280} [2024-06-27 19:33:26,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-27 19:33:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 280 transitions, 3576 flow [2024-06-27 19:33:26,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:26,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:26,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:33:26,732 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)] === [2024-06-27 19:33:26,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash 616383391, now seen corresponding path program 2 times [2024-06-27 19:33:26,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:26,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369465746] [2024-06-27 19:33:26,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:26,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:26,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:26,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:26,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:26,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369465746] [2024-06-27 19:33:26,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369465746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:26,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:26,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:26,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931993541] [2024-06-27 19:33:26,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:26,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:26,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:26,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:26,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:26,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:26,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 280 transitions, 3576 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:26,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:26,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:26,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:27,602 INFO L124 PetriNetUnfolderBase]: 3655/6361 cut-off events. [2024-06-27 19:33:27,602 INFO L125 PetriNetUnfolderBase]: For 295688/295688 co-relation queries the response was YES. [2024-06-27 19:33:27,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37323 conditions, 6361 events. 3655/6361 cut-off events. For 295688/295688 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 44811 event pairs, 1215 based on Foata normal form. 4/6356 useless extension candidates. Maximal degree in co-relation 37225. Up to 5690 conditions per place. [2024-06-27 19:33:27,651 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 43 changer transitions 0/295 dead transitions. [2024-06-27 19:33:27,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 295 transitions, 4230 flow [2024-06-27 19:33:27,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:27,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:33:27,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-27 19:33:27,652 INFO L175 Difference]: Start difference. First operand has 206 places, 280 transitions, 3576 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:33:27,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 295 transitions, 4230 flow [2024-06-27 19:33:28,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 4114 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:28,289 INFO L231 Difference]: Finished difference. Result has 208 places, 283 transitions, 3612 flow [2024-06-27 19:33:28,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3612, PETRI_PLACES=208, PETRI_TRANSITIONS=283} [2024-06-27 19:33:28,289 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-27 19:33:28,289 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 283 transitions, 3612 flow [2024-06-27 19:33:28,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:28,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:28,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:28,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:33:28,290 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)] === [2024-06-27 19:33:28,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1127082749, now seen corresponding path program 1 times [2024-06-27 19:33:28,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:28,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748324294] [2024-06-27 19:33:28,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:28,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:28,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:28,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:28,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748324294] [2024-06-27 19:33:28,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748324294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:28,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:28,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:28,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994497852] [2024-06-27 19:33:28,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:28,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:28,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:28,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:28,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 283 transitions, 3612 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:28,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:28,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:28,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:29,150 INFO L124 PetriNetUnfolderBase]: 3683/6422 cut-off events. [2024-06-27 19:33:29,150 INFO L125 PetriNetUnfolderBase]: For 304908/304908 co-relation queries the response was YES. [2024-06-27 19:33:29,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37957 conditions, 6422 events. 3683/6422 cut-off events. For 304908/304908 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45217 event pairs, 1206 based on Foata normal form. 2/6420 useless extension candidates. Maximal degree in co-relation 37858. Up to 5648 conditions per place. [2024-06-27 19:33:29,215 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-27 19:33:29,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 311 transitions, 4719 flow [2024-06-27 19:33:29,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:29,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:29,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:33:29,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-27 19:33:29,217 INFO L175 Difference]: Start difference. First operand has 208 places, 283 transitions, 3612 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:33:29,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 311 transitions, 4719 flow [2024-06-27 19:33:29,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 311 transitions, 4589 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:29,812 INFO L231 Difference]: Finished difference. Result has 212 places, 291 transitions, 3734 flow [2024-06-27 19:33:29,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3734, PETRI_PLACES=212, PETRI_TRANSITIONS=291} [2024-06-27 19:33:29,813 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-27 19:33:29,813 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 291 transitions, 3734 flow [2024-06-27 19:33:29,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:29,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:29,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:29,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:33:29,814 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)] === [2024-06-27 19:33:29,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:29,814 INFO L85 PathProgramCache]: Analyzing trace with hash -933213391, now seen corresponding path program 2 times [2024-06-27 19:33:29,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:29,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070020951] [2024-06-27 19:33:29,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:29,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:29,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:29,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070020951] [2024-06-27 19:33:29,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070020951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:29,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495971775] [2024-06-27 19:33:29,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:29,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:29,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:29,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:29,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:29,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 291 transitions, 3734 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:29,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:29,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:29,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:30,640 INFO L124 PetriNetUnfolderBase]: 3693/6414 cut-off events. [2024-06-27 19:33:30,640 INFO L125 PetriNetUnfolderBase]: For 315485/315485 co-relation queries the response was YES. [2024-06-27 19:33:30,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38241 conditions, 6414 events. 3693/6414 cut-off events. For 315485/315485 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45099 event pairs, 1235 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 38140. Up to 5658 conditions per place. [2024-06-27 19:33:30,704 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 68 changer transitions 0/308 dead transitions. [2024-06-27 19:33:30,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 308 transitions, 4782 flow [2024-06-27 19:33:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:33:30,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 19:33:30,705 INFO L175 Difference]: Start difference. First operand has 212 places, 291 transitions, 3734 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:33:30,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 308 transitions, 4782 flow [2024-06-27 19:33:31,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 308 transitions, 4667 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:31,347 INFO L231 Difference]: Finished difference. Result has 215 places, 295 transitions, 3828 flow [2024-06-27 19:33:31,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3828, PETRI_PLACES=215, PETRI_TRANSITIONS=295} [2024-06-27 19:33:31,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 19:33:31,348 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 295 transitions, 3828 flow [2024-06-27 19:33:31,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:31,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:31,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:33:31,348 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)] === [2024-06-27 19:33:31,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:31,349 INFO L85 PathProgramCache]: Analyzing trace with hash -36159865, now seen corresponding path program 3 times [2024-06-27 19:33:31,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:31,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672743475] [2024-06-27 19:33:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:31,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:31,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:31,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672743475] [2024-06-27 19:33:31,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672743475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:31,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:31,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:31,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474765234] [2024-06-27 19:33:31,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:31,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:31,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:31,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:31,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:31,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:31,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 295 transitions, 3828 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:31,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:31,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:31,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:32,230 INFO L124 PetriNetUnfolderBase]: 3689/6410 cut-off events. [2024-06-27 19:33:32,231 INFO L125 PetriNetUnfolderBase]: For 321728/321728 co-relation queries the response was YES. [2024-06-27 19:33:32,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38221 conditions, 6410 events. 3689/6410 cut-off events. For 321728/321728 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45123 event pairs, 1235 based on Foata normal form. 2/6396 useless extension candidates. Maximal degree in co-relation 38118. Up to 5656 conditions per place. [2024-06-27 19:33:32,285 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 63 changer transitions 0/308 dead transitions. [2024-06-27 19:33:32,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 4816 flow [2024-06-27 19:33:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:33:32,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:33:32,286 INFO L175 Difference]: Start difference. First operand has 215 places, 295 transitions, 3828 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:33:32,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 4816 flow [2024-06-27 19:33:33,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 308 transitions, 4640 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:33,052 INFO L231 Difference]: Finished difference. Result has 217 places, 295 transitions, 3786 flow [2024-06-27 19:33:33,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=217, PETRI_TRANSITIONS=295} [2024-06-27 19:33:33,052 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-27 19:33:33,052 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 295 transitions, 3786 flow [2024-06-27 19:33:33,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:33,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:33,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:33,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:33:33,053 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)] === [2024-06-27 19:33:33,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:33,053 INFO L85 PathProgramCache]: Analyzing trace with hash 946483229, now seen corresponding path program 4 times [2024-06-27 19:33:33,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:33,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343508872] [2024-06-27 19:33:33,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:33,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:33,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:33,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:33,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:33,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343508872] [2024-06-27 19:33:33,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343508872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:33,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:33,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:33,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503936560] [2024-06-27 19:33:33,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:33,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:33,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:33,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:33,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:33,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:33,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 295 transitions, 3786 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:33,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:33,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:33,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:33,902 INFO L124 PetriNetUnfolderBase]: 3699/6450 cut-off events. [2024-06-27 19:33:33,904 INFO L125 PetriNetUnfolderBase]: For 330373/330373 co-relation queries the response was YES. [2024-06-27 19:33:33,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38425 conditions, 6450 events. 3699/6450 cut-off events. For 330373/330373 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45524 event pairs, 1215 based on Foata normal form. 2/6448 useless extension candidates. Maximal degree in co-relation 38323. Up to 5666 conditions per place. [2024-06-27 19:33:33,964 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 68 changer transitions 1/317 dead transitions. [2024-06-27 19:33:33,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 317 transitions, 4755 flow [2024-06-27 19:33:33,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:33,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:33,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-27 19:33:33,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-27 19:33:33,965 INFO L175 Difference]: Start difference. First operand has 217 places, 295 transitions, 3786 flow. Second operand 6 states and 161 transitions. [2024-06-27 19:33:33,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 317 transitions, 4755 flow [2024-06-27 19:33:34,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 317 transitions, 4542 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-27 19:33:34,555 INFO L231 Difference]: Finished difference. Result has 216 places, 298 transitions, 3768 flow [2024-06-27 19:33:34,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3768, PETRI_PLACES=216, PETRI_TRANSITIONS=298} [2024-06-27 19:33:34,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-27 19:33:34,555 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 298 transitions, 3768 flow [2024-06-27 19:33:34,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:34,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:34,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:34,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:33:34,556 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)] === [2024-06-27 19:33:34,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1741764323, now seen corresponding path program 5 times [2024-06-27 19:33:34,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:34,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277013258] [2024-06-27 19:33:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:34,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:34,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:34,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277013258] [2024-06-27 19:33:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277013258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:34,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:34,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:34,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50816472] [2024-06-27 19:33:34,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:34,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:34,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:34,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:34,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 298 transitions, 3768 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:34,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:34,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:34,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:35,513 INFO L124 PetriNetUnfolderBase]: 3707/6453 cut-off events. [2024-06-27 19:33:35,514 INFO L125 PetriNetUnfolderBase]: For 340385/340385 co-relation queries the response was YES. [2024-06-27 19:33:35,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38575 conditions, 6453 events. 3707/6453 cut-off events. For 340385/340385 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45567 event pairs, 1245 based on Foata normal form. 2/6442 useless extension candidates. Maximal degree in co-relation 38475. Up to 5676 conditions per place. [2024-06-27 19:33:35,580 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 72 changer transitions 1/314 dead transitions. [2024-06-27 19:33:35,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 314 transitions, 4721 flow [2024-06-27 19:33:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:35,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:33:35,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:33:35,582 INFO L175 Difference]: Start difference. First operand has 216 places, 298 transitions, 3768 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:33:35,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 314 transitions, 4721 flow [2024-06-27 19:33:36,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 314 transitions, 4611 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 19:33:36,293 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3856 flow [2024-06-27 19:33:36,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3856, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-27 19:33:36,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 19:33:36,294 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3856 flow [2024-06-27 19:33:36,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:36,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:36,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:36,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:33:36,295 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)] === [2024-06-27 19:33:36,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:36,295 INFO L85 PathProgramCache]: Analyzing trace with hash -285272941, now seen corresponding path program 6 times [2024-06-27 19:33:36,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:36,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416133484] [2024-06-27 19:33:36,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:36,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:36,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:36,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:36,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:36,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416133484] [2024-06-27 19:33:36,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416133484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:36,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:36,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:36,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810525510] [2024-06-27 19:33:36,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:36,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:36,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:36,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:36,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3856 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:36,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:36,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:36,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:37,193 INFO L124 PetriNetUnfolderBase]: 3638/6330 cut-off events. [2024-06-27 19:33:37,193 INFO L125 PetriNetUnfolderBase]: For 345416/345416 co-relation queries the response was YES. [2024-06-27 19:33:37,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38080 conditions, 6330 events. 3638/6330 cut-off events. For 345416/345416 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44431 event pairs, 1171 based on Foata normal form. 2/6328 useless extension candidates. Maximal degree in co-relation 37979. Up to 5550 conditions per place. [2024-06-27 19:33:37,268 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 70 changer transitions 3/315 dead transitions. [2024-06-27 19:33:37,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 315 transitions, 4628 flow [2024-06-27 19:33:37,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:37,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:37,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:33:37,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 19:33:37,269 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3856 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:33:37,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 315 transitions, 4628 flow [2024-06-27 19:33:37,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 315 transitions, 4470 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:37,869 INFO L231 Difference]: Finished difference. Result has 221 places, 298 transitions, 3803 flow [2024-06-27 19:33:37,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3803, PETRI_PLACES=221, PETRI_TRANSITIONS=298} [2024-06-27 19:33:37,870 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 19:33:37,870 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 298 transitions, 3803 flow [2024-06-27 19:33:37,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:37,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:37,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:37,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:33:37,871 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)] === [2024-06-27 19:33:37,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:37,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1741756387, now seen corresponding path program 1 times [2024-06-27 19:33:37,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:37,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975929405] [2024-06-27 19:33:37,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:37,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:37,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:37,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:37,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975929405] [2024-06-27 19:33:37,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975929405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:37,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:37,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687473592] [2024-06-27 19:33:37,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:37,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:37,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:37,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 298 transitions, 3803 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:37,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:37,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:37,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:38,693 INFO L124 PetriNetUnfolderBase]: 3470/6033 cut-off events. [2024-06-27 19:33:38,693 INFO L125 PetriNetUnfolderBase]: For 359298/359298 co-relation queries the response was YES. [2024-06-27 19:33:38,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37304 conditions, 6033 events. 3470/6033 cut-off events. For 359298/359298 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 41903 event pairs, 1086 based on Foata normal form. 4/6028 useless extension candidates. Maximal degree in co-relation 37203. Up to 5393 conditions per place. [2024-06-27 19:33:38,752 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 266 selfloop transitions, 37 changer transitions 0/312 dead transitions. [2024-06-27 19:33:38,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4491 flow [2024-06-27 19:33:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:38,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:33:38,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-27 19:33:38,753 INFO L175 Difference]: Start difference. First operand has 221 places, 298 transitions, 3803 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:33:38,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4491 flow [2024-06-27 19:33:39,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 312 transitions, 4209 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:39,505 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3663 flow [2024-06-27 19:33:39,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3663, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-27 19:33:39,505 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 19:33:39,505 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3663 flow [2024-06-27 19:33:39,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:39,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:39,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:33:39,506 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)] === [2024-06-27 19:33:39,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:39,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1998256897, now seen corresponding path program 2 times [2024-06-27 19:33:39,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:39,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712598900] [2024-06-27 19:33:39,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:39,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:39,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:39,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712598900] [2024-06-27 19:33:39,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712598900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:39,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:39,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:39,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854426205] [2024-06-27 19:33:39,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:39,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:39,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:39,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:39,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:39,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:39,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3663 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:39,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:39,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:39,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:40,305 INFO L124 PetriNetUnfolderBase]: 3486/6072 cut-off events. [2024-06-27 19:33:40,306 INFO L125 PetriNetUnfolderBase]: For 368078/368078 co-relation queries the response was YES. [2024-06-27 19:33:40,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 6072 events. 3486/6072 cut-off events. For 368078/368078 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42236 event pairs, 1077 based on Foata normal form. 4/6072 useless extension candidates. Maximal degree in co-relation 37355. Up to 5417 conditions per place. [2024-06-27 19:33:40,365 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 40 changer transitions 0/318 dead transitions. [2024-06-27 19:33:40,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 318 transitions, 4377 flow [2024-06-27 19:33:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:40,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:33:40,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:33:40,366 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3663 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:33:40,366 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 318 transitions, 4377 flow [2024-06-27 19:33:41,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 318 transitions, 4257 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:41,224 INFO L231 Difference]: Finished difference. Result has 221 places, 304 transitions, 3697 flow [2024-06-27 19:33:41,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3697, PETRI_PLACES=221, PETRI_TRANSITIONS=304} [2024-06-27 19:33:41,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 19:33:41,225 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 304 transitions, 3697 flow [2024-06-27 19:33:41,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:41,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:41,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:33:41,225 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)] === [2024-06-27 19:33:41,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1732233187, now seen corresponding path program 3 times [2024-06-27 19:33:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192884942] [2024-06-27 19:33:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:41,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:41,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192884942] [2024-06-27 19:33:41,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192884942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:41,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:41,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:41,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831120122] [2024-06-27 19:33:41,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:41,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:41,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:41,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:41,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:41,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:41,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 304 transitions, 3697 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:41,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:41,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:41,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:42,094 INFO L124 PetriNetUnfolderBase]: 3489/6074 cut-off events. [2024-06-27 19:33:42,095 INFO L125 PetriNetUnfolderBase]: For 375456/375456 co-relation queries the response was YES. [2024-06-27 19:33:42,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37542 conditions, 6074 events. 3489/6074 cut-off events. For 375456/375456 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42321 event pairs, 1081 based on Foata normal form. 4/6069 useless extension candidates. Maximal degree in co-relation 37439. Up to 5370 conditions per place. [2024-06-27 19:33:42,155 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 46 changer transitions 0/319 dead transitions. [2024-06-27 19:33:42,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 319 transitions, 4413 flow [2024-06-27 19:33:42,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:42,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:42,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-27 19:33:42,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 19:33:42,156 INFO L175 Difference]: Start difference. First operand has 221 places, 304 transitions, 3697 flow. Second operand 6 states and 150 transitions. [2024-06-27 19:33:42,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 319 transitions, 4413 flow [2024-06-27 19:33:42,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 319 transitions, 4281 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:42,989 INFO L231 Difference]: Finished difference. Result has 223 places, 307 transitions, 3737 flow [2024-06-27 19:33:42,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3737, PETRI_PLACES=223, PETRI_TRANSITIONS=307} [2024-06-27 19:33:42,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 19:33:42,990 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 307 transitions, 3737 flow [2024-06-27 19:33:42,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:42,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:42,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:42,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:33:42,990 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)] === [2024-06-27 19:33:42,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:42,990 INFO L85 PathProgramCache]: Analyzing trace with hash -567846408, now seen corresponding path program 1 times [2024-06-27 19:33:42,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:42,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270864821] [2024-06-27 19:33:42,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:42,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:42,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:43,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:43,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270864821] [2024-06-27 19:33:43,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270864821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:43,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:43,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:43,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809495407] [2024-06-27 19:33:43,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:43,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:43,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:43,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:43,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:43,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:43,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 307 transitions, 3737 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:43,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:43,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:43,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:43,844 INFO L124 PetriNetUnfolderBase]: 3494/6074 cut-off events. [2024-06-27 19:33:43,844 INFO L125 PetriNetUnfolderBase]: For 379167/379167 co-relation queries the response was YES. [2024-06-27 19:33:43,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37771 conditions, 6074 events. 3494/6074 cut-off events. For 379167/379167 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42062 event pairs, 1044 based on Foata normal form. 1/6061 useless extension candidates. Maximal degree in co-relation 37667. Up to 5291 conditions per place. [2024-06-27 19:33:43,903 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 85 changer transitions 0/336 dead transitions. [2024-06-27 19:33:43,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 4899 flow [2024-06-27 19:33:43,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:43,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:43,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:33:43,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:33:43,904 INFO L175 Difference]: Start difference. First operand has 223 places, 307 transitions, 3737 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:33:43,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 4899 flow [2024-06-27 19:33:44,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 336 transitions, 4749 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:44,517 INFO L231 Difference]: Finished difference. Result has 226 places, 310 transitions, 3805 flow [2024-06-27 19:33:44,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3805, PETRI_PLACES=226, PETRI_TRANSITIONS=310} [2024-06-27 19:33:44,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 19:33:44,517 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 310 transitions, 3805 flow [2024-06-27 19:33:44,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:44,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:44,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:44,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:33:44,518 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)] === [2024-06-27 19:33:44,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:44,518 INFO L85 PathProgramCache]: Analyzing trace with hash 986087862, now seen corresponding path program 2 times [2024-06-27 19:33:44,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:44,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248891832] [2024-06-27 19:33:44,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:44,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:44,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:44,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:44,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248891832] [2024-06-27 19:33:44,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248891832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:44,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:44,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:44,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598771821] [2024-06-27 19:33:44,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:44,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:44,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:44,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 310 transitions, 3805 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:44,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:44,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:44,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:45,397 INFO L124 PetriNetUnfolderBase]: 3499/6086 cut-off events. [2024-06-27 19:33:45,397 INFO L125 PetriNetUnfolderBase]: For 389010/389010 co-relation queries the response was YES. [2024-06-27 19:33:45,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6086 events. 3499/6086 cut-off events. For 389010/389010 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42163 event pairs, 1078 based on Foata normal form. 1/6074 useless extension candidates. Maximal degree in co-relation 37845. Up to 5295 conditions per place. [2024-06-27 19:33:45,456 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 88 changer transitions 0/333 dead transitions. [2024-06-27 19:33:45,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 333 transitions, 4951 flow [2024-06-27 19:33:45,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:45,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:45,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:33:45,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:33:45,457 INFO L175 Difference]: Start difference. First operand has 226 places, 310 transitions, 3805 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:33:45,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 333 transitions, 4951 flow [2024-06-27 19:33:46,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 333 transitions, 4805 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:46,146 INFO L231 Difference]: Finished difference. Result has 229 places, 313 transitions, 3883 flow [2024-06-27 19:33:46,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3665, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3883, PETRI_PLACES=229, PETRI_TRANSITIONS=313} [2024-06-27 19:33:46,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 19:33:46,147 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 313 transitions, 3883 flow [2024-06-27 19:33:46,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:46,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:46,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:46,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:33:46,147 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)] === [2024-06-27 19:33:46,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:46,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1415657962, now seen corresponding path program 1 times [2024-06-27 19:33:46,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:46,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618149372] [2024-06-27 19:33:46,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:46,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:46,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:46,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:46,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618149372] [2024-06-27 19:33:46,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618149372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:46,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:46,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:46,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388139951] [2024-06-27 19:33:46,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:46,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:46,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:46,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:46,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:46,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:46,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 313 transitions, 3883 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:46,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:46,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:46,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:47,056 INFO L124 PetriNetUnfolderBase]: 3515/6113 cut-off events. [2024-06-27 19:33:47,057 INFO L125 PetriNetUnfolderBase]: For 406769/406769 co-relation queries the response was YES. [2024-06-27 19:33:47,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6113 events. 3515/6113 cut-off events. For 406769/406769 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42308 event pairs, 948 based on Foata normal form. 4/6115 useless extension candidates. Maximal degree in co-relation 38133. Up to 5411 conditions per place. [2024-06-27 19:33:47,119 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 28 changer transitions 0/349 dead transitions. [2024-06-27 19:33:47,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 349 transitions, 4814 flow [2024-06-27 19:33:47,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:47,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:47,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:33:47,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-27 19:33:47,119 INFO L175 Difference]: Start difference. First operand has 229 places, 313 transitions, 3883 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:33:47,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 349 transitions, 4814 flow [2024-06-27 19:33:47,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 349 transitions, 4672 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:47,903 INFO L231 Difference]: Finished difference. Result has 233 places, 316 transitions, 3838 flow [2024-06-27 19:33:47,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3838, PETRI_PLACES=233, PETRI_TRANSITIONS=316} [2024-06-27 19:33:47,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 19:33:47,903 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 316 transitions, 3838 flow [2024-06-27 19:33:47,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:47,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:47,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:47,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:33:47,904 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)] === [2024-06-27 19:33:47,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:47,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1406134762, now seen corresponding path program 2 times [2024-06-27 19:33:47,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:47,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186088804] [2024-06-27 19:33:47,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:47,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:47,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:47,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:47,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186088804] [2024-06-27 19:33:47,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186088804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:47,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:47,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:47,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521628134] [2024-06-27 19:33:47,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:47,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:47,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:47,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:47,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:48,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:48,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 316 transitions, 3838 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:48,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:48,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:48,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:48,815 INFO L124 PetriNetUnfolderBase]: 3495/6086 cut-off events. [2024-06-27 19:33:48,815 INFO L125 PetriNetUnfolderBase]: For 407376/407376 co-relation queries the response was YES. [2024-06-27 19:33:48,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37828 conditions, 6086 events. 3495/6086 cut-off events. For 407376/407376 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42243 event pairs, 1045 based on Foata normal form. 4/6088 useless extension candidates. Maximal degree in co-relation 37721. Up to 5497 conditions per place. [2024-06-27 19:33:48,871 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 314 selfloop transitions, 21 changer transitions 0/344 dead transitions. [2024-06-27 19:33:48,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 344 transitions, 4578 flow [2024-06-27 19:33:48,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:33:48,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:33:48,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:33:48,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-27 19:33:48,872 INFO L175 Difference]: Start difference. First operand has 233 places, 316 transitions, 3838 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:33:48,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 344 transitions, 4578 flow [2024-06-27 19:33:49,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 344 transitions, 4523 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:49,783 INFO L231 Difference]: Finished difference. Result has 236 places, 316 transitions, 3831 flow [2024-06-27 19:33:49,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3831, PETRI_PLACES=236, PETRI_TRANSITIONS=316} [2024-06-27 19:33:49,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-27 19:33:49,784 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 316 transitions, 3831 flow [2024-06-27 19:33:49,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:49,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:49,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:49,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:33:49,785 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)] === [2024-06-27 19:33:49,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 986084886, now seen corresponding path program 3 times [2024-06-27 19:33:49,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:49,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077386660] [2024-06-27 19:33:49,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:49,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:49,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:49,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:49,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077386660] [2024-06-27 19:33:49,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077386660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:49,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:49,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:49,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379084610] [2024-06-27 19:33:49,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:49,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:49,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:49,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:49,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:49,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:49,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 316 transitions, 3831 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:49,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:49,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:49,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:50,692 INFO L124 PetriNetUnfolderBase]: 3511/6098 cut-off events. [2024-06-27 19:33:50,692 INFO L125 PetriNetUnfolderBase]: For 421421/421421 co-relation queries the response was YES. [2024-06-27 19:33:50,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6098 events. 3511/6098 cut-off events. For 421421/421421 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42273 event pairs, 1068 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 38131. Up to 5299 conditions per place. [2024-06-27 19:33:50,759 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 91 changer transitions 0/340 dead transitions. [2024-06-27 19:33:50,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 340 transitions, 5065 flow [2024-06-27 19:33:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:50,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:50,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-27 19:33:50,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-27 19:33:50,760 INFO L175 Difference]: Start difference. First operand has 236 places, 316 transitions, 3831 flow. Second operand 7 states and 183 transitions. [2024-06-27 19:33:50,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 340 transitions, 5065 flow [2024-06-27 19:33:51,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 340 transitions, 4993 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-27 19:33:51,826 INFO L231 Difference]: Finished difference. Result has 235 places, 319 transitions, 4049 flow [2024-06-27 19:33:51,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4049, PETRI_PLACES=235, PETRI_TRANSITIONS=319} [2024-06-27 19:33:51,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-27 19:33:51,827 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 319 transitions, 4049 flow [2024-06-27 19:33:51,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:51,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:51,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:51,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:33:51,827 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)] === [2024-06-27 19:33:51,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:51,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1125194538, now seen corresponding path program 1 times [2024-06-27 19:33:51,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:51,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110194753] [2024-06-27 19:33:51,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:51,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:51,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:51,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110194753] [2024-06-27 19:33:51,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110194753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:51,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:51,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:51,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142301488] [2024-06-27 19:33:51,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:51,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:51,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:51,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:51,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:51,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:51,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 319 transitions, 4049 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:51,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:51,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:51,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:52,742 INFO L124 PetriNetUnfolderBase]: 3516/6106 cut-off events. [2024-06-27 19:33:52,742 INFO L125 PetriNetUnfolderBase]: For 426449/426449 co-relation queries the response was YES. [2024-06-27 19:33:52,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38751 conditions, 6106 events. 3516/6106 cut-off events. For 426449/426449 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42331 event pairs, 1077 based on Foata normal form. 1/6095 useless extension candidates. Maximal degree in co-relation 38642. Up to 5336 conditions per place. [2024-06-27 19:33:52,801 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 78 changer transitions 0/346 dead transitions. [2024-06-27 19:33:52,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 346 transitions, 4957 flow [2024-06-27 19:33:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:52,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:33:52,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:33:52,802 INFO L175 Difference]: Start difference. First operand has 235 places, 319 transitions, 4049 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:33:52,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 346 transitions, 4957 flow [2024-06-27 19:33:53,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4689 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 19:33:53,928 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 3973 flow [2024-06-27 19:33:53,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3973, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2024-06-27 19:33:53,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 19:33:53,928 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 3973 flow [2024-06-27 19:33:53,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:53,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:53,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:53,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:33:53,929 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)] === [2024-06-27 19:33:53,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 634389880, now seen corresponding path program 2 times [2024-06-27 19:33:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:53,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181901558] [2024-06-27 19:33:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:53,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:53,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181901558] [2024-06-27 19:33:53,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181901558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:53,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:53,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:33:53,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11538993] [2024-06-27 19:33:53,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:53,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:33:53,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:53,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:33:53,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:33:53,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:53,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 3973 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:53,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:53,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:53,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:54,740 INFO L124 PetriNetUnfolderBase]: 3529/6127 cut-off events. [2024-06-27 19:33:54,740 INFO L125 PetriNetUnfolderBase]: For 437587/437587 co-relation queries the response was YES. [2024-06-27 19:33:54,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38791 conditions, 6127 events. 3529/6127 cut-off events. For 437587/437587 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 42497 event pairs, 1077 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 38681. Up to 5346 conditions per place. [2024-06-27 19:33:54,802 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 86 changer transitions 0/346 dead transitions. [2024-06-27 19:33:54,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 346 transitions, 5055 flow [2024-06-27 19:33:54,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:33:54,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:33:54,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 19:33:54,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 19:33:54,803 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 3973 flow. Second operand 6 states and 160 transitions. [2024-06-27 19:33:54,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 346 transitions, 5055 flow [2024-06-27 19:33:55,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 346 transitions, 4895 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:33:56,003 INFO L231 Difference]: Finished difference. Result has 239 places, 328 transitions, 4063 flow [2024-06-27 19:33:56,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4063, PETRI_PLACES=239, PETRI_TRANSITIONS=328} [2024-06-27 19:33:56,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 19:33:56,004 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 328 transitions, 4063 flow [2024-06-27 19:33:56,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:33:56,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:56,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:56,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:33:56,004 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)] === [2024-06-27 19:33:56,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:56,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1974182714, now seen corresponding path program 3 times [2024-06-27 19:33:56,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:56,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804351] [2024-06-27 19:33:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:56,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:56,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:56,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:56,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:56,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804351] [2024-06-27 19:33:56,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:56,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:56,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:56,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425515291] [2024-06-27 19:33:56,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:56,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:56,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:56,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:56,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:56,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:56,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 328 transitions, 4063 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:56,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:56,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:56,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:56,870 INFO L124 PetriNetUnfolderBase]: 3526/6126 cut-off events. [2024-06-27 19:33:56,870 INFO L125 PetriNetUnfolderBase]: For 446069/446069 co-relation queries the response was YES. [2024-06-27 19:33:56,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 6126 events. 3526/6126 cut-off events. For 446069/446069 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42610 event pairs, 1059 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 38742. Up to 5334 conditions per place. [2024-06-27 19:33:56,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 83 changer transitions 0/350 dead transitions. [2024-06-27 19:33:56,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 350 transitions, 5095 flow [2024-06-27 19:33:56,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:56,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:56,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:33:56,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-27 19:33:56,934 INFO L175 Difference]: Start difference. First operand has 239 places, 328 transitions, 4063 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:33:56,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 350 transitions, 5095 flow [2024-06-27 19:33:58,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 350 transitions, 4985 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:33:58,052 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4125 flow [2024-06-27 19:33:58,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4125, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-27 19:33:58,053 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-27 19:33:58,053 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4125 flow [2024-06-27 19:33:58,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:58,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:33:58,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:33:58,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:33:58,053 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)] === [2024-06-27 19:33:58,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:33:58,054 INFO L85 PathProgramCache]: Analyzing trace with hash 218188978, now seen corresponding path program 4 times [2024-06-27 19:33:58,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:33:58,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915630680] [2024-06-27 19:33:58,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:33:58,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:33:58,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:33:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:33:58,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:33:58,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915630680] [2024-06-27 19:33:58,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915630680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:33:58,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:33:58,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:33:58,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113504788] [2024-06-27 19:33:58,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:33:58,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:33:58,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:33:58,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:33:58,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:33:58,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:33:58,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4125 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:33:58,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:33:58,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:33:58,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:33:58,952 INFO L124 PetriNetUnfolderBase]: 3520/6096 cut-off events. [2024-06-27 19:33:58,952 INFO L125 PetriNetUnfolderBase]: For 456153/456153 co-relation queries the response was YES. [2024-06-27 19:33:58,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38826 conditions, 6096 events. 3520/6096 cut-off events. For 456153/456153 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42272 event pairs, 1098 based on Foata normal form. 2/6084 useless extension candidates. Maximal degree in co-relation 38714. Up to 5329 conditions per place. [2024-06-27 19:33:59,015 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 82 changer transitions 0/341 dead transitions. [2024-06-27 19:33:59,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 341 transitions, 5119 flow [2024-06-27 19:33:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:33:59,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:33:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:33:59,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-27 19:33:59,015 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4125 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:33:59,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 341 transitions, 5119 flow [2024-06-27 19:34:00,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 341 transitions, 4884 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:00,068 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4061 flow [2024-06-27 19:34:00,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-27 19:34:00,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-27 19:34:00,069 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4061 flow [2024-06-27 19:34:00,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:00,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:00,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:00,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:34:00,069 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)] === [2024-06-27 19:34:00,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:00,069 INFO L85 PathProgramCache]: Analyzing trace with hash 140109334, now seen corresponding path program 4 times [2024-06-27 19:34:00,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:00,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873522532] [2024-06-27 19:34:00,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:00,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:00,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:00,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:00,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873522532] [2024-06-27 19:34:00,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873522532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:00,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:00,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:00,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101071360] [2024-06-27 19:34:00,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:00,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:00,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:00,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:00,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:00,187 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:00,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4061 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:00,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:00,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:00,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:00,980 INFO L124 PetriNetUnfolderBase]: 3579/6187 cut-off events. [2024-06-27 19:34:00,980 INFO L125 PetriNetUnfolderBase]: For 516797/516797 co-relation queries the response was YES. [2024-06-27 19:34:01,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 6187 events. 3579/6187 cut-off events. For 516797/516797 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 42994 event pairs, 1107 based on Foata normal form. 20/6193 useless extension candidates. Maximal degree in co-relation 39347. Up to 5346 conditions per place. [2024-06-27 19:34:01,042 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 84 changer transitions 0/348 dead transitions. [2024-06-27 19:34:01,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 348 transitions, 5197 flow [2024-06-27 19:34:01,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:01,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:01,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:34:01,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:34:01,043 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4061 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:34:01,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 348 transitions, 5197 flow [2024-06-27 19:34:02,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 348 transitions, 5005 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:02,233 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4152 flow [2024-06-27 19:34:02,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4152, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-27 19:34:02,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-27 19:34:02,234 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4152 flow [2024-06-27 19:34:02,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:02,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:02,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:02,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:34:02,234 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)] === [2024-06-27 19:34:02,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:02,234 INFO L85 PathProgramCache]: Analyzing trace with hash 161026214, now seen corresponding path program 3 times [2024-06-27 19:34:02,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:02,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474040898] [2024-06-27 19:34:02,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:02,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:02,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:02,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:02,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:02,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474040898] [2024-06-27 19:34:02,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474040898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:02,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:02,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:02,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530211933] [2024-06-27 19:34:02,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:02,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:02,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:02,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:02,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:02,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:02,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4152 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:02,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:02,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:02,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:03,144 INFO L124 PetriNetUnfolderBase]: 3584/6223 cut-off events. [2024-06-27 19:34:03,144 INFO L125 PetriNetUnfolderBase]: For 473250/473250 co-relation queries the response was YES. [2024-06-27 19:34:03,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 6223 events. 3584/6223 cut-off events. For 473250/473250 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43320 event pairs, 1083 based on Foata normal form. 1/6220 useless extension candidates. Maximal degree in co-relation 39708. Up to 5431 conditions per place. [2024-06-27 19:34:03,213 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/355 dead transitions. [2024-06-27 19:34:03,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 355 transitions, 5083 flow [2024-06-27 19:34:03,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:03,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:03,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:34:03,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-27 19:34:03,214 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4152 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:34:03,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 355 transitions, 5083 flow [2024-06-27 19:34:04,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 355 transitions, 4838 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:04,357 INFO L231 Difference]: Finished difference. Result has 247 places, 334 transitions, 4104 flow [2024-06-27 19:34:04,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4104, PETRI_PLACES=247, PETRI_TRANSITIONS=334} [2024-06-27 19:34:04,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-27 19:34:04,357 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 334 transitions, 4104 flow [2024-06-27 19:34:04,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:04,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:04,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:04,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:34:04,358 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)] === [2024-06-27 19:34:04,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1120228062, now seen corresponding path program 4 times [2024-06-27 19:34:04,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:04,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981930377] [2024-06-27 19:34:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:04,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:04,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:04,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:04,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981930377] [2024-06-27 19:34:04,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981930377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:04,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:04,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:04,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205560579] [2024-06-27 19:34:04,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:04,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:04,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:04,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:04,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:04,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:04,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 334 transitions, 4104 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:04,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:04,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:04,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:05,248 INFO L124 PetriNetUnfolderBase]: 3581/6219 cut-off events. [2024-06-27 19:34:05,248 INFO L125 PetriNetUnfolderBase]: For 476342/476342 co-relation queries the response was YES. [2024-06-27 19:34:05,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39291 conditions, 6219 events. 3581/6219 cut-off events. For 476342/476342 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43341 event pairs, 1076 based on Foata normal form. 1/6216 useless extension candidates. Maximal degree in co-relation 39175. Up to 5429 conditions per place. [2024-06-27 19:34:05,312 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 80 changer transitions 0/358 dead transitions. [2024-06-27 19:34:05,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 358 transitions, 5172 flow [2024-06-27 19:34:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:05,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-27 19:34:05,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-27 19:34:05,312 INFO L175 Difference]: Start difference. First operand has 247 places, 334 transitions, 4104 flow. Second operand 9 states and 227 transitions. [2024-06-27 19:34:05,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 358 transitions, 5172 flow [2024-06-27 19:34:06,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 358 transitions, 5063 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:06,518 INFO L231 Difference]: Finished difference. Result has 252 places, 334 transitions, 4161 flow [2024-06-27 19:34:06,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4161, PETRI_PLACES=252, PETRI_TRANSITIONS=334} [2024-06-27 19:34:06,518 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 19:34:06,519 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 334 transitions, 4161 flow [2024-06-27 19:34:06,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:06,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:06,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:06,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:34:06,519 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)] === [2024-06-27 19:34:06,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:06,519 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365594, now seen corresponding path program 5 times [2024-06-27 19:34:06,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:06,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196784503] [2024-06-27 19:34:06,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:06,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:06,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:06,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:06,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196784503] [2024-06-27 19:34:06,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196784503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:06,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:06,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:06,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473911318] [2024-06-27 19:34:06,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:06,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:06,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:06,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:06,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:06,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:06,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 334 transitions, 4161 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:06,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:06,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:06,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:07,568 INFO L124 PetriNetUnfolderBase]: 3573/6206 cut-off events. [2024-06-27 19:34:07,568 INFO L125 PetriNetUnfolderBase]: For 485321/485321 co-relation queries the response was YES. [2024-06-27 19:34:07,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39242 conditions, 6206 events. 3573/6206 cut-off events. For 485321/485321 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43204 event pairs, 1076 based on Foata normal form. 2/6204 useless extension candidates. Maximal degree in co-relation 39124. Up to 5421 conditions per place. [2024-06-27 19:34:07,626 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 77 changer transitions 0/352 dead transitions. [2024-06-27 19:34:07,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 352 transitions, 5049 flow [2024-06-27 19:34:07,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:07,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:07,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:34:07,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:34:07,627 INFO L175 Difference]: Start difference. First operand has 252 places, 334 transitions, 4161 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:34:07,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 352 transitions, 5049 flow [2024-06-27 19:34:08,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 352 transitions, 4815 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:34:08,617 INFO L231 Difference]: Finished difference. Result has 250 places, 334 transitions, 4089 flow [2024-06-27 19:34:08,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4089, PETRI_PLACES=250, PETRI_TRANSITIONS=334} [2024-06-27 19:34:08,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 19:34:08,617 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 334 transitions, 4089 flow [2024-06-27 19:34:08,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:08,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:08,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:08,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:34:08,617 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)] === [2024-06-27 19:34:08,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:08,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1947503984, now seen corresponding path program 6 times [2024-06-27 19:34:08,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:08,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395479821] [2024-06-27 19:34:08,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:08,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:08,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:08,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:08,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:08,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395479821] [2024-06-27 19:34:08,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395479821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:08,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:08,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:08,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099032353] [2024-06-27 19:34:08,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:08,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:08,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:08,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:08,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:08,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:08,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 334 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:08,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:08,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:08,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:09,455 INFO L124 PetriNetUnfolderBase]: 3583/6200 cut-off events. [2024-06-27 19:34:09,455 INFO L125 PetriNetUnfolderBase]: For 496963/496963 co-relation queries the response was YES. [2024-06-27 19:34:09,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39421 conditions, 6200 events. 3583/6200 cut-off events. For 496963/496963 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43228 event pairs, 1105 based on Foata normal form. 2/6184 useless extension candidates. Maximal degree in co-relation 39303. Up to 5431 conditions per place. [2024-06-27 19:34:09,521 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-27 19:34:09,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 349 transitions, 5008 flow [2024-06-27 19:34:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:09,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:09,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:34:09,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-27 19:34:09,522 INFO L175 Difference]: Start difference. First operand has 250 places, 334 transitions, 4089 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:34:09,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 349 transitions, 5008 flow [2024-06-27 19:34:10,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 349 transitions, 4848 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:10,634 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4157 flow [2024-06-27 19:34:10,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4157, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-27 19:34:10,634 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 19:34:10,635 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4157 flow [2024-06-27 19:34:10,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:10,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:10,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:10,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:34:10,635 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)] === [2024-06-27 19:34:10,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:10,635 INFO L85 PathProgramCache]: Analyzing trace with hash -298911146, now seen corresponding path program 7 times [2024-06-27 19:34:10,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:10,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543769932] [2024-06-27 19:34:10,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:10,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:10,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:10,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:10,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:10,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543769932] [2024-06-27 19:34:10,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543769932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:10,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:10,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:10,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047179050] [2024-06-27 19:34:10,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:10,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:10,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:10,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:10,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:10,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:10,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:10,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:10,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:10,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:11,558 INFO L124 PetriNetUnfolderBase]: 3575/6188 cut-off events. [2024-06-27 19:34:11,558 INFO L125 PetriNetUnfolderBase]: For 501744/501744 co-relation queries the response was YES. [2024-06-27 19:34:11,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39328 conditions, 6188 events. 3575/6188 cut-off events. For 501744/501744 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43075 event pairs, 1105 based on Foata normal form. 2/6172 useless extension candidates. Maximal degree in co-relation 39209. Up to 5423 conditions per place. [2024-06-27 19:34:11,622 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 80 changer transitions 0/348 dead transitions. [2024-06-27 19:34:11,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 348 transitions, 4859 flow [2024-06-27 19:34:11,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:11,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:34:11,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:34:11,623 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4157 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:34:11,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 348 transitions, 4859 flow [2024-06-27 19:34:12,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4564 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:12,757 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4031 flow [2024-06-27 19:34:12,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4031, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-27 19:34:12,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-27 19:34:12,757 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4031 flow [2024-06-27 19:34:12,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:12,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:12,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:12,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:34:12,758 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)] === [2024-06-27 19:34:12,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:12,758 INFO L85 PathProgramCache]: Analyzing trace with hash -869801354, now seen corresponding path program 1 times [2024-06-27 19:34:12,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:12,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269495614] [2024-06-27 19:34:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:12,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:12,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:12,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269495614] [2024-06-27 19:34:12,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269495614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:12,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:12,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092727401] [2024-06-27 19:34:12,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:12,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:12,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:12,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:12,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:12,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:12,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4031 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:12,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:12,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:12,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:13,744 INFO L124 PetriNetUnfolderBase]: 3596/6248 cut-off events. [2024-06-27 19:34:13,744 INFO L125 PetriNetUnfolderBase]: For 520955/520955 co-relation queries the response was YES. [2024-06-27 19:34:13,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 6248 events. 3596/6248 cut-off events. For 520955/520955 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43512 event pairs, 967 based on Foata normal form. 2/6248 useless extension candidates. Maximal degree in co-relation 39868. Up to 5636 conditions per place. [2024-06-27 19:34:13,812 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 330 selfloop transitions, 27 changer transitions 0/366 dead transitions. [2024-06-27 19:34:13,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 366 transitions, 5119 flow [2024-06-27 19:34:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:34:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:34:13,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-27 19:34:13,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-27 19:34:13,813 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4031 flow. Second operand 8 states and 197 transitions. [2024-06-27 19:34:13,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 366 transitions, 5119 flow [2024-06-27 19:34:15,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 366 transitions, 4925 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:15,098 INFO L231 Difference]: Finished difference. Result has 252 places, 342 transitions, 4052 flow [2024-06-27 19:34:15,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4052, PETRI_PLACES=252, PETRI_TRANSITIONS=342} [2024-06-27 19:34:15,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-27 19:34:15,099 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 342 transitions, 4052 flow [2024-06-27 19:34:15,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:15,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:15,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:15,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:34:15,100 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)] === [2024-06-27 19:34:15,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:15,100 INFO L85 PathProgramCache]: Analyzing trace with hash 256529304, now seen corresponding path program 2 times [2024-06-27 19:34:15,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:15,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093626913] [2024-06-27 19:34:15,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:15,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:15,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:15,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093626913] [2024-06-27 19:34:15,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093626913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:15,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:15,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:15,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223928224] [2024-06-27 19:34:15,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:15,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:15,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:15,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:15,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:15,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:15,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 342 transitions, 4052 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:15,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:15,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:15,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:16,075 INFO L124 PetriNetUnfolderBase]: 3591/6241 cut-off events. [2024-06-27 19:34:16,075 INFO L125 PetriNetUnfolderBase]: For 526082/526082 co-relation queries the response was YES. [2024-06-27 19:34:16,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39757 conditions, 6241 events. 3591/6241 cut-off events. For 526082/526082 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43453 event pairs, 1050 based on Foata normal form. 2/6241 useless extension candidates. Maximal degree in co-relation 39636. Up to 5664 conditions per place. [2024-06-27 19:34:16,142 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 329 selfloop transitions, 22 changer transitions 0/360 dead transitions. [2024-06-27 19:34:16,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 360 transitions, 4798 flow [2024-06-27 19:34:16,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:16,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-27 19:34:16,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-27 19:34:16,143 INFO L175 Difference]: Start difference. First operand has 252 places, 342 transitions, 4052 flow. Second operand 7 states and 172 transitions. [2024-06-27 19:34:16,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 360 transitions, 4798 flow [2024-06-27 19:34:17,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 360 transitions, 4635 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:17,395 INFO L231 Difference]: Finished difference. Result has 255 places, 342 transitions, 3938 flow [2024-06-27 19:34:17,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3938, PETRI_PLACES=255, PETRI_TRANSITIONS=342} [2024-06-27 19:34:17,395 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 19:34:17,395 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 342 transitions, 3938 flow [2024-06-27 19:34:17,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 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) [2024-06-27 19:34:17,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:17,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:17,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:34:17,396 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)] === [2024-06-27 19:34:17,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:17,396 INFO L85 PathProgramCache]: Analyzing trace with hash 392142586, now seen corresponding path program 3 times [2024-06-27 19:34:17,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:17,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501428805] [2024-06-27 19:34:17,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:17,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:17,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:17,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:17,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501428805] [2024-06-27 19:34:17,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501428805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:17,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:17,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:17,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258180055] [2024-06-27 19:34:17,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:17,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:17,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:17,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:17,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:17,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:17,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 342 transitions, 3938 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:17,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:17,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:17,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:18,302 INFO L124 PetriNetUnfolderBase]: 3586/6227 cut-off events. [2024-06-27 19:34:18,302 INFO L125 PetriNetUnfolderBase]: For 531044/531044 co-relation queries the response was YES. [2024-06-27 19:34:18,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39429 conditions, 6227 events. 3586/6227 cut-off events. For 531044/531044 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43358 event pairs, 1056 based on Foata normal form. 2/6222 useless extension candidates. Maximal degree in co-relation 39306. Up to 5657 conditions per place. [2024-06-27 19:34:18,371 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 324 selfloop transitions, 22 changer transitions 0/355 dead transitions. [2024-06-27 19:34:18,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 355 transitions, 4736 flow [2024-06-27 19:34:18,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:18,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-27 19:34:18,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-27 19:34:18,373 INFO L175 Difference]: Start difference. First operand has 255 places, 342 transitions, 3938 flow. Second operand 6 states and 146 transitions. [2024-06-27 19:34:18,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 355 transitions, 4736 flow [2024-06-27 19:34:19,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 355 transitions, 4682 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:19,945 INFO L231 Difference]: Finished difference. Result has 255 places, 344 transitions, 4017 flow [2024-06-27 19:34:19,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4017, PETRI_PLACES=255, PETRI_TRANSITIONS=344} [2024-06-27 19:34:19,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-27 19:34:19,946 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 344 transitions, 4017 flow [2024-06-27 19:34:19,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:19,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:19,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:19,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:34:19,946 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)] === [2024-06-27 19:34:19,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:19,946 INFO L85 PathProgramCache]: Analyzing trace with hash -640411164, now seen corresponding path program 1 times [2024-06-27 19:34:19,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:19,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833890] [2024-06-27 19:34:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:19,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:19,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:20,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833890] [2024-06-27 19:34:20,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:20,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:20,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:20,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113469461] [2024-06-27 19:34:20,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:20,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:20,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:20,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:20,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:20,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:20,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 344 transitions, 4017 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:20,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:20,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:20,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:20,852 INFO L124 PetriNetUnfolderBase]: 3591/6232 cut-off events. [2024-06-27 19:34:20,852 INFO L125 PetriNetUnfolderBase]: For 539044/539044 co-relation queries the response was YES. [2024-06-27 19:34:20,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39665 conditions, 6232 events. 3591/6232 cut-off events. For 539044/539044 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43435 event pairs, 1060 based on Foata normal form. 1/6227 useless extension candidates. Maximal degree in co-relation 39541. Up to 5543 conditions per place. [2024-06-27 19:34:20,923 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 58 changer transitions 0/361 dead transitions. [2024-06-27 19:34:20,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 4974 flow [2024-06-27 19:34:20,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:20,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:20,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:34:20,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 19:34:20,924 INFO L175 Difference]: Start difference. First operand has 255 places, 344 transitions, 4017 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:34:20,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 4974 flow [2024-06-27 19:34:22,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 361 transitions, 4857 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:22,227 INFO L231 Difference]: Finished difference. Result has 257 places, 347 transitions, 4078 flow [2024-06-27 19:34:22,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4078, PETRI_PLACES=257, PETRI_TRANSITIONS=347} [2024-06-27 19:34:22,232 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 19:34:22,232 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 347 transitions, 4078 flow [2024-06-27 19:34:22,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:22,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:22,232 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:22,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:34:22,233 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)] === [2024-06-27 19:34:22,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:22,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1722790722, now seen corresponding path program 2 times [2024-06-27 19:34:22,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:22,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518135614] [2024-06-27 19:34:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:22,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:22,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:22,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:22,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518135614] [2024-06-27 19:34:22,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518135614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:22,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:22,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:22,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959449598] [2024-06-27 19:34:22,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:22,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:22,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:22,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:22,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:22,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:22,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 347 transitions, 4078 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:22,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:22,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:22,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:23,286 INFO L124 PetriNetUnfolderBase]: 3588/6228 cut-off events. [2024-06-27 19:34:23,286 INFO L125 PetriNetUnfolderBase]: For 546408/546408 co-relation queries the response was YES. [2024-06-27 19:34:23,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39700 conditions, 6228 events. 3588/6228 cut-off events. For 546408/546408 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43333 event pairs, 1060 based on Foata normal form. 1/6223 useless extension candidates. Maximal degree in co-relation 39575. Up to 5540 conditions per place. [2024-06-27 19:34:23,359 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 56 changer transitions 0/360 dead transitions. [2024-06-27 19:34:23,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 360 transitions, 4812 flow [2024-06-27 19:34:23,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:23,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:23,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:34:23,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:34:23,360 INFO L175 Difference]: Start difference. First operand has 257 places, 347 transitions, 4078 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:34:23,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 360 transitions, 4812 flow [2024-06-27 19:34:24,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 360 transitions, 4687 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:24,841 INFO L231 Difference]: Finished difference. Result has 258 places, 347 transitions, 4076 flow [2024-06-27 19:34:24,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4076, PETRI_PLACES=258, PETRI_TRANSITIONS=347} [2024-06-27 19:34:24,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-27 19:34:24,842 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 347 transitions, 4076 flow [2024-06-27 19:34:24,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:24,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:24,842 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] [2024-06-27 19:34:24,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:34:24,842 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)] === [2024-06-27 19:34:24,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:24,842 INFO L85 PathProgramCache]: Analyzing trace with hash 403318402, now seen corresponding path program 3 times [2024-06-27 19:34:24,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:24,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476806558] [2024-06-27 19:34:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:24,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:24,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:24,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476806558] [2024-06-27 19:34:24,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476806558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:24,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:24,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:24,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899172527] [2024-06-27 19:34:24,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:24,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:24,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:24,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:24,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 347 transitions, 4076 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:24,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:24,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:24,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:25,831 INFO L124 PetriNetUnfolderBase]: 3593/6237 cut-off events. [2024-06-27 19:34:25,832 INFO L125 PetriNetUnfolderBase]: For 546603/546603 co-relation queries the response was YES. [2024-06-27 19:34:25,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39769 conditions, 6237 events. 3593/6237 cut-off events. For 546603/546603 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43469 event pairs, 1086 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 39644. Up to 5443 conditions per place. [2024-06-27 19:34:25,908 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 272 selfloop transitions, 88 changer transitions 0/369 dead transitions. [2024-06-27 19:34:25,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 369 transitions, 5235 flow [2024-06-27 19:34:25,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:25,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:25,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:34:25,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:34:25,909 INFO L175 Difference]: Start difference. First operand has 258 places, 347 transitions, 4076 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:34:25,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 369 transitions, 5235 flow [2024-06-27 19:34:27,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 369 transitions, 5080 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:27,237 INFO L231 Difference]: Finished difference. Result has 259 places, 350 transitions, 4157 flow [2024-06-27 19:34:27,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4157, PETRI_PLACES=259, PETRI_TRANSITIONS=350} [2024-06-27 19:34:27,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 19:34:27,238 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 350 transitions, 4157 flow [2024-06-27 19:34:27,238 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:27,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:27,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:27,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:34:27,238 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)] === [2024-06-27 19:34:27,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:27,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1004114152, now seen corresponding path program 4 times [2024-06-27 19:34:27,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:27,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190856411] [2024-06-27 19:34:27,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:27,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:27,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:27,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:27,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190856411] [2024-06-27 19:34:27,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190856411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:27,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:27,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:27,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854247636] [2024-06-27 19:34:27,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:27,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:27,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:27,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:27,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 350 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:27,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:27,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:27,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:28,193 INFO L124 PetriNetUnfolderBase]: 3598/6246 cut-off events. [2024-06-27 19:34:28,193 INFO L125 PetriNetUnfolderBase]: For 546993/546993 co-relation queries the response was YES. [2024-06-27 19:34:28,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39898 conditions, 6246 events. 3598/6246 cut-off events. For 546993/546993 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 43580 event pairs, 1089 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 39773. Up to 5449 conditions per place. [2024-06-27 19:34:28,260 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 271 selfloop transitions, 91 changer transitions 0/371 dead transitions. [2024-06-27 19:34:28,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5324 flow [2024-06-27 19:34:28,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:28,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:28,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-27 19:34:28,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 19:34:28,261 INFO L175 Difference]: Start difference. First operand has 259 places, 350 transitions, 4157 flow. Second operand 6 states and 160 transitions. [2024-06-27 19:34:28,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5324 flow [2024-06-27 19:34:29,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 371 transitions, 5099 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:29,349 INFO L231 Difference]: Finished difference. Result has 259 places, 353 transitions, 4176 flow [2024-06-27 19:34:29,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4176, PETRI_PLACES=259, PETRI_TRANSITIONS=353} [2024-06-27 19:34:29,349 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 19:34:29,350 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 353 transitions, 4176 flow [2024-06-27 19:34:29,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:29,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:29,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:29,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:34:29,350 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)] === [2024-06-27 19:34:29,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:29,350 INFO L85 PathProgramCache]: Analyzing trace with hash -308665636, now seen corresponding path program 5 times [2024-06-27 19:34:29,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:29,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141083776] [2024-06-27 19:34:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:29,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:29,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:29,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:29,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141083776] [2024-06-27 19:34:29,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141083776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:29,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:29,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132873874] [2024-06-27 19:34:29,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:29,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:29,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:29,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:29,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:29,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 353 transitions, 4176 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:29,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:29,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:29,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:30,242 INFO L124 PetriNetUnfolderBase]: 3611/6257 cut-off events. [2024-06-27 19:34:30,242 INFO L125 PetriNetUnfolderBase]: For 563815/563815 co-relation queries the response was YES. [2024-06-27 19:34:30,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40224 conditions, 6257 events. 3611/6257 cut-off events. For 563815/563815 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43689 event pairs, 1115 based on Foata normal form. 1/6244 useless extension candidates. Maximal degree in co-relation 40098. Up to 5464 conditions per place. [2024-06-27 19:34:30,313 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 96 changer transitions 0/371 dead transitions. [2024-06-27 19:34:30,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5376 flow [2024-06-27 19:34:30,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:30,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:30,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:34:30,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:34:30,314 INFO L175 Difference]: Start difference. First operand has 259 places, 353 transitions, 4176 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:34:30,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5376 flow [2024-06-27 19:34:31,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 5184 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:31,845 INFO L231 Difference]: Finished difference. Result has 261 places, 359 transitions, 4282 flow [2024-06-27 19:34:31,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4282, PETRI_PLACES=261, PETRI_TRANSITIONS=359} [2024-06-27 19:34:31,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-27 19:34:31,846 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 359 transitions, 4282 flow [2024-06-27 19:34:31,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:31,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:31,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:31,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:34:31,846 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)] === [2024-06-27 19:34:31,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:31,846 INFO L85 PathProgramCache]: Analyzing trace with hash -565569766, now seen corresponding path program 6 times [2024-06-27 19:34:31,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:31,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190356848] [2024-06-27 19:34:31,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:31,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:31,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:31,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:31,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190356848] [2024-06-27 19:34:31,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190356848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:31,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:31,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:34:31,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763011937] [2024-06-27 19:34:31,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:31,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:34:31,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:31,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:34:31,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:34:31,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:31,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 359 transitions, 4282 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:31,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:31,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:31,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:32,792 INFO L124 PetriNetUnfolderBase]: 3608/6264 cut-off events. [2024-06-27 19:34:32,793 INFO L125 PetriNetUnfolderBase]: For 571316/571316 co-relation queries the response was YES. [2024-06-27 19:34:32,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40257 conditions, 6264 events. 3608/6264 cut-off events. For 571316/571316 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43663 event pairs, 1089 based on Foata normal form. 1/6259 useless extension candidates. Maximal degree in co-relation 40130. Up to 5461 conditions per place. [2024-06-27 19:34:32,855 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 101 changer transitions 0/374 dead transitions. [2024-06-27 19:34:32,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 374 transitions, 5400 flow [2024-06-27 19:34:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:34:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:34:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-27 19:34:32,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-27 19:34:32,856 INFO L175 Difference]: Start difference. First operand has 261 places, 359 transitions, 4282 flow. Second operand 6 states and 157 transitions. [2024-06-27 19:34:32,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 374 transitions, 5400 flow [2024-06-27 19:34:34,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 5186 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:34,281 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 4276 flow [2024-06-27 19:34:34,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4276, PETRI_PLACES=263, PETRI_TRANSITIONS=359} [2024-06-27 19:34:34,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-27 19:34:34,282 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 4276 flow [2024-06-27 19:34:34,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:34:34,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:34,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:34,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:34:34,282 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)] === [2024-06-27 19:34:34,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:34,282 INFO L85 PathProgramCache]: Analyzing trace with hash -313427236, now seen corresponding path program 7 times [2024-06-27 19:34:34,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:34,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438851175] [2024-06-27 19:34:34,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:34,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:34,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:34,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:34,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:34,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438851175] [2024-06-27 19:34:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438851175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:34,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778306338] [2024-06-27 19:34:34,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:34,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:34,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:34,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 359 transitions, 4276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:34,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:34,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:34,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:35,213 INFO L124 PetriNetUnfolderBase]: 3613/6249 cut-off events. [2024-06-27 19:34:35,214 INFO L125 PetriNetUnfolderBase]: For 584496/584496 co-relation queries the response was YES. [2024-06-27 19:34:35,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40392 conditions, 6249 events. 3613/6249 cut-off events. For 584496/584496 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43535 event pairs, 1108 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40266. Up to 5467 conditions per place. [2024-06-27 19:34:35,283 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 104 changer transitions 0/374 dead transitions. [2024-06-27 19:34:35,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 374 transitions, 5264 flow [2024-06-27 19:34:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:35,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:35,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-27 19:34:35,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 19:34:35,284 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 4276 flow. Second operand 7 states and 175 transitions. [2024-06-27 19:34:35,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 374 transitions, 5264 flow [2024-06-27 19:34:36,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 4889 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:34:37,001 INFO L231 Difference]: Finished difference. Result has 263 places, 362 transitions, 4167 flow [2024-06-27 19:34:37,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4167, PETRI_PLACES=263, PETRI_TRANSITIONS=362} [2024-06-27 19:34:37,002 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-27 19:34:37,002 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 362 transitions, 4167 flow [2024-06-27 19:34:37,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:37,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:37,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:37,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:34:37,002 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)] === [2024-06-27 19:34:37,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:37,003 INFO L85 PathProgramCache]: Analyzing trace with hash 2100307012, now seen corresponding path program 8 times [2024-06-27 19:34:37,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:37,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786479200] [2024-06-27 19:34:37,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:37,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:37,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786479200] [2024-06-27 19:34:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786479200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:37,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:37,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515611957] [2024-06-27 19:34:37,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:37,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:37,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:37,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:37,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:37,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:37,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 362 transitions, 4167 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:37,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:37,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:37,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:37,991 INFO L124 PetriNetUnfolderBase]: 3610/6249 cut-off events. [2024-06-27 19:34:37,991 INFO L125 PetriNetUnfolderBase]: For 590582/590582 co-relation queries the response was YES. [2024-06-27 19:34:38,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40312 conditions, 6249 events. 3610/6249 cut-off events. For 590582/590582 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43578 event pairs, 1103 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40186. Up to 5464 conditions per place. [2024-06-27 19:34:38,060 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-27 19:34:38,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 376 transitions, 5113 flow [2024-06-27 19:34:38,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:34:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:34:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-27 19:34:38,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-27 19:34:38,061 INFO L175 Difference]: Start difference. First operand has 263 places, 362 transitions, 4167 flow. Second operand 9 states and 215 transitions. [2024-06-27 19:34:38,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 376 transitions, 5113 flow [2024-06-27 19:34:39,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 376 transitions, 4956 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:34:39,547 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 4218 flow [2024-06-27 19:34:39,547 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4218, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-27 19:34:39,547 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 19:34:39,548 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 4218 flow [2024-06-27 19:34:39,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,548 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:39,548 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:39,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:34:39,548 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)] === [2024-06-27 19:34:39,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash -386748126, now seen corresponding path program 9 times [2024-06-27 19:34:39,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:39,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671322559] [2024-06-27 19:34:39,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:39,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:39,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:39,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:39,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671322559] [2024-06-27 19:34:39,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671322559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:39,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:39,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:39,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684902914] [2024-06-27 19:34:39,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:39,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:39,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:39,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:39,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:39,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:39,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 4218 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:39,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:39,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:39,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:40,517 INFO L124 PetriNetUnfolderBase]: 3607/6245 cut-off events. [2024-06-27 19:34:40,517 INFO L125 PetriNetUnfolderBase]: For 599720/599720 co-relation queries the response was YES. [2024-06-27 19:34:40,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 6245 events. 3607/6245 cut-off events. For 599720/599720 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43535 event pairs, 1103 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 40214. Up to 5461 conditions per place. [2024-06-27 19:34:40,590 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 99 changer transitions 0/373 dead transitions. [2024-06-27 19:34:40,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 373 transitions, 4972 flow [2024-06-27 19:34:40,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:40,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:34:40,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-27 19:34:40,591 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 4218 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:34:40,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 373 transitions, 4972 flow [2024-06-27 19:34:42,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 373 transitions, 4572 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-27 19:34:42,528 INFO L231 Difference]: Finished difference. Result has 264 places, 362 transitions, 4023 flow [2024-06-27 19:34:42,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3818, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4023, PETRI_PLACES=264, PETRI_TRANSITIONS=362} [2024-06-27 19:34:42,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 19:34:42,528 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 362 transitions, 4023 flow [2024-06-27 19:34:42,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:42,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:42,529 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] [2024-06-27 19:34:42,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:34:42,529 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)] === [2024-06-27 19:34:42,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:42,529 INFO L85 PathProgramCache]: Analyzing trace with hash 887014298, now seen corresponding path program 1 times [2024-06-27 19:34:42,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:42,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314324473] [2024-06-27 19:34:42,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:42,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:42,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:42,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314324473] [2024-06-27 19:34:42,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314324473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:42,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:42,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:42,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958103870] [2024-06-27 19:34:42,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:42,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:42,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:42,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:42,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:42,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:42,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 362 transitions, 4023 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:42,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:42,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:42,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:43,564 INFO L124 PetriNetUnfolderBase]: 3739/6468 cut-off events. [2024-06-27 19:34:43,564 INFO L125 PetriNetUnfolderBase]: For 727256/727256 co-relation queries the response was YES. [2024-06-27 19:34:43,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43183 conditions, 6468 events. 3739/6468 cut-off events. For 727256/727256 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 45308 event pairs, 1004 based on Foata normal form. 12/6474 useless extension candidates. Maximal degree in co-relation 43056. Up to 5319 conditions per place. [2024-06-27 19:34:43,637 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 68 changer transitions 0/393 dead transitions. [2024-06-27 19:34:43,637 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 393 transitions, 5191 flow [2024-06-27 19:34:43,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:43,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:43,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 19:34:43,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-27 19:34:43,638 INFO L175 Difference]: Start difference. First operand has 264 places, 362 transitions, 4023 flow. Second operand 7 states and 185 transitions. [2024-06-27 19:34:43,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 393 transitions, 5191 flow [2024-06-27 19:34:45,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 393 transitions, 4993 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:34:45,733 INFO L231 Difference]: Finished difference. Result has 266 places, 366 transitions, 4119 flow [2024-06-27 19:34:45,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4119, PETRI_PLACES=266, PETRI_TRANSITIONS=366} [2024-06-27 19:34:45,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 19:34:45,733 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 366 transitions, 4119 flow [2024-06-27 19:34:45,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:45,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:45,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:45,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:34:45,733 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)] === [2024-06-27 19:34:45,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:45,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1722793698, now seen corresponding path program 2 times [2024-06-27 19:34:45,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:45,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589990696] [2024-06-27 19:34:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:45,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:45,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:45,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:45,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589990696] [2024-06-27 19:34:45,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589990696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:45,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:45,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:45,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132636760] [2024-06-27 19:34:45,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:45,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:45,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:45,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:45,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:45,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:45,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 366 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:45,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:45,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:45,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:46,774 INFO L124 PetriNetUnfolderBase]: 3782/6564 cut-off events. [2024-06-27 19:34:46,774 INFO L125 PetriNetUnfolderBase]: For 750336/750336 co-relation queries the response was YES. [2024-06-27 19:34:46,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44068 conditions, 6564 events. 3782/6564 cut-off events. For 750336/750336 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46368 event pairs, 1106 based on Foata normal form. 16/6574 useless extension candidates. Maximal degree in co-relation 43939. Up to 5752 conditions per place. [2024-06-27 19:34:46,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 64 changer transitions 0/386 dead transitions. [2024-06-27 19:34:46,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 386 transitions, 4988 flow [2024-06-27 19:34:46,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:46,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:34:46,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:34:46,850 INFO L175 Difference]: Start difference. First operand has 266 places, 366 transitions, 4119 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:34:46,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 386 transitions, 4988 flow [2024-06-27 19:34:48,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 386 transitions, 4881 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 19:34:48,973 INFO L231 Difference]: Finished difference. Result has 270 places, 368 transitions, 4214 flow [2024-06-27 19:34:48,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4214, PETRI_PLACES=270, PETRI_TRANSITIONS=368} [2024-06-27 19:34:48,974 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-27 19:34:48,974 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 368 transitions, 4214 flow [2024-06-27 19:34:48,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:48,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:48,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:48,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:34:48,974 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)] === [2024-06-27 19:34:48,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:48,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1723149888, now seen corresponding path program 3 times [2024-06-27 19:34:48,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:48,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735816056] [2024-06-27 19:34:48,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:48,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:49,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:49,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735816056] [2024-06-27 19:34:49,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735816056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:49,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:49,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:49,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093712767] [2024-06-27 19:34:49,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:49,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:49,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:49,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:49,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:49,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:49,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 368 transitions, 4214 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:49,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:49,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:49,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:49,980 INFO L124 PetriNetUnfolderBase]: 3789/6583 cut-off events. [2024-06-27 19:34:49,980 INFO L125 PetriNetUnfolderBase]: For 725136/725136 co-relation queries the response was YES. [2024-06-27 19:34:50,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43872 conditions, 6583 events. 3789/6583 cut-off events. For 725136/725136 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 46516 event pairs, 1099 based on Foata normal form. 12/6589 useless extension candidates. Maximal degree in co-relation 43741. Up to 5677 conditions per place. [2024-06-27 19:34:50,057 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 69 changer transitions 0/391 dead transitions. [2024-06-27 19:34:50,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 391 transitions, 5109 flow [2024-06-27 19:34:50,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:34:50,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:34:50,057 INFO L175 Difference]: Start difference. First operand has 270 places, 368 transitions, 4214 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:34:50,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 391 transitions, 5109 flow [2024-06-27 19:34:52,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 391 transitions, 4950 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:52,363 INFO L231 Difference]: Finished difference. Result has 272 places, 370 transitions, 4263 flow [2024-06-27 19:34:52,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4263, PETRI_PLACES=272, PETRI_TRANSITIONS=370} [2024-06-27 19:34:52,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-27 19:34:52,364 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 370 transitions, 4263 flow [2024-06-27 19:34:52,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:52,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:52,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:52,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:34:52,364 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)] === [2024-06-27 19:34:52,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:52,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1635696000, now seen corresponding path program 4 times [2024-06-27 19:34:52,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:52,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386537033] [2024-06-27 19:34:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:52,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:52,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:52,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386537033] [2024-06-27 19:34:52,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386537033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:52,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:52,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:52,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674381575] [2024-06-27 19:34:52,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:52,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:52,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:52,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:52,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:52,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:52,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 370 transitions, 4263 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:52,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:52,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:52,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:53,416 INFO L124 PetriNetUnfolderBase]: 3845/6650 cut-off events. [2024-06-27 19:34:53,416 INFO L125 PetriNetUnfolderBase]: For 760699/760699 co-relation queries the response was YES. [2024-06-27 19:34:53,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44511 conditions, 6650 events. 3845/6650 cut-off events. For 760699/760699 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 46953 event pairs, 1175 based on Foata normal form. 16/6652 useless extension candidates. Maximal degree in co-relation 44379. Up to 5771 conditions per place. [2024-06-27 19:34:53,496 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 101 changer transitions 0/387 dead transitions. [2024-06-27 19:34:53,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 387 transitions, 5129 flow [2024-06-27 19:34:53,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:53,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:34:53,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-27 19:34:53,497 INFO L175 Difference]: Start difference. First operand has 272 places, 370 transitions, 4263 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:34:53,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 387 transitions, 5129 flow [2024-06-27 19:34:56,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 387 transitions, 4944 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-27 19:34:56,215 INFO L231 Difference]: Finished difference. Result has 274 places, 372 transitions, 4352 flow [2024-06-27 19:34:56,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4352, PETRI_PLACES=274, PETRI_TRANSITIONS=372} [2024-06-27 19:34:56,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-27 19:34:56,215 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 372 transitions, 4352 flow [2024-06-27 19:34:56,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:56,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:34:56,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:34:56,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:34:56,216 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)] === [2024-06-27 19:34:56,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:34:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1635339810, now seen corresponding path program 5 times [2024-06-27 19:34:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:34:56,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377920095] [2024-06-27 19:34:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:34:56,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:34:56,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:34:56,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:34:56,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:34:56,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377920095] [2024-06-27 19:34:56,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377920095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:34:56,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:34:56,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:34:56,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719213990] [2024-06-27 19:34:56,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:34:56,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:34:56,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:34:56,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:34:56,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:34:56,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:34:56,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 372 transitions, 4352 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:34:56,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:34:56,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:34:56,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:34:57,280 INFO L124 PetriNetUnfolderBase]: 3964/6839 cut-off events. [2024-06-27 19:34:57,280 INFO L125 PetriNetUnfolderBase]: For 826611/826611 co-relation queries the response was YES. [2024-06-27 19:34:57,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47318 conditions, 6839 events. 3964/6839 cut-off events. For 826611/826611 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 48474 event pairs, 1196 based on Foata normal form. 12/6837 useless extension candidates. Maximal degree in co-relation 47185. Up to 5712 conditions per place. [2024-06-27 19:34:57,362 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 109 changer transitions 0/395 dead transitions. [2024-06-27 19:34:57,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 395 transitions, 5512 flow [2024-06-27 19:34:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:34:57,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:34:57,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:34:57,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 19:34:57,362 INFO L175 Difference]: Start difference. First operand has 274 places, 372 transitions, 4352 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:34:57,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 395 transitions, 5512 flow [2024-06-27 19:35:00,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 395 transitions, 5262 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:00,258 INFO L231 Difference]: Finished difference. Result has 276 places, 376 transitions, 4462 flow [2024-06-27 19:35:00,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4462, PETRI_PLACES=276, PETRI_TRANSITIONS=376} [2024-06-27 19:35:00,259 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 19:35:00,259 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 376 transitions, 4462 flow [2024-06-27 19:35:00,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:00,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:00,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:00,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:35:00,259 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)] === [2024-06-27 19:35:00,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2035193310, now seen corresponding path program 6 times [2024-06-27 19:35:00,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:00,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532801434] [2024-06-27 19:35:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:00,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:00,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:00,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:00,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532801434] [2024-06-27 19:35:00,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532801434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:00,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:00,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:00,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136051236] [2024-06-27 19:35:00,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:00,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:00,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:00,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:00,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:00,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:00,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 376 transitions, 4462 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:00,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:00,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:01,412 INFO L124 PetriNetUnfolderBase]: 3928/6787 cut-off events. [2024-06-27 19:35:01,412 INFO L125 PetriNetUnfolderBase]: For 783944/783944 co-relation queries the response was YES. [2024-06-27 19:35:01,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45322 conditions, 6787 events. 3928/6787 cut-off events. For 783944/783944 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48131 event pairs, 1192 based on Foata normal form. 16/6789 useless extension candidates. Maximal degree in co-relation 45188. Up to 5904 conditions per place. [2024-06-27 19:35:01,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 106 changer transitions 0/391 dead transitions. [2024-06-27 19:35:01,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 391 transitions, 5274 flow [2024-06-27 19:35:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:01,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:35:01,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-27 19:35:01,494 INFO L175 Difference]: Start difference. First operand has 276 places, 376 transitions, 4462 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:35:01,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 391 transitions, 5274 flow [2024-06-27 19:35:04,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 391 transitions, 4955 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:04,503 INFO L231 Difference]: Finished difference. Result has 278 places, 376 transitions, 4361 flow [2024-06-27 19:35:04,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4361, PETRI_PLACES=278, PETRI_TRANSITIONS=376} [2024-06-27 19:35:04,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 19:35:04,504 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 376 transitions, 4361 flow [2024-06-27 19:35:04,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:04,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:04,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:04,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:35:04,505 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)] === [2024-06-27 19:35:04,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash 2049491006, now seen corresponding path program 1 times [2024-06-27 19:35:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:04,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742096333] [2024-06-27 19:35:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:04,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:04,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:04,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:04,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742096333] [2024-06-27 19:35:04,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742096333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:04,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:04,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:04,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546988646] [2024-06-27 19:35:04,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:04,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:04,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:04,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:04,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:04,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:04,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 376 transitions, 4361 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:04,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:04,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:04,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:05,590 INFO L124 PetriNetUnfolderBase]: 4014/6931 cut-off events. [2024-06-27 19:35:05,590 INFO L125 PetriNetUnfolderBase]: For 816443/816443 co-relation queries the response was YES. [2024-06-27 19:35:05,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46702 conditions, 6931 events. 4014/6931 cut-off events. For 816443/816443 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49282 event pairs, 1195 based on Foata normal form. 12/6929 useless extension candidates. Maximal degree in co-relation 46568. Up to 5788 conditions per place. [2024-06-27 19:35:05,676 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 116 changer transitions 0/398 dead transitions. [2024-06-27 19:35:05,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 398 transitions, 5499 flow [2024-06-27 19:35:05,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:05,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:05,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:35:05,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-27 19:35:05,677 INFO L175 Difference]: Start difference. First operand has 278 places, 376 transitions, 4361 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:35:05,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 398 transitions, 5499 flow [2024-06-27 19:35:08,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 398 transitions, 5262 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:35:08,227 INFO L231 Difference]: Finished difference. Result has 279 places, 379 transitions, 4467 flow [2024-06-27 19:35:08,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=279, PETRI_TRANSITIONS=379} [2024-06-27 19:35:08,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 19:35:08,227 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 379 transitions, 4467 flow [2024-06-27 19:35:08,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:08,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:08,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:35:08,228 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)] === [2024-06-27 19:35:08,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:08,228 INFO L85 PathProgramCache]: Analyzing trace with hash -874916960, now seen corresponding path program 2 times [2024-06-27 19:35:08,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:08,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704992474] [2024-06-27 19:35:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:08,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:08,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:08,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:08,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704992474] [2024-06-27 19:35:08,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704992474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:08,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:08,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:08,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884008814] [2024-06-27 19:35:08,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:08,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:08,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:08,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:08,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:08,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:08,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 379 transitions, 4467 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:08,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:08,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:08,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:09,373 INFO L124 PetriNetUnfolderBase]: 4054/6995 cut-off events. [2024-06-27 19:35:09,373 INFO L125 PetriNetUnfolderBase]: For 836673/836673 co-relation queries the response was YES. [2024-06-27 19:35:09,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 6995 events. 4054/6995 cut-off events. For 836673/836673 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49811 event pairs, 1216 based on Foata normal form. 12/6993 useless extension candidates. Maximal degree in co-relation 47359. Up to 6030 conditions per place. [2024-06-27 19:35:09,458 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 106 changer transitions 0/399 dead transitions. [2024-06-27 19:35:09,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 5377 flow [2024-06-27 19:35:09,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:09,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:09,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:35:09,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:35:09,459 INFO L175 Difference]: Start difference. First operand has 279 places, 379 transitions, 4467 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:35:09,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 5377 flow [2024-06-27 19:35:11,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5184 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-27 19:35:11,993 INFO L231 Difference]: Finished difference. Result has 283 places, 381 transitions, 4565 flow [2024-06-27 19:35:11,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4565, PETRI_PLACES=283, PETRI_TRANSITIONS=381} [2024-06-27 19:35:11,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-27 19:35:11,993 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 381 transitions, 4565 flow [2024-06-27 19:35:11,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:11,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:11,993 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] [2024-06-27 19:35:11,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:35:11,993 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)] === [2024-06-27 19:35:11,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash -361022210, now seen corresponding path program 3 times [2024-06-27 19:35:11,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:11,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115416797] [2024-06-27 19:35:11,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:11,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:12,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:12,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115416797] [2024-06-27 19:35:12,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115416797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:12,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:12,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:12,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594710891] [2024-06-27 19:35:12,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:12,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:12,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:12,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:12,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:12,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:12,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 381 transitions, 4565 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:12,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:12,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:12,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:13,112 INFO L124 PetriNetUnfolderBase]: 4107/7094 cut-off events. [2024-06-27 19:35:13,113 INFO L125 PetriNetUnfolderBase]: For 863670/863670 co-relation queries the response was YES. [2024-06-27 19:35:13,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48824 conditions, 7094 events. 4107/7094 cut-off events. For 863670/863670 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50660 event pairs, 1222 based on Foata normal form. 12/7092 useless extension candidates. Maximal degree in co-relation 48687. Up to 5557 conditions per place. [2024-06-27 19:35:13,201 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 126 changer transitions 0/404 dead transitions. [2024-06-27 19:35:13,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 404 transitions, 5757 flow [2024-06-27 19:35:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:35:13,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:35:13,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:35:13,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:35:13,202 INFO L175 Difference]: Start difference. First operand has 283 places, 381 transitions, 4565 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:35:13,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 404 transitions, 5757 flow [2024-06-27 19:35:16,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 404 transitions, 5486 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:16,621 INFO L231 Difference]: Finished difference. Result has 285 places, 383 transitions, 4633 flow [2024-06-27 19:35:16,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4633, PETRI_PLACES=285, PETRI_TRANSITIONS=383} [2024-06-27 19:35:16,621 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 19:35:16,622 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 383 transitions, 4633 flow [2024-06-27 19:35:16,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:16,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:16,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:16,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:35:16,622 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)] === [2024-06-27 19:35:16,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:16,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1479748878, now seen corresponding path program 1 times [2024-06-27 19:35:16,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:16,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545532690] [2024-06-27 19:35:16,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:16,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:16,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:16,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:16,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:16,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545532690] [2024-06-27 19:35:16,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545532690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:16,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:16,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:35:16,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713387884] [2024-06-27 19:35:16,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:16,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:35:16,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:35:16,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:35:16,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:16,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 383 transitions, 4633 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:16,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:16,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:16,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:17,714 INFO L124 PetriNetUnfolderBase]: 4115/7134 cut-off events. [2024-06-27 19:35:17,714 INFO L125 PetriNetUnfolderBase]: For 827914/827914 co-relation queries the response was YES. [2024-06-27 19:35:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49104 conditions, 7134 events. 4115/7134 cut-off events. For 827914/827914 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 51047 event pairs, 1201 based on Foata normal form. 2/7132 useless extension candidates. Maximal degree in co-relation 48966. Up to 6406 conditions per place. [2024-06-27 19:35:17,804 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 354 selfloop transitions, 39 changer transitions 0/402 dead transitions. [2024-06-27 19:35:17,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 402 transitions, 5523 flow [2024-06-27 19:35:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:35:17,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:35:17,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-27 19:35:17,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:35:17,805 INFO L175 Difference]: Start difference. First operand has 285 places, 383 transitions, 4633 flow. Second operand 6 states and 156 transitions. [2024-06-27 19:35:17,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 402 transitions, 5523 flow [2024-06-27 19:35:20,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 402 transitions, 5323 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:20,911 INFO L231 Difference]: Finished difference. Result has 287 places, 385 transitions, 4582 flow [2024-06-27 19:35:20,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4582, PETRI_PLACES=287, PETRI_TRANSITIONS=385} [2024-06-27 19:35:20,912 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-27 19:35:20,912 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 385 transitions, 4582 flow [2024-06-27 19:35:20,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:20,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:20,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:20,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:35:20,912 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)] === [2024-06-27 19:35:20,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:20,913 INFO L85 PathProgramCache]: Analyzing trace with hash -474472802, now seen corresponding path program 2 times [2024-06-27 19:35:20,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:20,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384726798] [2024-06-27 19:35:20,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:20,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:20,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:20,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384726798] [2024-06-27 19:35:20,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384726798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:20,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:20,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:35:20,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227254460] [2024-06-27 19:35:20,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:20,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:35:20,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:20,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:35:20,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:35:20,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:20,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 385 transitions, 4582 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:20,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:20,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:20,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:22,107 INFO L124 PetriNetUnfolderBase]: 4136/7169 cut-off events. [2024-06-27 19:35:22,107 INFO L125 PetriNetUnfolderBase]: For 850832/850832 co-relation queries the response was YES. [2024-06-27 19:35:22,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49488 conditions, 7169 events. 4136/7169 cut-off events. For 850832/850832 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51355 event pairs, 1202 based on Foata normal form. 2/7167 useless extension candidates. Maximal degree in co-relation 49349. Up to 6392 conditions per place. [2024-06-27 19:35:22,209 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 351 selfloop transitions, 45 changer transitions 0/405 dead transitions. [2024-06-27 19:35:22,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 405 transitions, 5748 flow [2024-06-27 19:35:22,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:35:22,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:35:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-27 19:35:22,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:35:22,210 INFO L175 Difference]: Start difference. First operand has 287 places, 385 transitions, 4582 flow. Second operand 6 states and 153 transitions. [2024-06-27 19:35:22,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 405 transitions, 5748 flow [2024-06-27 19:35:25,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 405 transitions, 5621 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:25,394 INFO L231 Difference]: Finished difference. Result has 289 places, 389 transitions, 4687 flow [2024-06-27 19:35:25,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4687, PETRI_PLACES=289, PETRI_TRANSITIONS=389} [2024-06-27 19:35:25,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 19:35:25,394 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 389 transitions, 4687 flow [2024-06-27 19:35:25,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:25,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:25,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:25,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:35:25,394 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)] === [2024-06-27 19:35:25,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:25,395 INFO L85 PathProgramCache]: Analyzing trace with hash 965290846, now seen corresponding path program 3 times [2024-06-27 19:35:25,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:25,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444363434] [2024-06-27 19:35:25,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:25,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:25,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:25,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444363434] [2024-06-27 19:35:25,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444363434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:25,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:25,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:35:25,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781699552] [2024-06-27 19:35:25,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:25,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:35:25,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:25,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:35:25,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:35:25,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:25,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 389 transitions, 4687 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:25,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:25,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:25,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:26,544 INFO L124 PetriNetUnfolderBase]: 4131/7161 cut-off events. [2024-06-27 19:35:26,544 INFO L125 PetriNetUnfolderBase]: For 856187/856187 co-relation queries the response was YES. [2024-06-27 19:35:26,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49336 conditions, 7161 events. 4131/7161 cut-off events. For 856187/856187 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 51273 event pairs, 1199 based on Foata normal form. 2/7156 useless extension candidates. Maximal degree in co-relation 49196. Up to 6430 conditions per place. [2024-06-27 19:35:26,639 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 360 selfloop transitions, 40 changer transitions 0/409 dead transitions. [2024-06-27 19:35:26,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 409 transitions, 5537 flow [2024-06-27 19:35:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:35:26,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:35:26,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-27 19:35:26,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 19:35:26,640 INFO L175 Difference]: Start difference. First operand has 289 places, 389 transitions, 4687 flow. Second operand 6 states and 159 transitions. [2024-06-27 19:35:26,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 409 transitions, 5537 flow [2024-06-27 19:35:30,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 409 transitions, 5395 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-27 19:35:30,201 INFO L231 Difference]: Finished difference. Result has 293 places, 389 transitions, 4630 flow [2024-06-27 19:35:30,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4630, PETRI_PLACES=293, PETRI_TRANSITIONS=389} [2024-06-27 19:35:30,201 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 19:35:30,201 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 389 transitions, 4630 flow [2024-06-27 19:35:30,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:30,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:30,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:30,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:35:30,201 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)] === [2024-06-27 19:35:30,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:30,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1250681054, now seen corresponding path program 4 times [2024-06-27 19:35:30,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:30,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899306703] [2024-06-27 19:35:30,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:30,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:30,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:30,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899306703] [2024-06-27 19:35:30,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899306703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:30,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:30,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:35:30,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791443522] [2024-06-27 19:35:30,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:30,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:35:30,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:30,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:35:30,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:35:30,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:30,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 389 transitions, 4630 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:30,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:30,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:30,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:31,303 INFO L124 PetriNetUnfolderBase]: 4139/7173 cut-off events. [2024-06-27 19:35:31,303 INFO L125 PetriNetUnfolderBase]: For 871315/871315 co-relation queries the response was YES. [2024-06-27 19:35:31,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49606 conditions, 7173 events. 4139/7173 cut-off events. For 871315/871315 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51401 event pairs, 1195 based on Foata normal form. 2/7168 useless extension candidates. Maximal degree in co-relation 49464. Up to 6416 conditions per place. [2024-06-27 19:35:31,390 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 357 selfloop transitions, 43 changer transitions 0/409 dead transitions. [2024-06-27 19:35:31,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 409 transitions, 5544 flow [2024-06-27 19:35:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:35:31,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:35:31,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-27 19:35:31,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-27 19:35:31,391 INFO L175 Difference]: Start difference. First operand has 293 places, 389 transitions, 4630 flow. Second operand 6 states and 155 transitions. [2024-06-27 19:35:31,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 409 transitions, 5544 flow [2024-06-27 19:35:35,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 409 transitions, 5441 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:35,361 INFO L231 Difference]: Finished difference. Result has 294 places, 391 transitions, 4692 flow [2024-06-27 19:35:35,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4692, PETRI_PLACES=294, PETRI_TRANSITIONS=391} [2024-06-27 19:35:35,361 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 19:35:35,361 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 391 transitions, 4692 flow [2024-06-27 19:35:35,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:35,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:35,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:35,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:35:35,362 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)] === [2024-06-27 19:35:35,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:35,362 INFO L85 PathProgramCache]: Analyzing trace with hash -449911168, now seen corresponding path program 5 times [2024-06-27 19:35:35,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:35,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514308679] [2024-06-27 19:35:35,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:35,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:35,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:35,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514308679] [2024-06-27 19:35:35,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514308679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:35,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:35,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:35:35,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150122836] [2024-06-27 19:35:35,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:35,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:35:35,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:35,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:35:35,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:35:35,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:35,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 391 transitions, 4692 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:35,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:35,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:35,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:36,505 INFO L124 PetriNetUnfolderBase]: 4147/7187 cut-off events. [2024-06-27 19:35:36,505 INFO L125 PetriNetUnfolderBase]: For 889813/889813 co-relation queries the response was YES. [2024-06-27 19:35:36,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49959 conditions, 7187 events. 4147/7187 cut-off events. For 889813/889813 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51604 event pairs, 1181 based on Foata normal form. 2/7180 useless extension candidates. Maximal degree in co-relation 49816. Up to 6317 conditions per place. [2024-06-27 19:35:36,596 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 347 selfloop transitions, 52 changer transitions 0/408 dead transitions. [2024-06-27 19:35:36,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 408 transitions, 5847 flow [2024-06-27 19:35:36,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:35:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:35:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-27 19:35:36,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-27 19:35:36,597 INFO L175 Difference]: Start difference. First operand has 294 places, 391 transitions, 4692 flow. Second operand 6 states and 149 transitions. [2024-06-27 19:35:36,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 408 transitions, 5847 flow [2024-06-27 19:35:40,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 408 transitions, 5704 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:40,224 INFO L231 Difference]: Finished difference. Result has 296 places, 394 transitions, 4775 flow [2024-06-27 19:35:40,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4775, PETRI_PLACES=296, PETRI_TRANSITIONS=394} [2024-06-27 19:35:40,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 19:35:40,224 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 394 transitions, 4775 flow [2024-06-27 19:35:40,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:40,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:40,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:40,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:35:40,225 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)] === [2024-06-27 19:35:40,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:40,225 INFO L85 PathProgramCache]: Analyzing trace with hash -470304464, now seen corresponding path program 6 times [2024-06-27 19:35:40,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:40,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705557449] [2024-06-27 19:35:40,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:40,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:40,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:40,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:40,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705557449] [2024-06-27 19:35:40,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705557449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:40,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:40,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:35:40,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592695375] [2024-06-27 19:35:40,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:40,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:35:40,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:40,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:35:40,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:35:40,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:40,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 394 transitions, 4775 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:40,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:40,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:40,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:41,507 INFO L124 PetriNetUnfolderBase]: 4142/7180 cut-off events. [2024-06-27 19:35:41,507 INFO L125 PetriNetUnfolderBase]: For 894397/894397 co-relation queries the response was YES. [2024-06-27 19:35:41,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49796 conditions, 7180 events. 4142/7180 cut-off events. For 894397/894397 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51611 event pairs, 1181 based on Foata normal form. 2/7173 useless extension candidates. Maximal degree in co-relation 49652. Up to 6313 conditions per place. [2024-06-27 19:35:41,586 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 345 selfloop transitions, 53 changer transitions 0/407 dead transitions. [2024-06-27 19:35:41,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 407 transitions, 5601 flow [2024-06-27 19:35:41,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:35:41,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:35:41,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-27 19:35:41,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-27 19:35:41,587 INFO L175 Difference]: Start difference. First operand has 296 places, 394 transitions, 4775 flow. Second operand 6 states and 148 transitions. [2024-06-27 19:35:41,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 407 transitions, 5601 flow [2024-06-27 19:35:44,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 407 transitions, 5400 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-27 19:35:44,655 INFO L231 Difference]: Finished difference. Result has 299 places, 394 transitions, 4685 flow [2024-06-27 19:35:44,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4685, PETRI_PLACES=299, PETRI_TRANSITIONS=394} [2024-06-27 19:35:44,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-27 19:35:44,655 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 394 transitions, 4685 flow [2024-06-27 19:35:44,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-27 19:35:44,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:44,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:44,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:35:44,655 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)] === [2024-06-27 19:35:44,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:44,656 INFO L85 PathProgramCache]: Analyzing trace with hash -883442012, now seen corresponding path program 1 times [2024-06-27 19:35:44,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:44,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135283733] [2024-06-27 19:35:44,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:44,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:44,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:44,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:44,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135283733] [2024-06-27 19:35:44,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135283733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:44,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:44,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:44,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423951963] [2024-06-27 19:35:44,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:44,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:44,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:44,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:44,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 394 transitions, 4685 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:44,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:44,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:44,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:45,940 INFO L124 PetriNetUnfolderBase]: 4340/7504 cut-off events. [2024-06-27 19:35:45,940 INFO L125 PetriNetUnfolderBase]: For 1119503/1119503 co-relation queries the response was YES. [2024-06-27 19:35:46,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55044 conditions, 7504 events. 4340/7504 cut-off events. For 1119503/1119503 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 54117 event pairs, 1059 based on Foata normal form. 12/7512 useless extension candidates. Maximal degree in co-relation 54899. Up to 5948 conditions per place. [2024-06-27 19:35:46,046 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 93 changer transitions 0/435 dead transitions. [2024-06-27 19:35:46,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 435 transitions, 6325 flow [2024-06-27 19:35:46,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:35:46,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:35:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-27 19:35:46,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-27 19:35:46,047 INFO L175 Difference]: Start difference. First operand has 299 places, 394 transitions, 4685 flow. Second operand 9 states and 235 transitions. [2024-06-27 19:35:46,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 435 transitions, 6325 flow [2024-06-27 19:35:49,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 435 transitions, 6204 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 19:35:49,478 INFO L231 Difference]: Finished difference. Result has 304 places, 399 transitions, 4939 flow [2024-06-27 19:35:49,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4939, PETRI_PLACES=304, PETRI_TRANSITIONS=399} [2024-06-27 19:35:49,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-27 19:35:49,479 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 399 transitions, 4939 flow [2024-06-27 19:35:49,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:49,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:49,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:49,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:35:49,479 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)] === [2024-06-27 19:35:49,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:49,479 INFO L85 PathProgramCache]: Analyzing trace with hash -637524926, now seen corresponding path program 2 times [2024-06-27 19:35:49,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:49,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43837105] [2024-06-27 19:35:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:49,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:49,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:49,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43837105] [2024-06-27 19:35:49,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43837105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:49,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:49,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:49,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179064564] [2024-06-27 19:35:49,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:49,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:49,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:49,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:49,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:49,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:49,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 399 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:49,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:49,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:49,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:50,796 INFO L124 PetriNetUnfolderBase]: 4387/7602 cut-off events. [2024-06-27 19:35:50,796 INFO L125 PetriNetUnfolderBase]: For 1144741/1144741 co-relation queries the response was YES. [2024-06-27 19:35:50,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 7602 events. 4387/7602 cut-off events. For 1144741/1144741 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55071 event pairs, 1276 based on Foata normal form. 12/7610 useless extension candidates. Maximal degree in co-relation 56146. Up to 6472 conditions per place. [2024-06-27 19:35:50,913 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 82 changer transitions 0/429 dead transitions. [2024-06-27 19:35:50,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 429 transitions, 6223 flow [2024-06-27 19:35:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:50,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:35:50,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-27 19:35:50,914 INFO L175 Difference]: Start difference. First operand has 304 places, 399 transitions, 4939 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:35:50,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 429 transitions, 6223 flow [2024-06-27 19:35:54,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 429 transitions, 6058 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-27 19:35:54,103 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 5078 flow [2024-06-27 19:35:54,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5078, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-27 19:35:54,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 19:35:54,103 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 5078 flow [2024-06-27 19:35:54,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:54,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:54,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:54,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:35:54,103 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)] === [2024-06-27 19:35:54,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:54,104 INFO L85 PathProgramCache]: Analyzing trace with hash 319267840, now seen corresponding path program 3 times [2024-06-27 19:35:54,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:54,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312367250] [2024-06-27 19:35:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:54,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:54,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:54,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:54,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312367250] [2024-06-27 19:35:54,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312367250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:54,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:54,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:35:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538746351] [2024-06-27 19:35:54,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:54,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:35:54,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:54,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:35:54,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:35:54,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:54,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 5078 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:54,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:54,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:54,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:35:55,491 INFO L124 PetriNetUnfolderBase]: 4397/7620 cut-off events. [2024-06-27 19:35:55,492 INFO L125 PetriNetUnfolderBase]: For 1148058/1148058 co-relation queries the response was YES. [2024-06-27 19:35:55,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55736 conditions, 7620 events. 4397/7620 cut-off events. For 1148058/1148058 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 55221 event pairs, 1287 based on Foata normal form. 16/7632 useless extension candidates. Maximal degree in co-relation 55586. Up to 6648 conditions per place. [2024-06-27 19:35:55,584 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 85 changer transitions 0/426 dead transitions. [2024-06-27 19:35:55,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 426 transitions, 6039 flow [2024-06-27 19:35:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:35:55,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:35:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:35:55,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:35:55,585 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 5078 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:35:55,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 426 transitions, 6039 flow [2024-06-27 19:35:59,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 426 transitions, 5738 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:35:59,693 INFO L231 Difference]: Finished difference. Result has 310 places, 404 transitions, 5018 flow [2024-06-27 19:35:59,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5018, PETRI_PLACES=310, PETRI_TRANSITIONS=404} [2024-06-27 19:35:59,694 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-27 19:35:59,694 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 404 transitions, 5018 flow [2024-06-27 19:35:59,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:59,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:35:59,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:35:59,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:35:59,694 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)] === [2024-06-27 19:35:59,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:35:59,694 INFO L85 PathProgramCache]: Analyzing trace with hash -529030820, now seen corresponding path program 4 times [2024-06-27 19:35:59,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:35:59,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906299953] [2024-06-27 19:35:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:35:59,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:35:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:35:59,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:35:59,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:35:59,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906299953] [2024-06-27 19:35:59,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906299953] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:35:59,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:35:59,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:35:59,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053862912] [2024-06-27 19:35:59,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:35:59,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:35:59,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:35:59,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:35:59,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:35:59,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:35:59,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 404 transitions, 5018 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:35:59,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:35:59,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:35:59,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:01,000 INFO L124 PetriNetUnfolderBase]: 4453/7696 cut-off events. [2024-06-27 19:36:01,000 INFO L125 PetriNetUnfolderBase]: For 1167720/1167720 co-relation queries the response was YES. [2024-06-27 19:36:01,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55836 conditions, 7696 events. 4453/7696 cut-off events. For 1167720/1167720 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55887 event pairs, 1332 based on Foata normal form. 16/7694 useless extension candidates. Maximal degree in co-relation 55686. Up to 6736 conditions per place. [2024-06-27 19:36:01,110 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 91 changer transitions 0/421 dead transitions. [2024-06-27 19:36:01,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 421 transitions, 5950 flow [2024-06-27 19:36:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:01,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:36:01,111 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-27 19:36:01,111 INFO L175 Difference]: Start difference. First operand has 310 places, 404 transitions, 5018 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:36:01,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 421 transitions, 5950 flow [2024-06-27 19:36:05,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 421 transitions, 5740 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:36:05,753 INFO L231 Difference]: Finished difference. Result has 311 places, 406 transitions, 5060 flow [2024-06-27 19:36:05,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5060, PETRI_PLACES=311, PETRI_TRANSITIONS=406} [2024-06-27 19:36:05,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 19:36:05,754 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 406 transitions, 5060 flow [2024-06-27 19:36:05,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:05,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:05,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:05,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:36:05,754 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)] === [2024-06-27 19:36:05,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:05,754 INFO L85 PathProgramCache]: Analyzing trace with hash -675823550, now seen corresponding path program 5 times [2024-06-27 19:36:05,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:05,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626405451] [2024-06-27 19:36:05,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:05,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:05,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:05,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:05,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:05,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626405451] [2024-06-27 19:36:05,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626405451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:05,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:05,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:05,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789287610] [2024-06-27 19:36:05,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:05,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:05,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:05,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:05,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:05,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:05,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 406 transitions, 5060 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:05,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:05,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:05,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:07,098 INFO L124 PetriNetUnfolderBase]: 4509/7792 cut-off events. [2024-06-27 19:36:07,098 INFO L125 PetriNetUnfolderBase]: For 1186094/1186094 co-relation queries the response was YES. [2024-06-27 19:36:07,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56461 conditions, 7792 events. 4509/7792 cut-off events. For 1186094/1186094 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56696 event pairs, 1346 based on Foata normal form. 16/7790 useless extension candidates. Maximal degree in co-relation 56310. Up to 6824 conditions per place. [2024-06-27 19:36:07,209 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 83 changer transitions 0/423 dead transitions. [2024-06-27 19:36:07,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 423 transitions, 6000 flow [2024-06-27 19:36:07,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:07,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:07,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:36:07,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-27 19:36:07,210 INFO L175 Difference]: Start difference. First operand has 311 places, 406 transitions, 5060 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:36:07,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 423 transitions, 6000 flow [2024-06-27 19:36:11,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 423 transitions, 5770 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:11,688 INFO L231 Difference]: Finished difference. Result has 313 places, 408 transitions, 5070 flow [2024-06-27 19:36:11,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5070, PETRI_PLACES=313, PETRI_TRANSITIONS=408} [2024-06-27 19:36:11,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-27 19:36:11,688 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 408 transitions, 5070 flow [2024-06-27 19:36:11,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:11,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:11,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:11,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:36:11,689 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)] === [2024-06-27 19:36:11,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:11,689 INFO L85 PathProgramCache]: Analyzing trace with hash -675971420, now seen corresponding path program 6 times [2024-06-27 19:36:11,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:11,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834414325] [2024-06-27 19:36:11,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:11,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:11,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:11,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:11,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834414325] [2024-06-27 19:36:11,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834414325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:11,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:11,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:11,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828806582] [2024-06-27 19:36:11,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:11,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:11,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:11,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:11,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 408 transitions, 5070 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:11,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:11,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:11,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:12,978 INFO L124 PetriNetUnfolderBase]: 4576/7891 cut-off events. [2024-06-27 19:36:12,979 INFO L125 PetriNetUnfolderBase]: For 1209121/1209121 co-relation queries the response was YES. [2024-06-27 19:36:13,064 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57629 conditions, 7891 events. 4576/7891 cut-off events. For 1209121/1209121 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 57446 event pairs, 1340 based on Foata normal form. 12/7885 useless extension candidates. Maximal degree in co-relation 57477. Up to 6691 conditions per place. [2024-06-27 19:36:13,090 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 83 changer transitions 0/431 dead transitions. [2024-06-27 19:36:13,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 431 transitions, 6364 flow [2024-06-27 19:36:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:13,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:13,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:36:13,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 19:36:13,091 INFO L175 Difference]: Start difference. First operand has 313 places, 408 transitions, 5070 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:36:13,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 431 transitions, 6364 flow [2024-06-27 19:36:16,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 431 transitions, 6148 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:16,798 INFO L231 Difference]: Finished difference. Result has 316 places, 412 transitions, 5210 flow [2024-06-27 19:36:16,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5210, PETRI_PLACES=316, PETRI_TRANSITIONS=412} [2024-06-27 19:36:16,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-27 19:36:16,798 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 412 transitions, 5210 flow [2024-06-27 19:36:16,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:16,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:16,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:16,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:36:16,798 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)] === [2024-06-27 19:36:16,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:16,799 INFO L85 PathProgramCache]: Analyzing trace with hash -468897248, now seen corresponding path program 1 times [2024-06-27 19:36:16,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:16,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451744004] [2024-06-27 19:36:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:16,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:16,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:16,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451744004] [2024-06-27 19:36:16,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451744004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:16,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:16,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:16,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033300320] [2024-06-27 19:36:16,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:16,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:16,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:16,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:16,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:16,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:16,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 412 transitions, 5210 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:16,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:16,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:16,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:18,103 INFO L124 PetriNetUnfolderBase]: 4616/7977 cut-off events. [2024-06-27 19:36:18,103 INFO L125 PetriNetUnfolderBase]: For 1235234/1235234 co-relation queries the response was YES. [2024-06-27 19:36:18,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58196 conditions, 7977 events. 4616/7977 cut-off events. For 1235234/1235234 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 58249 event pairs, 1323 based on Foata normal form. 12/7971 useless extension candidates. Maximal degree in co-relation 58042. Up to 6797 conditions per place. [2024-06-27 19:36:18,212 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 100 changer transitions 0/432 dead transitions. [2024-06-27 19:36:18,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 432 transitions, 6188 flow [2024-06-27 19:36:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:18,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:36:18,213 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:36:18,213 INFO L175 Difference]: Start difference. First operand has 316 places, 412 transitions, 5210 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:36:18,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 432 transitions, 6188 flow [2024-06-27 19:36:22,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 6013 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-27 19:36:22,387 INFO L231 Difference]: Finished difference. Result has 320 places, 414 transitions, 5316 flow [2024-06-27 19:36:22,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5316, PETRI_PLACES=320, PETRI_TRANSITIONS=414} [2024-06-27 19:36:22,387 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 19:36:22,387 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 414 transitions, 5316 flow [2024-06-27 19:36:22,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:22,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:22,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:22,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:36:22,388 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)] === [2024-06-27 19:36:22,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:22,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1288097676, now seen corresponding path program 7 times [2024-06-27 19:36:22,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:22,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482119321] [2024-06-27 19:36:22,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:22,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:22,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:22,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:22,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482119321] [2024-06-27 19:36:22,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482119321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:22,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:22,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:22,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063661298] [2024-06-27 19:36:22,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:22,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:22,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:22,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:22,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:22,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:22,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 414 transitions, 5316 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:22,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:22,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:22,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:23,836 INFO L124 PetriNetUnfolderBase]: 4656/8038 cut-off events. [2024-06-27 19:36:23,836 INFO L125 PetriNetUnfolderBase]: For 1251916/1251916 co-relation queries the response was YES. [2024-06-27 19:36:23,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58597 conditions, 8038 events. 4656/8038 cut-off events. For 1251916/1251916 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 58675 event pairs, 1142 based on Foata normal form. 12/8046 useless extension candidates. Maximal degree in co-relation 58441. Up to 6704 conditions per place. [2024-06-27 19:36:23,946 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 92 changer transitions 2/444 dead transitions. [2024-06-27 19:36:23,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 444 transitions, 6529 flow [2024-06-27 19:36:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-27 19:36:23,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 19:36:23,947 INFO L175 Difference]: Start difference. First operand has 320 places, 414 transitions, 5316 flow. Second operand 7 states and 189 transitions. [2024-06-27 19:36:23,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 444 transitions, 6529 flow [2024-06-27 19:36:27,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 444 transitions, 6268 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:27,639 INFO L231 Difference]: Finished difference. Result has 322 places, 414 transitions, 5258 flow [2024-06-27 19:36:27,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5258, PETRI_PLACES=322, PETRI_TRANSITIONS=414} [2024-06-27 19:36:27,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-27 19:36:27,639 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 414 transitions, 5258 flow [2024-06-27 19:36:27,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:27,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:27,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:27,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:36:27,639 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)] === [2024-06-27 19:36:27,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:27,640 INFO L85 PathProgramCache]: Analyzing trace with hash -681390176, now seen corresponding path program 8 times [2024-06-27 19:36:27,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:27,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802442658] [2024-06-27 19:36:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:27,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:27,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:27,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802442658] [2024-06-27 19:36:27,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802442658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:27,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:27,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:27,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280962084] [2024-06-27 19:36:27,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:27,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:27,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:27,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:27,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:27,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:27,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 414 transitions, 5258 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:27,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:27,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:27,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:29,198 INFO L124 PetriNetUnfolderBase]: 4688/8075 cut-off events. [2024-06-27 19:36:29,198 INFO L125 PetriNetUnfolderBase]: For 1297622/1297622 co-relation queries the response was YES. [2024-06-27 19:36:29,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58739 conditions, 8075 events. 4688/8075 cut-off events. For 1297622/1297622 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58857 event pairs, 1346 based on Foata normal form. 16/8087 useless extension candidates. Maximal degree in co-relation 58582. Up to 7113 conditions per place. [2024-06-27 19:36:29,294 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 81 changer transitions 2/437 dead transitions. [2024-06-27 19:36:29,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 437 transitions, 6209 flow [2024-06-27 19:36:29,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:29,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:36:29,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-27 19:36:29,295 INFO L175 Difference]: Start difference. First operand has 322 places, 414 transitions, 5258 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:36:29,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 437 transitions, 6209 flow [2024-06-27 19:36:33,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 437 transitions, 6047 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-27 19:36:33,371 INFO L231 Difference]: Finished difference. Result has 325 places, 414 transitions, 5276 flow [2024-06-27 19:36:33,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5276, PETRI_PLACES=325, PETRI_TRANSITIONS=414} [2024-06-27 19:36:33,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 19:36:33,372 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 414 transitions, 5276 flow [2024-06-27 19:36:33,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:33,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:33,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:33,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:36:33,372 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)] === [2024-06-27 19:36:33,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash -482088386, now seen corresponding path program 9 times [2024-06-27 19:36:33,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:33,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918709194] [2024-06-27 19:36:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:33,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:33,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918709194] [2024-06-27 19:36:33,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918709194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:33,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849082719] [2024-06-27 19:36:33,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:33,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:33,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:33,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:33,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:33,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 414 transitions, 5276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:33,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:33,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:33,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:34,749 INFO L124 PetriNetUnfolderBase]: 4711/8110 cut-off events. [2024-06-27 19:36:34,749 INFO L125 PetriNetUnfolderBase]: For 1320058/1320058 co-relation queries the response was YES. [2024-06-27 19:36:34,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59035 conditions, 8110 events. 4711/8110 cut-off events. For 1320058/1320058 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 59120 event pairs, 1350 based on Foata normal form. 16/8122 useless extension candidates. Maximal degree in co-relation 58877. Up to 7153 conditions per place. [2024-06-27 19:36:34,861 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 81 changer transitions 1/434 dead transitions. [2024-06-27 19:36:34,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 434 transitions, 6216 flow [2024-06-27 19:36:34,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:36:34,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-27 19:36:34,861 INFO L175 Difference]: Start difference. First operand has 325 places, 414 transitions, 5276 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:36:34,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 434 transitions, 6216 flow [2024-06-27 19:36:38,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 434 transitions, 6051 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:38,741 INFO L231 Difference]: Finished difference. Result has 327 places, 415 transitions, 5300 flow [2024-06-27 19:36:38,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5111, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5300, PETRI_PLACES=327, PETRI_TRANSITIONS=415} [2024-06-27 19:36:38,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-27 19:36:38,742 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 415 transitions, 5300 flow [2024-06-27 19:36:38,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:38,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:38,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:38,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:36:38,742 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)] === [2024-06-27 19:36:38,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:38,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1201765852, now seen corresponding path program 10 times [2024-06-27 19:36:38,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:38,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235859295] [2024-06-27 19:36:38,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:38,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:38,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:38,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235859295] [2024-06-27 19:36:38,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235859295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:38,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:38,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:38,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283825205] [2024-06-27 19:36:38,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:38,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:38,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:38,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:38,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:38,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:38,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 415 transitions, 5300 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:38,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:38,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:38,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:40,269 INFO L124 PetriNetUnfolderBase]: 4627/7949 cut-off events. [2024-06-27 19:36:40,269 INFO L125 PetriNetUnfolderBase]: For 1231526/1231526 co-relation queries the response was YES. [2024-06-27 19:36:40,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56647 conditions, 7949 events. 4627/7949 cut-off events. For 1231526/1231526 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 57780 event pairs, 1331 based on Foata normal form. 16/7952 useless extension candidates. Maximal degree in co-relation 56488. Up to 7021 conditions per place. [2024-06-27 19:36:40,369 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 86 changer transitions 1/430 dead transitions. [2024-06-27 19:36:40,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 430 transitions, 6190 flow [2024-06-27 19:36:40,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:40,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:40,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-27 19:36:40,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-27 19:36:40,370 INFO L175 Difference]: Start difference. First operand has 327 places, 415 transitions, 5300 flow. Second operand 7 states and 173 transitions. [2024-06-27 19:36:40,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 430 transitions, 6190 flow [2024-06-27 19:36:44,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 430 transitions, 6021 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:44,764 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 5292 flow [2024-06-27 19:36:44,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5292, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-27 19:36:44,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 19:36:44,764 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 5292 flow [2024-06-27 19:36:44,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:44,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:44,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:44,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:36:44,764 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)] === [2024-06-27 19:36:44,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:44,765 INFO L85 PathProgramCache]: Analyzing trace with hash -474463874, now seen corresponding path program 2 times [2024-06-27 19:36:44,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:44,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960647422] [2024-06-27 19:36:44,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:44,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:44,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:44,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960647422] [2024-06-27 19:36:44,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960647422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:44,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:44,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:44,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975690928] [2024-06-27 19:36:44,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:44,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:44,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:44,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:44,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:44,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:44,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 5292 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:44,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:44,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:44,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:46,258 INFO L124 PetriNetUnfolderBase]: 4555/7850 cut-off events. [2024-06-27 19:36:46,258 INFO L125 PetriNetUnfolderBase]: For 1225924/1225924 co-relation queries the response was YES. [2024-06-27 19:36:46,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56652 conditions, 7850 events. 4555/7850 cut-off events. For 1225924/1225924 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 56934 event pairs, 1250 based on Foata normal form. 12/7858 useless extension candidates. Maximal degree in co-relation 56492. Up to 6817 conditions per place. [2024-06-27 19:36:46,357 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 86 changer transitions 0/437 dead transitions. [2024-06-27 19:36:46,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 437 transitions, 6292 flow [2024-06-27 19:36:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:46,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:36:46,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-27 19:36:46,357 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 5292 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:36:46,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 437 transitions, 6292 flow [2024-06-27 19:36:50,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 437 transitions, 6044 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:36:50,495 INFO L231 Difference]: Finished difference. Result has 329 places, 416 transitions, 5301 flow [2024-06-27 19:36:50,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5301, PETRI_PLACES=329, PETRI_TRANSITIONS=416} [2024-06-27 19:36:50,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 19:36:50,496 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 416 transitions, 5301 flow [2024-06-27 19:36:50,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:50,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:50,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:50,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:36:50,497 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)] === [2024-06-27 19:36:50,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:50,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1209390364, now seen corresponding path program 3 times [2024-06-27 19:36:50,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:50,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870420976] [2024-06-27 19:36:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:50,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:50,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:50,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:50,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:50,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870420976] [2024-06-27 19:36:50,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870420976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:50,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:50,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:50,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485372691] [2024-06-27 19:36:50,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:50,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:50,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:50,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:50,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:50,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:50,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 416 transitions, 5301 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:50,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:50,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:50,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:51,923 INFO L124 PetriNetUnfolderBase]: 4595/7905 cut-off events. [2024-06-27 19:36:51,923 INFO L125 PetriNetUnfolderBase]: For 1249873/1249873 co-relation queries the response was YES. [2024-06-27 19:36:52,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57247 conditions, 7905 events. 4595/7905 cut-off events. For 1249873/1249873 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 57472 event pairs, 1291 based on Foata normal form. 12/7904 useless extension candidates. Maximal degree in co-relation 57086. Up to 6913 conditions per place. [2024-06-27 19:36:52,043 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 337 selfloop transitions, 90 changer transitions 0/436 dead transitions. [2024-06-27 19:36:52,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 436 transitions, 6295 flow [2024-06-27 19:36:52,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:52,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:36:52,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-27 19:36:52,045 INFO L175 Difference]: Start difference. First operand has 329 places, 416 transitions, 5301 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:36:52,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 436 transitions, 6295 flow [2024-06-27 19:36:57,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 436 transitions, 6058 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:36:57,084 INFO L231 Difference]: Finished difference. Result has 331 places, 418 transitions, 5333 flow [2024-06-27 19:36:57,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5333, PETRI_PLACES=331, PETRI_TRANSITIONS=418} [2024-06-27 19:36:57,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-27 19:36:57,084 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 418 transitions, 5333 flow [2024-06-27 19:36:57,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:57,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:36:57,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:36:57,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:36:57,085 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)] === [2024-06-27 19:36:57,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:36:57,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1771250972, now seen corresponding path program 4 times [2024-06-27 19:36:57,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:36:57,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367881105] [2024-06-27 19:36:57,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:36:57,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:36:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:36:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:36:57,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:36:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367881105] [2024-06-27 19:36:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367881105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:36:57,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:36:57,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:36:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761142427] [2024-06-27 19:36:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:36:57,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:36:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:36:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:36:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:36:57,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:36:57,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 418 transitions, 5333 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:36:57,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:36:57,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:36:57,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:36:58,566 INFO L124 PetriNetUnfolderBase]: 4602/7940 cut-off events. [2024-06-27 19:36:58,566 INFO L125 PetriNetUnfolderBase]: For 1225031/1225031 co-relation queries the response was YES. [2024-06-27 19:36:58,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56495 conditions, 7940 events. 4602/7940 cut-off events. For 1225031/1225031 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57890 event pairs, 1256 based on Foata normal form. 12/7939 useless extension candidates. Maximal degree in co-relation 56333. Up to 6442 conditions per place. [2024-06-27 19:36:58,671 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 110 changer transitions 0/438 dead transitions. [2024-06-27 19:36:58,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 438 transitions, 6293 flow [2024-06-27 19:36:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:36:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:36:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:36:58,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-27 19:36:58,672 INFO L175 Difference]: Start difference. First operand has 331 places, 418 transitions, 5333 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:36:58,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 438 transitions, 6293 flow [2024-06-27 19:37:03,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 438 transitions, 6044 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:03,953 INFO L231 Difference]: Finished difference. Result has 333 places, 419 transitions, 5351 flow [2024-06-27 19:37:03,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5351, PETRI_PLACES=333, PETRI_TRANSITIONS=419} [2024-06-27 19:37:03,953 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-27 19:37:03,953 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 419 transitions, 5351 flow [2024-06-27 19:37:03,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:03,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:03,953 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] [2024-06-27 19:37:03,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:37:03,953 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)] === [2024-06-27 19:37:03,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:03,954 INFO L85 PathProgramCache]: Analyzing trace with hash -276218431, now seen corresponding path program 1 times [2024-06-27 19:37:03,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:03,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534692712] [2024-06-27 19:37:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:04,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:04,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:04,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534692712] [2024-06-27 19:37:04,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534692712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:04,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:04,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:04,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555794378] [2024-06-27 19:37:04,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:04,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:04,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:04,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:04,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:04,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 419 transitions, 5351 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:04,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:04,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:04,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:05,482 INFO L124 PetriNetUnfolderBase]: 4607/7961 cut-off events. [2024-06-27 19:37:05,483 INFO L125 PetriNetUnfolderBase]: For 1159755/1159755 co-relation queries the response was YES. [2024-06-27 19:37:05,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56575 conditions, 7961 events. 4607/7961 cut-off events. For 1159755/1159755 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57987 event pairs, 1245 based on Foata normal form. 1/7960 useless extension candidates. Maximal degree in co-relation 56412. Up to 7246 conditions per place. [2024-06-27 19:37:05,586 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 27 changer transitions 0/454 dead transitions. [2024-06-27 19:37:05,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 454 transitions, 6605 flow [2024-06-27 19:37:05,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:05,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:05,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-27 19:37:05,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-27 19:37:05,587 INFO L175 Difference]: Start difference. First operand has 333 places, 419 transitions, 5351 flow. Second operand 9 states and 224 transitions. [2024-06-27 19:37:05,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 454 transitions, 6605 flow [2024-06-27 19:37:10,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 454 transitions, 6235 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:10,129 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5083 flow [2024-06-27 19:37:10,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5083, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-27 19:37:10,130 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 19:37:10,130 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5083 flow [2024-06-27 19:37:10,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:10,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:10,130 INFO 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] [2024-06-27 19:37:10,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:37:10,130 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)] === [2024-06-27 19:37:10,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 45288803, now seen corresponding path program 2 times [2024-06-27 19:37:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:10,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175716360] [2024-06-27 19:37:10,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:10,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:10,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:10,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175716360] [2024-06-27 19:37:10,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175716360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:10,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:10,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:37:10,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344361520] [2024-06-27 19:37:10,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:10,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:37:10,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:10,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:37:10,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:37:10,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:10,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5083 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:10,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:10,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:10,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:11,506 INFO L124 PetriNetUnfolderBase]: 4604/7945 cut-off events. [2024-06-27 19:37:11,506 INFO L125 PetriNetUnfolderBase]: For 1164154/1164154 co-relation queries the response was YES. [2024-06-27 19:37:11,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55345 conditions, 7945 events. 4604/7945 cut-off events. For 1164154/1164154 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57766 event pairs, 1235 based on Foata normal form. 1/7944 useless extension candidates. Maximal degree in co-relation 55183. Up to 7243 conditions per place. [2024-06-27 19:37:11,616 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2024-06-27 19:37:11,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 449 transitions, 6031 flow [2024-06-27 19:37:11,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:11,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:11,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:37:11,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 19:37:11,617 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5083 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:37:11,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 449 transitions, 6031 flow [2024-06-27 19:37:16,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 449 transitions, 5949 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-27 19:37:16,553 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5061 flow [2024-06-27 19:37:16,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5061, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-27 19:37:16,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-27 19:37:16,553 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5061 flow [2024-06-27 19:37:16,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:16,553 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:16,553 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:16,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:37:16,553 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)] === [2024-06-27 19:37:16,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:16,554 INFO L85 PathProgramCache]: Analyzing trace with hash -838574683, now seen corresponding path program 1 times [2024-06-27 19:37:16,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:16,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027746563] [2024-06-27 19:37:16,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:16,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:16,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:16,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:16,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027746563] [2024-06-27 19:37:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027746563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:16,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:16,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:16,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528961798] [2024-06-27 19:37:16,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:16,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:16,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:16,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:16,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:16,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:16,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5061 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:16,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:16,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:16,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:18,221 INFO L124 PetriNetUnfolderBase]: 4625/7950 cut-off events. [2024-06-27 19:37:18,222 INFO L125 PetriNetUnfolderBase]: For 1213861/1213861 co-relation queries the response was YES. [2024-06-27 19:37:18,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 7950 events. 4625/7950 cut-off events. For 1213861/1213861 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57738 event pairs, 1234 based on Foata normal form. 2/7923 useless extension candidates. Maximal degree in co-relation 55960. Up to 7009 conditions per place. [2024-06-27 19:37:18,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 113 changer transitions 2/459 dead transitions. [2024-06-27 19:37:18,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 459 transitions, 6495 flow [2024-06-27 19:37:18,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:18,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:18,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-27 19:37:18,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-06-27 19:37:18,324 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5061 flow. Second operand 9 states and 233 transitions. [2024-06-27 19:37:18,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 459 transitions, 6495 flow [2024-06-27 19:37:22,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 459 transitions, 6431 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:22,659 INFO L231 Difference]: Finished difference. Result has 338 places, 426 transitions, 5441 flow [2024-06-27 19:37:22,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5441, PETRI_PLACES=338, PETRI_TRANSITIONS=426} [2024-06-27 19:37:22,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-27 19:37:22,660 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 426 transitions, 5441 flow [2024-06-27 19:37:22,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:22,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:22,660 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] [2024-06-27 19:37:22,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:37:22,660 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)] === [2024-06-27 19:37:22,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash 919759199, now seen corresponding path program 2 times [2024-06-27 19:37:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:22,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950181487] [2024-06-27 19:37:22,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:22,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:22,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:22,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950181487] [2024-06-27 19:37:22,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950181487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:22,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:22,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:22,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253212272] [2024-06-27 19:37:22,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:22,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:22,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:22,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:22,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:22,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:22,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 426 transitions, 5441 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:22,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:22,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:22,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:24,380 INFO L124 PetriNetUnfolderBase]: 4620/7953 cut-off events. [2024-06-27 19:37:24,380 INFO L125 PetriNetUnfolderBase]: For 1216298/1216298 co-relation queries the response was YES. [2024-06-27 19:37:24,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56375 conditions, 7953 events. 4620/7953 cut-off events. For 1216298/1216298 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 57842 event pairs, 1259 based on Foata normal form. 2/7938 useless extension candidates. Maximal degree in co-relation 56211. Up to 7059 conditions per place. [2024-06-27 19:37:24,486 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 108 changer transitions 0/451 dead transitions. [2024-06-27 19:37:24,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 451 transitions, 6387 flow [2024-06-27 19:37:24,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:24,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-27 19:37:24,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-27 19:37:24,487 INFO L175 Difference]: Start difference. First operand has 338 places, 426 transitions, 5441 flow. Second operand 8 states and 206 transitions. [2024-06-27 19:37:24,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 451 transitions, 6387 flow [2024-06-27 19:37:30,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 6078 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-27 19:37:30,010 INFO L231 Difference]: Finished difference. Result has 341 places, 426 transitions, 5353 flow [2024-06-27 19:37:30,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5353, PETRI_PLACES=341, PETRI_TRANSITIONS=426} [2024-06-27 19:37:30,011 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-27 19:37:30,011 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 426 transitions, 5353 flow [2024-06-27 19:37:30,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:30,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:30,011 INFO 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] [2024-06-27 19:37:30,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:37:30,012 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)] === [2024-06-27 19:37:30,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:30,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1025612251, now seen corresponding path program 3 times [2024-06-27 19:37:30,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:30,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748527867] [2024-06-27 19:37:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:30,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:30,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748527867] [2024-06-27 19:37:30,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748527867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:30,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:30,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:30,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343708540] [2024-06-27 19:37:30,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:30,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:30,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:30,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 426 transitions, 5353 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:30,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:30,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:30,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:31,744 INFO L124 PetriNetUnfolderBase]: 4628/7971 cut-off events. [2024-06-27 19:37:31,744 INFO L125 PetriNetUnfolderBase]: For 1238710/1238710 co-relation queries the response was YES. [2024-06-27 19:37:31,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56686 conditions, 7971 events. 4628/7971 cut-off events. For 1238710/1238710 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57993 event pairs, 1263 based on Foata normal form. 2/7958 useless extension candidates. Maximal degree in co-relation 56520. Up to 7071 conditions per place. [2024-06-27 19:37:31,948 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 108 changer transitions 0/447 dead transitions. [2024-06-27 19:37:31,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 6377 flow [2024-06-27 19:37:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:31,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-27 19:37:31,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-27 19:37:31,949 INFO L175 Difference]: Start difference. First operand has 341 places, 426 transitions, 5353 flow. Second operand 8 states and 199 transitions. [2024-06-27 19:37:31,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 6377 flow [2024-06-27 19:37:37,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 6139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:37,028 INFO L231 Difference]: Finished difference. Result has 342 places, 428 transitions, 5442 flow [2024-06-27 19:37:37,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5442, PETRI_PLACES=342, PETRI_TRANSITIONS=428} [2024-06-27 19:37:37,029 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-27 19:37:37,029 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 428 transitions, 5442 flow [2024-06-27 19:37:37,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:37,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:37,029 INFO 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] [2024-06-27 19:37:37,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:37:37,029 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)] === [2024-06-27 19:37:37,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:37,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1560166123, now seen corresponding path program 4 times [2024-06-27 19:37:37,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:37,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252835319] [2024-06-27 19:37:37,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:37,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:37,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:37,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252835319] [2024-06-27 19:37:37,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252835319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:37,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:37,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:37,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156844228] [2024-06-27 19:37:37,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:37,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:37,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:37,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:37,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:37,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:37,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 428 transitions, 5442 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:37,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:37,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:37,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:38,765 INFO L124 PetriNetUnfolderBase]: 4636/7979 cut-off events. [2024-06-27 19:37:38,766 INFO L125 PetriNetUnfolderBase]: For 1261430/1261430 co-relation queries the response was YES. [2024-06-27 19:37:38,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57075 conditions, 7979 events. 4636/7979 cut-off events. For 1261430/1261430 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58020 event pairs, 1259 based on Foata normal form. 2/7962 useless extension candidates. Maximal degree in co-relation 56908. Up to 7063 conditions per place. [2024-06-27 19:37:38,863 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 113 changer transitions 0/451 dead transitions. [2024-06-27 19:37:38,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 451 transitions, 6482 flow [2024-06-27 19:37:38,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:37:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:37:38,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-27 19:37:38,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-27 19:37:38,864 INFO L175 Difference]: Start difference. First operand has 342 places, 428 transitions, 5442 flow. Second operand 9 states and 220 transitions. [2024-06-27 19:37:38,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 451 transitions, 6482 flow [2024-06-27 19:37:44,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 451 transitions, 6171 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:44,080 INFO L231 Difference]: Finished difference. Result has 345 places, 430 transitions, 5472 flow [2024-06-27 19:37:44,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5472, PETRI_PLACES=345, PETRI_TRANSITIONS=430} [2024-06-27 19:37:44,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-27 19:37:44,080 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 430 transitions, 5472 flow [2024-06-27 19:37:44,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:44,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:44,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:37:44,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:37:44,081 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)] === [2024-06-27 19:37:44,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:44,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1368301545, now seen corresponding path program 3 times [2024-06-27 19:37:44,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:44,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758227821] [2024-06-27 19:37:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:44,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:44,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:44,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758227821] [2024-06-27 19:37:44,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758227821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:44,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:44,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:44,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048476381] [2024-06-27 19:37:44,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:44,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:44,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:44,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:44,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:44,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:44,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 430 transitions, 5472 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:44,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:44,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:44,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:45,835 INFO L124 PetriNetUnfolderBase]: 4641/7984 cut-off events. [2024-06-27 19:37:45,835 INFO L125 PetriNetUnfolderBase]: For 1272253/1272253 co-relation queries the response was YES. [2024-06-27 19:37:45,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57186 conditions, 7984 events. 4641/7984 cut-off events. For 1272253/1272253 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 58009 event pairs, 1250 based on Foata normal form. 1/7963 useless extension candidates. Maximal degree in co-relation 57018. Up to 6748 conditions per place. [2024-06-27 19:37:45,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 166 changer transitions 0/463 dead transitions. [2024-06-27 19:37:45,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 463 transitions, 7262 flow [2024-06-27 19:37:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:45,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:45,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 19:37:45,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-27 19:37:45,938 INFO L175 Difference]: Start difference. First operand has 345 places, 430 transitions, 5472 flow. Second operand 8 states and 217 transitions. [2024-06-27 19:37:45,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 463 transitions, 7262 flow [2024-06-27 19:37:51,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 463 transitions, 6937 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 19:37:51,374 INFO L231 Difference]: Finished difference. Result has 346 places, 433 transitions, 5531 flow [2024-06-27 19:37:51,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5531, PETRI_PLACES=346, PETRI_TRANSITIONS=433} [2024-06-27 19:37:51,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 19:37:51,375 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 433 transitions, 5531 flow [2024-06-27 19:37:51,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:51,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:51,375 INFO 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] [2024-06-27 19:37:51,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:37:51,375 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)] === [2024-06-27 19:37:51,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1098122123, now seen corresponding path program 4 times [2024-06-27 19:37:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065029168] [2024-06-27 19:37:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:51,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:51,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:51,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065029168] [2024-06-27 19:37:51,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065029168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:51,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:51,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:51,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011774589] [2024-06-27 19:37:51,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:51,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:51,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:51,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:51,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:51,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:51,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 433 transitions, 5531 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:51,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:51,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:51,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:37:53,194 INFO L124 PetriNetUnfolderBase]: 4654/8004 cut-off events. [2024-06-27 19:37:53,194 INFO L125 PetriNetUnfolderBase]: For 1298140/1298140 co-relation queries the response was YES. [2024-06-27 19:37:53,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57658 conditions, 8004 events. 4654/8004 cut-off events. For 1298140/1298140 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58262 event pairs, 1250 based on Foata normal form. 1/7983 useless extension candidates. Maximal degree in co-relation 57489. Up to 6758 conditions per place. [2024-06-27 19:37:53,296 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 172 changer transitions 0/467 dead transitions. [2024-06-27 19:37:53,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 467 transitions, 7643 flow [2024-06-27 19:37:53,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:37:53,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:37:53,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-27 19:37:53,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2024-06-27 19:37:53,297 INFO L175 Difference]: Start difference. First operand has 346 places, 433 transitions, 5531 flow. Second operand 8 states and 215 transitions. [2024-06-27 19:37:53,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 467 transitions, 7643 flow [2024-06-27 19:37:59,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 467 transitions, 7273 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:37:59,085 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 5615 flow [2024-06-27 19:37:59,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5615, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-27 19:37:59,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-27 19:37:59,085 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 5615 flow [2024-06-27 19:37:59,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:59,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:37:59,085 INFO 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] [2024-06-27 19:37:59,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:37:59,086 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)] === [2024-06-27 19:37:59,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:37:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2055619729, now seen corresponding path program 5 times [2024-06-27 19:37:59,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:37:59,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080492003] [2024-06-27 19:37:59,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:37:59,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:37:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:37:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:37:59,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:37:59,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080492003] [2024-06-27 19:37:59,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080492003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:37:59,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:37:59,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:37:59,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333165876] [2024-06-27 19:37:59,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:37:59,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:37:59,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:37:59,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:37:59,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:37:59,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:37:59,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 5615 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:37:59,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:37:59,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:37:59,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:00,853 INFO L124 PetriNetUnfolderBase]: 4651/8000 cut-off events. [2024-06-27 19:38:00,854 INFO L125 PetriNetUnfolderBase]: For 1309242/1309242 co-relation queries the response was YES. [2024-06-27 19:38:00,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57621 conditions, 8000 events. 4651/8000 cut-off events. For 1309242/1309242 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58206 event pairs, 1250 based on Foata normal form. 1/7979 useless extension candidates. Maximal degree in co-relation 57451. Up to 6756 conditions per place. [2024-06-27 19:38:00,963 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 175 changer transitions 0/469 dead transitions. [2024-06-27 19:38:00,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 469 transitions, 7383 flow [2024-06-27 19:38:00,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:00,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:00,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-27 19:38:00,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-27 19:38:00,964 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 5615 flow. Second operand 8 states and 217 transitions. [2024-06-27 19:38:00,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 469 transitions, 7383 flow [2024-06-27 19:38:06,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7087 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-27 19:38:06,627 INFO L231 Difference]: Finished difference. Result has 352 places, 439 transitions, 5675 flow [2024-06-27 19:38:06,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=352, PETRI_TRANSITIONS=439} [2024-06-27 19:38:06,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 19:38:06,628 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 439 transitions, 5675 flow [2024-06-27 19:38:06,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:06,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:06,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:06,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:38:06,628 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)] === [2024-06-27 19:38:06,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:06,628 INFO L85 PathProgramCache]: Analyzing trace with hash -2044191889, now seen corresponding path program 6 times [2024-06-27 19:38:06,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716794069] [2024-06-27 19:38:06,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:06,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:06,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716794069] [2024-06-27 19:38:06,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716794069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:06,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:06,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:06,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479715076] [2024-06-27 19:38:06,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:06,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:06,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:06,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:06,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:06,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:38:06,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 439 transitions, 5675 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:06,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:06,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:38:06,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:08,410 INFO L124 PetriNetUnfolderBase]: 4656/8021 cut-off events. [2024-06-27 19:38:08,410 INFO L125 PetriNetUnfolderBase]: For 1329106/1329106 co-relation queries the response was YES. [2024-06-27 19:38:08,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57888 conditions, 8021 events. 4656/8021 cut-off events. For 1329106/1329106 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58490 event pairs, 1260 based on Foata normal form. 1/8000 useless extension candidates. Maximal degree in co-relation 57717. Up to 6760 conditions per place. [2024-06-27 19:38:08,513 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 178 changer transitions 0/469 dead transitions. [2024-06-27 19:38:08,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 469 transitions, 7496 flow [2024-06-27 19:38:08,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:08,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:08,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-27 19:38:08,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-27 19:38:08,514 INFO L175 Difference]: Start difference. First operand has 352 places, 439 transitions, 5675 flow. Second operand 8 states and 214 transitions. [2024-06-27 19:38:08,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 469 transitions, 7496 flow [2024-06-27 19:38:13,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7035 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:38:13,346 INFO L231 Difference]: Finished difference. Result has 352 places, 442 transitions, 5631 flow [2024-06-27 19:38:13,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5631, PETRI_PLACES=352, PETRI_TRANSITIONS=442} [2024-06-27 19:38:13,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-27 19:38:13,346 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 442 transitions, 5631 flow [2024-06-27 19:38:13,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:13,346 INFO 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] [2024-06-27 19:38:13,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:38:13,347 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)] === [2024-06-27 19:38:13,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:13,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1828590947, now seen corresponding path program 7 times [2024-06-27 19:38:13,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:13,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349930899] [2024-06-27 19:38:13,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:13,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:13,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:13,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349930899] [2024-06-27 19:38:13,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349930899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:13,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:13,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:13,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441714754] [2024-06-27 19:38:13,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:13,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:13,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:13,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:13,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:13,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:38:13,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 442 transitions, 5631 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:13,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:13,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:38:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:15,053 INFO L124 PetriNetUnfolderBase]: 4677/8046 cut-off events. [2024-06-27 19:38:15,053 INFO L125 PetriNetUnfolderBase]: For 1365858/1365858 co-relation queries the response was YES. [2024-06-27 19:38:15,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58490 conditions, 8046 events. 4677/8046 cut-off events. For 1365858/1365858 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58627 event pairs, 1252 based on Foata normal form. 1/8025 useless extension candidates. Maximal degree in co-relation 58318. Up to 6776 conditions per place. [2024-06-27 19:38:15,169 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 192 changer transitions 0/472 dead transitions. [2024-06-27 19:38:15,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 472 transitions, 7811 flow [2024-06-27 19:38:15,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:15,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:15,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-27 19:38:15,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-27 19:38:15,170 INFO L175 Difference]: Start difference. First operand has 352 places, 442 transitions, 5631 flow. Second operand 7 states and 187 transitions. [2024-06-27 19:38:15,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 472 transitions, 7811 flow [2024-06-27 19:38:21,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 472 transitions, 7503 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:38:21,135 INFO L231 Difference]: Finished difference. Result has 354 places, 451 transitions, 5869 flow [2024-06-27 19:38:21,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5869, PETRI_PLACES=354, PETRI_TRANSITIONS=451} [2024-06-27 19:38:21,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 19:38:21,136 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 451 transitions, 5869 flow [2024-06-27 19:38:21,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:21,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:21,136 INFO 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] [2024-06-27 19:38:21,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:38:21,136 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)] === [2024-06-27 19:38:21,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:21,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1769748335, now seen corresponding path program 8 times [2024-06-27 19:38:21,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:21,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534599280] [2024-06-27 19:38:21,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:21,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:21,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:21,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:21,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534599280] [2024-06-27 19:38:21,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534599280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:21,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:21,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:21,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919645977] [2024-06-27 19:38:21,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:21,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:21,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:21,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:21,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:21,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:38:21,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 451 transitions, 5869 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:21,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:21,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:38:21,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:22,990 INFO L124 PetriNetUnfolderBase]: 4690/8064 cut-off events. [2024-06-27 19:38:22,990 INFO L125 PetriNetUnfolderBase]: For 1395937/1395937 co-relation queries the response was YES. [2024-06-27 19:38:23,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58949 conditions, 8064 events. 4690/8064 cut-off events. For 1395937/1395937 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58698 event pairs, 1250 based on Foata normal form. 1/8043 useless extension candidates. Maximal degree in co-relation 58776. Up to 6786 conditions per place. [2024-06-27 19:38:23,092 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 198 changer transitions 0/478 dead transitions. [2024-06-27 19:38:23,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 478 transitions, 8023 flow [2024-06-27 19:38:23,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:23,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:23,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:38:23,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:38:23,092 INFO L175 Difference]: Start difference. First operand has 354 places, 451 transitions, 5869 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:38:23,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 478 transitions, 8023 flow [2024-06-27 19:38:29,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 478 transitions, 7739 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-27 19:38:29,337 INFO L231 Difference]: Finished difference. Result has 359 places, 457 transitions, 6097 flow [2024-06-27 19:38:29,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6097, PETRI_PLACES=359, PETRI_TRANSITIONS=457} [2024-06-27 19:38:29,337 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 19:38:29,337 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 457 transitions, 6097 flow [2024-06-27 19:38:29,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:29,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:29,338 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] [2024-06-27 19:38:29,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:38:29,338 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)] === [2024-06-27 19:38:29,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1160154901, now seen corresponding path program 9 times [2024-06-27 19:38:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:29,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079642498] [2024-06-27 19:38:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:29,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079642498] [2024-06-27 19:38:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079642498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:29,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:29,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645582634] [2024-06-27 19:38:29,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:29,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:29,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:29,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:38:29,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 457 transitions, 6097 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:29,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:29,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:38:29,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:31,139 INFO L124 PetriNetUnfolderBase]: 4695/8073 cut-off events. [2024-06-27 19:38:31,140 INFO L125 PetriNetUnfolderBase]: For 1417265/1417265 co-relation queries the response was YES. [2024-06-27 19:38:31,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59187 conditions, 8073 events. 4695/8073 cut-off events. For 1417265/1417265 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 58760 event pairs, 1279 based on Foata normal form. 1/8052 useless extension candidates. Maximal degree in co-relation 59013. Up to 6790 conditions per place. [2024-06-27 19:38:31,249 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 201 changer transitions 0/482 dead transitions. [2024-06-27 19:38:31,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 482 transitions, 8209 flow [2024-06-27 19:38:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:31,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:31,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-27 19:38:31,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-27 19:38:31,249 INFO L175 Difference]: Start difference. First operand has 359 places, 457 transitions, 6097 flow. Second operand 8 states and 207 transitions. [2024-06-27 19:38:31,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 482 transitions, 8209 flow [2024-06-27 19:38:37,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 482 transitions, 7870 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 19:38:37,992 INFO L231 Difference]: Finished difference. Result has 364 places, 460 transitions, 6216 flow [2024-06-27 19:38:37,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6216, PETRI_PLACES=364, PETRI_TRANSITIONS=460} [2024-06-27 19:38:37,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-27 19:38:37,992 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 460 transitions, 6216 flow [2024-06-27 19:38:37,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:37,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:37,993 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] [2024-06-27 19:38:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:38:37,993 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)] === [2024-06-27 19:38:37,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:37,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1551478851, now seen corresponding path program 1 times [2024-06-27 19:38:37,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:37,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886908026] [2024-06-27 19:38:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:38,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:38,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886908026] [2024-06-27 19:38:38,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886908026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:38,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:38,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:38,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531876681] [2024-06-27 19:38:38,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:38,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:38,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:38,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:38,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:38,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:38:38,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 460 transitions, 6216 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:38,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:38,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:38:38,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:39,804 INFO L124 PetriNetUnfolderBase]: 4716/8110 cut-off events. [2024-06-27 19:38:39,804 INFO L125 PetriNetUnfolderBase]: For 1466468/1466468 co-relation queries the response was YES. [2024-06-27 19:38:39,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60079 conditions, 8110 events. 4716/8110 cut-off events. For 1466468/1466468 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59131 event pairs, 1253 based on Foata normal form. 2/8093 useless extension candidates. Maximal degree in co-relation 59904. Up to 7151 conditions per place. [2024-06-27 19:38:39,910 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 98 changer transitions 2/497 dead transitions. [2024-06-27 19:38:39,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 497 transitions, 7702 flow [2024-06-27 19:38:39,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:38:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:38:39,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-27 19:38:39,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-27 19:38:39,910 INFO L175 Difference]: Start difference. First operand has 364 places, 460 transitions, 6216 flow. Second operand 9 states and 232 transitions. [2024-06-27 19:38:39,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 497 transitions, 7702 flow [2024-06-27 19:38:45,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 497 transitions, 7282 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:45,921 INFO L231 Difference]: Finished difference. Result has 368 places, 464 transitions, 6166 flow [2024-06-27 19:38:45,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6166, PETRI_PLACES=368, PETRI_TRANSITIONS=464} [2024-06-27 19:38:45,921 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-27 19:38:45,922 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 464 transitions, 6166 flow [2024-06-27 19:38:45,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:45,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:45,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:45,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:38:45,922 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)] === [2024-06-27 19:38:45,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:45,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1554335811, now seen corresponding path program 2 times [2024-06-27 19:38:45,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:45,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370544457] [2024-06-27 19:38:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:45,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:46,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:46,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:46,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370544457] [2024-06-27 19:38:46,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370544457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:46,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:46,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:38:46,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051393867] [2024-06-27 19:38:46,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:46,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:38:46,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:46,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:38:46,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:38:46,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:38:46,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 464 transitions, 6166 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:46,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:46,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:38:46,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:47,753 INFO L124 PetriNetUnfolderBase]: 4711/8109 cut-off events. [2024-06-27 19:38:47,753 INFO L125 PetriNetUnfolderBase]: For 1469169/1469169 co-relation queries the response was YES. [2024-06-27 19:38:47,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59709 conditions, 8109 events. 4711/8109 cut-off events. For 1469169/1469169 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59161 event pairs, 1268 based on Foata normal form. 2/8097 useless extension candidates. Maximal degree in co-relation 59532. Up to 7201 conditions per place. [2024-06-27 19:38:47,871 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 387 selfloop transitions, 93 changer transitions 0/489 dead transitions. [2024-06-27 19:38:47,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 489 transitions, 7188 flow [2024-06-27 19:38:47,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:38:47,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:38:47,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-27 19:38:47,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-27 19:38:47,871 INFO L175 Difference]: Start difference. First operand has 368 places, 464 transitions, 6166 flow. Second operand 8 states and 205 transitions. [2024-06-27 19:38:47,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 489 transitions, 7188 flow [2024-06-27 19:38:53,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 489 transitions, 6886 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 19:38:53,978 INFO L231 Difference]: Finished difference. Result has 370 places, 464 transitions, 6055 flow [2024-06-27 19:38:53,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6055, PETRI_PLACES=370, PETRI_TRANSITIONS=464} [2024-06-27 19:38:53,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 19:38:53,979 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 464 transitions, 6055 flow [2024-06-27 19:38:53,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:53,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:38:53,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:38:53,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:38:53,979 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)] === [2024-06-27 19:38:53,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:38:53,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1297337277, now seen corresponding path program 3 times [2024-06-27 19:38:53,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:38:53,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042229897] [2024-06-27 19:38:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:38:53,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:38:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:38:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:38:54,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:38:54,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042229897] [2024-06-27 19:38:54,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042229897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:38:54,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:38:54,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:38:54,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025854681] [2024-06-27 19:38:54,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:38:54,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:38:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:38:54,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:38:54,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:38:54,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:38:54,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 464 transitions, 6055 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:38:54,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:38:54,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:38:54,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:38:55,825 INFO L124 PetriNetUnfolderBase]: 4719/8129 cut-off events. [2024-06-27 19:38:55,825 INFO L125 PetriNetUnfolderBase]: For 1488624/1488624 co-relation queries the response was YES. [2024-06-27 19:38:55,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59796 conditions, 8129 events. 4719/8129 cut-off events. For 1488624/1488624 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 59395 event pairs, 1276 based on Foata normal form. 2/8117 useless extension candidates. Maximal degree in co-relation 59618. Up to 7213 conditions per place. [2024-06-27 19:38:55,936 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 95 changer transitions 0/484 dead transitions. [2024-06-27 19:38:55,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 484 transitions, 7128 flow [2024-06-27 19:38:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:38:55,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:38:55,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-27 19:38:55,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-27 19:38:55,937 INFO L175 Difference]: Start difference. First operand has 370 places, 464 transitions, 6055 flow. Second operand 7 states and 178 transitions. [2024-06-27 19:38:55,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 484 transitions, 7128 flow [2024-06-27 19:39:02,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 484 transitions, 6922 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:39:02,597 INFO L231 Difference]: Finished difference. Result has 370 places, 466 transitions, 6127 flow [2024-06-27 19:39:02,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6127, PETRI_PLACES=370, PETRI_TRANSITIONS=466} [2024-06-27 19:39:02,597 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-27 19:39:02,597 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 466 transitions, 6127 flow [2024-06-27 19:39:02,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:02,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:02,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:02,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:39:02,597 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)] === [2024-06-27 19:39:02,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:02,598 INFO L85 PathProgramCache]: Analyzing trace with hash -699896171, now seen corresponding path program 5 times [2024-06-27 19:39:02,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:02,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832557447] [2024-06-27 19:39:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:02,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:02,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832557447] [2024-06-27 19:39:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832557447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:02,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:02,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92613017] [2024-06-27 19:39:02,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:02,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:02,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:02,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:02,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:02,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:39:02,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 466 transitions, 6127 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:02,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:02,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:39:02,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:04,428 INFO L124 PetriNetUnfolderBase]: 4727/8128 cut-off events. [2024-06-27 19:39:04,428 INFO L125 PetriNetUnfolderBase]: For 1513215/1513215 co-relation queries the response was YES. [2024-06-27 19:39:04,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60168 conditions, 8128 events. 4727/8128 cut-off events. For 1513215/1513215 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59369 event pairs, 1260 based on Foata normal form. 2/8115 useless extension candidates. Maximal degree in co-relation 59989. Up to 7156 conditions per place. [2024-06-27 19:39:04,543 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 108 changer transitions 2/500 dead transitions. [2024-06-27 19:39:04,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 500 transitions, 7683 flow [2024-06-27 19:39:04,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:39:04,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:39:04,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-27 19:39:04,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-27 19:39:04,544 INFO L175 Difference]: Start difference. First operand has 370 places, 466 transitions, 6127 flow. Second operand 9 states and 229 transitions. [2024-06-27 19:39:04,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 500 transitions, 7683 flow [2024-06-27 19:39:11,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 500 transitions, 7428 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:11,386 INFO L231 Difference]: Finished difference. Result has 375 places, 470 transitions, 6326 flow [2024-06-27 19:39:11,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6326, PETRI_PLACES=375, PETRI_TRANSITIONS=470} [2024-06-27 19:39:11,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-27 19:39:11,386 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 470 transitions, 6326 flow [2024-06-27 19:39:11,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:11,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:11,386 INFO 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] [2024-06-27 19:39:11,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 19:39:11,386 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)] === [2024-06-27 19:39:11,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:11,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1430027685, now seen corresponding path program 6 times [2024-06-27 19:39:11,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:11,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361612653] [2024-06-27 19:39:11,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:11,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:11,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:11,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:11,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:11,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361612653] [2024-06-27 19:39:11,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361612653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:11,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:11,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:11,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105034879] [2024-06-27 19:39:11,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:11,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:11,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:11,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:11,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:11,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:39:11,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 470 transitions, 6326 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:11,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:11,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:39:11,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:13,227 INFO L124 PetriNetUnfolderBase]: 4722/8126 cut-off events. [2024-06-27 19:39:13,227 INFO L125 PetriNetUnfolderBase]: For 1515563/1515563 co-relation queries the response was YES. [2024-06-27 19:39:13,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59983 conditions, 8126 events. 4722/8126 cut-off events. For 1515563/1515563 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59296 event pairs, 1276 based on Foata normal form. 2/8122 useless extension candidates. Maximal degree in co-relation 59802. Up to 7206 conditions per place. [2024-06-27 19:39:13,334 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 103 changer transitions 0/492 dead transitions. [2024-06-27 19:39:13,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 492 transitions, 7346 flow [2024-06-27 19:39:13,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:13,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:39:13,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-27 19:39:13,335 INFO L175 Difference]: Start difference. First operand has 375 places, 470 transitions, 6326 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:39:13,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 492 transitions, 7346 flow [2024-06-27 19:39:18,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 492 transitions, 7027 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:18,923 INFO L231 Difference]: Finished difference. Result has 378 places, 470 transitions, 6218 flow [2024-06-27 19:39:18,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6218, PETRI_PLACES=378, PETRI_TRANSITIONS=470} [2024-06-27 19:39:18,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 19:39:18,923 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 470 transitions, 6218 flow [2024-06-27 19:39:18,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:18,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:18,923 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] [2024-06-27 19:39:18,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 19:39:18,923 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)] === [2024-06-27 19:39:18,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:18,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1547237097, now seen corresponding path program 10 times [2024-06-27 19:39:18,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:18,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556342443] [2024-06-27 19:39:18,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:18,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:18,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:18,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556342443] [2024-06-27 19:39:18,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556342443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:18,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:18,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:18,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984996303] [2024-06-27 19:39:18,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:18,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:18,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:18,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:18,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:19,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:39:19,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 470 transitions, 6218 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:19,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:19,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:39:19,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:20,631 INFO L124 PetriNetUnfolderBase]: 4727/8133 cut-off events. [2024-06-27 19:39:20,631 INFO L125 PetriNetUnfolderBase]: For 1522264/1522264 co-relation queries the response was YES. [2024-06-27 19:39:20,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60085 conditions, 8133 events. 4727/8133 cut-off events. For 1522264/1522264 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59401 event pairs, 1304 based on Foata normal form. 1/8128 useless extension candidates. Maximal degree in co-relation 59902. Up to 6835 conditions per place. [2024-06-27 19:39:20,895 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 166 changer transitions 0/499 dead transitions. [2024-06-27 19:39:20,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 499 transitions, 7871 flow [2024-06-27 19:39:20,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-27 19:39:20,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-06-27 19:39:20,895 INFO L175 Difference]: Start difference. First operand has 378 places, 470 transitions, 6218 flow. Second operand 8 states and 213 transitions. [2024-06-27 19:39:20,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 499 transitions, 7871 flow [2024-06-27 19:39:28,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 499 transitions, 7643 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:39:28,709 INFO L231 Difference]: Finished difference. Result has 379 places, 473 transitions, 6383 flow [2024-06-27 19:39:28,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6383, PETRI_PLACES=379, PETRI_TRANSITIONS=473} [2024-06-27 19:39:28,710 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-27 19:39:28,710 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 473 transitions, 6383 flow [2024-06-27 19:39:28,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:28,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:28,710 INFO 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] [2024-06-27 19:39:28,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 19:39:28,710 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)] === [2024-06-27 19:39:28,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:28,710 INFO L85 PathProgramCache]: Analyzing trace with hash -137327609, now seen corresponding path program 11 times [2024-06-27 19:39:28,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:28,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137565895] [2024-06-27 19:39:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:28,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:28,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:28,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:28,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137565895] [2024-06-27 19:39:28,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137565895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:28,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:28,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:28,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541025839] [2024-06-27 19:39:28,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:28,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:28,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:28,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:28,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:39:28,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 473 transitions, 6383 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:28,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:28,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:39:28,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:30,474 INFO L124 PetriNetUnfolderBase]: 4740/8157 cut-off events. [2024-06-27 19:39:30,474 INFO L125 PetriNetUnfolderBase]: For 1554710/1554710 co-relation queries the response was YES. [2024-06-27 19:39:30,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60734 conditions, 8157 events. 4740/8157 cut-off events. For 1554710/1554710 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59604 event pairs, 1305 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60550. Up to 6845 conditions per place. [2024-06-27 19:39:30,585 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 173 changer transitions 0/503 dead transitions. [2024-06-27 19:39:30,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 503 transitions, 8371 flow [2024-06-27 19:39:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:30,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:39:30,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-27 19:39:30,586 INFO L175 Difference]: Start difference. First operand has 379 places, 473 transitions, 6383 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:39:30,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 503 transitions, 8371 flow [2024-06-27 19:39:37,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 503 transitions, 8108 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:39:37,412 INFO L231 Difference]: Finished difference. Result has 383 places, 479 transitions, 6590 flow [2024-06-27 19:39:37,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6590, PETRI_PLACES=383, PETRI_TRANSITIONS=479} [2024-06-27 19:39:37,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 19:39:37,412 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 479 transitions, 6590 flow [2024-06-27 19:39:37,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:37,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:37,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:39:37,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 19:39:37,413 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)] === [2024-06-27 19:39:37,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:37,413 INFO L85 PathProgramCache]: Analyzing trace with hash 226220623, now seen corresponding path program 12 times [2024-06-27 19:39:37,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:37,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339590183] [2024-06-27 19:39:37,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:37,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:37,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:37,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:37,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339590183] [2024-06-27 19:39:37,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339590183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:37,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:37,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:37,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055772542] [2024-06-27 19:39:37,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:37,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:37,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:37,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:37,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:37,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:39:37,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 479 transitions, 6590 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:37,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:37,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:39:37,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:39,242 INFO L124 PetriNetUnfolderBase]: 4737/8153 cut-off events. [2024-06-27 19:39:39,242 INFO L125 PetriNetUnfolderBase]: For 1567824/1567824 co-relation queries the response was YES. [2024-06-27 19:39:39,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60755 conditions, 8153 events. 4737/8153 cut-off events. For 1567824/1567824 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59601 event pairs, 1308 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60568. Up to 6843 conditions per place. [2024-06-27 19:39:39,356 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 171 changer transitions 0/505 dead transitions. [2024-06-27 19:39:39,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 505 transitions, 8210 flow [2024-06-27 19:39:39,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:39,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-27 19:39:39,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-27 19:39:39,357 INFO L175 Difference]: Start difference. First operand has 383 places, 479 transitions, 6590 flow. Second operand 8 states and 212 transitions. [2024-06-27 19:39:39,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 505 transitions, 8210 flow [2024-06-27 19:39:48,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 505 transitions, 7943 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-27 19:39:48,226 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6671 flow [2024-06-27 19:39:48,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6671, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-27 19:39:48,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 19:39:48,227 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6671 flow [2024-06-27 19:39:48,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:48,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:48,227 INFO 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] [2024-06-27 19:39:48,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 19:39:48,227 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)] === [2024-06-27 19:39:48,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:48,227 INFO L85 PathProgramCache]: Analyzing trace with hash -491746391, now seen corresponding path program 13 times [2024-06-27 19:39:48,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:48,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009696193] [2024-06-27 19:39:48,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:48,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:48,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:48,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:48,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009696193] [2024-06-27 19:39:48,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009696193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:48,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:48,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:48,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949033402] [2024-06-27 19:39:48,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:48,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:48,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:48,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:48,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:48,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:39:48,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6671 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:48,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:48,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:39:48,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:50,006 INFO L124 PetriNetUnfolderBase]: 4734/8157 cut-off events. [2024-06-27 19:39:50,006 INFO L125 PetriNetUnfolderBase]: For 1579845/1579845 co-relation queries the response was YES. [2024-06-27 19:39:50,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60773 conditions, 8157 events. 4734/8157 cut-off events. For 1579845/1579845 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59678 event pairs, 1312 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60584. Up to 6841 conditions per place. [2024-06-27 19:39:50,123 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 175 changer transitions 0/503 dead transitions. [2024-06-27 19:39:50,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 503 transitions, 8569 flow [2024-06-27 19:39:50,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:50,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:50,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-27 19:39:50,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-27 19:39:50,124 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6671 flow. Second operand 8 states and 210 transitions. [2024-06-27 19:39:50,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 503 transitions, 8569 flow [2024-06-27 19:39:57,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 503 transitions, 8110 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:39:57,484 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6568 flow [2024-06-27 19:39:57,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-27 19:39:57,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 19:39:57,485 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6568 flow [2024-06-27 19:39:57,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:57,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:39:57,485 INFO 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] [2024-06-27 19:39:57,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 19:39:57,485 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)] === [2024-06-27 19:39:57,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:39:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash 154504309, now seen corresponding path program 14 times [2024-06-27 19:39:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:39:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100077993] [2024-06-27 19:39:57,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:39:57,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:39:57,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:39:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:39:57,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:39:57,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100077993] [2024-06-27 19:39:57,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100077993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:39:57,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:39:57,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:39:57,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766562589] [2024-06-27 19:39:57,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:39:57,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:39:57,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:39:57,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:39:57,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:39:57,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:39:57,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6568 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:39:57,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:39:57,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:39:57,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:39:59,246 INFO L124 PetriNetUnfolderBase]: 4731/8153 cut-off events. [2024-06-27 19:39:59,246 INFO L125 PetriNetUnfolderBase]: For 1589511/1589511 co-relation queries the response was YES. [2024-06-27 19:39:59,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60706 conditions, 8153 events. 4731/8153 cut-off events. For 1589511/1589511 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59600 event pairs, 1316 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60517. Up to 6839 conditions per place. [2024-06-27 19:39:59,362 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 178 changer transitions 0/505 dead transitions. [2024-06-27 19:39:59,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 505 transitions, 8196 flow [2024-06-27 19:39:59,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:39:59,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:39:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-27 19:39:59,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-27 19:39:59,363 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6568 flow. Second operand 8 states and 211 transitions. [2024-06-27 19:39:59,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 505 transitions, 8196 flow [2024-06-27 19:40:08,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 505 transitions, 7842 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:08,219 INFO L231 Difference]: Finished difference. Result has 389 places, 479 transitions, 6576 flow [2024-06-27 19:40:08,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6576, PETRI_PLACES=389, PETRI_TRANSITIONS=479} [2024-06-27 19:40:08,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-27 19:40:08,220 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 479 transitions, 6576 flow [2024-06-27 19:40:08,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:08,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:08,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:08,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 19:40:08,220 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)] === [2024-06-27 19:40:08,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:08,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1497597827, now seen corresponding path program 15 times [2024-06-27 19:40:08,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:08,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512815293] [2024-06-27 19:40:08,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:08,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:08,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:08,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:08,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512815293] [2024-06-27 19:40:08,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512815293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:08,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:08,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:08,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307342333] [2024-06-27 19:40:08,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:08,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:08,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:40:08,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 479 transitions, 6576 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:08,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:08,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:40:08,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:10,120 INFO L124 PetriNetUnfolderBase]: 4752/8176 cut-off events. [2024-06-27 19:40:10,120 INFO L125 PetriNetUnfolderBase]: For 1633773/1633773 co-relation queries the response was YES. [2024-06-27 19:40:10,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61402 conditions, 8176 events. 4752/8176 cut-off events. For 1633773/1633773 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59772 event pairs, 1291 based on Foata normal form. 1/8171 useless extension candidates. Maximal degree in co-relation 61211. Up to 6861 conditions per place. [2024-06-27 19:40:10,234 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 190 changer transitions 0/513 dead transitions. [2024-06-27 19:40:10,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 513 transitions, 8934 flow [2024-06-27 19:40:10,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:40:10,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:40:10,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-27 19:40:10,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-27 19:40:10,235 INFO L175 Difference]: Start difference. First operand has 389 places, 479 transitions, 6576 flow. Second operand 10 states and 256 transitions. [2024-06-27 19:40:10,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 513 transitions, 8934 flow [2024-06-27 19:40:17,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 513 transitions, 8528 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:40:17,014 INFO L231 Difference]: Finished difference. Result has 392 places, 486 transitions, 6701 flow [2024-06-27 19:40:17,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6701, PETRI_PLACES=392, PETRI_TRANSITIONS=486} [2024-06-27 19:40:17,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-27 19:40:17,015 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 486 transitions, 6701 flow [2024-06-27 19:40:17,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:17,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:17,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:17,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 19:40:17,015 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:40:17,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:17,016 INFO L85 PathProgramCache]: Analyzing trace with hash 538617559, now seen corresponding path program 16 times [2024-06-27 19:40:17,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:17,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602821069] [2024-06-27 19:40:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:17,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:17,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:17,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602821069] [2024-06-27 19:40:17,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602821069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:17,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:17,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:17,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473290551] [2024-06-27 19:40:17,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:17,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:17,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:17,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:17,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:17,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:40:17,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 486 transitions, 6701 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:17,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:17,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:40:17,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:19,065 INFO L124 PetriNetUnfolderBase]: 4746/8180 cut-off events. [2024-06-27 19:40:19,065 INFO L125 PetriNetUnfolderBase]: For 1644306/1644306 co-relation queries the response was YES. [2024-06-27 19:40:19,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61211 conditions, 8180 events. 4746/8180 cut-off events. For 1644306/1644306 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59838 event pairs, 1301 based on Foata normal form. 2/8176 useless extension candidates. Maximal degree in co-relation 61019. Up to 6856 conditions per place. [2024-06-27 19:40:19,189 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 184 changer transitions 0/507 dead transitions. [2024-06-27 19:40:19,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 507 transitions, 8617 flow [2024-06-27 19:40:19,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:40:19,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:40:19,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:40:19,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-27 19:40:19,190 INFO L175 Difference]: Start difference. First operand has 392 places, 486 transitions, 6701 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:40:19,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 507 transitions, 8617 flow [2024-06-27 19:40:26,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 507 transitions, 8225 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-27 19:40:26,453 INFO L231 Difference]: Finished difference. Result has 393 places, 486 transitions, 6684 flow [2024-06-27 19:40:26,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6684, PETRI_PLACES=393, PETRI_TRANSITIONS=486} [2024-06-27 19:40:26,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 19:40:26,454 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 486 transitions, 6684 flow [2024-06-27 19:40:26,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:26,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:26,454 INFO 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] [2024-06-27 19:40:26,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 19:40:26,454 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)] === [2024-06-27 19:40:26,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:26,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1187260649, now seen corresponding path program 17 times [2024-06-27 19:40:26,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:26,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301740234] [2024-06-27 19:40:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:26,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:26,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:26,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301740234] [2024-06-27 19:40:26,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301740234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:26,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:26,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:40:26,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968877581] [2024-06-27 19:40:26,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:26,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:40:26,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:26,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:40:26,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:40:26,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:40:26,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 486 transitions, 6684 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:26,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:26,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:40:26,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:28,256 INFO L124 PetriNetUnfolderBase]: 4756/8147 cut-off events. [2024-06-27 19:40:28,256 INFO L125 PetriNetUnfolderBase]: For 1669414/1669414 co-relation queries the response was YES. [2024-06-27 19:40:28,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61387 conditions, 8147 events. 4756/8147 cut-off events. For 1669414/1669414 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59429 event pairs, 1360 based on Foata normal form. 2/8120 useless extension candidates. Maximal degree in co-relation 61193. Up to 6866 conditions per place. [2024-06-27 19:40:28,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 184 changer transitions 0/504 dead transitions. [2024-06-27 19:40:28,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 504 transitions, 8667 flow [2024-06-27 19:40:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:28,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:40:28,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:40:28,374 INFO L175 Difference]: Start difference. First operand has 393 places, 486 transitions, 6684 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:40:28,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 504 transitions, 8667 flow [2024-06-27 19:40:37,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 504 transitions, 8283 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:40:37,945 INFO L231 Difference]: Finished difference. Result has 393 places, 490 transitions, 6760 flow [2024-06-27 19:40:37,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6306, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6760, PETRI_PLACES=393, PETRI_TRANSITIONS=490} [2024-06-27 19:40:37,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 19:40:37,945 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 490 transitions, 6760 flow [2024-06-27 19:40:37,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:37,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:37,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:37,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 19:40:37,945 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)] === [2024-06-27 19:40:37,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:37,946 INFO L85 PathProgramCache]: Analyzing trace with hash 862542325, now seen corresponding path program 18 times [2024-06-27 19:40:37,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:37,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913683821] [2024-06-27 19:40:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:37,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:37,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:37,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913683821] [2024-06-27 19:40:37,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913683821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:37,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:37,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:40:37,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213589750] [2024-06-27 19:40:37,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:37,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:40:37,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:37,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:40:37,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:40:38,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:40:38,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 490 transitions, 6760 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:38,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:38,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:40:38,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:39,842 INFO L124 PetriNetUnfolderBase]: 4766/8165 cut-off events. [2024-06-27 19:40:39,842 INFO L125 PetriNetUnfolderBase]: For 1691677/1691677 co-relation queries the response was YES. [2024-06-27 19:40:39,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61633 conditions, 8165 events. 4766/8165 cut-off events. For 1691677/1691677 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59602 event pairs, 1360 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61438. Up to 6876 conditions per place. [2024-06-27 19:40:39,961 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-27 19:40:39,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 508 transitions, 8759 flow [2024-06-27 19:40:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:40:39,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:40:39,962 INFO L175 Difference]: Start difference. First operand has 393 places, 490 transitions, 6760 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:40:39,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 508 transitions, 8759 flow [2024-06-27 19:40:47,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 508 transitions, 8092 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-27 19:40:47,713 INFO L231 Difference]: Finished difference. Result has 394 places, 494 transitions, 6559 flow [2024-06-27 19:40:47,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6559, PETRI_PLACES=394, PETRI_TRANSITIONS=494} [2024-06-27 19:40:47,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-27 19:40:47,714 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 494 transitions, 6559 flow [2024-06-27 19:40:47,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:47,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:47,714 INFO 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] [2024-06-27 19:40:47,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 19:40:47,714 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)] === [2024-06-27 19:40:47,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:47,715 INFO L85 PathProgramCache]: Analyzing trace with hash 509223413, now seen corresponding path program 19 times [2024-06-27 19:40:47,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:47,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412658289] [2024-06-27 19:40:47,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:47,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:47,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:47,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:47,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412658289] [2024-06-27 19:40:47,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412658289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:47,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:47,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:40:47,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476651748] [2024-06-27 19:40:47,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:47,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:40:47,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:47,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:40:47,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:40:47,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:40:47,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 494 transitions, 6559 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:47,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:47,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:40:47,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:40:49,633 INFO L124 PetriNetUnfolderBase]: 4760/8165 cut-off events. [2024-06-27 19:40:49,633 INFO L125 PetriNetUnfolderBase]: For 1687220/1687220 co-relation queries the response was YES. [2024-06-27 19:40:49,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61283 conditions, 8165 events. 4760/8165 cut-off events. For 1687220/1687220 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59673 event pairs, 1368 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61088. Up to 6871 conditions per place. [2024-06-27 19:40:49,758 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-27 19:40:49,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 508 transitions, 8477 flow [2024-06-27 19:40:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:40:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:40:49,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:40:49,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:40:49,759 INFO L175 Difference]: Start difference. First operand has 394 places, 494 transitions, 6559 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:40:49,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 508 transitions, 8477 flow [2024-06-27 19:40:58,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 508 transitions, 8120 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:40:58,227 INFO L231 Difference]: Finished difference. Result has 397 places, 494 transitions, 6581 flow [2024-06-27 19:40:58,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6581, PETRI_PLACES=397, PETRI_TRANSITIONS=494} [2024-06-27 19:40:58,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 19:40:58,228 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 494 transitions, 6581 flow [2024-06-27 19:40:58,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:58,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:40:58,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:40:58,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 19:40:58,228 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)] === [2024-06-27 19:40:58,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:40:58,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1326860125, now seen corresponding path program 7 times [2024-06-27 19:40:58,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:40:58,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126575619] [2024-06-27 19:40:58,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:40:58,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:40:58,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:40:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:40:58,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:40:58,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126575619] [2024-06-27 19:40:58,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126575619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:40:58,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:40:58,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:40:58,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013930577] [2024-06-27 19:40:58,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:40:58,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:40:58,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:40:58,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:40:58,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:40:58,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:40:58,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 494 transitions, 6581 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:40:58,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:40:58,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:40:58,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:00,120 INFO L124 PetriNetUnfolderBase]: 4796/8237 cut-off events. [2024-06-27 19:41:00,120 INFO L125 PetriNetUnfolderBase]: For 1804859/1804859 co-relation queries the response was YES. [2024-06-27 19:41:00,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62145 conditions, 8237 events. 4796/8237 cut-off events. For 1804859/1804859 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60347 event pairs, 1303 based on Foata normal form. 10/8233 useless extension candidates. Maximal degree in co-relation 61949. Up to 7284 conditions per place. [2024-06-27 19:41:00,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 102 changer transitions 0/512 dead transitions. [2024-06-27 19:41:00,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 512 transitions, 7751 flow [2024-06-27 19:41:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:00,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:00,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-27 19:41:00,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-27 19:41:00,243 INFO L175 Difference]: Start difference. First operand has 397 places, 494 transitions, 6581 flow. Second operand 8 states and 198 transitions. [2024-06-27 19:41:00,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 512 transitions, 7751 flow [2024-06-27 19:41:08,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 512 transitions, 7286 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:41:08,811 INFO L231 Difference]: Finished difference. Result has 397 places, 496 transitions, 6444 flow [2024-06-27 19:41:08,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6116, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6444, PETRI_PLACES=397, PETRI_TRANSITIONS=496} [2024-06-27 19:41:08,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 19:41:08,811 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 496 transitions, 6444 flow [2024-06-27 19:41:08,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:08,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:08,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:41:08,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 19:41:08,812 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)] === [2024-06-27 19:41:08,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash 277623653, now seen corresponding path program 8 times [2024-06-27 19:41:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:08,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865738757] [2024-06-27 19:41:08,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:08,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:08,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:08,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865738757] [2024-06-27 19:41:08,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865738757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:08,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:08,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:41:08,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137764951] [2024-06-27 19:41:08,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:08,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:41:08,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:41:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:41:08,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:41:08,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 496 transitions, 6444 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:08,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:08,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:41:08,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:10,648 INFO L124 PetriNetUnfolderBase]: 4819/8286 cut-off events. [2024-06-27 19:41:10,649 INFO L125 PetriNetUnfolderBase]: For 1806101/1806101 co-relation queries the response was YES. [2024-06-27 19:41:10,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62126 conditions, 8286 events. 4819/8286 cut-off events. For 1806101/1806101 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60899 event pairs, 1298 based on Foata normal form. 10/8282 useless extension candidates. Maximal degree in co-relation 61931. Up to 7193 conditions per place. [2024-06-27 19:41:10,769 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 107 changer transitions 0/519 dead transitions. [2024-06-27 19:41:10,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 519 transitions, 7656 flow [2024-06-27 19:41:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:41:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:41:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-27 19:41:10,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-27 19:41:10,770 INFO L175 Difference]: Start difference. First operand has 397 places, 496 transitions, 6444 flow. Second operand 9 states and 222 transitions. [2024-06-27 19:41:10,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 519 transitions, 7656 flow [2024-06-27 19:41:18,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 519 transitions, 7358 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-27 19:41:18,199 INFO L231 Difference]: Finished difference. Result has 400 places, 498 transitions, 6487 flow [2024-06-27 19:41:18,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6487, PETRI_PLACES=400, PETRI_TRANSITIONS=498} [2024-06-27 19:41:18,200 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 19:41:18,200 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 498 transitions, 6487 flow [2024-06-27 19:41:18,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:18,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:18,200 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] [2024-06-27 19:41:18,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 19:41:18,200 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)] === [2024-06-27 19:41:18,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1503976565, now seen corresponding path program 20 times [2024-06-27 19:41:18,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:18,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666963639] [2024-06-27 19:41:18,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:18,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:18,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:18,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:18,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666963639] [2024-06-27 19:41:18,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666963639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:18,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:18,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:41:18,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767670402] [2024-06-27 19:41:18,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:18,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:41:18,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:18,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:41:18,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:41:18,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:41:18,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 498 transitions, 6487 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:18,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:18,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:41:18,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:20,039 INFO L124 PetriNetUnfolderBase]: 4813/8262 cut-off events. [2024-06-27 19:41:20,039 INFO L125 PetriNetUnfolderBase]: For 1712991/1712991 co-relation queries the response was YES. [2024-06-27 19:41:20,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61554 conditions, 8262 events. 4813/8262 cut-off events. For 1712991/1712991 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60670 event pairs, 1375 based on Foata normal form. 2/8237 useless extension candidates. Maximal degree in co-relation 61358. Up to 6959 conditions per place. [2024-06-27 19:41:20,155 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 190 changer transitions 0/512 dead transitions. [2024-06-27 19:41:20,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 512 transitions, 8129 flow [2024-06-27 19:41:20,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:20,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:20,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-27 19:41:20,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-27 19:41:20,156 INFO L175 Difference]: Start difference. First operand has 400 places, 498 transitions, 6487 flow. Second operand 8 states and 202 transitions. [2024-06-27 19:41:20,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 512 transitions, 8129 flow [2024-06-27 19:41:29,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 512 transitions, 7810 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-27 19:41:29,394 INFO L231 Difference]: Finished difference. Result has 401 places, 498 transitions, 6555 flow [2024-06-27 19:41:29,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6555, PETRI_PLACES=401, PETRI_TRANSITIONS=498} [2024-06-27 19:41:29,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-27 19:41:29,395 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 498 transitions, 6555 flow [2024-06-27 19:41:29,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:29,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:29,395 INFO 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] [2024-06-27 19:41:29,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 19:41:29,395 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)] === [2024-06-27 19:41:29,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash 72995885, now seen corresponding path program 4 times [2024-06-27 19:41:29,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:29,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679413094] [2024-06-27 19:41:29,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:29,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:29,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:29,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:29,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679413094] [2024-06-27 19:41:29,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679413094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:29,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:29,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:41:29,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151405727] [2024-06-27 19:41:29,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:29,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:41:29,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:29,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:41:29,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:41:29,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:41:29,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 498 transitions, 6555 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:29,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:29,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:41:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:31,310 INFO L124 PetriNetUnfolderBase]: 4834/8327 cut-off events. [2024-06-27 19:41:31,310 INFO L125 PetriNetUnfolderBase]: For 1753448/1753448 co-relation queries the response was YES. [2024-06-27 19:41:31,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62187 conditions, 8327 events. 4834/8327 cut-off events. For 1753448/1753448 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61137 event pairs, 1271 based on Foata normal form. 2/8324 useless extension candidates. Maximal degree in co-relation 61990. Up to 7331 conditions per place. [2024-06-27 19:41:31,431 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 88 changer transitions 2/532 dead transitions. [2024-06-27 19:41:31,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 532 transitions, 8147 flow [2024-06-27 19:41:31,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:41:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:41:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-27 19:41:31,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-27 19:41:31,432 INFO L175 Difference]: Start difference. First operand has 401 places, 498 transitions, 6555 flow. Second operand 9 states and 230 transitions. [2024-06-27 19:41:31,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 532 transitions, 8147 flow [2024-06-27 19:41:41,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 532 transitions, 7683 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-27 19:41:41,366 INFO L231 Difference]: Finished difference. Result has 403 places, 502 transitions, 6449 flow [2024-06-27 19:41:41,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6449, PETRI_PLACES=403, PETRI_TRANSITIONS=502} [2024-06-27 19:41:41,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-27 19:41:41,367 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 502 transitions, 6449 flow [2024-06-27 19:41:41,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:41,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:41,367 INFO 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] [2024-06-27 19:41:41,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 19:41:41,368 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)] === [2024-06-27 19:41:41,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:41,368 INFO L85 PathProgramCache]: Analyzing trace with hash -636742265, now seen corresponding path program 5 times [2024-06-27 19:41:41,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:41,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533629959] [2024-06-27 19:41:41,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:41,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:41,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:41,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:41,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:41,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533629959] [2024-06-27 19:41:41,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533629959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:41,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:41,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:41:41,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580390269] [2024-06-27 19:41:41,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:41,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:41:41,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:41,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:41:41,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:41:41,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:41:41,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 502 transitions, 6449 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:41,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:41,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:41:41,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:43,346 INFO L124 PetriNetUnfolderBase]: 4829/8330 cut-off events. [2024-06-27 19:41:43,347 INFO L125 PetriNetUnfolderBase]: For 1751443/1751443 co-relation queries the response was YES. [2024-06-27 19:41:43,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61700 conditions, 8330 events. 4829/8330 cut-off events. For 1751443/1751443 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61260 event pairs, 1290 based on Foata normal form. 2/8328 useless extension candidates. Maximal degree in co-relation 61500. Up to 7381 conditions per place. [2024-06-27 19:41:43,466 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 83 changer transitions 0/524 dead transitions. [2024-06-27 19:41:43,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 524 transitions, 7533 flow [2024-06-27 19:41:43,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:41:43,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:41:43,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-27 19:41:43,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-27 19:41:43,467 INFO L175 Difference]: Start difference. First operand has 403 places, 502 transitions, 6449 flow. Second operand 8 states and 203 transitions. [2024-06-27 19:41:43,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 524 transitions, 7533 flow [2024-06-27 19:41:52,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 524 transitions, 7243 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-27 19:41:52,006 INFO L231 Difference]: Finished difference. Result has 405 places, 502 transitions, 6330 flow [2024-06-27 19:41:52,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6330, PETRI_PLACES=405, PETRI_TRANSITIONS=502} [2024-06-27 19:41:52,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 19:41:52,006 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 502 transitions, 6330 flow [2024-06-27 19:41:52,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:52,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:41:52,007 INFO 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] [2024-06-27 19:41:52,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 19:41:52,007 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)] === [2024-06-27 19:41:52,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:41:52,007 INFO L85 PathProgramCache]: Analyzing trace with hash 163084117, now seen corresponding path program 6 times [2024-06-27 19:41:52,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:41:52,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468286340] [2024-06-27 19:41:52,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:41:52,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:41:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:41:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:41:52,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:41:52,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468286340] [2024-06-27 19:41:52,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468286340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:41:52,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:41:52,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:41:52,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536799758] [2024-06-27 19:41:52,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:41:52,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:41:52,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:41:52,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:41:52,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:41:52,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:41:52,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 502 transitions, 6330 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:41:52,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:41:52,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:41:52,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:41:54,007 INFO L124 PetriNetUnfolderBase]: 4896/8443 cut-off events. [2024-06-27 19:41:54,007 INFO L125 PetriNetUnfolderBase]: For 1894389/1894389 co-relation queries the response was YES. [2024-06-27 19:41:54,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64169 conditions, 8443 events. 4896/8443 cut-off events. For 1894389/1894389 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 62234 event pairs, 1302 based on Foata normal form. 2/8440 useless extension candidates. Maximal degree in co-relation 63968. Up to 7395 conditions per place. [2024-06-27 19:41:54,268 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 90 changer transitions 0/538 dead transitions. [2024-06-27 19:41:54,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 538 transitions, 7956 flow [2024-06-27 19:41:54,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:41:54,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:41:54,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-27 19:41:54,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023809523809524 [2024-06-27 19:41:54,269 INFO L175 Difference]: Start difference. First operand has 405 places, 502 transitions, 6330 flow. Second operand 10 states and 253 transitions. [2024-06-27 19:41:54,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 538 transitions, 7956 flow [2024-06-27 19:42:04,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 538 transitions, 7770 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-27 19:42:04,155 INFO L231 Difference]: Finished difference. Result has 409 places, 506 transitions, 6516 flow [2024-06-27 19:42:04,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6516, PETRI_PLACES=409, PETRI_TRANSITIONS=506} [2024-06-27 19:42:04,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-27 19:42:04,156 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 506 transitions, 6516 flow [2024-06-27 19:42:04,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:04,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:04,156 INFO 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] [2024-06-27 19:42:04,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 19:42:04,156 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)] === [2024-06-27 19:42:04,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:04,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1297886105, now seen corresponding path program 7 times [2024-06-27 19:42:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:04,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950326037] [2024-06-27 19:42:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:04,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:04,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:04,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:04,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950326037] [2024-06-27 19:42:04,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950326037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:04,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:04,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:04,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502196629] [2024-06-27 19:42:04,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:04,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:04,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:04,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:04,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:04,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:42:04,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 506 transitions, 6516 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:04,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:04,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:42:04,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:06,159 INFO L124 PetriNetUnfolderBase]: 4904/8463 cut-off events. [2024-06-27 19:42:06,160 INFO L125 PetriNetUnfolderBase]: For 1920766/1920766 co-relation queries the response was YES. [2024-06-27 19:42:06,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64704 conditions, 8463 events. 4904/8463 cut-off events. For 1920766/1920766 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 62491 event pairs, 1312 based on Foata normal form. 2/8461 useless extension candidates. Maximal degree in co-relation 64501. Up to 7494 conditions per place. [2024-06-27 19:42:06,289 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 85 changer transitions 0/532 dead transitions. [2024-06-27 19:42:06,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 532 transitions, 7713 flow [2024-06-27 19:42:06,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:42:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:42:06,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-27 19:42:06,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-27 19:42:06,290 INFO L175 Difference]: Start difference. First operand has 409 places, 506 transitions, 6516 flow. Second operand 10 states and 245 transitions. [2024-06-27 19:42:06,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 532 transitions, 7713 flow [2024-06-27 19:42:15,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 532 transitions, 7451 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 19:42:15,449 INFO L231 Difference]: Finished difference. Result has 412 places, 508 transitions, 6526 flow [2024-06-27 19:42:15,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6526, PETRI_PLACES=412, PETRI_TRANSITIONS=508} [2024-06-27 19:42:15,449 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-27 19:42:15,449 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 508 transitions, 6526 flow [2024-06-27 19:42:15,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:15,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:15,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:42:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 19:42:15,450 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)] === [2024-06-27 19:42:15,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:15,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1640124245, now seen corresponding path program 8 times [2024-06-27 19:42:15,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:15,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936460834] [2024-06-27 19:42:15,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:15,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:15,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:15,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:15,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936460834] [2024-06-27 19:42:15,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936460834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:15,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:15,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:15,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780407173] [2024-06-27 19:42:15,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:15,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:15,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:15,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:15,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:15,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:42:15,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 508 transitions, 6526 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:15,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:15,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:42:15,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:17,378 INFO L124 PetriNetUnfolderBase]: 4912/8479 cut-off events. [2024-06-27 19:42:17,378 INFO L125 PetriNetUnfolderBase]: For 1944067/1944067 co-relation queries the response was YES. [2024-06-27 19:42:17,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64809 conditions, 8479 events. 4912/8479 cut-off events. For 1944067/1944067 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62671 event pairs, 1118 based on Foata normal form. 2/8477 useless extension candidates. Maximal degree in co-relation 64605. Up to 6669 conditions per place. [2024-06-27 19:42:17,502 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 109 changer transitions 0/546 dead transitions. [2024-06-27 19:42:17,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 546 transitions, 8423 flow [2024-06-27 19:42:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:42:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:42:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-27 19:42:17,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-27 19:42:17,503 INFO L175 Difference]: Start difference. First operand has 412 places, 508 transitions, 6526 flow. Second operand 9 states and 237 transitions. [2024-06-27 19:42:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 546 transitions, 8423 flow [2024-06-27 19:42:28,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 546 transitions, 8190 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 19:42:28,006 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6603 flow [2024-06-27 19:42:28,007 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6603, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-27 19:42:28,007 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-27 19:42:28,007 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6603 flow [2024-06-27 19:42:28,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:28,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:28,007 INFO 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] [2024-06-27 19:42:28,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 19:42:28,007 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)] === [2024-06-27 19:42:28,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:28,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1189266169, now seen corresponding path program 9 times [2024-06-27 19:42:28,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:28,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285859513] [2024-06-27 19:42:28,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:28,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:28,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:28,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285859513] [2024-06-27 19:42:28,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285859513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:28,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:28,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:28,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070039600] [2024-06-27 19:42:28,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:28,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:28,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:28,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:28,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:28,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:42:28,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6603 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:28,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:28,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:42:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:30,018 INFO L124 PetriNetUnfolderBase]: 4887/8432 cut-off events. [2024-06-27 19:42:30,018 INFO L125 PetriNetUnfolderBase]: For 1944397/1944397 co-relation queries the response was YES. [2024-06-27 19:42:30,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63628 conditions, 8432 events. 4887/8432 cut-off events. For 1944397/1944397 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62229 event pairs, 1129 based on Foata normal form. 8/8436 useless extension candidates. Maximal degree in co-relation 63423. Up to 6655 conditions per place. [2024-06-27 19:42:30,163 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 106 changer transitions 0/543 dead transitions. [2024-06-27 19:42:30,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 543 transitions, 8091 flow [2024-06-27 19:42:30,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:42:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:42:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-27 19:42:30,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:42:30,164 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6603 flow. Second operand 9 states and 234 transitions. [2024-06-27 19:42:30,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 543 transitions, 8091 flow [2024-06-27 19:42:39,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 543 transitions, 7722 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-27 19:42:39,640 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6452 flow [2024-06-27 19:42:39,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6452, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-27 19:42:39,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-27 19:42:39,640 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6452 flow [2024-06-27 19:42:39,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:39,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:39,641 INFO 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] [2024-06-27 19:42:39,641 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 19:42:39,641 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)] === [2024-06-27 19:42:39,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:39,641 INFO L85 PathProgramCache]: Analyzing trace with hash 104027989, now seen corresponding path program 10 times [2024-06-27 19:42:39,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:39,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743812637] [2024-06-27 19:42:39,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:39,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:39,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:39,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:39,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:39,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743812637] [2024-06-27 19:42:39,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743812637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:39,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:39,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:39,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425330571] [2024-06-27 19:42:39,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:39,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:39,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:39,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:39,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:39,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:42:39,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6452 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:39,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:39,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:42:39,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:41,579 INFO L124 PetriNetUnfolderBase]: 4864/8405 cut-off events. [2024-06-27 19:42:41,579 INFO L125 PetriNetUnfolderBase]: For 1862948/1862948 co-relation queries the response was YES. [2024-06-27 19:42:41,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61335 conditions, 8405 events. 4864/8405 cut-off events. For 1862948/1862948 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62075 event pairs, 1276 based on Foata normal form. 10/8411 useless extension candidates. Maximal degree in co-relation 61132. Up to 7156 conditions per place. [2024-06-27 19:42:41,718 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 88 changer transitions 0/537 dead transitions. [2024-06-27 19:42:41,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 537 transitions, 7914 flow [2024-06-27 19:42:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:42:41,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:42:41,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-27 19:42:41,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:42:41,719 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6452 flow. Second operand 8 states and 208 transitions. [2024-06-27 19:42:41,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 537 transitions, 7914 flow [2024-06-27 19:42:50,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 537 transitions, 7627 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-27 19:42:50,211 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6348 flow [2024-06-27 19:42:50,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6348, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-27 19:42:50,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-27 19:42:50,212 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6348 flow [2024-06-27 19:42:50,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:50,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:42:50,212 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, 1] [2024-06-27 19:42:50,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 19:42:50,212 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)] === [2024-06-27 19:42:50,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:42:50,212 INFO L85 PathProgramCache]: Analyzing trace with hash 93552469, now seen corresponding path program 11 times [2024-06-27 19:42:50,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:42:50,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368341052] [2024-06-27 19:42:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:42:50,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:42:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:42:50,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:42:50,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:42:50,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368341052] [2024-06-27 19:42:50,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368341052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:42:50,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:42:50,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:42:50,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423956579] [2024-06-27 19:42:50,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:42:50,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:42:50,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:42:50,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:42:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:42:50,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:42:50,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6348 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:42:50,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:42:50,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:42:50,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:42:52,263 INFO L124 PetriNetUnfolderBase]: 4834/8357 cut-off events. [2024-06-27 19:42:52,263 INFO L125 PetriNetUnfolderBase]: For 1756014/1756014 co-relation queries the response was YES. [2024-06-27 19:42:52,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59027 conditions, 8357 events. 4834/8357 cut-off events. For 1756014/1756014 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61726 event pairs, 1282 based on Foata normal form. 10/8363 useless extension candidates. Maximal degree in co-relation 58823. Up to 7356 conditions per place. [2024-06-27 19:42:52,392 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 441 selfloop transitions, 82 changer transitions 0/532 dead transitions. [2024-06-27 19:42:52,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 532 transitions, 7460 flow [2024-06-27 19:42:52,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:42:52,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:42:52,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-27 19:42:52,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-27 19:42:52,393 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6348 flow. Second operand 8 states and 204 transitions. [2024-06-27 19:42:52,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 532 transitions, 7460 flow [2024-06-27 19:43:02,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 532 transitions, 7240 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-27 19:43:02,548 INFO L231 Difference]: Finished difference. Result has 415 places, 510 transitions, 6298 flow [2024-06-27 19:43:02,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6128, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6298, PETRI_PLACES=415, PETRI_TRANSITIONS=510} [2024-06-27 19:43:02,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-27 19:43:02,548 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 510 transitions, 6298 flow [2024-06-27 19:43:02,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:02,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:02,549 INFO 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] [2024-06-27 19:43:02,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 19:43:02,549 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)] === [2024-06-27 19:43:02,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:02,549 INFO L85 PathProgramCache]: Analyzing trace with hash -765229607, now seen corresponding path program 12 times [2024-06-27 19:43:02,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:02,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740040412] [2024-06-27 19:43:02,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:02,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:02,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:02,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740040412] [2024-06-27 19:43:02,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740040412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:02,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:02,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637401867] [2024-06-27 19:43:02,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:02,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:02,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:02,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:02,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:43:02,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 510 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:02,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:02,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:43:02,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:04,405 INFO L124 PetriNetUnfolderBase]: 4870/8401 cut-off events. [2024-06-27 19:43:04,406 INFO L125 PetriNetUnfolderBase]: For 1777333/1777333 co-relation queries the response was YES. [2024-06-27 19:43:04,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59363 conditions, 8401 events. 4870/8401 cut-off events. For 1777333/1777333 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62137 event pairs, 1322 based on Foata normal form. 10/8393 useless extension candidates. Maximal degree in co-relation 59158. Up to 7412 conditions per place. [2024-06-27 19:43:04,534 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 86 changer transitions 0/527 dead transitions. [2024-06-27 19:43:04,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 527 transitions, 7465 flow [2024-06-27 19:43:04,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:43:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:43:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-27 19:43:04,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-27 19:43:04,535 INFO L175 Difference]: Start difference. First operand has 415 places, 510 transitions, 6298 flow. Second operand 7 states and 177 transitions. [2024-06-27 19:43:04,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 527 transitions, 7465 flow [2024-06-27 19:43:14,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 527 transitions, 7251 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-27 19:43:14,477 INFO L231 Difference]: Finished difference. Result has 413 places, 512 transitions, 6349 flow [2024-06-27 19:43:14,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6349, PETRI_PLACES=413, PETRI_TRANSITIONS=512} [2024-06-27 19:43:14,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-27 19:43:14,478 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 512 transitions, 6349 flow [2024-06-27 19:43:14,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:14,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:14,478 INFO 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] [2024-06-27 19:43:14,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 19:43:14,478 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)] === [2024-06-27 19:43:14,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:14,479 INFO L85 PathProgramCache]: Analyzing trace with hash 519351671, now seen corresponding path program 13 times [2024-06-27 19:43:14,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:14,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687360863] [2024-06-27 19:43:14,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:14,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:14,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:14,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:14,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687360863] [2024-06-27 19:43:14,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687360863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:14,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792504672] [2024-06-27 19:43:14,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:14,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:14,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:14,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:14,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:14,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:43:14,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 512 transitions, 6349 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:14,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:14,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:43:14,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:16,341 INFO L124 PetriNetUnfolderBase]: 4906/8465 cut-off events. [2024-06-27 19:43:16,341 INFO L125 PetriNetUnfolderBase]: For 1802254/1802254 co-relation queries the response was YES. [2024-06-27 19:43:16,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60031 conditions, 8465 events. 4906/8465 cut-off events. For 1802254/1802254 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62707 event pairs, 1330 based on Foata normal form. 10/8457 useless extension candidates. Maximal degree in co-relation 59825. Up to 7468 conditions per place. [2024-06-27 19:43:16,467 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 82 changer transitions 0/529 dead transitions. [2024-06-27 19:43:16,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 529 transitions, 7524 flow [2024-06-27 19:43:16,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:43:16,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:43:16,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-27 19:43:16,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-27 19:43:16,469 INFO L175 Difference]: Start difference. First operand has 413 places, 512 transitions, 6349 flow. Second operand 7 states and 176 transitions. [2024-06-27 19:43:16,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 529 transitions, 7524 flow [2024-06-27 19:43:23,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 529 transitions, 7298 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 19:43:23,966 INFO L231 Difference]: Finished difference. Result has 415 places, 514 transitions, 6384 flow [2024-06-27 19:43:23,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6384, PETRI_PLACES=415, PETRI_TRANSITIONS=514} [2024-06-27 19:43:23,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-27 19:43:23,967 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 514 transitions, 6384 flow [2024-06-27 19:43:23,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:23,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:23,967 INFO 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] [2024-06-27 19:43:23,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 19:43:23,967 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)] === [2024-06-27 19:43:23,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:23,967 INFO L85 PathProgramCache]: Analyzing trace with hash 519707861, now seen corresponding path program 14 times [2024-06-27 19:43:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:23,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331837033] [2024-06-27 19:43:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:23,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:24,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:24,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:24,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331837033] [2024-06-27 19:43:24,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331837033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:24,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:24,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:24,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128278848] [2024-06-27 19:43:24,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:24,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:24,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:24,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:24,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:43:24,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 514 transitions, 6384 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:24,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:24,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:43:24,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:25,893 INFO L124 PetriNetUnfolderBase]: 4876/8409 cut-off events. [2024-06-27 19:43:25,893 INFO L125 PetriNetUnfolderBase]: For 1689769/1689769 co-relation queries the response was YES. [2024-06-27 19:43:26,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57903 conditions, 8409 events. 4876/8409 cut-off events. For 1689769/1689769 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62167 event pairs, 1300 based on Foata normal form. 10/8401 useless extension candidates. Maximal degree in co-relation 57696. Up to 7104 conditions per place. [2024-06-27 19:43:26,163 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/533 dead transitions. [2024-06-27 19:43:26,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 533 transitions, 7502 flow [2024-06-27 19:43:26,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:43:26,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:43:26,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:43:26,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 19:43:26,164 INFO L175 Difference]: Start difference. First operand has 415 places, 514 transitions, 6384 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:43:26,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 533 transitions, 7502 flow [2024-06-27 19:43:34,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 533 transitions, 7232 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 19:43:34,317 INFO L231 Difference]: Finished difference. Result has 417 places, 514 transitions, 6298 flow [2024-06-27 19:43:34,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6298, PETRI_PLACES=417, PETRI_TRANSITIONS=514} [2024-06-27 19:43:34,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-27 19:43:34,317 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 514 transitions, 6298 flow [2024-06-27 19:43:34,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:34,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:34,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:34,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 19:43:34,317 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)] === [2024-06-27 19:43:34,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash -857442783, now seen corresponding path program 1 times [2024-06-27 19:43:34,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:34,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371464919] [2024-06-27 19:43:34,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:34,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:34,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:34,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371464919] [2024-06-27 19:43:34,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371464919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:34,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:34,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:34,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797754967] [2024-06-27 19:43:34,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:34,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:34,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:34,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:34,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:34,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:43:34,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 514 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:34,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:34,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:43:34,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:36,270 INFO L124 PetriNetUnfolderBase]: 4929/8504 cut-off events. [2024-06-27 19:43:36,270 INFO L125 PetriNetUnfolderBase]: For 1736462/1736462 co-relation queries the response was YES. [2024-06-27 19:43:36,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59401 conditions, 8504 events. 4929/8504 cut-off events. For 1736462/1736462 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62931 event pairs, 1076 based on Foata normal form. 6/8504 useless extension candidates. Maximal degree in co-relation 59193. Up to 7061 conditions per place. [2024-06-27 19:43:36,401 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 83 changer transitions 0/545 dead transitions. [2024-06-27 19:43:36,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 545 transitions, 8200 flow [2024-06-27 19:43:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:43:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:43:36,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-27 19:43:36,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-27 19:43:36,401 INFO L175 Difference]: Start difference. First operand has 417 places, 514 transitions, 6298 flow. Second operand 7 states and 186 transitions. [2024-06-27 19:43:36,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 545 transitions, 8200 flow [2024-06-27 19:43:45,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 545 transitions, 7990 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-27 19:43:45,806 INFO L231 Difference]: Finished difference. Result has 418 places, 516 transitions, 6341 flow [2024-06-27 19:43:45,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6341, PETRI_PLACES=418, PETRI_TRANSITIONS=516} [2024-06-27 19:43:45,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 19:43:45,807 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 516 transitions, 6341 flow [2024-06-27 19:43:45,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:45,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:45,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:45,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 19:43:45,807 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)] === [2024-06-27 19:43:45,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:45,807 INFO L85 PathProgramCache]: Analyzing trace with hash 1672288161, now seen corresponding path program 2 times [2024-06-27 19:43:45,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:45,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287258444] [2024-06-27 19:43:45,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:45,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:45,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:45,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:45,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287258444] [2024-06-27 19:43:45,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287258444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:45,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:45,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640445245] [2024-06-27 19:43:45,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:45,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:45,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:45,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:45,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:45,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:43:45,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 516 transitions, 6341 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:45,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:45,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:43:45,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:43:47,792 INFO L124 PetriNetUnfolderBase]: 4995/8634 cut-off events. [2024-06-27 19:43:47,792 INFO L125 PetriNetUnfolderBase]: For 1867151/1867151 co-relation queries the response was YES. [2024-06-27 19:43:47,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61826 conditions, 8634 events. 4995/8634 cut-off events. For 1867151/1867151 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64158 event pairs, 1078 based on Foata normal form. 6/8634 useless extension candidates. Maximal degree in co-relation 61617. Up to 7097 conditions per place. [2024-06-27 19:43:47,918 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 90 changer transitions 0/551 dead transitions. [2024-06-27 19:43:47,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 551 transitions, 8279 flow [2024-06-27 19:43:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:43:47,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:43:47,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-27 19:43:47,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-27 19:43:47,918 INFO L175 Difference]: Start difference. First operand has 418 places, 516 transitions, 6341 flow. Second operand 7 states and 193 transitions. [2024-06-27 19:43:47,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 551 transitions, 8279 flow [2024-06-27 19:43:58,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 551 transitions, 8132 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:43:58,507 INFO L231 Difference]: Finished difference. Result has 422 places, 518 transitions, 6464 flow [2024-06-27 19:43:58,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6464, PETRI_PLACES=422, PETRI_TRANSITIONS=518} [2024-06-27 19:43:58,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-27 19:43:58,508 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 518 transitions, 6464 flow [2024-06-27 19:43:58,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:58,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:43:58,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:43:58,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 19:43:58,508 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)] === [2024-06-27 19:43:58,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:43:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1998663585, now seen corresponding path program 3 times [2024-06-27 19:43:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:43:58,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528302969] [2024-06-27 19:43:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:43:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:43:58,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:43:58,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:43:58,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:43:58,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528302969] [2024-06-27 19:43:58,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528302969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:43:58,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:43:58,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:43:58,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582105308] [2024-06-27 19:43:58,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:43:58,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:43:58,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:43:58,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:43:58,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:43:58,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:43:58,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 518 transitions, 6464 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:43:58,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:43:58,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:43:58,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:00,581 INFO L124 PetriNetUnfolderBase]: 4982/8603 cut-off events. [2024-06-27 19:44:00,581 INFO L125 PetriNetUnfolderBase]: For 1805740/1805740 co-relation queries the response was YES. [2024-06-27 19:44:00,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60695 conditions, 8603 events. 4982/8603 cut-off events. For 1805740/1805740 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 63971 event pairs, 1296 based on Foata normal form. 6/8596 useless extension candidates. Maximal degree in co-relation 60485. Up to 7570 conditions per place. [2024-06-27 19:44:00,702 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 466 selfloop transitions, 68 changer transitions 0/543 dead transitions. [2024-06-27 19:44:00,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 543 transitions, 7942 flow [2024-06-27 19:44:00,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:44:00,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:44:00,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-27 19:44:00,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-27 19:44:00,703 INFO L175 Difference]: Start difference. First operand has 422 places, 518 transitions, 6464 flow. Second operand 7 states and 185 transitions. [2024-06-27 19:44:00,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 543 transitions, 7942 flow [2024-06-27 19:44:10,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 543 transitions, 7781 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-27 19:44:10,898 INFO L231 Difference]: Finished difference. Result has 426 places, 518 transitions, 6443 flow [2024-06-27 19:44:10,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6443, PETRI_PLACES=426, PETRI_TRANSITIONS=518} [2024-06-27 19:44:10,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 19:44:10,899 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 518 transitions, 6443 flow [2024-06-27 19:44:10,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:10,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:10,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:10,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 19:44:10,899 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)] === [2024-06-27 19:44:10,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:10,899 INFO L85 PathProgramCache]: Analyzing trace with hash 1999019775, now seen corresponding path program 4 times [2024-06-27 19:44:10,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:10,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590798369] [2024-06-27 19:44:10,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:10,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:10,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:10,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:10,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590798369] [2024-06-27 19:44:10,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590798369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:10,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:10,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:44:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788011527] [2024-06-27 19:44:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:10,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:44:10,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:10,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:44:10,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:44:10,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:44:10,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 518 transitions, 6443 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:10,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:10,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:44:10,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:12,970 INFO L124 PetriNetUnfolderBase]: 5010/8656 cut-off events. [2024-06-27 19:44:12,970 INFO L125 PetriNetUnfolderBase]: For 1854833/1854833 co-relation queries the response was YES. [2024-06-27 19:44:13,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60873 conditions, 8656 events. 5010/8656 cut-off events. For 1854833/1854833 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64425 event pairs, 1315 based on Foata normal form. 8/8658 useless extension candidates. Maximal degree in co-relation 60662. Up to 7720 conditions per place. [2024-06-27 19:44:13,116 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 62 changer transitions 0/537 dead transitions. [2024-06-27 19:44:13,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 537 transitions, 7600 flow [2024-06-27 19:44:13,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:44:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:44:13,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:44:13,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:44:13,117 INFO L175 Difference]: Start difference. First operand has 426 places, 518 transitions, 6443 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:44:13,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 537 transitions, 7600 flow [2024-06-27 19:44:24,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 537 transitions, 7371 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 19:44:24,536 INFO L231 Difference]: Finished difference. Result has 426 places, 519 transitions, 6394 flow [2024-06-27 19:44:24,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6394, PETRI_PLACES=426, PETRI_TRANSITIONS=519} [2024-06-27 19:44:24,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 19:44:24,537 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 519 transitions, 6394 flow [2024-06-27 19:44:24,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:24,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:24,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:24,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 19:44:24,537 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)] === [2024-06-27 19:44:24,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:24,537 INFO L85 PathProgramCache]: Analyzing trace with hash -2042303971, now seen corresponding path program 5 times [2024-06-27 19:44:24,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:24,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497392715] [2024-06-27 19:44:24,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:24,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:24,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:24,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497392715] [2024-06-27 19:44:24,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497392715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:24,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:24,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:44:24,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351896414] [2024-06-27 19:44:24,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:24,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:44:24,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:24,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:44:24,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:44:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:44:24,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 519 transitions, 6394 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:24,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:24,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:44:24,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:26,571 INFO L124 PetriNetUnfolderBase]: 4992/8644 cut-off events. [2024-06-27 19:44:26,572 INFO L125 PetriNetUnfolderBase]: For 1762844/1762844 co-relation queries the response was YES. [2024-06-27 19:44:26,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59282 conditions, 8644 events. 4992/8644 cut-off events. For 1762844/1762844 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64423 event pairs, 1211 based on Foata normal form. 8/8646 useless extension candidates. Maximal degree in co-relation 59070. Up to 7484 conditions per place. [2024-06-27 19:44:26,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 72 changer transitions 0/542 dead transitions. [2024-06-27 19:44:26,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 542 transitions, 7874 flow [2024-06-27 19:44:26,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:44:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:44:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:44:26,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-27 19:44:26,703 INFO L175 Difference]: Start difference. First operand has 426 places, 519 transitions, 6394 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:44:26,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 542 transitions, 7874 flow [2024-06-27 19:44:37,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 542 transitions, 7705 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:44:37,173 INFO L231 Difference]: Finished difference. Result has 428 places, 519 transitions, 6377 flow [2024-06-27 19:44:37,174 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6377, PETRI_PLACES=428, PETRI_TRANSITIONS=519} [2024-06-27 19:44:37,174 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 19:44:37,174 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 519 transitions, 6377 flow [2024-06-27 19:44:37,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:37,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:37,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:37,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 19:44:37,174 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)] === [2024-06-27 19:44:37,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2039447011, now seen corresponding path program 6 times [2024-06-27 19:44:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:37,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672135305] [2024-06-27 19:44:37,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:37,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:37,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:37,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672135305] [2024-06-27 19:44:37,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672135305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:37,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:37,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:44:37,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852940941] [2024-06-27 19:44:37,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:37,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:44:37,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:37,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:44:37,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:44:37,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:44:37,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 519 transitions, 6377 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:37,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:37,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:44:37,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:39,220 INFO L124 PetriNetUnfolderBase]: 4974/8614 cut-off events. [2024-06-27 19:44:39,221 INFO L125 PetriNetUnfolderBase]: For 1668029/1668029 co-relation queries the response was YES. [2024-06-27 19:44:39,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57566 conditions, 8614 events. 4974/8614 cut-off events. For 1668029/1668029 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64219 event pairs, 1301 based on Foata normal form. 8/8616 useless extension candidates. Maximal degree in co-relation 57353. Up to 7668 conditions per place. [2024-06-27 19:44:39,350 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 60 changer transitions 0/537 dead transitions. [2024-06-27 19:44:39,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 537 transitions, 7489 flow [2024-06-27 19:44:39,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:44:39,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:44:39,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-27 19:44:39,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-27 19:44:39,351 INFO L175 Difference]: Start difference. First operand has 428 places, 519 transitions, 6377 flow. Second operand 7 states and 180 transitions. [2024-06-27 19:44:39,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 537 transitions, 7489 flow [2024-06-27 19:44:48,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 537 transitions, 7271 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:44:48,292 INFO L231 Difference]: Finished difference. Result has 429 places, 519 transitions, 6288 flow [2024-06-27 19:44:48,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6288, PETRI_PLACES=429, PETRI_TRANSITIONS=519} [2024-06-27 19:44:48,292 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-27 19:44:48,292 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 519 transitions, 6288 flow [2024-06-27 19:44:48,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:48,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:44:48,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:44:48,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 19:44:48,293 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)] === [2024-06-27 19:44:48,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:44:48,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1923694697, now seen corresponding path program 1 times [2024-06-27 19:44:48,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:44:48,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503186657] [2024-06-27 19:44:48,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:44:48,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:44:48,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:44:48,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:44:48,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:44:48,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503186657] [2024-06-27 19:44:48,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503186657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:44:48,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:44:48,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:44:48,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917298137] [2024-06-27 19:44:48,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:44:48,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:44:48,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:44:48,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:44:48,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:44:48,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:44:48,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 519 transitions, 6288 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:44:48,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:44:48,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:44:48,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:44:50,272 INFO L124 PetriNetUnfolderBase]: 4995/8653 cut-off events. [2024-06-27 19:44:50,272 INFO L125 PetriNetUnfolderBase]: For 1611591/1611591 co-relation queries the response was YES. [2024-06-27 19:44:50,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57817 conditions, 8653 events. 4995/8653 cut-off events. For 1611591/1611591 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 64624 event pairs, 1304 based on Foata normal form. 1/8648 useless extension candidates. Maximal degree in co-relation 57603. Up to 7567 conditions per place. [2024-06-27 19:44:50,528 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 118 changer transitions 0/548 dead transitions. [2024-06-27 19:44:50,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 548 transitions, 8222 flow [2024-06-27 19:44:50,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:44:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:44:50,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-27 19:44:50,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-27 19:44:50,529 INFO L175 Difference]: Start difference. First operand has 429 places, 519 transitions, 6288 flow. Second operand 8 states and 209 transitions. [2024-06-27 19:44:50,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 548 transitions, 8222 flow [2024-06-27 19:45:01,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 548 transitions, 8058 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-27 19:45:01,593 INFO L231 Difference]: Finished difference. Result has 432 places, 528 transitions, 6600 flow [2024-06-27 19:45:01,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6600, PETRI_PLACES=432, PETRI_TRANSITIONS=528} [2024-06-27 19:45:01,594 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 19:45:01,594 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 528 transitions, 6600 flow [2024-06-27 19:45:01,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:01,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:01,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:01,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 19:45:01,595 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)] === [2024-06-27 19:45:01,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:01,595 INFO L85 PathProgramCache]: Analyzing trace with hash 973564511, now seen corresponding path program 2 times [2024-06-27 19:45:01,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:01,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823082846] [2024-06-27 19:45:01,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:01,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:01,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:01,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:01,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:01,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823082846] [2024-06-27 19:45:01,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823082846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:01,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:01,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:01,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990372989] [2024-06-27 19:45:01,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:01,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:01,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:01,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:01,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:01,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:45:01,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 528 transitions, 6600 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:01,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:01,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:45:01,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:03,587 INFO L124 PetriNetUnfolderBase]: 5000/8654 cut-off events. [2024-06-27 19:45:03,588 INFO L125 PetriNetUnfolderBase]: For 1630511/1630511 co-relation queries the response was YES. [2024-06-27 19:45:03,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 8654 events. 5000/8654 cut-off events. For 1630511/1630511 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64535 event pairs, 1304 based on Foata normal form. 1/8649 useless extension candidates. Maximal degree in co-relation 58132. Up to 7573 conditions per place. [2024-06-27 19:45:03,867 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 127 changer transitions 0/547 dead transitions. [2024-06-27 19:45:03,867 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 547 transitions, 8448 flow [2024-06-27 19:45:03,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:03,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:45:03,868 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-27 19:45:03,868 INFO L175 Difference]: Start difference. First operand has 432 places, 528 transitions, 6600 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:45:03,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 547 transitions, 8448 flow [2024-06-27 19:45:15,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 547 transitions, 8274 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:15,401 INFO L231 Difference]: Finished difference. Result has 434 places, 531 transitions, 6749 flow [2024-06-27 19:45:15,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6749, PETRI_PLACES=434, PETRI_TRANSITIONS=531} [2024-06-27 19:45:15,401 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-27 19:45:15,401 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 531 transitions, 6749 flow [2024-06-27 19:45:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:15,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:15,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:15,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 19:45:15,401 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)] === [2024-06-27 19:45:15,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 973357121, now seen corresponding path program 3 times [2024-06-27 19:45:15,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:15,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437259384] [2024-06-27 19:45:15,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:15,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:15,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:15,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437259384] [2024-06-27 19:45:15,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437259384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:15,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:15,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:15,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546719678] [2024-06-27 19:45:15,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:15,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:15,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:15,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:15,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:15,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:45:15,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 531 transitions, 6749 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:15,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:15,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:45:15,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:17,492 INFO L124 PetriNetUnfolderBase]: 4997/8650 cut-off events. [2024-06-27 19:45:17,492 INFO L125 PetriNetUnfolderBase]: For 1616959/1616959 co-relation queries the response was YES. [2024-06-27 19:45:17,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58211 conditions, 8650 events. 4997/8650 cut-off events. For 1616959/1616959 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64583 event pairs, 1304 based on Foata normal form. 1/8645 useless extension candidates. Maximal degree in co-relation 57994. Up to 7570 conditions per place. [2024-06-27 19:45:17,622 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 118 changer transitions 0/546 dead transitions. [2024-06-27 19:45:17,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 546 transitions, 8199 flow [2024-06-27 19:45:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-27 19:45:17,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:45:17,623 INFO L175 Difference]: Start difference. First operand has 434 places, 531 transitions, 6749 flow. Second operand 7 states and 182 transitions. [2024-06-27 19:45:17,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 546 transitions, 8199 flow [2024-06-27 19:45:29,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 546 transitions, 7967 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:45:29,503 INFO L231 Difference]: Finished difference. Result has 436 places, 531 transitions, 6769 flow [2024-06-27 19:45:29,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6769, PETRI_PLACES=436, PETRI_TRANSITIONS=531} [2024-06-27 19:45:29,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-27 19:45:29,504 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 531 transitions, 6769 flow [2024-06-27 19:45:29,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:29,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:29,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:29,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 19:45:29,505 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)] === [2024-06-27 19:45:29,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:29,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1998817345, now seen corresponding path program 4 times [2024-06-27 19:45:29,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:29,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128019543] [2024-06-27 19:45:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:29,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:29,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:29,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:29,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128019543] [2024-06-27 19:45:29,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128019543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:29,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:29,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:29,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724619943] [2024-06-27 19:45:29,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:29,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:29,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:29,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:29,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:29,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:45:29,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 531 transitions, 6769 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:29,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:29,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:45:29,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:31,597 INFO L124 PetriNetUnfolderBase]: 5002/8659 cut-off events. [2024-06-27 19:45:31,597 INFO L125 PetriNetUnfolderBase]: For 1617535/1617535 co-relation queries the response was YES. [2024-06-27 19:45:31,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58283 conditions, 8659 events. 5002/8659 cut-off events. For 1617535/1617535 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 64661 event pairs, 1304 based on Foata normal form. 1/8654 useless extension candidates. Maximal degree in co-relation 58066. Up to 7576 conditions per place. [2024-06-27 19:45:31,736 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 121 changer transitions 0/552 dead transitions. [2024-06-27 19:45:31,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 552 transitions, 8293 flow [2024-06-27 19:45:31,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:31,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:31,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-27 19:45:31,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-27 19:45:31,737 INFO L175 Difference]: Start difference. First operand has 436 places, 531 transitions, 6769 flow. Second operand 7 states and 184 transitions. [2024-06-27 19:45:31,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 552 transitions, 8293 flow [2024-06-27 19:45:44,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 552 transitions, 7969 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-27 19:45:44,098 INFO L231 Difference]: Finished difference. Result has 435 places, 534 transitions, 6755 flow [2024-06-27 19:45:44,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6755, PETRI_PLACES=435, PETRI_TRANSITIONS=534} [2024-06-27 19:45:44,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-27 19:45:44,098 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 534 transitions, 6755 flow [2024-06-27 19:45:44,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:44,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:44,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:44,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 19:45:44,099 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:44,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1998822925, now seen corresponding path program 5 times [2024-06-27 19:45:44,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:44,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072722042] [2024-06-27 19:45:44,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:44,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:44,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:44,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:44,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:44,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072722042] [2024-06-27 19:45:44,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072722042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:44,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:44,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:44,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628381836] [2024-06-27 19:45:44,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:44,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:44,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:44,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:44,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:44,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:45:44,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 534 transitions, 6755 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:44,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:44,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:45:44,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:45:46,148 INFO L124 PetriNetUnfolderBase]: 5007/8668 cut-off events. [2024-06-27 19:45:46,148 INFO L125 PetriNetUnfolderBase]: For 1616870/1616870 co-relation queries the response was YES. [2024-06-27 19:45:46,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58329 conditions, 8668 events. 5007/8668 cut-off events. For 1616870/1616870 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64726 event pairs, 1304 based on Foata normal form. 1/8663 useless extension candidates. Maximal degree in co-relation 58112. Up to 7582 conditions per place. [2024-06-27 19:45:46,278 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 123 changer transitions 0/552 dead transitions. [2024-06-27 19:45:46,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 552 transitions, 8271 flow [2024-06-27 19:45:46,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:45:46,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:45:46,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-27 19:45:46,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-27 19:45:46,279 INFO L175 Difference]: Start difference. First operand has 435 places, 534 transitions, 6755 flow. Second operand 7 states and 181 transitions. [2024-06-27 19:45:46,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 552 transitions, 8271 flow [2024-06-27 19:45:58,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 552 transitions, 8013 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 19:45:58,708 INFO L231 Difference]: Finished difference. Result has 436 places, 537 transitions, 6809 flow [2024-06-27 19:45:58,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6809, PETRI_PLACES=436, PETRI_TRANSITIONS=537} [2024-06-27 19:45:58,708 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-27 19:45:58,708 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 537 transitions, 6809 flow [2024-06-27 19:45:58,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:58,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:45:58,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:45:58,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 19:45:58,708 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:45:58,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:45:58,709 INFO L85 PathProgramCache]: Analyzing trace with hash -2039442051, now seen corresponding path program 6 times [2024-06-27 19:45:58,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:45:58,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636913195] [2024-06-27 19:45:58,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:45:58,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:45:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:45:58,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:45:58,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:45:58,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636913195] [2024-06-27 19:45:58,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636913195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:45:58,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:45:58,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:45:58,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509284461] [2024-06-27 19:45:58,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:45:58,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:45:58,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:45:58,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:45:58,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:45:58,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:45:58,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 537 transitions, 6809 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:45:58,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:45:58,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:45:58,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:00,765 INFO L124 PetriNetUnfolderBase]: 5004/8664 cut-off events. [2024-06-27 19:46:00,765 INFO L125 PetriNetUnfolderBase]: For 1602329/1602329 co-relation queries the response was YES. [2024-06-27 19:46:00,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58109 conditions, 8664 events. 5004/8664 cut-off events. For 1602329/1602329 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64709 event pairs, 1304 based on Foata normal form. 1/8659 useless extension candidates. Maximal degree in co-relation 57892. Up to 7579 conditions per place. [2024-06-27 19:46:00,910 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 412 selfloop transitions, 130 changer transitions 0/551 dead transitions. [2024-06-27 19:46:00,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 551 transitions, 7927 flow [2024-06-27 19:46:00,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:46:00,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:46:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-27 19:46:00,911 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-27 19:46:00,911 INFO L175 Difference]: Start difference. First operand has 436 places, 537 transitions, 6809 flow. Second operand 7 states and 179 transitions. [2024-06-27 19:46:00,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 551 transitions, 7927 flow [2024-06-27 19:46:11,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 551 transitions, 7724 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 19:46:11,713 INFO L231 Difference]: Finished difference. Result has 438 places, 537 transitions, 6876 flow [2024-06-27 19:46:11,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6876, PETRI_PLACES=438, PETRI_TRANSITIONS=537} [2024-06-27 19:46:11,714 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 19:46:11,714 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 537 transitions, 6876 flow [2024-06-27 19:46:11,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:11,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:11,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:11,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 19:46:11,714 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:11,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1455190217, now seen corresponding path program 7 times [2024-06-27 19:46:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:11,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549915074] [2024-06-27 19:46:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:11,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:11,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:11,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549915074] [2024-06-27 19:46:11,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549915074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:11,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:11,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:11,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042663504] [2024-06-27 19:46:11,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:11,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:11,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:11,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:11,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:11,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:46:11,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 537 transitions, 6876 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:11,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:11,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:46:11,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:13,899 INFO L124 PetriNetUnfolderBase]: 5070/8756 cut-off events. [2024-06-27 19:46:13,899 INFO L125 PetriNetUnfolderBase]: For 1798146/1798146 co-relation queries the response was YES. [2024-06-27 19:46:14,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60606 conditions, 8756 events. 5070/8756 cut-off events. For 1798146/1798146 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 65522 event pairs, 1306 based on Foata normal form. 6/8738 useless extension candidates. Maximal degree in co-relation 60389. Up to 7445 conditions per place. [2024-06-27 19:46:14,036 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 449 selfloop transitions, 112 changer transitions 0/570 dead transitions. [2024-06-27 19:46:14,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 570 transitions, 8528 flow [2024-06-27 19:46:14,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:46:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:46:14,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-27 19:46:14,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-27 19:46:14,037 INFO L175 Difference]: Start difference. First operand has 438 places, 537 transitions, 6876 flow. Second operand 9 states and 228 transitions. [2024-06-27 19:46:14,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 570 transitions, 8528 flow [2024-06-27 19:46:26,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 570 transitions, 8173 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:46:26,933 INFO L231 Difference]: Finished difference. Result has 439 places, 539 transitions, 6850 flow [2024-06-27 19:46:26,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6523, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6850, PETRI_PLACES=439, PETRI_TRANSITIONS=539} [2024-06-27 19:46:26,933 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-27 19:46:26,933 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 539 transitions, 6850 flow [2024-06-27 19:46:26,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:26,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:46:26,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:46:26,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 19:46:26,934 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:46:26,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:46:26,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1026275039, now seen corresponding path program 8 times [2024-06-27 19:46:26,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:46:26,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630653478] [2024-06-27 19:46:26,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:46:26,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:46:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:46:27,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:46:27,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:46:27,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630653478] [2024-06-27 19:46:27,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630653478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:46:27,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:46:27,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:46:27,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360977507] [2024-06-27 19:46:27,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:46:27,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:46:27,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:46:27,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:46:27,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:46:27,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-27 19:46:27,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 539 transitions, 6850 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:46:27,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:46:27,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-27 19:46:27,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:46:29,086 INFO L124 PetriNetUnfolderBase]: 5052/8748 cut-off events. [2024-06-27 19:46:29,086 INFO L125 PetriNetUnfolderBase]: For 1711273/1711273 co-relation queries the response was YES. [2024-06-27 19:46:29,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59082 conditions, 8748 events. 5052/8748 cut-off events. For 1711273/1711273 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 65482 event pairs, 1342 based on Foata normal form. 8/8750 useless extension candidates. Maximal degree in co-relation 58865. Up to 7692 conditions per place. [2024-06-27 19:46:29,353 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 451 selfloop transitions, 101 changer transitions 0/561 dead transitions. [2024-06-27 19:46:29,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 561 transitions, 8020 flow [2024-06-27 19:46:29,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:46:29,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:46:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-27 19:46:29,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-27 19:46:29,354 INFO L175 Difference]: Start difference. First operand has 439 places, 539 transitions, 6850 flow. Second operand 8 states and 200 transitions. [2024-06-27 19:46:29,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 561 transitions, 8020 flow Killed by 15