./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe030_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe030_tso.i ./goblint.2024-05-21_14-57-05.files/protection/safe030_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-cde23df-m [2024-06-14 11:32:55,676 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:32:55,721 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:32:55,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:32:55,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:32:55,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:32:55,748 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:32:55,748 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:32:55,749 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:32:55,749 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:32:55,750 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:32:55,750 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:32:55,750 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:32:55,751 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:32:55,751 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:32:55,751 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:32:55,752 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:32:55,752 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:32:55,752 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:32:55,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:32:55,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:32:55,754 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:32:55,755 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:32:55,755 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:32:55,755 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:32:55,755 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:32:55,755 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:32:55,756 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:32:55,756 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:32:55,756 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:32:55,756 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:32:55,757 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:32:55,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:32:55,757 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:32:55,758 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:32:55,758 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:32:55,759 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:32:55,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:32:55,759 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:32:55,759 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:32:55,760 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:32:55,760 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:32:55,760 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:32:55,760 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:32:55,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:32:55,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:32:55,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:32:55,941 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:32:55,942 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:32:55,943 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-14 11:32:57,055 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:32:57,312 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:32:57,323 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe030_tso.i [2024-06-14 11:32:57,334 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99a540f55/775f3cc6a7594662a1e0b477fc0abed8/FLAG3c82a1a1a [2024-06-14 11:32:57,360 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99a540f55/775f3cc6a7594662a1e0b477fc0abed8 [2024-06-14 11:32:57,362 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:32:57,362 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:32:57,363 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe030_tso.yml/witness.yml [2024-06-14 11:32:57,445 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:32:57,446 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:32:57,447 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:32:57,447 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:32:57,453 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:32:57,453 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:32:57" (1/2) ... [2024-06-14 11:32:57,454 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b10d894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:32:57, skipping insertion in model container [2024-06-14 11:32:57,454 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:32:57" (1/2) ... [2024-06-14 11:32:57,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@29c56eac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:32:57, skipping insertion in model container [2024-06-14 11:32:57,455 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:32:57" (2/2) ... [2024-06-14 11:32:57,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b10d894 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57, skipping insertion in model container [2024-06-14 11:32:57,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:32:57" (2/2) ... [2024-06-14 11:32:57,456 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:32:57,484 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:32:57,484 INFO L97 edCorrectnessWitness]: Location invariant before [L777-L777] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-14 11:32:57,485 INFO L97 edCorrectnessWitness]: Location invariant before [L780-L780] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-14 11:32:57,485 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2))) [2024-06-14 11:32:57,485 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:32:57,485 INFO L106 edCorrectnessWitness]: ghost_update [L775-L775] multithreaded = 1; [2024-06-14 11:32:57,518 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:32:57,770 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:32:57,777 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:32:57,855 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:32:57,879 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:32:57,880 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57 WrapperNode [2024-06-14 11:32:57,880 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:32:57,881 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:32:57,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:32:57,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:32:57,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,895 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,915 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 64 [2024-06-14 11:32:57,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:32:57,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:32:57,919 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:32:57,919 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:32:57,927 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,933 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,957 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]. [2024-06-14 11:32:57,957 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,957 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,963 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,965 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,967 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,967 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:32:57,970 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:32:57,970 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:32:57,970 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:32:57,971 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (1/1) ... [2024-06-14 11:32:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:32:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:32:58,002 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) [2024-06-14 11:32:58,004 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 [2024-06-14 11:32:58,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:32:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:32:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:32:58,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:32:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:32:58,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:32:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:32:58,028 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:32:58,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:32:58,029 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:32:58,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:32:58,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:32:58,030 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:32:58,136 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:32:58,138 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:32:58,353 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:32:58,354 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:32:58,444 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:32:58,445 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:32:58,445 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:32:58 BoogieIcfgContainer [2024-06-14 11:32:58,446 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:32:58,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:32:58,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:32:58,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:32:58,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:32:57" (1/4) ... [2024-06-14 11:32:58,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5764c94a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:32:58, skipping insertion in model container [2024-06-14 11:32:58,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:32:57" (2/4) ... [2024-06-14 11:32:58,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5764c94a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:32:58, skipping insertion in model container [2024-06-14 11:32:58,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:32:57" (3/4) ... [2024-06-14 11:32:58,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5764c94a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:32:58, skipping insertion in model container [2024-06-14 11:32:58,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:32:58" (4/4) ... [2024-06-14 11:32:58,455 INFO L112 eAbstractionObserver]: Analyzing ICFG safe030_tso.i [2024-06-14 11:32:58,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:32:58,469 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 11:32:58,469 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:32:58,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:32:58,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:32:58,564 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 11:32:58,564 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:32:58,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:32:58,567 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 11:32:58,569 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 11:32:58,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:32:58,586 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;@49b3b90f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:32:58,587 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 11:32:58,591 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:32:58,591 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 11:32:58,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:32:58,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:58,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:32:58,592 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)] === [2024-06-14 11:32:58,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2004445253, now seen corresponding path program 1 times [2024-06-14 11:32:58,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:58,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391479382] [2024-06-14 11:32:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:58,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:58,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:58,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391479382] [2024-06-14 11:32:58,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391479382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:58,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:58,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:32:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267501730] [2024-06-14 11:32:58,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:58,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:32:58,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:58,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:32:58,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:32:58,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:58,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:58,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:58,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:58,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:59,137 INFO L124 PetriNetUnfolderBase]: 946/1512 cut-off events. [2024-06-14 11:32:59,137 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-14 11:32:59,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3020 conditions, 1512 events. 946/1512 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7444 event pairs, 638 based on Foata normal form. 1/1443 useless extension candidates. Maximal degree in co-relation 3005. Up to 1431 conditions per place. [2024-06-14 11:32:59,152 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 32 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 11:32:59,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 171 flow [2024-06-14 11:32:59,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:32:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:32:59,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-14 11:32:59,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 11:32:59,163 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 78 transitions. [2024-06-14 11:32:59,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 171 flow [2024-06-14 11:32:59,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 11:32:59,167 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 11:32:59,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 11:32:59,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 11:32:59,171 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 11:32:59,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:59,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:59,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:32:59,172 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)] === [2024-06-14 11:32:59,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:59,173 INFO L85 PathProgramCache]: Analyzing trace with hash -2126518694, now seen corresponding path program 1 times [2024-06-14 11:32:59,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:59,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528110194] [2024-06-14 11:32:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:59,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:59,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:59,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528110194] [2024-06-14 11:32:59,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528110194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:59,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:59,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:32:59,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464077453] [2024-06-14 11:32:59,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:59,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:32:59,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:59,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:32:59,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:32:59,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:59,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:59,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:59,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:59,558 INFO L124 PetriNetUnfolderBase]: 940/1508 cut-off events. [2024-06-14 11:32:59,558 INFO L125 PetriNetUnfolderBase]: For 273/273 co-relation queries the response was YES. [2024-06-14 11:32:59,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3431 conditions, 1508 events. 940/1508 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7444 event pairs, 532 based on Foata normal form. 3/1474 useless extension candidates. Maximal degree in co-relation 3416. Up to 1407 conditions per place. [2024-06-14 11:32:59,567 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 39 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-06-14 11:32:59,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 238 flow [2024-06-14 11:32:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:32:59,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:32:59,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-14 11:32:59,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6158536585365854 [2024-06-14 11:32:59,572 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-06-14 11:32:59,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 238 flow [2024-06-14 11:32:59,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 52 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:32:59,574 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-14 11:32:59,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-14 11:32:59,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-14 11:32:59,576 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-14 11:32:59,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:59,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:59,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:32:59,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:32:59,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:59,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1497569362, now seen corresponding path program 1 times [2024-06-14 11:32:59,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:59,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907623797] [2024-06-14 11:32:59,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:59,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:59,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:59,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907623797] [2024-06-14 11:32:59,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907623797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:59,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:59,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:32:59,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685410862] [2024-06-14 11:32:59,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:59,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:32:59,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:32:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:32:59,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:59,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:59,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:59,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:32:59,846 INFO L124 PetriNetUnfolderBase]: 948/1554 cut-off events. [2024-06-14 11:32:59,846 INFO L125 PetriNetUnfolderBase]: For 829/829 co-relation queries the response was YES. [2024-06-14 11:32:59,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3904 conditions, 1554 events. 948/1554 cut-off events. For 829/829 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7855 event pairs, 366 based on Foata normal form. 5/1542 useless extension candidates. Maximal degree in co-relation 3887. Up to 1353 conditions per place. [2024-06-14 11:32:59,854 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 52 selfloop transitions, 16 changer transitions 0/74 dead transitions. [2024-06-14 11:32:59,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 74 transitions, 392 flow [2024-06-14 11:32:59,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:32:59,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:32:59,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-14 11:32:59,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6439024390243903 [2024-06-14 11:32:59,856 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 5 states and 132 transitions. [2024-06-14 11:32:59,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 74 transitions, 392 flow [2024-06-14 11:32:59,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 74 transitions, 378 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 11:32:59,858 INFO L231 Difference]: Finished difference. Result has 50 places, 49 transitions, 235 flow [2024-06-14 11:32:59,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=235, PETRI_PLACES=50, PETRI_TRANSITIONS=49} [2024-06-14 11:32:59,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-14 11:32:59,859 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 49 transitions, 235 flow [2024-06-14 11:32:59,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,860 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:32:59,860 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:32:59,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:32:59,860 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)] === [2024-06-14 11:32:59,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:32:59,860 INFO L85 PathProgramCache]: Analyzing trace with hash -350088915, now seen corresponding path program 1 times [2024-06-14 11:32:59,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:32:59,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669955034] [2024-06-14 11:32:59,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:32:59,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:32:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:32:59,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:32:59,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:32:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669955034] [2024-06-14 11:32:59,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669955034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:32:59,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:32:59,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:32:59,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833442978] [2024-06-14 11:32:59,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:32:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:32:59,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:32:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:32:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:32:59,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:32:59,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 49 transitions, 235 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:32:59,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:32:59,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:32:59,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:00,193 INFO L124 PetriNetUnfolderBase]: 960/1574 cut-off events. [2024-06-14 11:33:00,194 INFO L125 PetriNetUnfolderBase]: For 1961/1963 co-relation queries the response was YES. [2024-06-14 11:33:00,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4718 conditions, 1574 events. 960/1574 cut-off events. For 1961/1963 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7975 event pairs, 245 based on Foata normal form. 12/1569 useless extension candidates. Maximal degree in co-relation 4698. Up to 1321 conditions per place. [2024-06-14 11:33:00,203 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 19 changer transitions 0/81 dead transitions. [2024-06-14 11:33:00,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 81 transitions, 495 flow [2024-06-14 11:33:00,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:00,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:00,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:33:00,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 11:33:00,205 INFO L175 Difference]: Start difference. First operand has 50 places, 49 transitions, 235 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:33:00,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 81 transitions, 495 flow [2024-06-14 11:33:00,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 81 transitions, 487 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:00,209 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 291 flow [2024-06-14 11:33:00,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 11:33:00,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 11:33:00,210 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 291 flow [2024-06-14 11:33:00,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:00,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:00,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:00,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:33:00,211 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)] === [2024-06-14 11:33:00,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:00,211 INFO L85 PathProgramCache]: Analyzing trace with hash -734151125, now seen corresponding path program 1 times [2024-06-14 11:33:00,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:00,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992248001] [2024-06-14 11:33:00,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:00,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:00,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:00,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992248001] [2024-06-14 11:33:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992248001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:00,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:33:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447310279] [2024-06-14 11:33:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:00,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:33:00,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:00,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:33:00,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:33:00,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:00,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 291 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:00,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:00,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:00,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:00,460 INFO L124 PetriNetUnfolderBase]: 955/1562 cut-off events. [2024-06-14 11:33:00,460 INFO L125 PetriNetUnfolderBase]: For 2897/2897 co-relation queries the response was YES. [2024-06-14 11:33:00,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5151 conditions, 1562 events. 955/1562 cut-off events. For 2897/2897 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7874 event pairs, 354 based on Foata normal form. 2/1545 useless extension candidates. Maximal degree in co-relation 5128. Up to 1438 conditions per place. [2024-06-14 11:33:00,468 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 49 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-06-14 11:33:00,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 62 transitions, 431 flow [2024-06-14 11:33:00,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:33:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:33:00,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 11:33:00,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:33:00,470 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 291 flow. Second operand 4 states and 96 transitions. [2024-06-14 11:33:00,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 62 transitions, 431 flow [2024-06-14 11:33:00,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 62 transitions, 381 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:00,477 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 263 flow [2024-06-14 11:33:00,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=263, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 11:33:00,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 11:33:00,479 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 263 flow [2024-06-14 11:33:00,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:00,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:00,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:00,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:33:00,481 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)] === [2024-06-14 11:33:00,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1299559337, now seen corresponding path program 1 times [2024-06-14 11:33:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:00,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190677668] [2024-06-14 11:33:00,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:00,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:00,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:00,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:00,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190677668] [2024-06-14 11:33:00,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190677668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:00,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:00,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:00,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557079059] [2024-06-14 11:33:00,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:00,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:00,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:00,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:00,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:00,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 263 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:00,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:00,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:00,700 INFO L124 PetriNetUnfolderBase]: 957/1575 cut-off events. [2024-06-14 11:33:00,701 INFO L125 PetriNetUnfolderBase]: For 3325/3325 co-relation queries the response was YES. [2024-06-14 11:33:00,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5140 conditions, 1575 events. 957/1575 cut-off events. For 3325/3325 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7864 event pairs, 335 based on Foata normal form. 3/1576 useless extension candidates. Maximal degree in co-relation 5116. Up to 1413 conditions per place. [2024-06-14 11:33:00,709 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 57 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-14 11:33:00,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 79 transitions, 525 flow [2024-06-14 11:33:00,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:00,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:00,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-14 11:33:00,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-14 11:33:00,711 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 263 flow. Second operand 5 states and 122 transitions. [2024-06-14 11:33:00,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 79 transitions, 525 flow [2024-06-14 11:33:00,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 79 transitions, 505 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:00,714 INFO L231 Difference]: Finished difference. Result has 59 places, 62 transitions, 366 flow [2024-06-14 11:33:00,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=366, PETRI_PLACES=59, PETRI_TRANSITIONS=62} [2024-06-14 11:33:00,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-14 11:33:00,715 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 62 transitions, 366 flow [2024-06-14 11:33:00,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:00,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:00,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:00,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:33:00,716 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)] === [2024-06-14 11:33:00,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:00,716 INFO L85 PathProgramCache]: Analyzing trace with hash -1637354200, now seen corresponding path program 1 times [2024-06-14 11:33:00,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:00,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679654310] [2024-06-14 11:33:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:00,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:00,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:00,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:00,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679654310] [2024-06-14 11:33:00,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679654310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:00,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:00,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:00,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458148729] [2024-06-14 11:33:00,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:00,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:00,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:00,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:00,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:00,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:00,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 62 transitions, 366 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:00,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:00,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:00,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:00,947 INFO L124 PetriNetUnfolderBase]: 963/1594 cut-off events. [2024-06-14 11:33:00,947 INFO L125 PetriNetUnfolderBase]: For 4989/4993 co-relation queries the response was YES. [2024-06-14 11:33:00,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5822 conditions, 1594 events. 963/1594 cut-off events. For 4989/4993 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7994 event pairs, 337 based on Foata normal form. 8/1599 useless extension candidates. Maximal degree in co-relation 5796. Up to 1375 conditions per place. [2024-06-14 11:33:00,957 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 18 changer transitions 0/85 dead transitions. [2024-06-14 11:33:00,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 620 flow [2024-06-14 11:33:00,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:00,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:00,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-14 11:33:00,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:33:00,958 INFO L175 Difference]: Start difference. First operand has 59 places, 62 transitions, 366 flow. Second operand 5 states and 125 transitions. [2024-06-14 11:33:00,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 620 flow [2024-06-14 11:33:00,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 85 transitions, 606 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:00,964 INFO L231 Difference]: Finished difference. Result has 64 places, 65 transitions, 422 flow [2024-06-14 11:33:00,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=422, PETRI_PLACES=64, PETRI_TRANSITIONS=65} [2024-06-14 11:33:00,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-14 11:33:00,965 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 65 transitions, 422 flow [2024-06-14 11:33:00,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:00,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:00,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:00,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:33:00,965 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:00,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1144557430, now seen corresponding path program 2 times [2024-06-14 11:33:00,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:00,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117028532] [2024-06-14 11:33:00,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:00,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:01,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:01,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:01,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117028532] [2024-06-14 11:33:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117028532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:01,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:01,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:01,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479147892] [2024-06-14 11:33:01,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:01,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:01,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:01,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:01,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 65 transitions, 422 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:01,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:01,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:01,191 INFO L124 PetriNetUnfolderBase]: 951/1567 cut-off events. [2024-06-14 11:33:01,191 INFO L125 PetriNetUnfolderBase]: For 5758/5764 co-relation queries the response was YES. [2024-06-14 11:33:01,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5893 conditions, 1567 events. 951/1567 cut-off events. For 5758/5764 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7806 event pairs, 351 based on Foata normal form. 3/1564 useless extension candidates. Maximal degree in co-relation 5864. Up to 1359 conditions per place. [2024-06-14 11:33:01,202 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 55 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-14 11:33:01,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 80 transitions, 608 flow [2024-06-14 11:33:01,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:01,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:01,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 11:33:01,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 11:33:01,204 INFO L175 Difference]: Start difference. First operand has 64 places, 65 transitions, 422 flow. Second operand 5 states and 121 transitions. [2024-06-14 11:33:01,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 80 transitions, 608 flow [2024-06-14 11:33:01,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 80 transitions, 581 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:01,211 INFO L231 Difference]: Finished difference. Result has 67 places, 65 transitions, 441 flow [2024-06-14 11:33:01,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=395, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=441, PETRI_PLACES=67, PETRI_TRANSITIONS=65} [2024-06-14 11:33:01,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-14 11:33:01,212 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 65 transitions, 441 flow [2024-06-14 11:33:01,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:01,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:01,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:33:01,212 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)] === [2024-06-14 11:33:01,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:01,213 INFO L85 PathProgramCache]: Analyzing trace with hash -194722984, now seen corresponding path program 1 times [2024-06-14 11:33:01,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:01,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070881675] [2024-06-14 11:33:01,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:01,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:01,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:01,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:01,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070881675] [2024-06-14 11:33:01,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070881675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:01,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:01,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:01,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688601187] [2024-06-14 11:33:01,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:01,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:01,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:01,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:01,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:01,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:01,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 65 transitions, 441 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:01,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:01,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:01,470 INFO L124 PetriNetUnfolderBase]: 1097/1792 cut-off events. [2024-06-14 11:33:01,471 INFO L125 PetriNetUnfolderBase]: For 7362/7366 co-relation queries the response was YES. [2024-06-14 11:33:01,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6825 conditions, 1792 events. 1097/1792 cut-off events. For 7362/7366 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9165 event pairs, 302 based on Foata normal form. 9/1791 useless extension candidates. Maximal degree in co-relation 6795. Up to 1233 conditions per place. [2024-06-14 11:33:01,482 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 77 selfloop transitions, 35 changer transitions 0/118 dead transitions. [2024-06-14 11:33:01,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 118 transitions, 947 flow [2024-06-14 11:33:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:01,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-14 11:33:01,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6544715447154471 [2024-06-14 11:33:01,483 INFO L175 Difference]: Start difference. First operand has 67 places, 65 transitions, 441 flow. Second operand 6 states and 161 transitions. [2024-06-14 11:33:01,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 118 transitions, 947 flow [2024-06-14 11:33:01,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 118 transitions, 884 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:01,495 INFO L231 Difference]: Finished difference. Result has 71 places, 86 transitions, 627 flow [2024-06-14 11:33:01,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=627, PETRI_PLACES=71, PETRI_TRANSITIONS=86} [2024-06-14 11:33:01,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 11:33:01,496 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 86 transitions, 627 flow [2024-06-14 11:33:01,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:01,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:01,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:33:01,497 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)] === [2024-06-14 11:33:01,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1121540554, now seen corresponding path program 2 times [2024-06-14 11:33:01,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:01,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792252909] [2024-06-14 11:33:01,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:01,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:01,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:01,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792252909] [2024-06-14 11:33:01,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792252909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:01,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:01,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:01,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887142480] [2024-06-14 11:33:01,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:01,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:01,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:01,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:01,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:01,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:01,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 86 transitions, 627 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:01,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:01,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:01,757 INFO L124 PetriNetUnfolderBase]: 1138/1861 cut-off events. [2024-06-14 11:33:01,758 INFO L125 PetriNetUnfolderBase]: For 10869/10875 co-relation queries the response was YES. [2024-06-14 11:33:01,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8465 conditions, 1861 events. 1138/1861 cut-off events. For 10869/10875 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 9619 event pairs, 326 based on Foata normal form. 5/1859 useless extension candidates. Maximal degree in co-relation 8431. Up to 1262 conditions per place. [2024-06-14 11:33:01,769 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 79 selfloop transitions, 46 changer transitions 0/131 dead transitions. [2024-06-14 11:33:01,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 131 transitions, 1220 flow [2024-06-14 11:33:01,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:01,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:33:01,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-14 11:33:01,771 INFO L175 Difference]: Start difference. First operand has 71 places, 86 transitions, 627 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:33:01,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 131 transitions, 1220 flow [2024-06-14 11:33:01,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 131 transitions, 1180 flow, removed 20 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:01,782 INFO L231 Difference]: Finished difference. Result has 80 places, 103 transitions, 912 flow [2024-06-14 11:33:01,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=595, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=912, PETRI_PLACES=80, PETRI_TRANSITIONS=103} [2024-06-14 11:33:01,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-14 11:33:01,783 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 103 transitions, 912 flow [2024-06-14 11:33:01,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:01,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:01,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:33:01,784 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)] === [2024-06-14 11:33:01,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:01,784 INFO L85 PathProgramCache]: Analyzing trace with hash 958997430, now seen corresponding path program 3 times [2024-06-14 11:33:01,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:01,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479727787] [2024-06-14 11:33:01,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:01,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:01,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479727787] [2024-06-14 11:33:01,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479727787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:01,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062270161] [2024-06-14 11:33:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:01,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:01,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 103 transitions, 912 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:01,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:01,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:01,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:02,087 INFO L124 PetriNetUnfolderBase]: 1171/1916 cut-off events. [2024-06-14 11:33:02,087 INFO L125 PetriNetUnfolderBase]: For 14483/14489 co-relation queries the response was YES. [2024-06-14 11:33:02,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9748 conditions, 1916 events. 1171/1916 cut-off events. For 14483/14489 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9962 event pairs, 328 based on Foata normal form. 5/1914 useless extension candidates. Maximal degree in co-relation 9708. Up to 1290 conditions per place. [2024-06-14 11:33:02,100 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 75 selfloop transitions, 58 changer transitions 0/139 dead transitions. [2024-06-14 11:33:02,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 139 transitions, 1466 flow [2024-06-14 11:33:02,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:02,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:02,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 11:33:02,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6382113821138211 [2024-06-14 11:33:02,102 INFO L175 Difference]: Start difference. First operand has 80 places, 103 transitions, 912 flow. Second operand 6 states and 157 transitions. [2024-06-14 11:33:02,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 139 transitions, 1466 flow [2024-06-14 11:33:02,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1434 flow, removed 16 selfloop flow, removed 0 redundant places. [2024-06-14 11:33:02,121 INFO L231 Difference]: Finished difference. Result has 88 places, 114 transitions, 1196 flow [2024-06-14 11:33:02,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=882, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1196, PETRI_PLACES=88, PETRI_TRANSITIONS=114} [2024-06-14 11:33:02,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 46 predicate places. [2024-06-14 11:33:02,121 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 114 transitions, 1196 flow [2024-06-14 11:33:02,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:02,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:02,122 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:02,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:33:02,122 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)] === [2024-06-14 11:33:02,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:02,122 INFO L85 PathProgramCache]: Analyzing trace with hash 959006358, now seen corresponding path program 1 times [2024-06-14 11:33:02,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:02,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643686916] [2024-06-14 11:33:02,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:02,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:02,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:02,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643686916] [2024-06-14 11:33:02,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643686916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:02,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:02,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:02,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816852075] [2024-06-14 11:33:02,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:02,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:02,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:02,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:02,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:02,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:02,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 114 transitions, 1196 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:02,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:02,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:02,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:02,432 INFO L124 PetriNetUnfolderBase]: 1174/1928 cut-off events. [2024-06-14 11:33:02,432 INFO L125 PetriNetUnfolderBase]: For 16838/16838 co-relation queries the response was YES. [2024-06-14 11:33:02,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10571 conditions, 1928 events. 1174/1928 cut-off events. For 16838/16838 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 9977 event pairs, 293 based on Foata normal form. 6/1932 useless extension candidates. Maximal degree in co-relation 10526. Up to 1689 conditions per place. [2024-06-14 11:33:02,446 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 114 selfloop transitions, 19 changer transitions 0/139 dead transitions. [2024-06-14 11:33:02,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 139 transitions, 1592 flow [2024-06-14 11:33:02,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:02,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:02,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:33:02,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 11:33:02,447 INFO L175 Difference]: Start difference. First operand has 88 places, 114 transitions, 1196 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:33:02,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 139 transitions, 1592 flow [2024-06-14 11:33:02,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 139 transitions, 1512 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:02,469 INFO L231 Difference]: Finished difference. Result has 92 places, 117 transitions, 1200 flow [2024-06-14 11:33:02,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1200, PETRI_PLACES=92, PETRI_TRANSITIONS=117} [2024-06-14 11:33:02,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 11:33:02,470 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 117 transitions, 1200 flow [2024-06-14 11:33:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:02,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:02,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:02,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:33:02,471 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash -85374098, now seen corresponding path program 1 times [2024-06-14 11:33:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:02,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912428485] [2024-06-14 11:33:02,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:02,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:02,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:02,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912428485] [2024-06-14 11:33:02,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912428485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:02,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:02,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:33:02,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307059639] [2024-06-14 11:33:02,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:02,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:33:02,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:33:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:33:02,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:02,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 117 transitions, 1200 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:02,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:02,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:02,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:02,745 INFO L124 PetriNetUnfolderBase]: 1171/1922 cut-off events. [2024-06-14 11:33:02,745 INFO L125 PetriNetUnfolderBase]: For 17353/17353 co-relation queries the response was YES. [2024-06-14 11:33:02,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10471 conditions, 1922 events. 1171/1922 cut-off events. For 17353/17353 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 9942 event pairs, 312 based on Foata normal form. 1/1921 useless extension candidates. Maximal degree in co-relation 10425. Up to 1745 conditions per place. [2024-06-14 11:33:02,759 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 112 selfloop transitions, 7 changer transitions 0/125 dead transitions. [2024-06-14 11:33:02,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 125 transitions, 1458 flow [2024-06-14 11:33:02,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:33:02,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:33:02,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-14 11:33:02,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:33:02,761 INFO L175 Difference]: Start difference. First operand has 92 places, 117 transitions, 1200 flow. Second operand 4 states and 92 transitions. [2024-06-14 11:33:02,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 125 transitions, 1458 flow [2024-06-14 11:33:02,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 125 transitions, 1392 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:02,786 INFO L231 Difference]: Finished difference. Result has 92 places, 117 transitions, 1154 flow [2024-06-14 11:33:02,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1154, PETRI_PLACES=92, PETRI_TRANSITIONS=117} [2024-06-14 11:33:02,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 11:33:02,787 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 117 transitions, 1154 flow [2024-06-14 11:33:02,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:02,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:02,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:02,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:33:02,787 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)] === [2024-06-14 11:33:02,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:02,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1919679146, now seen corresponding path program 1 times [2024-06-14 11:33:02,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:02,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788957311] [2024-06-14 11:33:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:02,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:02,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:02,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:02,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788957311] [2024-06-14 11:33:02,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788957311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:02,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:02,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:02,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752705916] [2024-06-14 11:33:02,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:02,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:02,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:02,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:02,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:02,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:02,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 117 transitions, 1154 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:02,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:02,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:02,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:03,082 INFO L124 PetriNetUnfolderBase]: 1196/1957 cut-off events. [2024-06-14 11:33:03,083 INFO L125 PetriNetUnfolderBase]: For 19258/19262 co-relation queries the response was YES. [2024-06-14 11:33:03,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 1957 events. 1196/1957 cut-off events. For 19258/19262 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10131 event pairs, 303 based on Foata normal form. 5/1951 useless extension candidates. Maximal degree in co-relation 10608. Up to 1320 conditions per place. [2024-06-14 11:33:03,096 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 89 selfloop transitions, 63 changer transitions 0/158 dead transitions. [2024-06-14 11:33:03,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 158 transitions, 1778 flow [2024-06-14 11:33:03,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:03,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 11:33:03,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626016260162602 [2024-06-14 11:33:03,097 INFO L175 Difference]: Start difference. First operand has 92 places, 117 transitions, 1154 flow. Second operand 6 states and 163 transitions. [2024-06-14 11:33:03,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 158 transitions, 1778 flow [2024-06-14 11:33:03,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 158 transitions, 1756 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:03,122 INFO L231 Difference]: Finished difference. Result has 97 places, 127 transitions, 1449 flow [2024-06-14 11:33:03,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1132, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1449, PETRI_PLACES=97, PETRI_TRANSITIONS=127} [2024-06-14 11:33:03,123 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-14 11:33:03,123 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 127 transitions, 1449 flow [2024-06-14 11:33:03,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:03,124 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:03,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:33:03,124 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)] === [2024-06-14 11:33:03,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:03,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1919673566, now seen corresponding path program 2 times [2024-06-14 11:33:03,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:03,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808374338] [2024-06-14 11:33:03,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:03,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:03,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:03,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:03,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808374338] [2024-06-14 11:33:03,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808374338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:03,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:03,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:03,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781561689] [2024-06-14 11:33:03,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:03,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:03,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:03,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:03,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:03,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:03,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 127 transitions, 1449 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:03,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:03,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:03,444 INFO L124 PetriNetUnfolderBase]: 1221/2004 cut-off events. [2024-06-14 11:33:03,444 INFO L125 PetriNetUnfolderBase]: For 23635/23639 co-relation queries the response was YES. [2024-06-14 11:33:03,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11975 conditions, 2004 events. 1221/2004 cut-off events. For 23635/23639 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 10462 event pairs, 303 based on Foata normal form. 5/1998 useless extension candidates. Maximal degree in co-relation 11926. Up to 1345 conditions per place. [2024-06-14 11:33:03,459 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 88 selfloop transitions, 65 changer transitions 0/159 dead transitions. [2024-06-14 11:33:03,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 2003 flow [2024-06-14 11:33:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:03,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:03,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 11:33:03,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-14 11:33:03,461 INFO L175 Difference]: Start difference. First operand has 97 places, 127 transitions, 1449 flow. Second operand 6 states and 158 transitions. [2024-06-14 11:33:03,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 2003 flow [2024-06-14 11:33:03,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 159 transitions, 1906 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:03,492 INFO L231 Difference]: Finished difference. Result has 101 places, 132 transitions, 1563 flow [2024-06-14 11:33:03,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1358, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1563, PETRI_PLACES=101, PETRI_TRANSITIONS=132} [2024-06-14 11:33:03,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 11:33:03,493 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 132 transitions, 1563 flow [2024-06-14 11:33:03,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:03,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:03,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:33:03,493 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:03,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:03,494 INFO L85 PathProgramCache]: Analyzing trace with hash 439085236, now seen corresponding path program 3 times [2024-06-14 11:33:03,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:03,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040863013] [2024-06-14 11:33:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:03,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:03,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:03,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040863013] [2024-06-14 11:33:03,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040863013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:03,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:03,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:03,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292879032] [2024-06-14 11:33:03,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:03,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:03,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:03,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:03,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:03,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:03,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 132 transitions, 1563 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:03,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:03,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:03,837 INFO L124 PetriNetUnfolderBase]: 1238/2052 cut-off events. [2024-06-14 11:33:03,837 INFO L125 PetriNetUnfolderBase]: For 27353/27366 co-relation queries the response was YES. [2024-06-14 11:33:03,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12422 conditions, 2052 events. 1238/2052 cut-off events. For 27353/27366 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10915 event pairs, 356 based on Foata normal form. 10/2058 useless extension candidates. Maximal degree in co-relation 12372. Up to 1365 conditions per place. [2024-06-14 11:33:03,855 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 64 changer transitions 0/162 dead transitions. [2024-06-14 11:33:03,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 162 transitions, 2107 flow [2024-06-14 11:33:03,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:03,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 11:33:03,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 11:33:03,857 INFO L175 Difference]: Start difference. First operand has 101 places, 132 transitions, 1563 flow. Second operand 6 states and 152 transitions. [2024-06-14 11:33:03,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 162 transitions, 2107 flow [2024-06-14 11:33:03,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 162 transitions, 1988 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:03,891 INFO L231 Difference]: Finished difference. Result has 105 places, 141 transitions, 1744 flow [2024-06-14 11:33:03,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1744, PETRI_PLACES=105, PETRI_TRANSITIONS=141} [2024-06-14 11:33:03,892 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-14 11:33:03,892 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 141 transitions, 1744 flow [2024-06-14 11:33:03,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:03,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:03,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:33:03,893 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)] === [2024-06-14 11:33:03,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:03,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1648371972, now seen corresponding path program 1 times [2024-06-14 11:33:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421314454] [2024-06-14 11:33:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:03,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:03,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:03,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:03,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421314454] [2024-06-14 11:33:03,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421314454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:03,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:03,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:03,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208887496] [2024-06-14 11:33:03,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:03,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:03,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:03,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:03,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:03,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:03,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 141 transitions, 1744 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:03,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:03,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:03,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:04,189 INFO L124 PetriNetUnfolderBase]: 1234/2047 cut-off events. [2024-06-14 11:33:04,190 INFO L125 PetriNetUnfolderBase]: For 29086/29097 co-relation queries the response was YES. [2024-06-14 11:33:04,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12828 conditions, 2047 events. 1234/2047 cut-off events. For 29086/29097 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10845 event pairs, 311 based on Foata normal form. 10/2054 useless extension candidates. Maximal degree in co-relation 12776. Up to 1804 conditions per place. [2024-06-14 11:33:04,206 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 131 selfloop transitions, 16 changer transitions 0/153 dead transitions. [2024-06-14 11:33:04,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 153 transitions, 2125 flow [2024-06-14 11:33:04,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:04,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:04,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-14 11:33:04,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 11:33:04,207 INFO L175 Difference]: Start difference. First operand has 105 places, 141 transitions, 1744 flow. Second operand 5 states and 114 transitions. [2024-06-14 11:33:04,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 153 transitions, 2125 flow [2024-06-14 11:33:04,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 153 transitions, 2047 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:04,243 INFO L231 Difference]: Finished difference. Result has 108 places, 143 transitions, 1741 flow [2024-06-14 11:33:04,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1667, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1741, PETRI_PLACES=108, PETRI_TRANSITIONS=143} [2024-06-14 11:33:04,244 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-14 11:33:04,244 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 143 transitions, 1741 flow [2024-06-14 11:33:04,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:04,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:04,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:04,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:33:04,244 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:04,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:04,245 INFO L85 PathProgramCache]: Analyzing trace with hash -733954153, now seen corresponding path program 1 times [2024-06-14 11:33:04,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:04,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444896394] [2024-06-14 11:33:04,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:04,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:04,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:04,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:04,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444896394] [2024-06-14 11:33:04,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444896394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:04,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:04,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:04,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99367333] [2024-06-14 11:33:04,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:04,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:04,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:04,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:04,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:04,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:04,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 143 transitions, 1741 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:04,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:04,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:04,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:04,582 INFO L124 PetriNetUnfolderBase]: 1251/2072 cut-off events. [2024-06-14 11:33:04,582 INFO L125 PetriNetUnfolderBase]: For 31511/31515 co-relation queries the response was YES. [2024-06-14 11:33:04,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12775 conditions, 2072 events. 1251/2072 cut-off events. For 31511/31515 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10955 event pairs, 197 based on Foata normal form. 8/2078 useless extension candidates. Maximal degree in co-relation 12721. Up to 1691 conditions per place. [2024-06-14 11:33:04,600 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 145 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-14 11:33:04,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 173 transitions, 2283 flow [2024-06-14 11:33:04,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:04,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:04,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:33:04,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 11:33:04,602 INFO L175 Difference]: Start difference. First operand has 108 places, 143 transitions, 1741 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:33:04,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 173 transitions, 2283 flow [2024-06-14 11:33:04,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 173 transitions, 2187 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:04,644 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1780 flow [2024-06-14 11:33:04,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1645, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1780, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-14 11:33:04,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-14 11:33:04,645 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1780 flow [2024-06-14 11:33:04,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:04,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:04,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:04,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:33:04,646 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)] === [2024-06-14 11:33:04,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:04,646 INFO L85 PathProgramCache]: Analyzing trace with hash -592264739, now seen corresponding path program 2 times [2024-06-14 11:33:04,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:04,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338425064] [2024-06-14 11:33:04,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:04,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:04,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:04,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338425064] [2024-06-14 11:33:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338425064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:04,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:04,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212656293] [2024-06-14 11:33:04,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:04,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:04,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:04,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:04,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:04,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:04,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1780 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:04,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:04,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:04,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:04,981 INFO L124 PetriNetUnfolderBase]: 1243/2060 cut-off events. [2024-06-14 11:33:04,982 INFO L125 PetriNetUnfolderBase]: For 33487/33491 co-relation queries the response was YES. [2024-06-14 11:33:04,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12640 conditions, 2060 events. 1243/2060 cut-off events. For 33487/33491 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10871 event pairs, 281 based on Foata normal form. 8/2066 useless extension candidates. Maximal degree in co-relation 12586. Up to 1756 conditions per place. [2024-06-14 11:33:04,997 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 144 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2024-06-14 11:33:04,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 170 transitions, 2166 flow [2024-06-14 11:33:04,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:04,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:33:04,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 11:33:04,999 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1780 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:33:04,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 170 transitions, 2166 flow [2024-06-14 11:33:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 170 transitions, 2045 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:05,053 INFO L231 Difference]: Finished difference. Result has 114 places, 147 transitions, 1706 flow [2024-06-14 11:33:05,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1659, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1706, PETRI_PLACES=114, PETRI_TRANSITIONS=147} [2024-06-14 11:33:05,054 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 11:33:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 147 transitions, 1706 flow [2024-06-14 11:33:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:05,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:05,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:33:05,055 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)] === [2024-06-14 11:33:05,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:05,055 INFO L85 PathProgramCache]: Analyzing trace with hash 137326199, now seen corresponding path program 1 times [2024-06-14 11:33:05,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:05,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134739223] [2024-06-14 11:33:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:05,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:05,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:05,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134739223] [2024-06-14 11:33:05,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134739223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:05,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:05,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:05,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188125535] [2024-06-14 11:33:05,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:05,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:05,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:05,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:05,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:05,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:05,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 147 transitions, 1706 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:05,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:05,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:05,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:05,497 INFO L124 PetriNetUnfolderBase]: 1506/2495 cut-off events. [2024-06-14 11:33:05,498 INFO L125 PetriNetUnfolderBase]: For 48984/48988 co-relation queries the response was YES. [2024-06-14 11:33:05,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14096 conditions, 2495 events. 1506/2495 cut-off events. For 48984/48988 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 13668 event pairs, 344 based on Foata normal form. 65/2549 useless extension candidates. Maximal degree in co-relation 14041. Up to 1430 conditions per place. [2024-06-14 11:33:05,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 74 changer transitions 0/185 dead transitions. [2024-06-14 11:33:05,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 185 transitions, 2318 flow [2024-06-14 11:33:05,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:05,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:05,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 11:33:05,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-14 11:33:05,516 INFO L175 Difference]: Start difference. First operand has 114 places, 147 transitions, 1706 flow. Second operand 7 states and 186 transitions. [2024-06-14 11:33:05,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 185 transitions, 2318 flow [2024-06-14 11:33:05,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 185 transitions, 2270 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:05,557 INFO L231 Difference]: Finished difference. Result has 116 places, 150 transitions, 1868 flow [2024-06-14 11:33:05,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1868, PETRI_PLACES=116, PETRI_TRANSITIONS=150} [2024-06-14 11:33:05,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 11:33:05,558 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 150 transitions, 1868 flow [2024-06-14 11:33:05,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:05,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:05,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:05,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:33:05,559 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:05,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -478011173, now seen corresponding path program 1 times [2024-06-14 11:33:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:05,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822617350] [2024-06-14 11:33:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:05,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:05,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:05,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822617350] [2024-06-14 11:33:05,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822617350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:05,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:05,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:05,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229039318] [2024-06-14 11:33:05,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:05,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:05,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:05,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:05,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:05,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 150 transitions, 1868 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:05,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:05,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:05,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:05,884 INFO L124 PetriNetUnfolderBase]: 1511/2511 cut-off events. [2024-06-14 11:33:05,884 INFO L125 PetriNetUnfolderBase]: For 41663/41663 co-relation queries the response was YES. [2024-06-14 11:33:05,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14968 conditions, 2511 events. 1511/2511 cut-off events. For 41663/41663 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 13781 event pairs, 348 based on Foata normal form. 1/2509 useless extension candidates. Maximal degree in co-relation 14912. Up to 2268 conditions per place. [2024-06-14 11:33:05,912 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 19 changer transitions 0/169 dead transitions. [2024-06-14 11:33:05,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 169 transitions, 2319 flow [2024-06-14 11:33:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:05,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 11:33:05,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 11:33:05,914 INFO L175 Difference]: Start difference. First operand has 116 places, 150 transitions, 1868 flow. Second operand 5 states and 121 transitions. [2024-06-14 11:33:05,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 169 transitions, 2319 flow [2024-06-14 11:33:05,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 169 transitions, 2139 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:05,971 INFO L231 Difference]: Finished difference. Result has 116 places, 153 transitions, 1777 flow [2024-06-14 11:33:05,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1777, PETRI_PLACES=116, PETRI_TRANSITIONS=153} [2024-06-14 11:33:05,972 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 11:33:05,972 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 153 transitions, 1777 flow [2024-06-14 11:33:05,972 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:05,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:05,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:05,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:33:05,973 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)] === [2024-06-14 11:33:05,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:05,973 INFO L85 PathProgramCache]: Analyzing trace with hash -1821392331, now seen corresponding path program 2 times [2024-06-14 11:33:05,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:05,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059340957] [2024-06-14 11:33:05,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:05,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:05,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:06,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:06,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059340957] [2024-06-14 11:33:06,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059340957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:06,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:06,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:06,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920928274] [2024-06-14 11:33:06,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:06,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:06,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:06,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:06,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:06,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:06,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 153 transitions, 1777 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:06,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:06,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:06,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:06,374 INFO L124 PetriNetUnfolderBase]: 1577/2599 cut-off events. [2024-06-14 11:33:06,374 INFO L125 PetriNetUnfolderBase]: For 45205/45211 co-relation queries the response was YES. [2024-06-14 11:33:06,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14689 conditions, 2599 events. 1577/2599 cut-off events. For 45205/45211 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14290 event pairs, 390 based on Foata normal form. 15/2607 useless extension candidates. Maximal degree in co-relation 14632. Up to 1860 conditions per place. [2024-06-14 11:33:06,393 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 102 selfloop transitions, 78 changer transitions 0/186 dead transitions. [2024-06-14 11:33:06,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 186 transitions, 2393 flow [2024-06-14 11:33:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:06,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:33:06,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-14 11:33:06,395 INFO L175 Difference]: Start difference. First operand has 116 places, 153 transitions, 1777 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:33:06,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 186 transitions, 2393 flow [2024-06-14 11:33:06,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 186 transitions, 2271 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:06,446 INFO L231 Difference]: Finished difference. Result has 119 places, 156 transitions, 1878 flow [2024-06-14 11:33:06,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1878, PETRI_PLACES=119, PETRI_TRANSITIONS=156} [2024-06-14 11:33:06,447 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-14 11:33:06,447 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 156 transitions, 1878 flow [2024-06-14 11:33:06,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:06,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:06,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:06,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:33:06,448 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)] === [2024-06-14 11:33:06,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash -2037780873, now seen corresponding path program 3 times [2024-06-14 11:33:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:06,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644612584] [2024-06-14 11:33:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:06,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:06,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644612584] [2024-06-14 11:33:06,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644612584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:06,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:06,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:06,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991106908] [2024-06-14 11:33:06,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:06,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:06,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:06,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:06,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:06,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:06,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 156 transitions, 1878 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:06,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:06,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:06,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:06,913 INFO L124 PetriNetUnfolderBase]: 1875/3105 cut-off events. [2024-06-14 11:33:06,913 INFO L125 PetriNetUnfolderBase]: For 61414/61420 co-relation queries the response was YES. [2024-06-14 11:33:06,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18147 conditions, 3105 events. 1875/3105 cut-off events. For 61414/61420 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17910 event pairs, 439 based on Foata normal form. 15/3113 useless extension candidates. Maximal degree in co-relation 18089. Up to 1402 conditions per place. [2024-06-14 11:33:06,936 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 111 selfloop transitions, 84 changer transitions 0/201 dead transitions. [2024-06-14 11:33:06,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 201 transitions, 2712 flow [2024-06-14 11:33:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:06,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:06,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 11:33:06,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515679442508711 [2024-06-14 11:33:06,937 INFO L175 Difference]: Start difference. First operand has 119 places, 156 transitions, 1878 flow. Second operand 7 states and 187 transitions. [2024-06-14 11:33:06,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 201 transitions, 2712 flow [2024-06-14 11:33:07,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 201 transitions, 2519 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:07,009 INFO L231 Difference]: Finished difference. Result has 122 places, 162 transitions, 2005 flow [2024-06-14 11:33:07,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1685, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2005, PETRI_PLACES=122, PETRI_TRANSITIONS=162} [2024-06-14 11:33:07,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-14 11:33:07,011 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 162 transitions, 2005 flow [2024-06-14 11:33:07,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:07,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:07,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:07,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:33:07,012 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:07,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:07,012 INFO L85 PathProgramCache]: Analyzing trace with hash -2049293481, now seen corresponding path program 4 times [2024-06-14 11:33:07,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:07,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653404943] [2024-06-14 11:33:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:07,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:07,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:07,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:07,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653404943] [2024-06-14 11:33:07,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653404943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:07,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:07,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:07,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148603928] [2024-06-14 11:33:07,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:07,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:07,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:07,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:07,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:07,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:07,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 162 transitions, 2005 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:07,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:07,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:07,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:07,520 INFO L124 PetriNetUnfolderBase]: 1903/3152 cut-off events. [2024-06-14 11:33:07,520 INFO L125 PetriNetUnfolderBase]: For 65700/65706 co-relation queries the response was YES. [2024-06-14 11:33:07,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18775 conditions, 3152 events. 1903/3152 cut-off events. For 65700/65706 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18223 event pairs, 512 based on Foata normal form. 15/3160 useless extension candidates. Maximal degree in co-relation 18715. Up to 2378 conditions per place. [2024-06-14 11:33:07,548 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 113 selfloop transitions, 75 changer transitions 0/194 dead transitions. [2024-06-14 11:33:07,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 194 transitions, 2628 flow [2024-06-14 11:33:07,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:07,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:07,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:33:07,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-14 11:33:07,550 INFO L175 Difference]: Start difference. First operand has 122 places, 162 transitions, 2005 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:33:07,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 194 transitions, 2628 flow [2024-06-14 11:33:07,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 194 transitions, 2422 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:07,654 INFO L231 Difference]: Finished difference. Result has 125 places, 164 transitions, 1993 flow [2024-06-14 11:33:07,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1993, PETRI_PLACES=125, PETRI_TRANSITIONS=164} [2024-06-14 11:33:07,654 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 11:33:07,654 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 164 transitions, 1993 flow [2024-06-14 11:33:07,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:07,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:07,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:07,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:33:07,655 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:07,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:07,656 INFO L85 PathProgramCache]: Analyzing trace with hash -440088563, now seen corresponding path program 2 times [2024-06-14 11:33:07,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:07,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433052005] [2024-06-14 11:33:07,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:07,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:07,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:07,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:07,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433052005] [2024-06-14 11:33:07,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433052005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:07,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:07,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:07,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309655242] [2024-06-14 11:33:07,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:07,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:07,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:07,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:07,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:07,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:07,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 164 transitions, 1993 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:07,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:07,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:07,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:08,065 INFO L124 PetriNetUnfolderBase]: 1895/3159 cut-off events. [2024-06-14 11:33:08,065 INFO L125 PetriNetUnfolderBase]: For 63607/63615 co-relation queries the response was YES. [2024-06-14 11:33:08,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18498 conditions, 3159 events. 1895/3159 cut-off events. For 63607/63615 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18354 event pairs, 527 based on Foata normal form. 8/3164 useless extension candidates. Maximal degree in co-relation 18437. Up to 2884 conditions per place. [2024-06-14 11:33:08,084 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 18 changer transitions 0/173 dead transitions. [2024-06-14 11:33:08,084 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 173 transitions, 2349 flow [2024-06-14 11:33:08,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-14 11:33:08,085 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 11:33:08,085 INFO L175 Difference]: Start difference. First operand has 125 places, 164 transitions, 1993 flow. Second operand 5 states and 113 transitions. [2024-06-14 11:33:08,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 173 transitions, 2349 flow [2024-06-14 11:33:08,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 173 transitions, 2148 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:08,155 INFO L231 Difference]: Finished difference. Result has 125 places, 164 transitions, 1836 flow [2024-06-14 11:33:08,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1792, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1836, PETRI_PLACES=125, PETRI_TRANSITIONS=164} [2024-06-14 11:33:08,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 11:33:08,156 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 164 transitions, 1836 flow [2024-06-14 11:33:08,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:08,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:08,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:08,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:33:08,157 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:08,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1008916389, now seen corresponding path program 1 times [2024-06-14 11:33:08,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:08,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088245799] [2024-06-14 11:33:08,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:08,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:08,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:08,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088245799] [2024-06-14 11:33:08,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088245799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:08,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:08,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:08,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625564468] [2024-06-14 11:33:08,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:08,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:08,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:08,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:08,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 164 transitions, 1836 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:08,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:08,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:08,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:08,505 INFO L124 PetriNetUnfolderBase]: 1897/3159 cut-off events. [2024-06-14 11:33:08,505 INFO L125 PetriNetUnfolderBase]: For 64052/64052 co-relation queries the response was YES. [2024-06-14 11:33:08,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17935 conditions, 3159 events. 1897/3159 cut-off events. For 64052/64052 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 18384 event pairs, 517 based on Foata normal form. 2/3159 useless extension candidates. Maximal degree in co-relation 17873. Up to 2885 conditions per place. [2024-06-14 11:33:08,529 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 156 selfloop transitions, 18 changer transitions 0/180 dead transitions. [2024-06-14 11:33:08,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 180 transitions, 2304 flow [2024-06-14 11:33:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:08,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 11:33:08,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-14 11:33:08,530 INFO L175 Difference]: Start difference. First operand has 125 places, 164 transitions, 1836 flow. Second operand 5 states and 117 transitions. [2024-06-14 11:33:08,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 180 transitions, 2304 flow [2024-06-14 11:33:08,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 180 transitions, 2252 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:08,598 INFO L231 Difference]: Finished difference. Result has 125 places, 167 transitions, 1868 flow [2024-06-14 11:33:08,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1784, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1868, PETRI_PLACES=125, PETRI_TRANSITIONS=167} [2024-06-14 11:33:08,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-14 11:33:08,598 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 167 transitions, 1868 flow [2024-06-14 11:33:08,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:08,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:08,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:08,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:33:08,599 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:08,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash -439073561, now seen corresponding path program 2 times [2024-06-14 11:33:08,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:08,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482977598] [2024-06-14 11:33:08,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:08,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:08,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:08,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:08,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482977598] [2024-06-14 11:33:08,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482977598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:08,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:08,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:33:08,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037432511] [2024-06-14 11:33:08,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:08,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:33:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:33:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:33:08,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:08,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 167 transitions, 1868 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:08,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:08,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:08,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:08,965 INFO L124 PetriNetUnfolderBase]: 1879/3128 cut-off events. [2024-06-14 11:33:08,966 INFO L125 PetriNetUnfolderBase]: For 67650/67652 co-relation queries the response was YES. [2024-06-14 11:33:08,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17919 conditions, 3128 events. 1879/3128 cut-off events. For 67650/67652 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 18191 event pairs, 523 based on Foata normal form. 1/3125 useless extension candidates. Maximal degree in co-relation 17856. Up to 2859 conditions per place. [2024-06-14 11:33:08,987 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 151 selfloop transitions, 19 changer transitions 0/176 dead transitions. [2024-06-14 11:33:08,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 176 transitions, 2230 flow [2024-06-14 11:33:08,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:33:08,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:33:08,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-14 11:33:08,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-14 11:33:08,988 INFO L175 Difference]: Start difference. First operand has 125 places, 167 transitions, 1868 flow. Second operand 5 states and 114 transitions. [2024-06-14 11:33:08,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 176 transitions, 2230 flow [2024-06-14 11:33:09,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 176 transitions, 2199 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:09,057 INFO L231 Difference]: Finished difference. Result has 128 places, 167 transitions, 1881 flow [2024-06-14 11:33:09,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1837, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1881, PETRI_PLACES=128, PETRI_TRANSITIONS=167} [2024-06-14 11:33:09,058 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 11:33:09,058 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 167 transitions, 1881 flow [2024-06-14 11:33:09,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:09,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:09,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:09,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:33:09,058 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)] === [2024-06-14 11:33:09,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1553517449, now seen corresponding path program 1 times [2024-06-14 11:33:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:09,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108619168] [2024-06-14 11:33:09,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:09,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:09,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:09,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:09,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108619168] [2024-06-14 11:33:09,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108619168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:09,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:09,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:09,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747359058] [2024-06-14 11:33:09,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:09,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:09,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:09,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:09,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:09,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:09,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 167 transitions, 1881 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:09,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:09,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:09,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:09,682 INFO L124 PetriNetUnfolderBase]: 2567/4254 cut-off events. [2024-06-14 11:33:09,682 INFO L125 PetriNetUnfolderBase]: For 127316/127318 co-relation queries the response was YES. [2024-06-14 11:33:09,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25159 conditions, 4254 events. 2567/4254 cut-off events. For 127316/127318 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26408 event pairs, 460 based on Foata normal form. 48/4271 useless extension candidates. Maximal degree in co-relation 25095. Up to 1585 conditions per place. [2024-06-14 11:33:09,712 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 145 selfloop transitions, 76 changer transitions 0/227 dead transitions. [2024-06-14 11:33:09,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 227 transitions, 2927 flow [2024-06-14 11:33:09,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:09,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:09,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-14 11:33:09,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-14 11:33:09,729 INFO L175 Difference]: Start difference. First operand has 128 places, 167 transitions, 1881 flow. Second operand 7 states and 196 transitions. [2024-06-14 11:33:09,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 227 transitions, 2927 flow [2024-06-14 11:33:09,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 227 transitions, 2858 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:09,857 INFO L231 Difference]: Finished difference. Result has 131 places, 175 transitions, 2167 flow [2024-06-14 11:33:09,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1812, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2167, PETRI_PLACES=131, PETRI_TRANSITIONS=175} [2024-06-14 11:33:09,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 11:33:09,862 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 175 transitions, 2167 flow [2024-06-14 11:33:09,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:09,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:09,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:09,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:33:09,866 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)] === [2024-06-14 11:33:09,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:09,866 INFO L85 PathProgramCache]: Analyzing trace with hash -182107507, now seen corresponding path program 2 times [2024-06-14 11:33:09,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:09,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100290281] [2024-06-14 11:33:09,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:09,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:10,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:10,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:10,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100290281] [2024-06-14 11:33:10,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100290281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:10,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:10,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:10,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280999205] [2024-06-14 11:33:10,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:10,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:10,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:10,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:10,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:10,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:10,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 175 transitions, 2167 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:10,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:10,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:10,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:10,628 INFO L124 PetriNetUnfolderBase]: 2883/4818 cut-off events. [2024-06-14 11:33:10,628 INFO L125 PetriNetUnfolderBase]: For 153184/153186 co-relation queries the response was YES. [2024-06-14 11:33:10,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29700 conditions, 4818 events. 2883/4818 cut-off events. For 153184/153186 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 30969 event pairs, 792 based on Foata normal form. 48/4841 useless extension candidates. Maximal degree in co-relation 29634. Up to 3151 conditions per place. [2024-06-14 11:33:10,670 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 137 selfloop transitions, 80 changer transitions 0/223 dead transitions. [2024-06-14 11:33:10,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 223 transitions, 3071 flow [2024-06-14 11:33:10,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:10,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:10,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 11:33:10,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6655052264808362 [2024-06-14 11:33:10,672 INFO L175 Difference]: Start difference. First operand has 131 places, 175 transitions, 2167 flow. Second operand 7 states and 191 transitions. [2024-06-14 11:33:10,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 223 transitions, 3071 flow [2024-06-14 11:33:10,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 223 transitions, 2920 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:10,881 INFO L231 Difference]: Finished difference. Result has 137 places, 181 transitions, 2335 flow [2024-06-14 11:33:10,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2335, PETRI_PLACES=137, PETRI_TRANSITIONS=181} [2024-06-14 11:33:10,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 95 predicate places. [2024-06-14 11:33:10,882 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 181 transitions, 2335 flow [2024-06-14 11:33:10,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:10,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:10,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:10,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:33:10,883 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:10,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:10,883 INFO L85 PathProgramCache]: Analyzing trace with hash -1035087157, now seen corresponding path program 1 times [2024-06-14 11:33:10,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:10,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290760754] [2024-06-14 11:33:10,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:10,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:10,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:10,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:10,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290760754] [2024-06-14 11:33:10,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290760754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:10,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:10,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:10,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195634576] [2024-06-14 11:33:10,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:10,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:10,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:10,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:10,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:10,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:10,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 181 transitions, 2335 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:10,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:10,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:10,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:11,538 INFO L124 PetriNetUnfolderBase]: 2898/4860 cut-off events. [2024-06-14 11:33:11,538 INFO L125 PetriNetUnfolderBase]: For 144744/144746 co-relation queries the response was YES. [2024-06-14 11:33:11,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30610 conditions, 4860 events. 2898/4860 cut-off events. For 144744/144746 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 31547 event pairs, 935 based on Foata normal form. 3/4852 useless extension candidates. Maximal degree in co-relation 30541. Up to 4062 conditions per place. [2024-06-14 11:33:11,579 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 121 selfloop transitions, 84 changer transitions 0/211 dead transitions. [2024-06-14 11:33:11,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 211 transitions, 3063 flow [2024-06-14 11:33:11,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:11,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 11:33:11,582 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6422764227642277 [2024-06-14 11:33:11,582 INFO L175 Difference]: Start difference. First operand has 137 places, 181 transitions, 2335 flow. Second operand 6 states and 158 transitions. [2024-06-14 11:33:11,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 211 transitions, 3063 flow [2024-06-14 11:33:11,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 211 transitions, 2886 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:11,898 INFO L231 Difference]: Finished difference. Result has 140 places, 186 transitions, 2421 flow [2024-06-14 11:33:11,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2164, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2421, PETRI_PLACES=140, PETRI_TRANSITIONS=186} [2024-06-14 11:33:11,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 11:33:11,907 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 186 transitions, 2421 flow [2024-06-14 11:33:11,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:11,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:11,908 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:11,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:33:11,908 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)] === [2024-06-14 11:33:11,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:11,909 INFO L85 PathProgramCache]: Analyzing trace with hash -43579357, now seen corresponding path program 3 times [2024-06-14 11:33:11,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:11,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967521093] [2024-06-14 11:33:11,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:11,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:12,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:12,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967521093] [2024-06-14 11:33:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967521093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:12,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:12,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706427107] [2024-06-14 11:33:12,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:12,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:12,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:12,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:12,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:12,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 186 transitions, 2421 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:12,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:12,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:12,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:12,698 INFO L124 PetriNetUnfolderBase]: 3330/5654 cut-off events. [2024-06-14 11:33:12,698 INFO L125 PetriNetUnfolderBase]: For 192870/192872 co-relation queries the response was YES. [2024-06-14 11:33:12,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35244 conditions, 5654 events. 3330/5654 cut-off events. For 192870/192872 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38392 event pairs, 932 based on Foata normal form. 42/5685 useless extension candidates. Maximal degree in co-relation 35173. Up to 3813 conditions per place. [2024-06-14 11:33:12,746 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 146 selfloop transitions, 86 changer transitions 0/238 dead transitions. [2024-06-14 11:33:12,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 238 transitions, 3451 flow [2024-06-14 11:33:12,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:12,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:12,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-14 11:33:12,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6759581881533101 [2024-06-14 11:33:12,747 INFO L175 Difference]: Start difference. First operand has 140 places, 186 transitions, 2421 flow. Second operand 7 states and 194 transitions. [2024-06-14 11:33:12,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 238 transitions, 3451 flow [2024-06-14 11:33:13,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 238 transitions, 3310 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:13,060 INFO L231 Difference]: Finished difference. Result has 145 places, 191 transitions, 2603 flow [2024-06-14 11:33:13,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2280, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2603, PETRI_PLACES=145, PETRI_TRANSITIONS=191} [2024-06-14 11:33:13,061 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 103 predicate places. [2024-06-14 11:33:13,061 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 191 transitions, 2603 flow [2024-06-14 11:33:13,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:13,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:13,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:33:13,062 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)] === [2024-06-14 11:33:13,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:13,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2024173951, now seen corresponding path program 4 times [2024-06-14 11:33:13,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:13,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446290325] [2024-06-14 11:33:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:13,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:13,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:13,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:13,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446290325] [2024-06-14 11:33:13,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446290325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:13,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:13,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:13,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182934158] [2024-06-14 11:33:13,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:13,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:13,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:13,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:13,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:13,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:13,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 191 transitions, 2603 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:13,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:13,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:13,829 INFO L124 PetriNetUnfolderBase]: 3527/5995 cut-off events. [2024-06-14 11:33:13,829 INFO L125 PetriNetUnfolderBase]: For 213541/213543 co-relation queries the response was YES. [2024-06-14 11:33:13,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37568 conditions, 5995 events. 3527/5995 cut-off events. For 213541/213543 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 41335 event pairs, 1243 based on Foata normal form. 50/6034 useless extension candidates. Maximal degree in co-relation 37495. Up to 4797 conditions per place. [2024-06-14 11:33:13,876 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 140 selfloop transitions, 85 changer transitions 0/231 dead transitions. [2024-06-14 11:33:13,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 231 transitions, 3405 flow [2024-06-14 11:33:13,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:13,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 11:33:13,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515679442508711 [2024-06-14 11:33:13,877 INFO L175 Difference]: Start difference. First operand has 145 places, 191 transitions, 2603 flow. Second operand 7 states and 187 transitions. [2024-06-14 11:33:13,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 231 transitions, 3405 flow [2024-06-14 11:33:14,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 231 transitions, 3230 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:14,213 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 2675 flow [2024-06-14 11:33:14,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2430, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2675, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-14 11:33:14,214 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 11:33:14,214 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 2675 flow [2024-06-14 11:33:14,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:14,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:14,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:14,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:33:14,215 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:14,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:14,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1809075283, now seen corresponding path program 5 times [2024-06-14 11:33:14,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:14,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907374154] [2024-06-14 11:33:14,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:14,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:14,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:14,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907374154] [2024-06-14 11:33:14,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907374154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:14,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:14,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:14,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668496846] [2024-06-14 11:33:14,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:14,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:14,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:14,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:14,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:14,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 2675 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:14,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:14,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:14,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:15,036 INFO L124 PetriNetUnfolderBase]: 3724/6352 cut-off events. [2024-06-14 11:33:15,036 INFO L125 PetriNetUnfolderBase]: For 229152/229154 co-relation queries the response was YES. [2024-06-14 11:33:15,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39380 conditions, 6352 events. 3724/6352 cut-off events. For 229152/229154 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 44538 event pairs, 1290 based on Foata normal form. 50/6391 useless extension candidates. Maximal degree in co-relation 39305. Up to 5136 conditions per place. [2024-06-14 11:33:15,094 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 142 selfloop transitions, 81 changer transitions 0/229 dead transitions. [2024-06-14 11:33:15,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 229 transitions, 3407 flow [2024-06-14 11:33:15,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:33:15,095 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 11:33:15,095 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 2675 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:33:15,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 229 transitions, 3407 flow [2024-06-14 11:33:15,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 229 transitions, 3196 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:15,369 INFO L231 Difference]: Finished difference. Result has 151 places, 195 transitions, 2705 flow [2024-06-14 11:33:15,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2464, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2705, PETRI_PLACES=151, PETRI_TRANSITIONS=195} [2024-06-14 11:33:15,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-14 11:33:15,370 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 195 transitions, 2705 flow [2024-06-14 11:33:15,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:15,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:15,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:15,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:33:15,370 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:15,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:15,371 INFO L85 PathProgramCache]: Analyzing trace with hash -37853905, now seen corresponding path program 1 times [2024-06-14 11:33:15,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:15,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750237686] [2024-06-14 11:33:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:15,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:15,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:15,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750237686] [2024-06-14 11:33:15,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750237686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:15,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:15,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:15,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264964014] [2024-06-14 11:33:15,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:15,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:15,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:15,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:15,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:15,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:15,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 195 transitions, 2705 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:15,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:15,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:15,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:16,305 INFO L124 PetriNetUnfolderBase]: 3882/6652 cut-off events. [2024-06-14 11:33:16,306 INFO L125 PetriNetUnfolderBase]: For 241536/241538 co-relation queries the response was YES. [2024-06-14 11:33:16,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40618 conditions, 6652 events. 3882/6652 cut-off events. For 241536/241538 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 47486 event pairs, 1220 based on Foata normal form. 42/6668 useless extension candidates. Maximal degree in co-relation 40542. Up to 4298 conditions per place. [2024-06-14 11:33:16,380 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 142 selfloop transitions, 89 changer transitions 0/237 dead transitions. [2024-06-14 11:33:16,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 237 transitions, 3480 flow [2024-06-14 11:33:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:16,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:16,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-14 11:33:16,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6480836236933798 [2024-06-14 11:33:16,382 INFO L175 Difference]: Start difference. First operand has 151 places, 195 transitions, 2705 flow. Second operand 7 states and 186 transitions. [2024-06-14 11:33:16,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 237 transitions, 3480 flow [2024-06-14 11:33:16,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 237 transitions, 3273 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:16,716 INFO L231 Difference]: Finished difference. Result has 153 places, 197 transitions, 2755 flow [2024-06-14 11:33:16,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2755, PETRI_PLACES=153, PETRI_TRANSITIONS=197} [2024-06-14 11:33:16,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 111 predicate places. [2024-06-14 11:33:16,719 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 197 transitions, 2755 flow [2024-06-14 11:33:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:16,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:16,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:16,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:33:16,722 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)] === [2024-06-14 11:33:16,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:16,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1933443133, now seen corresponding path program 2 times [2024-06-14 11:33:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:16,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421826673] [2024-06-14 11:33:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:16,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:16,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:16,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:16,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421826673] [2024-06-14 11:33:16,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421826673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:16,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:16,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:16,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534976002] [2024-06-14 11:33:16,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:16,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:16,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:16,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:16,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:16,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:16,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 197 transitions, 2755 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:16,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:16,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:16,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:17,563 INFO L124 PetriNetUnfolderBase]: 3933/6716 cut-off events. [2024-06-14 11:33:17,563 INFO L125 PetriNetUnfolderBase]: For 229759/229761 co-relation queries the response was YES. [2024-06-14 11:33:17,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41572 conditions, 6716 events. 3933/6716 cut-off events. For 229759/229761 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 47577 event pairs, 1405 based on Foata normal form. 3/6708 useless extension candidates. Maximal degree in co-relation 41495. Up to 5755 conditions per place. [2024-06-14 11:33:17,712 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 132 selfloop transitions, 91 changer transitions 0/229 dead transitions. [2024-06-14 11:33:17,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 229 transitions, 3680 flow [2024-06-14 11:33:17,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 11:33:17,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 11:33:17,714 INFO L175 Difference]: Start difference. First operand has 153 places, 197 transitions, 2755 flow. Second operand 6 states and 151 transitions. [2024-06-14 11:33:17,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 229 transitions, 3680 flow [2024-06-14 11:33:17,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 229 transitions, 3432 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:17,992 INFO L231 Difference]: Finished difference. Result has 155 places, 210 transitions, 2966 flow [2024-06-14 11:33:17,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2527, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2966, PETRI_PLACES=155, PETRI_TRANSITIONS=210} [2024-06-14 11:33:17,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 11:33:17,993 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 210 transitions, 2966 flow [2024-06-14 11:33:17,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:17,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:17,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:17,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:33:17,993 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:17,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:17,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1507134193, now seen corresponding path program 6 times [2024-06-14 11:33:17,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32242170] [2024-06-14 11:33:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:18,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:18,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32242170] [2024-06-14 11:33:18,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32242170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:18,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:18,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:18,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312830359] [2024-06-14 11:33:18,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:18,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:18,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:18,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:18,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:18,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 210 transitions, 2966 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:18,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:18,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:18,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:18,873 INFO L124 PetriNetUnfolderBase]: 4034/6917 cut-off events. [2024-06-14 11:33:18,873 INFO L125 PetriNetUnfolderBase]: For 260727/260735 co-relation queries the response was YES. [2024-06-14 11:33:18,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41529 conditions, 6917 events. 4034/6917 cut-off events. For 260727/260735 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 49614 event pairs, 1479 based on Foata normal form. 53/6966 useless extension candidates. Maximal degree in co-relation 41450. Up to 5622 conditions per place. [2024-06-14 11:33:18,939 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 78 changer transitions 0/243 dead transitions. [2024-06-14 11:33:18,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 243 transitions, 3736 flow [2024-06-14 11:33:18,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:18,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:33:18,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-14 11:33:18,940 INFO L175 Difference]: Start difference. First operand has 155 places, 210 transitions, 2966 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:33:18,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 243 transitions, 3736 flow [2024-06-14 11:33:19,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 243 transitions, 3619 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:19,264 INFO L231 Difference]: Finished difference. Result has 160 places, 212 transitions, 3090 flow [2024-06-14 11:33:19,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3090, PETRI_PLACES=160, PETRI_TRANSITIONS=212} [2024-06-14 11:33:19,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-14 11:33:19,264 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 212 transitions, 3090 flow [2024-06-14 11:33:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:19,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:33:19,265 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:19,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1763849905, now seen corresponding path program 2 times [2024-06-14 11:33:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:19,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119460195] [2024-06-14 11:33:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:19,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:19,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:19,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119460195] [2024-06-14 11:33:19,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119460195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:19,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:19,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854503387] [2024-06-14 11:33:19,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:19,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:19,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:19,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:19,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:19,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:19,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 212 transitions, 3090 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:19,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:19,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:19,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:20,154 INFO L124 PetriNetUnfolderBase]: 4124/7107 cut-off events. [2024-06-14 11:33:20,155 INFO L125 PetriNetUnfolderBase]: For 265815/265823 co-relation queries the response was YES. [2024-06-14 11:33:20,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42050 conditions, 7107 events. 4124/7107 cut-off events. For 265815/265823 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 51475 event pairs, 1450 based on Foata normal form. 45/7148 useless extension candidates. Maximal degree in co-relation 41970. Up to 5437 conditions per place. [2024-06-14 11:33:20,221 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 82 changer transitions 0/251 dead transitions. [2024-06-14 11:33:20,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 251 transitions, 3903 flow [2024-06-14 11:33:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:20,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:33:20,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 11:33:20,222 INFO L175 Difference]: Start difference. First operand has 160 places, 212 transitions, 3090 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:33:20,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 251 transitions, 3903 flow [2024-06-14 11:33:20,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 251 transitions, 3696 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:20,514 INFO L231 Difference]: Finished difference. Result has 162 places, 214 transitions, 3131 flow [2024-06-14 11:33:20,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2883, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3131, PETRI_PLACES=162, PETRI_TRANSITIONS=214} [2024-06-14 11:33:20,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-14 11:33:20,515 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 214 transitions, 3131 flow [2024-06-14 11:33:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:20,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:20,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:33:20,516 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:20,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:20,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1061270239, now seen corresponding path program 3 times [2024-06-14 11:33:20,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:20,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820198490] [2024-06-14 11:33:20,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:20,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:20,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:20,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:20,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820198490] [2024-06-14 11:33:20,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820198490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:20,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:20,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:20,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65467633] [2024-06-14 11:33:20,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:20,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:20,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:20,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:20,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:20,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:20,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 214 transitions, 3131 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:20,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:20,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:20,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:21,538 INFO L124 PetriNetUnfolderBase]: 4341/7503 cut-off events. [2024-06-14 11:33:21,538 INFO L125 PetriNetUnfolderBase]: For 288724/288732 co-relation queries the response was YES. [2024-06-14 11:33:21,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43568 conditions, 7503 events. 4341/7503 cut-off events. For 288724/288732 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 54728 event pairs, 1464 based on Foata normal form. 45/7544 useless extension candidates. Maximal degree in co-relation 43487. Up to 3258 conditions per place. [2024-06-14 11:33:21,598 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 87 changer transitions 0/256 dead transitions. [2024-06-14 11:33:21,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 256 transitions, 3933 flow [2024-06-14 11:33:21,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:21,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:21,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 11:33:21,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6411149825783972 [2024-06-14 11:33:21,599 INFO L175 Difference]: Start difference. First operand has 162 places, 214 transitions, 3131 flow. Second operand 7 states and 184 transitions. [2024-06-14 11:33:21,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 256 transitions, 3933 flow [2024-06-14 11:33:21,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 256 transitions, 3712 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:21,972 INFO L231 Difference]: Finished difference. Result has 163 places, 214 transitions, 3049 flow [2024-06-14 11:33:21,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2850, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3049, PETRI_PLACES=163, PETRI_TRANSITIONS=214} [2024-06-14 11:33:21,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 11:33:21,973 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 214 transitions, 3049 flow [2024-06-14 11:33:21,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:21,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:21,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:21,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:33:21,973 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)] === [2024-06-14 11:33:21,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:21,974 INFO L85 PathProgramCache]: Analyzing trace with hash 148855853, now seen corresponding path program 3 times [2024-06-14 11:33:21,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:21,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963208210] [2024-06-14 11:33:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:21,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:22,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:22,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963208210] [2024-06-14 11:33:22,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963208210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:22,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:22,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:22,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858636990] [2024-06-14 11:33:22,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:22,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:22,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:22,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:22,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 214 transitions, 3049 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:22,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:22,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:22,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:22,921 INFO L124 PetriNetUnfolderBase]: 4331/7486 cut-off events. [2024-06-14 11:33:22,921 INFO L125 PetriNetUnfolderBase]: For 267080/267088 co-relation queries the response was YES. [2024-06-14 11:33:22,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43409 conditions, 7486 events. 4331/7486 cut-off events. For 267080/267088 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55100 event pairs, 1709 based on Foata normal form. 7/7480 useless extension candidates. Maximal degree in co-relation 43327. Up to 6460 conditions per place. [2024-06-14 11:33:22,995 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 86 changer transitions 0/227 dead transitions. [2024-06-14 11:33:22,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 227 transitions, 3749 flow [2024-06-14 11:33:22,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:22,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-14 11:33:22,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-14 11:33:22,996 INFO L175 Difference]: Start difference. First operand has 163 places, 214 transitions, 3049 flow. Second operand 6 states and 146 transitions. [2024-06-14 11:33:22,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 227 transitions, 3749 flow [2024-06-14 11:33:23,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 227 transitions, 3512 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:23,495 INFO L231 Difference]: Finished difference. Result has 164 places, 214 transitions, 2995 flow [2024-06-14 11:33:23,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2812, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2995, PETRI_PLACES=164, PETRI_TRANSITIONS=214} [2024-06-14 11:33:23,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-14 11:33:23,497 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 214 transitions, 2995 flow [2024-06-14 11:33:23,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:23,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:23,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:23,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:33:23,498 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)] === [2024-06-14 11:33:23,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:23,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1921944601, now seen corresponding path program 1 times [2024-06-14 11:33:23,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:23,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671212717] [2024-06-14 11:33:23,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:23,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:23,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:23,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671212717] [2024-06-14 11:33:23,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671212717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:23,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:23,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:23,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954721455] [2024-06-14 11:33:23,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:23,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:23,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:23,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:23,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:23,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:23,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 214 transitions, 2995 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:23,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:23,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:23,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:24,568 INFO L124 PetriNetUnfolderBase]: 4250/7311 cut-off events. [2024-06-14 11:33:24,569 INFO L125 PetriNetUnfolderBase]: For 260070/260073 co-relation queries the response was YES. [2024-06-14 11:33:24,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42373 conditions, 7311 events. 4250/7311 cut-off events. For 260070/260073 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53238 event pairs, 1678 based on Foata normal form. 6/7310 useless extension candidates. Maximal degree in co-relation 42290. Up to 6270 conditions per place. [2024-06-14 11:33:24,647 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 142 selfloop transitions, 95 changer transitions 0/243 dead transitions. [2024-06-14 11:33:24,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 243 transitions, 3976 flow [2024-06-14 11:33:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:24,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:24,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:33:24,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 11:33:24,649 INFO L175 Difference]: Start difference. First operand has 164 places, 214 transitions, 2995 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:33:24,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 243 transitions, 3976 flow [2024-06-14 11:33:25,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 243 transitions, 3488 flow, removed 28 selfloop flow, removed 9 redundant places. [2024-06-14 11:33:25,071 INFO L231 Difference]: Finished difference. Result has 162 places, 227 transitions, 2981 flow [2024-06-14 11:33:25,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2557, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2981, PETRI_PLACES=162, PETRI_TRANSITIONS=227} [2024-06-14 11:33:25,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 120 predicate places. [2024-06-14 11:33:25,072 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 227 transitions, 2981 flow [2024-06-14 11:33:25,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:25,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:25,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:25,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:33:25,073 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:25,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:25,073 INFO L85 PathProgramCache]: Analyzing trace with hash -757657339, now seen corresponding path program 2 times [2024-06-14 11:33:25,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:25,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041215064] [2024-06-14 11:33:25,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:25,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:25,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:25,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041215064] [2024-06-14 11:33:25,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041215064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:25,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:25,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:25,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577870532] [2024-06-14 11:33:25,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:25,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:25,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:25,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:25,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:25,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:25,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 227 transitions, 2981 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:25,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:25,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:25,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:26,078 INFO L124 PetriNetUnfolderBase]: 4269/7359 cut-off events. [2024-06-14 11:33:26,078 INFO L125 PetriNetUnfolderBase]: For 263519/263524 co-relation queries the response was YES. [2024-06-14 11:33:26,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42525 conditions, 7359 events. 4269/7359 cut-off events. For 263519/263524 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53629 event pairs, 1707 based on Foata normal form. 3/7350 useless extension candidates. Maximal degree in co-relation 42443. Up to 6281 conditions per place. [2024-06-14 11:33:26,133 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 101 changer transitions 0/245 dead transitions. [2024-06-14 11:33:26,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 245 transitions, 3812 flow [2024-06-14 11:33:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:26,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:26,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:33:26,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:33:26,134 INFO L175 Difference]: Start difference. First operand has 162 places, 227 transitions, 2981 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:33:26,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 245 transitions, 3812 flow [2024-06-14 11:33:26,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 245 transitions, 3683 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:26,430 INFO L231 Difference]: Finished difference. Result has 166 places, 232 transitions, 3150 flow [2024-06-14 11:33:26,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2855, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3150, PETRI_PLACES=166, PETRI_TRANSITIONS=232} [2024-06-14 11:33:26,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 11:33:26,430 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 232 transitions, 3150 flow [2024-06-14 11:33:26,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:26,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:26,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:26,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:33:26,431 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:26,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:26,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1519793285, now seen corresponding path program 3 times [2024-06-14 11:33:26,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:26,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314358813] [2024-06-14 11:33:26,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:26,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:26,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:26,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:26,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:26,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314358813] [2024-06-14 11:33:26,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314358813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:26,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:26,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:26,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323017130] [2024-06-14 11:33:26,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:26,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:26,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:26,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:26,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:26,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:26,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 232 transitions, 3150 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:26,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:26,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:26,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:27,367 INFO L124 PetriNetUnfolderBase]: 4262/7349 cut-off events. [2024-06-14 11:33:27,368 INFO L125 PetriNetUnfolderBase]: For 273912/273917 co-relation queries the response was YES. [2024-06-14 11:33:27,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42664 conditions, 7349 events. 4262/7349 cut-off events. For 273912/273917 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53571 event pairs, 1713 based on Foata normal form. 3/7339 useless extension candidates. Maximal degree in co-relation 42581. Up to 6279 conditions per place. [2024-06-14 11:33:27,444 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 135 selfloop transitions, 104 changer transitions 0/245 dead transitions. [2024-06-14 11:33:27,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 245 transitions, 3904 flow [2024-06-14 11:33:27,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:27,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:27,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:33:27,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 11:33:27,446 INFO L175 Difference]: Start difference. First operand has 166 places, 232 transitions, 3150 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:33:27,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 245 transitions, 3904 flow [2024-06-14 11:33:27,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 245 transitions, 3612 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:27,809 INFO L231 Difference]: Finished difference. Result has 166 places, 232 transitions, 3075 flow [2024-06-14 11:33:27,810 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2858, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3075, PETRI_PLACES=166, PETRI_TRANSITIONS=232} [2024-06-14 11:33:27,810 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 11:33:27,810 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 232 transitions, 3075 flow [2024-06-14 11:33:27,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:27,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:27,811 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:27,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:33:27,811 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:27,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:27,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1921047721, now seen corresponding path program 1 times [2024-06-14 11:33:27,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:27,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332880607] [2024-06-14 11:33:27,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:27,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:27,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:27,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332880607] [2024-06-14 11:33:27,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332880607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:27,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:27,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:27,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755306081] [2024-06-14 11:33:27,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:27,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:27,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:27,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:27,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 232 transitions, 3075 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:27,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:27,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:27,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:28,837 INFO L124 PetriNetUnfolderBase]: 4265/7360 cut-off events. [2024-06-14 11:33:28,838 INFO L125 PetriNetUnfolderBase]: For 284714/284719 co-relation queries the response was YES. [2024-06-14 11:33:28,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42737 conditions, 7360 events. 4265/7360 cut-off events. For 284714/284719 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53691 event pairs, 1665 based on Foata normal form. 8/7365 useless extension candidates. Maximal degree in co-relation 42655. Up to 6822 conditions per place. [2024-06-14 11:33:28,894 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 218 selfloop transitions, 22 changer transitions 0/246 dead transitions. [2024-06-14 11:33:28,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 246 transitions, 3629 flow [2024-06-14 11:33:28,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:28,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:28,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-14 11:33:28,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-14 11:33:28,895 INFO L175 Difference]: Start difference. First operand has 166 places, 232 transitions, 3075 flow. Second operand 6 states and 130 transitions. [2024-06-14 11:33:28,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 246 transitions, 3629 flow [2024-06-14 11:33:29,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 246 transitions, 3350 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 11:33:29,231 INFO L231 Difference]: Finished difference. Result has 166 places, 235 transitions, 2900 flow [2024-06-14 11:33:29,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2900, PETRI_PLACES=166, PETRI_TRANSITIONS=235} [2024-06-14 11:33:29,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 124 predicate places. [2024-06-14 11:33:29,232 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 235 transitions, 2900 flow [2024-06-14 11:33:29,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:29,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:29,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:33:29,233 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:29,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash 894977349, now seen corresponding path program 1 times [2024-06-14 11:33:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:29,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272067647] [2024-06-14 11:33:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:29,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:29,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272067647] [2024-06-14 11:33:29,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272067647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:29,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:29,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:29,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132887582] [2024-06-14 11:33:29,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:29,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:29,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:29,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:29,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:29,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:29,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 235 transitions, 2900 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:29,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:29,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:29,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:30,125 INFO L124 PetriNetUnfolderBase]: 4280/7396 cut-off events. [2024-06-14 11:33:30,126 INFO L125 PetriNetUnfolderBase]: For 294161/294168 co-relation queries the response was YES. [2024-06-14 11:33:30,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42805 conditions, 7396 events. 4280/7396 cut-off events. For 294161/294168 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 54109 event pairs, 1625 based on Foata normal form. 7/7399 useless extension candidates. Maximal degree in co-relation 42724. Up to 6298 conditions per place. [2024-06-14 11:33:30,193 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 162 selfloop transitions, 90 changer transitions 0/258 dead transitions. [2024-06-14 11:33:30,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 258 transitions, 3695 flow [2024-06-14 11:33:30,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:33:30,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:33:30,195 INFO L175 Difference]: Start difference. First operand has 166 places, 235 transitions, 2900 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:33:30,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 258 transitions, 3695 flow [2024-06-14 11:33:30,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 258 transitions, 3613 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:30,581 INFO L231 Difference]: Finished difference. Result has 168 places, 240 transitions, 3083 flow [2024-06-14 11:33:30,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2818, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3083, PETRI_PLACES=168, PETRI_TRANSITIONS=240} [2024-06-14 11:33:30,581 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-14 11:33:30,581 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 240 transitions, 3083 flow [2024-06-14 11:33:30,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:30,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:30,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:30,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:33:30,582 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:30,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:30,583 INFO L85 PathProgramCache]: Analyzing trace with hash 742217934, now seen corresponding path program 1 times [2024-06-14 11:33:30,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:30,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260444828] [2024-06-14 11:33:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:30,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:30,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:30,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260444828] [2024-06-14 11:33:30,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260444828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:30,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:30,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:30,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644914241] [2024-06-14 11:33:30,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:30,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:30,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:30,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:30,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:30,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:30,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 240 transitions, 3083 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:30,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:30,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:30,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:31,526 INFO L124 PetriNetUnfolderBase]: 4264/7344 cut-off events. [2024-06-14 11:33:31,527 INFO L125 PetriNetUnfolderBase]: For 304816/304818 co-relation queries the response was YES. [2024-06-14 11:33:31,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43086 conditions, 7344 events. 4264/7344 cut-off events. For 304816/304818 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53458 event pairs, 1590 based on Foata normal form. 4/7333 useless extension candidates. Maximal degree in co-relation 43004. Up to 6289 conditions per place. [2024-06-14 11:33:31,582 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 155 selfloop transitions, 101 changer transitions 0/262 dead transitions. [2024-06-14 11:33:31,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 262 transitions, 3913 flow [2024-06-14 11:33:31,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:31,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:31,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 11:33:31,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-14 11:33:31,584 INFO L175 Difference]: Start difference. First operand has 168 places, 240 transitions, 3083 flow. Second operand 6 states and 154 transitions. [2024-06-14 11:33:31,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 262 transitions, 3913 flow [2024-06-14 11:33:31,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 262 transitions, 3715 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:31,993 INFO L231 Difference]: Finished difference. Result has 170 places, 240 transitions, 3096 flow [2024-06-14 11:33:31,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3096, PETRI_PLACES=170, PETRI_TRANSITIONS=240} [2024-06-14 11:33:31,993 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-14 11:33:31,994 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 240 transitions, 3096 flow [2024-06-14 11:33:31,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:31,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:31,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:31,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:33:31,994 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:31,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:31,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1753057324, now seen corresponding path program 2 times [2024-06-14 11:33:31,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:31,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373689839] [2024-06-14 11:33:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:31,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:31,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:32,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:32,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373689839] [2024-06-14 11:33:32,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373689839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:32,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:32,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:32,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177358706] [2024-06-14 11:33:32,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:32,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:32,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:32,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:32,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:32,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:32,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 240 transitions, 3096 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:32,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:32,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:32,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:32,872 INFO L124 PetriNetUnfolderBase]: 4258/7336 cut-off events. [2024-06-14 11:33:32,872 INFO L125 PetriNetUnfolderBase]: For 313271/313273 co-relation queries the response was YES. [2024-06-14 11:33:32,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43293 conditions, 7336 events. 4258/7336 cut-off events. For 313271/313273 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53347 event pairs, 1590 based on Foata normal form. 2/7323 useless extension candidates. Maximal degree in co-relation 43211. Up to 6288 conditions per place. [2024-06-14 11:33:32,939 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 148 selfloop transitions, 105 changer transitions 0/259 dead transitions. [2024-06-14 11:33:32,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 259 transitions, 3918 flow [2024-06-14 11:33:32,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:33:32,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 11:33:32,941 INFO L175 Difference]: Start difference. First operand has 170 places, 240 transitions, 3096 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:33:32,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 259 transitions, 3918 flow [2024-06-14 11:33:33,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 259 transitions, 3743 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:33,483 INFO L231 Difference]: Finished difference. Result has 173 places, 240 transitions, 3140 flow [2024-06-14 11:33:33,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2921, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3140, PETRI_PLACES=173, PETRI_TRANSITIONS=240} [2024-06-14 11:33:33,484 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-14 11:33:33,484 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 240 transitions, 3140 flow [2024-06-14 11:33:33,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:33,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:33,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:33,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:33:33,484 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:33,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:33,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1963857541, now seen corresponding path program 2 times [2024-06-14 11:33:33,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:33,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492563322] [2024-06-14 11:33:33,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:33,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:33,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:33,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492563322] [2024-06-14 11:33:33,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492563322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:33,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:33,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:33,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888830242] [2024-06-14 11:33:33,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:33,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:33,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:33,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:33,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 240 transitions, 3140 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:33,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:33,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:33,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:34,456 INFO L124 PetriNetUnfolderBase]: 4277/7375 cut-off events. [2024-06-14 11:33:34,457 INFO L125 PetriNetUnfolderBase]: For 328325/328330 co-relation queries the response was YES. [2024-06-14 11:33:34,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43883 conditions, 7375 events. 4277/7375 cut-off events. For 328325/328330 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53788 event pairs, 1638 based on Foata normal form. 3/7365 useless extension candidates. Maximal degree in co-relation 43800. Up to 6307 conditions per place. [2024-06-14 11:33:34,528 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 138 selfloop transitions, 114 changer transitions 0/258 dead transitions. [2024-06-14 11:33:34,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 258 transitions, 4033 flow [2024-06-14 11:33:34,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:34,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:34,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 11:33:34,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 11:33:34,530 INFO L175 Difference]: Start difference. First operand has 173 places, 240 transitions, 3140 flow. Second operand 6 states and 145 transitions. [2024-06-14 11:33:34,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 258 transitions, 4033 flow [2024-06-14 11:33:35,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 258 transitions, 3850 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:35,047 INFO L231 Difference]: Finished difference. Result has 176 places, 245 transitions, 3281 flow [2024-06-14 11:33:35,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2963, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3281, PETRI_PLACES=176, PETRI_TRANSITIONS=245} [2024-06-14 11:33:35,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-14 11:33:35,048 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 245 transitions, 3281 flow [2024-06-14 11:33:35,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:35,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:35,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:35,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:33:35,049 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)] === [2024-06-14 11:33:35,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:35,049 INFO L85 PathProgramCache]: Analyzing trace with hash 895294479, now seen corresponding path program 3 times [2024-06-14 11:33:35,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:35,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428587225] [2024-06-14 11:33:35,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:35,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:35,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:35,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:35,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428587225] [2024-06-14 11:33:35,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428587225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:35,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:35,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645228278] [2024-06-14 11:33:35,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:35,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:35,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:35,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:35,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:35,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:35,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 245 transitions, 3281 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:35,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:35,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:35,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:36,135 INFO L124 PetriNetUnfolderBase]: 4270/7368 cut-off events. [2024-06-14 11:33:36,136 INFO L125 PetriNetUnfolderBase]: For 338257/338262 co-relation queries the response was YES. [2024-06-14 11:33:36,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44047 conditions, 7368 events. 4270/7368 cut-off events. For 338257/338262 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53771 event pairs, 1638 based on Foata normal form. 3/7358 useless extension candidates. Maximal degree in co-relation 43963. Up to 6303 conditions per place. [2024-06-14 11:33:36,222 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 142 selfloop transitions, 109 changer transitions 0/257 dead transitions. [2024-06-14 11:33:36,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 257 transitions, 3999 flow [2024-06-14 11:33:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:36,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:36,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:33:36,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 11:33:36,224 INFO L175 Difference]: Start difference. First operand has 176 places, 245 transitions, 3281 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:33:36,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 257 transitions, 3999 flow [2024-06-14 11:33:36,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 257 transitions, 3794 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 11:33:36,759 INFO L231 Difference]: Finished difference. Result has 179 places, 245 transitions, 3303 flow [2024-06-14 11:33:36,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3076, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3303, PETRI_PLACES=179, PETRI_TRANSITIONS=245} [2024-06-14 11:33:36,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-14 11:33:36,759 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 245 transitions, 3303 flow [2024-06-14 11:33:36,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:36,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:36,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:36,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:33:36,760 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)] === [2024-06-14 11:33:36,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1200862518, now seen corresponding path program 3 times [2024-06-14 11:33:36,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:36,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222718382] [2024-06-14 11:33:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:36,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:36,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:36,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:36,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222718382] [2024-06-14 11:33:36,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222718382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:36,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:36,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714471158] [2024-06-14 11:33:36,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:36,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:36,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:36,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:36,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:36,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:36,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 245 transitions, 3303 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:36,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:36,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:36,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:37,709 INFO L124 PetriNetUnfolderBase]: 4260/7338 cut-off events. [2024-06-14 11:33:37,710 INFO L125 PetriNetUnfolderBase]: For 348369/348372 co-relation queries the response was YES. [2024-06-14 11:33:37,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44146 conditions, 7338 events. 4260/7338 cut-off events. For 348369/348372 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 53526 event pairs, 1617 based on Foata normal form. 2/7333 useless extension candidates. Maximal degree in co-relation 44061. Up to 6299 conditions per place. [2024-06-14 11:33:37,782 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 152 selfloop transitions, 106 changer transitions 0/264 dead transitions. [2024-06-14 11:33:37,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 264 transitions, 4153 flow [2024-06-14 11:33:37,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:37,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:37,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 11:33:37,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 11:33:37,783 INFO L175 Difference]: Start difference. First operand has 179 places, 245 transitions, 3303 flow. Second operand 6 states and 149 transitions. [2024-06-14 11:33:37,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 264 transitions, 4153 flow [2024-06-14 11:33:38,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 264 transitions, 3714 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:33:38,234 INFO L231 Difference]: Finished difference. Result has 177 places, 245 transitions, 3085 flow [2024-06-14 11:33:38,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2864, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3085, PETRI_PLACES=177, PETRI_TRANSITIONS=245} [2024-06-14 11:33:38,234 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-14 11:33:38,234 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 245 transitions, 3085 flow [2024-06-14 11:33:38,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:38,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:38,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:38,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:33:38,235 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)] === [2024-06-14 11:33:38,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:38,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1345621588, now seen corresponding path program 4 times [2024-06-14 11:33:38,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:38,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622968224] [2024-06-14 11:33:38,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:38,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:38,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:38,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:38,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622968224] [2024-06-14 11:33:38,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622968224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:38,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:38,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:38,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958599581] [2024-06-14 11:33:38,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:38,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:38,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:38,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:38,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:38,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 245 transitions, 3085 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:38,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:38,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:38,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:39,215 INFO L124 PetriNetUnfolderBase]: 4236/7288 cut-off events. [2024-06-14 11:33:39,215 INFO L125 PetriNetUnfolderBase]: For 357329/357332 co-relation queries the response was YES. [2024-06-14 11:33:39,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43490 conditions, 7288 events. 4236/7288 cut-off events. For 357329/357332 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52864 event pairs, 1683 based on Foata normal form. 4/7285 useless extension candidates. Maximal degree in co-relation 43405. Up to 6281 conditions per place. [2024-06-14 11:33:39,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 150 selfloop transitions, 104 changer transitions 0/260 dead transitions. [2024-06-14 11:33:39,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 260 transitions, 3825 flow [2024-06-14 11:33:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:39,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:33:39,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:33:39,279 INFO L175 Difference]: Start difference. First operand has 177 places, 245 transitions, 3085 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:33:39,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 260 transitions, 3825 flow [2024-06-14 11:33:39,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 260 transitions, 3580 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:39,818 INFO L231 Difference]: Finished difference. Result has 178 places, 245 transitions, 3057 flow [2024-06-14 11:33:39,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2840, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3057, PETRI_PLACES=178, PETRI_TRANSITIONS=245} [2024-06-14 11:33:39,819 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-14 11:33:39,819 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 245 transitions, 3057 flow [2024-06-14 11:33:39,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:39,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:39,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:39,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:33:39,820 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:39,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:39,820 INFO L85 PathProgramCache]: Analyzing trace with hash -2012553172, now seen corresponding path program 5 times [2024-06-14 11:33:39,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:39,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101931763] [2024-06-14 11:33:39,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:39,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:39,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:39,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:39,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:39,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101931763] [2024-06-14 11:33:39,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101931763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:39,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:39,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:39,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610798188] [2024-06-14 11:33:39,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:39,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:39,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:39,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:39,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 245 transitions, 3057 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:39,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:39,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:39,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:40,715 INFO L124 PetriNetUnfolderBase]: 4213/7264 cut-off events. [2024-06-14 11:33:40,715 INFO L125 PetriNetUnfolderBase]: For 365783/365788 co-relation queries the response was YES. [2024-06-14 11:33:40,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43448 conditions, 7264 events. 4213/7264 cut-off events. For 365783/365788 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 52799 event pairs, 1702 based on Foata normal form. 2/7254 useless extension candidates. Maximal degree in co-relation 43362. Up to 6254 conditions per place. [2024-06-14 11:33:40,783 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 141 selfloop transitions, 109 changer transitions 1/257 dead transitions. [2024-06-14 11:33:40,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 257 transitions, 3787 flow [2024-06-14 11:33:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:40,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:40,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 11:33:40,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 11:33:40,784 INFO L175 Difference]: Start difference. First operand has 178 places, 245 transitions, 3057 flow. Second operand 6 states and 142 transitions. [2024-06-14 11:33:40,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 257 transitions, 3787 flow [2024-06-14 11:33:41,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 257 transitions, 3555 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:41,331 INFO L231 Difference]: Finished difference. Result has 179 places, 244 transitions, 3035 flow [2024-06-14 11:33:41,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=179, PETRI_TRANSITIONS=244} [2024-06-14 11:33:41,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-14 11:33:41,331 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 244 transitions, 3035 flow [2024-06-14 11:33:41,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:41,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:41,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:41,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:33:41,332 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:41,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:41,332 INFO L85 PathProgramCache]: Analyzing trace with hash -144126134, now seen corresponding path program 6 times [2024-06-14 11:33:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:41,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103759557] [2024-06-14 11:33:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:41,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:41,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:41,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:41,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:41,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103759557] [2024-06-14 11:33:41,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103759557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:41,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:41,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:41,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365892753] [2024-06-14 11:33:41,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:41,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:41,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:41,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:41,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:41,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:41,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 244 transitions, 3035 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:41,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:41,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:41,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:42,188 INFO L124 PetriNetUnfolderBase]: 4016/6883 cut-off events. [2024-06-14 11:33:42,188 INFO L125 PetriNetUnfolderBase]: For 375134/375139 co-relation queries the response was YES. [2024-06-14 11:33:42,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41846 conditions, 6883 events. 4016/6883 cut-off events. For 375134/375139 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 49108 event pairs, 1620 based on Foata normal form. 4/6874 useless extension candidates. Maximal degree in co-relation 41759. Up to 5919 conditions per place. [2024-06-14 11:33:42,255 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 144 selfloop transitions, 102 changer transitions 3/255 dead transitions. [2024-06-14 11:33:42,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 255 transitions, 3661 flow [2024-06-14 11:33:42,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:42,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 11:33:42,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 11:33:42,256 INFO L175 Difference]: Start difference. First operand has 179 places, 244 transitions, 3035 flow. Second operand 6 states and 143 transitions. [2024-06-14 11:33:42,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 255 transitions, 3661 flow [2024-06-14 11:33:42,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 255 transitions, 3417 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:42,881 INFO L231 Difference]: Finished difference. Result has 180 places, 241 transitions, 2951 flow [2024-06-14 11:33:42,881 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2791, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2951, PETRI_PLACES=180, PETRI_TRANSITIONS=241} [2024-06-14 11:33:42,882 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 11:33:42,882 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 241 transitions, 2951 flow [2024-06-14 11:33:42,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 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) [2024-06-14 11:33:42,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:42,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:42,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:33:42,883 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:42,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:42,883 INFO L85 PathProgramCache]: Analyzing trace with hash -510447225, now seen corresponding path program 1 times [2024-06-14 11:33:42,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:42,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006550882] [2024-06-14 11:33:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:42,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:42,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:42,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006550882] [2024-06-14 11:33:42,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006550882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:42,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:42,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:42,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787985305] [2024-06-14 11:33:42,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:42,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:42,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:42,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:42,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:42,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:42,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 241 transitions, 2951 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:42,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:42,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:42,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:43,786 INFO L124 PetriNetUnfolderBase]: 3995/6845 cut-off events. [2024-06-14 11:33:43,786 INFO L125 PetriNetUnfolderBase]: For 391855/391858 co-relation queries the response was YES. [2024-06-14 11:33:43,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42288 conditions, 6845 events. 3995/6845 cut-off events. For 391855/391858 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48744 event pairs, 1596 based on Foata normal form. 3/6841 useless extension candidates. Maximal degree in co-relation 42200. Up to 5866 conditions per place. [2024-06-14 11:33:43,848 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 110 changer transitions 1/267 dead transitions. [2024-06-14 11:33:43,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 267 transitions, 3967 flow [2024-06-14 11:33:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 11:33:43,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 11:33:43,850 INFO L175 Difference]: Start difference. First operand has 180 places, 241 transitions, 2951 flow. Second operand 6 states and 147 transitions. [2024-06-14 11:33:43,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 267 transitions, 3967 flow [2024-06-14 11:33:44,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 267 transitions, 3623 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-14 11:33:44,443 INFO L231 Difference]: Finished difference. Result has 178 places, 250 transitions, 2996 flow [2024-06-14 11:33:44,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2996, PETRI_PLACES=178, PETRI_TRANSITIONS=250} [2024-06-14 11:33:44,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-14 11:33:44,444 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 250 transitions, 2996 flow [2024-06-14 11:33:44,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:44,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:44,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:33:44,444 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:44,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:44,445 INFO L85 PathProgramCache]: Analyzing trace with hash 370128533, now seen corresponding path program 2 times [2024-06-14 11:33:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:44,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249935226] [2024-06-14 11:33:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:44,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:44,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249935226] [2024-06-14 11:33:44,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249935226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:44,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:44,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:44,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572709476] [2024-06-14 11:33:44,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:44,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:44,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:44,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:44,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:44,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 250 transitions, 2996 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:44,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:44,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:44,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:45,307 INFO L124 PetriNetUnfolderBase]: 3984/6831 cut-off events. [2024-06-14 11:33:45,308 INFO L125 PetriNetUnfolderBase]: For 401429/401432 co-relation queries the response was YES. [2024-06-14 11:33:45,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42305 conditions, 6831 events. 3984/6831 cut-off events. For 401429/401432 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 48698 event pairs, 1596 based on Foata normal form. 3/6827 useless extension candidates. Maximal degree in co-relation 42215. Up to 5859 conditions per place. [2024-06-14 11:33:45,375 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 146 selfloop transitions, 115 changer transitions 1/268 dead transitions. [2024-06-14 11:33:45,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 268 transitions, 3776 flow [2024-06-14 11:33:45,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:45,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:45,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 11:33:45,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:33:45,377 INFO L175 Difference]: Start difference. First operand has 178 places, 250 transitions, 2996 flow. Second operand 6 states and 150 transitions. [2024-06-14 11:33:45,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 268 transitions, 3776 flow [2024-06-14 11:33:46,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 268 transitions, 3637 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-14 11:33:46,088 INFO L231 Difference]: Finished difference. Result has 182 places, 249 transitions, 3083 flow [2024-06-14 11:33:46,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2857, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3083, PETRI_PLACES=182, PETRI_TRANSITIONS=249} [2024-06-14 11:33:46,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-14 11:33:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 249 transitions, 3083 flow [2024-06-14 11:33:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:46,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 11:33:46,090 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:46,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2005187851, now seen corresponding path program 3 times [2024-06-14 11:33:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525531827] [2024-06-14 11:33:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:46,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:46,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:46,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525531827] [2024-06-14 11:33:46,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525531827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:46,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:46,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:46,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606340121] [2024-06-14 11:33:46,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:46,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:46,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:46,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:46,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:46,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:46,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 249 transitions, 3083 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:46,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:46,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:46,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:46,931 INFO L124 PetriNetUnfolderBase]: 3912/6714 cut-off events. [2024-06-14 11:33:46,931 INFO L125 PetriNetUnfolderBase]: For 412012/412017 co-relation queries the response was YES. [2024-06-14 11:33:46,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42043 conditions, 6714 events. 3912/6714 cut-off events. For 412012/412017 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 47705 event pairs, 1606 based on Foata normal form. 3/6712 useless extension candidates. Maximal degree in co-relation 41952. Up to 5732 conditions per place. [2024-06-14 11:33:46,997 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 158 selfloop transitions, 93 changer transitions 3/260 dead transitions. [2024-06-14 11:33:46,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 260 transitions, 3725 flow [2024-06-14 11:33:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 11:33:46,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 11:33:46,998 INFO L175 Difference]: Start difference. First operand has 182 places, 249 transitions, 3083 flow. Second operand 6 states and 140 transitions. [2024-06-14 11:33:46,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 260 transitions, 3725 flow [2024-06-14 11:33:47,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 260 transitions, 3511 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:47,662 INFO L231 Difference]: Finished difference. Result has 184 places, 246 transitions, 3011 flow [2024-06-14 11:33:47,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3011, PETRI_PLACES=184, PETRI_TRANSITIONS=246} [2024-06-14 11:33:47,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-14 11:33:47,663 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 246 transitions, 3011 flow [2024-06-14 11:33:47,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:47,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:47,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:47,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 11:33:47,663 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:47,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:47,664 INFO L85 PathProgramCache]: Analyzing trace with hash -818748930, now seen corresponding path program 1 times [2024-06-14 11:33:47,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:47,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654090013] [2024-06-14 11:33:47,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:47,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:47,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:47,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654090013] [2024-06-14 11:33:47,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654090013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:47,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:47,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416565626] [2024-06-14 11:33:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:47,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:47,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:47,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:47,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 246 transitions, 3011 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:47,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:47,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:47,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:48,581 INFO L124 PetriNetUnfolderBase]: 3772/6455 cut-off events. [2024-06-14 11:33:48,581 INFO L125 PetriNetUnfolderBase]: For 442981/442983 co-relation queries the response was YES. [2024-06-14 11:33:48,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41816 conditions, 6455 events. 3772/6455 cut-off events. For 442981/442983 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45149 event pairs, 1286 based on Foata normal form. 12/6449 useless extension candidates. Maximal degree in co-relation 41724. Up to 4051 conditions per place. [2024-06-14 11:33:48,641 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 121 changer transitions 0/287 dead transitions. [2024-06-14 11:33:48,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 287 transitions, 3958 flow [2024-06-14 11:33:48,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:48,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 11:33:48,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-14 11:33:48,642 INFO L175 Difference]: Start difference. First operand has 184 places, 246 transitions, 3011 flow. Second operand 7 states and 185 transitions. [2024-06-14 11:33:48,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 287 transitions, 3958 flow [2024-06-14 11:33:49,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 287 transitions, 3537 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-14 11:33:49,484 INFO L231 Difference]: Finished difference. Result has 182 places, 249 transitions, 2901 flow [2024-06-14 11:33:49,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2590, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2901, PETRI_PLACES=182, PETRI_TRANSITIONS=249} [2024-06-14 11:33:49,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-14 11:33:49,485 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 249 transitions, 2901 flow [2024-06-14 11:33:49,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:49,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:49,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:49,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 11:33:49,486 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 11:33:49,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:49,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1604316848, now seen corresponding path program 2 times [2024-06-14 11:33:49,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:49,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827062561] [2024-06-14 11:33:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:49,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:49,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:49,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827062561] [2024-06-14 11:33:49,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827062561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:49,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:49,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:49,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064284240] [2024-06-14 11:33:49,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:49,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:49,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:49,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:49,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:49,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:49,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 249 transitions, 2901 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:49,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:49,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:49,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:50,347 INFO L124 PetriNetUnfolderBase]: 3816/6523 cut-off events. [2024-06-14 11:33:50,348 INFO L125 PetriNetUnfolderBase]: For 457612/457614 co-relation queries the response was YES. [2024-06-14 11:33:50,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42726 conditions, 6523 events. 3816/6523 cut-off events. For 457612/457614 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45716 event pairs, 1452 based on Foata normal form. 12/6517 useless extension candidates. Maximal degree in co-relation 42635. Up to 5526 conditions per place. [2024-06-14 11:33:50,410 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 114 changer transitions 0/280 dead transitions. [2024-06-14 11:33:50,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 280 transitions, 3700 flow [2024-06-14 11:33:50,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:50,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:33:50,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 11:33:50,412 INFO L175 Difference]: Start difference. First operand has 182 places, 249 transitions, 2901 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:33:50,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 280 transitions, 3700 flow [2024-06-14 11:33:51,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 280 transitions, 3463 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:51,030 INFO L231 Difference]: Finished difference. Result has 185 places, 252 transitions, 2968 flow [2024-06-14 11:33:51,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2968, PETRI_PLACES=185, PETRI_TRANSITIONS=252} [2024-06-14 11:33:51,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-14 11:33:51,031 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 252 transitions, 2968 flow [2024-06-14 11:33:51,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:51,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:51,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:51,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 11:33:51,032 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)] === [2024-06-14 11:33:51,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:51,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1317429518, now seen corresponding path program 3 times [2024-06-14 11:33:51,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:51,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760183508] [2024-06-14 11:33:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:51,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:51,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:51,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:51,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760183508] [2024-06-14 11:33:51,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760183508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:51,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:51,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:51,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075897160] [2024-06-14 11:33:51,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:51,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:51,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:51,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:51,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:51,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:51,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 252 transitions, 2968 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:51,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:51,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:51,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:51,916 INFO L124 PetriNetUnfolderBase]: 3860/6591 cut-off events. [2024-06-14 11:33:51,917 INFO L125 PetriNetUnfolderBase]: For 475392/475394 co-relation queries the response was YES. [2024-06-14 11:33:51,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43429 conditions, 6591 events. 3860/6591 cut-off events. For 475392/475394 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46226 event pairs, 1456 based on Foata normal form. 12/6585 useless extension candidates. Maximal degree in co-relation 43337. Up to 5594 conditions per place. [2024-06-14 11:33:51,977 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 160 selfloop transitions, 111 changer transitions 0/277 dead transitions. [2024-06-14 11:33:51,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 277 transitions, 3751 flow [2024-06-14 11:33:51,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:51,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:51,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:33:51,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 11:33:51,979 INFO L175 Difference]: Start difference. First operand has 185 places, 252 transitions, 2968 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:33:51,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 277 transitions, 3751 flow [2024-06-14 11:33:52,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 277 transitions, 3498 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:52,724 INFO L231 Difference]: Finished difference. Result has 187 places, 255 transitions, 3017 flow [2024-06-14 11:33:52,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2715, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3017, PETRI_PLACES=187, PETRI_TRANSITIONS=255} [2024-06-14 11:33:52,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 11:33:52,725 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 255 transitions, 3017 flow [2024-06-14 11:33:52,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:52,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:52,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:52,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 11:33:52,726 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)] === [2024-06-14 11:33:52,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:52,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1858107984, now seen corresponding path program 4 times [2024-06-14 11:33:52,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:52,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302308054] [2024-06-14 11:33:52,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:52,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:52,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:52,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:52,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:52,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302308054] [2024-06-14 11:33:52,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302308054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:52,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:52,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:33:52,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928991053] [2024-06-14 11:33:52,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:52,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:33:52,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:52,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:33:52,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:33:52,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:52,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 255 transitions, 3017 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:52,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:52,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:52,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:53,613 INFO L124 PetriNetUnfolderBase]: 3716/6345 cut-off events. [2024-06-14 11:33:53,613 INFO L125 PetriNetUnfolderBase]: For 471458/471463 co-relation queries the response was YES. [2024-06-14 11:33:53,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39455 conditions, 6345 events. 3716/6345 cut-off events. For 471458/471463 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44244 event pairs, 1373 based on Foata normal form. 54/6381 useless extension candidates. Maximal degree in co-relation 39362. Up to 5168 conditions per place. [2024-06-14 11:33:53,676 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 156 selfloop transitions, 111 changer transitions 0/273 dead transitions. [2024-06-14 11:33:53,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 273 transitions, 3717 flow [2024-06-14 11:33:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:33:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:33:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:33:53,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 11:33:53,677 INFO L175 Difference]: Start difference. First operand has 187 places, 255 transitions, 3017 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:33:53,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 273 transitions, 3717 flow [2024-06-14 11:33:54,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 273 transitions, 3448 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 11:33:54,401 INFO L231 Difference]: Finished difference. Result has 189 places, 255 transitions, 2978 flow [2024-06-14 11:33:54,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2748, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2978, PETRI_PLACES=189, PETRI_TRANSITIONS=255} [2024-06-14 11:33:54,402 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-14 11:33:54,402 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 255 transitions, 2978 flow [2024-06-14 11:33:54,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:54,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:54,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 11:33:54,402 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)] === [2024-06-14 11:33:54,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash 226802244, now seen corresponding path program 1 times [2024-06-14 11:33:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:54,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945781327] [2024-06-14 11:33:54,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:54,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:54,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:54,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:54,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945781327] [2024-06-14 11:33:54,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945781327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:54,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:54,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:54,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144240226] [2024-06-14 11:33:54,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:54,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:54,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:54,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:54,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:54,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:54,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 255 transitions, 2978 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:54,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:54,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:54,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:55,243 INFO L124 PetriNetUnfolderBase]: 3711/6361 cut-off events. [2024-06-14 11:33:55,243 INFO L125 PetriNetUnfolderBase]: For 387450/387455 co-relation queries the response was YES. [2024-06-14 11:33:55,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39198 conditions, 6361 events. 3711/6361 cut-off events. For 387450/387455 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44484 event pairs, 1306 based on Foata normal form. 6/6364 useless extension candidates. Maximal degree in co-relation 39104. Up to 5873 conditions per place. [2024-06-14 11:33:55,305 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 242 selfloop transitions, 20 changer transitions 0/268 dead transitions. [2024-06-14 11:33:55,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 268 transitions, 3566 flow [2024-06-14 11:33:55,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:55,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 11:33:55,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 11:33:55,307 INFO L175 Difference]: Start difference. First operand has 189 places, 255 transitions, 2978 flow. Second operand 6 states and 129 transitions. [2024-06-14 11:33:55,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 268 transitions, 3566 flow [2024-06-14 11:33:55,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 268 transitions, 3261 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 11:33:55,932 INFO L231 Difference]: Finished difference. Result has 188 places, 257 transitions, 2760 flow [2024-06-14 11:33:55,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2760, PETRI_PLACES=188, PETRI_TRANSITIONS=257} [2024-06-14 11:33:55,932 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 11:33:55,933 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 257 transitions, 2760 flow [2024-06-14 11:33:55,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:55,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:55,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:55,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 11:33:55,933 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)] === [2024-06-14 11:33:55,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:55,934 INFO L85 PathProgramCache]: Analyzing trace with hash 709118390, now seen corresponding path program 2 times [2024-06-14 11:33:55,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:55,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31805120] [2024-06-14 11:33:55,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:55,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:55,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:55,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:55,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31805120] [2024-06-14 11:33:55,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31805120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:55,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:55,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:55,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894813348] [2024-06-14 11:33:55,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:55,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:55,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:55,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:55,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:56,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:56,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 257 transitions, 2760 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:56,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:56,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:56,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:56,746 INFO L124 PetriNetUnfolderBase]: 3706/6366 cut-off events. [2024-06-14 11:33:56,746 INFO L125 PetriNetUnfolderBase]: For 392864/392869 co-relation queries the response was YES. [2024-06-14 11:33:56,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38397 conditions, 6366 events. 3706/6366 cut-off events. For 392864/392869 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44702 event pairs, 1286 based on Foata normal form. 6/6369 useless extension candidates. Maximal degree in co-relation 38302. Up to 5846 conditions per place. [2024-06-14 11:33:56,804 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 243 selfloop transitions, 22 changer transitions 0/271 dead transitions. [2024-06-14 11:33:56,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 271 transitions, 3360 flow [2024-06-14 11:33:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-14 11:33:56,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-14 11:33:56,806 INFO L175 Difference]: Start difference. First operand has 188 places, 257 transitions, 2760 flow. Second operand 6 states and 129 transitions. [2024-06-14 11:33:56,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 271 transitions, 3360 flow [2024-06-14 11:33:57,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 271 transitions, 3293 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:57,475 INFO L231 Difference]: Finished difference. Result has 190 places, 259 transitions, 2788 flow [2024-06-14 11:33:57,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2788, PETRI_PLACES=190, PETRI_TRANSITIONS=259} [2024-06-14 11:33:57,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 148 predicate places. [2024-06-14 11:33:57,476 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 259 transitions, 2788 flow [2024-06-14 11:33:57,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:57,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:57,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:57,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 11:33:57,476 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)] === [2024-06-14 11:33:57,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:57,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1461589258, now seen corresponding path program 1 times [2024-06-14 11:33:57,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:57,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758890377] [2024-06-14 11:33:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:57,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:57,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:57,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:57,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:57,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758890377] [2024-06-14 11:33:57,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758890377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:57,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:57,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:57,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800824535] [2024-06-14 11:33:57,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:57,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:57,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:57,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:57,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:57,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:57,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 259 transitions, 2788 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:57,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:57,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:57,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:58,339 INFO L124 PetriNetUnfolderBase]: 3714/6376 cut-off events. [2024-06-14 11:33:58,339 INFO L125 PetriNetUnfolderBase]: For 406621/406621 co-relation queries the response was YES. [2024-06-14 11:33:58,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38753 conditions, 6376 events. 3714/6376 cut-off events. For 406621/406621 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44739 event pairs, 1205 based on Foata normal form. 2/6376 useless extension candidates. Maximal degree in co-relation 38657. Up to 5843 conditions per place. [2024-06-14 11:33:58,398 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 254 selfloop transitions, 22 changer transitions 0/282 dead transitions. [2024-06-14 11:33:58,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 282 transitions, 3576 flow [2024-06-14 11:33:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:58,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 11:33:58,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 11:33:58,400 INFO L175 Difference]: Start difference. First operand has 190 places, 259 transitions, 2788 flow. Second operand 6 states and 136 transitions. [2024-06-14 11:33:58,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 282 transitions, 3576 flow [2024-06-14 11:33:59,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 282 transitions, 3497 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 11:33:59,083 INFO L231 Difference]: Finished difference. Result has 192 places, 263 transitions, 2830 flow [2024-06-14 11:33:59,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2830, PETRI_PLACES=192, PETRI_TRANSITIONS=263} [2024-06-14 11:33:59,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 11:33:59,084 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 263 transitions, 2830 flow [2024-06-14 11:33:59,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:59,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:33:59,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:33:59,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 11:33:59,084 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)] === [2024-06-14 11:33:59,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:33:59,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1461649708, now seen corresponding path program 2 times [2024-06-14 11:33:59,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:33:59,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019599208] [2024-06-14 11:33:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:33:59,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:33:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:33:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:33:59,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:33:59,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019599208] [2024-06-14 11:33:59,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019599208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:33:59,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:33:59,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:33:59,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50078245] [2024-06-14 11:33:59,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:33:59,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:33:59,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:33:59,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:33:59,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:33:59,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:33:59,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 263 transitions, 2830 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:33:59,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:33:59,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:33:59,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:33:59,894 INFO L124 PetriNetUnfolderBase]: 3709/6369 cut-off events. [2024-06-14 11:33:59,894 INFO L125 PetriNetUnfolderBase]: For 415658/415658 co-relation queries the response was YES. [2024-06-14 11:33:59,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38797 conditions, 6369 events. 3709/6369 cut-off events. For 415658/415658 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 44723 event pairs, 1300 based on Foata normal form. 2/6369 useless extension candidates. Maximal degree in co-relation 38700. Up to 5871 conditions per place. [2024-06-14 11:33:59,957 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 251 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-14 11:33:59,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 277 transitions, 3406 flow [2024-06-14 11:33:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:33:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:33:59,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-14 11:33:59,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 11:33:59,958 INFO L175 Difference]: Start difference. First operand has 192 places, 263 transitions, 2830 flow. Second operand 6 states and 132 transitions. [2024-06-14 11:33:59,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 277 transitions, 3406 flow [2024-06-14 11:34:00,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 277 transitions, 3335 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:00,711 INFO L231 Difference]: Finished difference. Result has 196 places, 263 transitions, 2804 flow [2024-06-14 11:34:00,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2804, PETRI_PLACES=196, PETRI_TRANSITIONS=263} [2024-06-14 11:34:00,712 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 11:34:00,712 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 263 transitions, 2804 flow [2024-06-14 11:34:00,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:00,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:00,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:00,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 11:34:00,713 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)] === [2024-06-14 11:34:00,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1579922086, now seen corresponding path program 1 times [2024-06-14 11:34:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:00,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668568160] [2024-06-14 11:34:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:00,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:00,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:00,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:00,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668568160] [2024-06-14 11:34:00,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668568160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:00,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:00,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:00,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285742549] [2024-06-14 11:34:00,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:00,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:00,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:00,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:00,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:00,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:00,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 263 transitions, 2804 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:00,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:00,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:00,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:01,603 INFO L124 PetriNetUnfolderBase]: 3885/6638 cut-off events. [2024-06-14 11:34:01,603 INFO L125 PetriNetUnfolderBase]: For 536829/536832 co-relation queries the response was YES. [2024-06-14 11:34:01,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40256 conditions, 6638 events. 3885/6638 cut-off events. For 536829/536832 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 46849 event pairs, 1410 based on Foata normal form. 54/6685 useless extension candidates. Maximal degree in co-relation 40157. Up to 5443 conditions per place. [2024-06-14 11:34:01,669 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 170 selfloop transitions, 111 changer transitions 0/287 dead transitions. [2024-06-14 11:34:01,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 287 transitions, 3614 flow [2024-06-14 11:34:01,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:01,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:34:01,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:34:01,670 INFO L175 Difference]: Start difference. First operand has 196 places, 263 transitions, 2804 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:34:01,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 287 transitions, 3614 flow [2024-06-14 11:34:02,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 287 transitions, 3564 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:02,432 INFO L231 Difference]: Finished difference. Result has 198 places, 266 transitions, 3054 flow [2024-06-14 11:34:02,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2754, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3054, PETRI_PLACES=198, PETRI_TRANSITIONS=266} [2024-06-14 11:34:02,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 11:34:02,433 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 266 transitions, 3054 flow [2024-06-14 11:34:02,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:02,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:02,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:02,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 11:34:02,433 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)] === [2024-06-14 11:34:02,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:02,434 INFO L85 PathProgramCache]: Analyzing trace with hash -2031272734, now seen corresponding path program 2 times [2024-06-14 11:34:02,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:02,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810271252] [2024-06-14 11:34:02,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:02,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:02,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:02,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:02,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810271252] [2024-06-14 11:34:02,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810271252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:02,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:02,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:02,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481431799] [2024-06-14 11:34:02,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:02,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:02,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:02,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:02,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:02,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:02,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 266 transitions, 3054 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:02,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:02,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:02,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:03,330 INFO L124 PetriNetUnfolderBase]: 3929/6722 cut-off events. [2024-06-14 11:34:03,331 INFO L125 PetriNetUnfolderBase]: For 470045/470050 co-relation queries the response was YES. [2024-06-14 11:34:03,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41680 conditions, 6722 events. 3929/6722 cut-off events. For 470045/470050 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 47605 event pairs, 1446 based on Foata normal form. 12/6718 useless extension candidates. Maximal degree in co-relation 41580. Up to 5709 conditions per place. [2024-06-14 11:34:03,396 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 162 selfloop transitions, 117 changer transitions 0/285 dead transitions. [2024-06-14 11:34:03,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 285 transitions, 3852 flow [2024-06-14 11:34:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:03,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:03,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:34:03,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:34:03,397 INFO L175 Difference]: Start difference. First operand has 198 places, 266 transitions, 3054 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:34:03,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 285 transitions, 3852 flow [2024-06-14 11:34:04,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 285 transitions, 3582 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:04,129 INFO L231 Difference]: Finished difference. Result has 200 places, 269 transitions, 3101 flow [2024-06-14 11:34:04,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3101, PETRI_PLACES=200, PETRI_TRANSITIONS=269} [2024-06-14 11:34:04,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 158 predicate places. [2024-06-14 11:34:04,129 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 269 transitions, 3101 flow [2024-06-14 11:34:04,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:04,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:04,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:04,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 11:34:04,130 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)] === [2024-06-14 11:34:04,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:04,130 INFO L85 PathProgramCache]: Analyzing trace with hash 472652312, now seen corresponding path program 3 times [2024-06-14 11:34:04,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:04,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352009390] [2024-06-14 11:34:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:04,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:04,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:04,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:04,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:04,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352009390] [2024-06-14 11:34:04,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352009390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:04,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:04,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:04,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993493964] [2024-06-14 11:34:04,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:04,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:04,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:04,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:04,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:04,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:04,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 269 transitions, 3101 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:04,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:04,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:04,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:05,108 INFO L124 PetriNetUnfolderBase]: 3973/6790 cut-off events. [2024-06-14 11:34:05,108 INFO L125 PetriNetUnfolderBase]: For 483363/483368 co-relation queries the response was YES. [2024-06-14 11:34:05,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42020 conditions, 6790 events. 3973/6790 cut-off events. For 483363/483368 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 48004 event pairs, 1458 based on Foata normal form. 12/6786 useless extension candidates. Maximal degree in co-relation 41919. Up to 5777 conditions per place. [2024-06-14 11:34:05,177 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 168 selfloop transitions, 114 changer transitions 0/288 dead transitions. [2024-06-14 11:34:05,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 288 transitions, 3913 flow [2024-06-14 11:34:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:34:05,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:34:05,178 INFO L175 Difference]: Start difference. First operand has 200 places, 269 transitions, 3101 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:34:05,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 288 transitions, 3913 flow [2024-06-14 11:34:05,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 288 transitions, 3622 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:05,948 INFO L231 Difference]: Finished difference. Result has 202 places, 272 transitions, 3127 flow [2024-06-14 11:34:05,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2810, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3127, PETRI_PLACES=202, PETRI_TRANSITIONS=272} [2024-06-14 11:34:05,949 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-14 11:34:05,949 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 272 transitions, 3127 flow [2024-06-14 11:34:05,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:05,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:05,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:05,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 11:34:05,950 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)] === [2024-06-14 11:34:05,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:05,950 INFO L85 PathProgramCache]: Analyzing trace with hash 241092996, now seen corresponding path program 4 times [2024-06-14 11:34:05,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:05,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969491175] [2024-06-14 11:34:05,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:05,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:05,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969491175] [2024-06-14 11:34:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969491175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:06,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:06,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:06,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910972974] [2024-06-14 11:34:06,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:06,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:06,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:06,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:06,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:06,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:06,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 272 transitions, 3127 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:06,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:06,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:06,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:06,929 INFO L124 PetriNetUnfolderBase]: 4233/7200 cut-off events. [2024-06-14 11:34:06,930 INFO L125 PetriNetUnfolderBase]: For 585246/585251 co-relation queries the response was YES. [2024-06-14 11:34:06,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46624 conditions, 7200 events. 4233/7200 cut-off events. For 585246/585251 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 51244 event pairs, 1538 based on Foata normal form. 12/7196 useless extension candidates. Maximal degree in co-relation 46522. Up to 5438 conditions per place. [2024-06-14 11:34:07,001 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 172 selfloop transitions, 122 changer transitions 0/300 dead transitions. [2024-06-14 11:34:07,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 300 transitions, 4175 flow [2024-06-14 11:34:07,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:34:07,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:34:07,003 INFO L175 Difference]: Start difference. First operand has 202 places, 272 transitions, 3127 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:34:07,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 300 transitions, 4175 flow [2024-06-14 11:34:08,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 300 transitions, 3884 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:08,148 INFO L231 Difference]: Finished difference. Result has 205 places, 277 transitions, 3253 flow [2024-06-14 11:34:08,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2836, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3253, PETRI_PLACES=205, PETRI_TRANSITIONS=277} [2024-06-14 11:34:08,149 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 11:34:08,149 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 277 transitions, 3253 flow [2024-06-14 11:34:08,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:08,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:08,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:08,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 11:34:08,150 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)] === [2024-06-14 11:34:08,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash 388588660, now seen corresponding path program 1 times [2024-06-14 11:34:08,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:08,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561729006] [2024-06-14 11:34:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:08,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:08,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:08,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:08,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561729006] [2024-06-14 11:34:08,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561729006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:08,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:08,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:08,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117965835] [2024-06-14 11:34:08,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:08,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:08,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:08,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:08,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:08,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:08,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 277 transitions, 3253 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:08,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:08,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:08,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:09,347 INFO L124 PetriNetUnfolderBase]: 4701/8037 cut-off events. [2024-06-14 11:34:09,347 INFO L125 PetriNetUnfolderBase]: For 827930/827937 co-relation queries the response was YES. [2024-06-14 11:34:09,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54948 conditions, 8037 events. 4701/8037 cut-off events. For 827930/827937 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 58741 event pairs, 1656 based on Foata normal form. 40/8073 useless extension candidates. Maximal degree in co-relation 54844. Up to 4673 conditions per place. [2024-06-14 11:34:09,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 101 changer transitions 11/321 dead transitions. [2024-06-14 11:34:09,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 321 transitions, 4424 flow [2024-06-14 11:34:09,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:09,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:09,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 11:34:09,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-14 11:34:09,431 INFO L175 Difference]: Start difference. First operand has 205 places, 277 transitions, 3253 flow. Second operand 7 states and 179 transitions. [2024-06-14 11:34:09,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 321 transitions, 4424 flow [2024-06-14 11:34:10,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 321 transitions, 3999 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:10,410 INFO L231 Difference]: Finished difference. Result has 207 places, 276 transitions, 3155 flow [2024-06-14 11:34:10,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2862, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3155, PETRI_PLACES=207, PETRI_TRANSITIONS=276} [2024-06-14 11:34:10,410 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 11:34:10,411 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 276 transitions, 3155 flow [2024-06-14 11:34:10,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:10,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:10,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:10,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 11:34:10,411 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)] === [2024-06-14 11:34:10,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:10,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1079490726, now seen corresponding path program 2 times [2024-06-14 11:34:10,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:10,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703179817] [2024-06-14 11:34:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:10,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:10,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:10,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:10,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703179817] [2024-06-14 11:34:10,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703179817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:10,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:10,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062725410] [2024-06-14 11:34:10,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:10,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:10,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:10,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:10,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:10,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:10,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 276 transitions, 3155 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:10,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:10,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:10,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:11,625 INFO L124 PetriNetUnfolderBase]: 4833/8276 cut-off events. [2024-06-14 11:34:11,625 INFO L125 PetriNetUnfolderBase]: For 943172/943179 co-relation queries the response was YES. [2024-06-14 11:34:11,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58037 conditions, 8276 events. 4833/8276 cut-off events. For 943172/943179 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 61151 event pairs, 1885 based on Foata normal form. 40/8312 useless extension candidates. Maximal degree in co-relation 57933. Up to 6690 conditions per place. [2024-06-14 11:34:11,712 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 200 selfloop transitions, 101 changer transitions 4/311 dead transitions. [2024-06-14 11:34:11,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 311 transitions, 4214 flow [2024-06-14 11:34:11,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:11,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:11,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-14 11:34:11,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6062717770034843 [2024-06-14 11:34:11,714 INFO L175 Difference]: Start difference. First operand has 207 places, 276 transitions, 3155 flow. Second operand 7 states and 174 transitions. [2024-06-14 11:34:11,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 311 transitions, 4214 flow [2024-06-14 11:34:13,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 311 transitions, 3918 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:13,021 INFO L231 Difference]: Finished difference. Result has 210 places, 279 transitions, 3155 flow [2024-06-14 11:34:13,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2863, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3155, PETRI_PLACES=210, PETRI_TRANSITIONS=279} [2024-06-14 11:34:13,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 11:34:13,022 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 279 transitions, 3155 flow [2024-06-14 11:34:13,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:13,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:13,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:13,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 11:34:13,022 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)] === [2024-06-14 11:34:13,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:13,023 INFO L85 PathProgramCache]: Analyzing trace with hash 373172002, now seen corresponding path program 3 times [2024-06-14 11:34:13,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:13,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429025240] [2024-06-14 11:34:13,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:13,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:13,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:13,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429025240] [2024-06-14 11:34:13,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429025240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:13,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:13,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:13,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382759443] [2024-06-14 11:34:13,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:13,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:13,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:13,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:13,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:13,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:13,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 279 transitions, 3155 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:13,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:13,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:13,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:14,176 INFO L124 PetriNetUnfolderBase]: 4716/8096 cut-off events. [2024-06-14 11:34:14,176 INFO L125 PetriNetUnfolderBase]: For 884289/884296 co-relation queries the response was YES. [2024-06-14 11:34:14,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54767 conditions, 8096 events. 4716/8096 cut-off events. For 884289/884296 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 59788 event pairs, 1889 based on Foata normal form. 46/8138 useless extension candidates. Maximal degree in co-relation 54662. Up to 6852 conditions per place. [2024-06-14 11:34:14,260 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 197 selfloop transitions, 93 changer transitions 7/303 dead transitions. [2024-06-14 11:34:14,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 303 transitions, 3953 flow [2024-06-14 11:34:14,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:14,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:14,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:34:14,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 11:34:14,262 INFO L175 Difference]: Start difference. First operand has 210 places, 279 transitions, 3155 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:34:14,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 303 transitions, 3953 flow [2024-06-14 11:34:15,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 303 transitions, 3701 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:15,371 INFO L231 Difference]: Finished difference. Result has 213 places, 274 transitions, 3046 flow [2024-06-14 11:34:15,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2903, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3046, PETRI_PLACES=213, PETRI_TRANSITIONS=274} [2024-06-14 11:34:15,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-14 11:34:15,372 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 274 transitions, 3046 flow [2024-06-14 11:34:15,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:15,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:15,372 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] [2024-06-14 11:34:15,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 11:34:15,372 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)] === [2024-06-14 11:34:15,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:15,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1186671558, now seen corresponding path program 4 times [2024-06-14 11:34:15,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:15,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837234796] [2024-06-14 11:34:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:15,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:15,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:15,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:15,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:15,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837234796] [2024-06-14 11:34:15,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837234796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:15,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:15,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:15,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098785913] [2024-06-14 11:34:15,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:15,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:15,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:15,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:15,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:15,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:15,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 274 transitions, 3046 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:15,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:15,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:15,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:16,505 INFO L124 PetriNetUnfolderBase]: 4634/7917 cut-off events. [2024-06-14 11:34:16,506 INFO L125 PetriNetUnfolderBase]: For 907514/907519 co-relation queries the response was YES. [2024-06-14 11:34:16,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54274 conditions, 7917 events. 4634/7917 cut-off events. For 907514/907519 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 58033 event pairs, 1841 based on Foata normal form. 42/7943 useless extension candidates. Maximal degree in co-relation 54168. Up to 6724 conditions per place. [2024-06-14 11:34:16,589 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 175 selfloop transitions, 110 changer transitions 3/294 dead transitions. [2024-06-14 11:34:16,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 294 transitions, 3852 flow [2024-06-14 11:34:16,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 11:34:16,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 11:34:16,590 INFO L175 Difference]: Start difference. First operand has 213 places, 274 transitions, 3046 flow. Second operand 7 states and 165 transitions. [2024-06-14 11:34:16,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 294 transitions, 3852 flow [2024-06-14 11:34:17,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 294 transitions, 3658 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:17,951 INFO L231 Difference]: Finished difference. Result has 214 places, 275 transitions, 3106 flow [2024-06-14 11:34:17,951 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2852, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3106, PETRI_PLACES=214, PETRI_TRANSITIONS=275} [2024-06-14 11:34:17,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 11:34:17,952 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 275 transitions, 3106 flow [2024-06-14 11:34:17,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:17,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:17,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:17,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 11:34:17,953 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)] === [2024-06-14 11:34:17,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:17,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1384261956, now seen corresponding path program 5 times [2024-06-14 11:34:17,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:17,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293360682] [2024-06-14 11:34:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:17,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:18,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293360682] [2024-06-14 11:34:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293360682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:18,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:18,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689789113] [2024-06-14 11:34:18,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:18,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:18,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:18,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:18,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 275 transitions, 3106 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:18,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:18,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:18,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:19,389 INFO L124 PetriNetUnfolderBase]: 4534/7769 cut-off events. [2024-06-14 11:34:19,389 INFO L125 PetriNetUnfolderBase]: For 826308/826313 co-relation queries the response was YES. [2024-06-14 11:34:19,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51176 conditions, 7769 events. 4534/7769 cut-off events. For 826308/826313 co-relation queries the response was YES. Maximal size of possible extension queue 536. Compared 56903 event pairs, 1783 based on Foata normal form. 42/7795 useless extension candidates. Maximal degree in co-relation 51069. Up to 6576 conditions per place. [2024-06-14 11:34:19,472 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 181 selfloop transitions, 104 changer transitions 3/294 dead transitions. [2024-06-14 11:34:19,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 294 transitions, 3893 flow [2024-06-14 11:34:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:19,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:34:19,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:34:19,473 INFO L175 Difference]: Start difference. First operand has 214 places, 275 transitions, 3106 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:34:19,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 294 transitions, 3893 flow [2024-06-14 11:34:20,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 294 transitions, 3653 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:20,914 INFO L231 Difference]: Finished difference. Result has 216 places, 275 transitions, 3085 flow [2024-06-14 11:34:20,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3085, PETRI_PLACES=216, PETRI_TRANSITIONS=275} [2024-06-14 11:34:20,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 11:34:20,916 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 275 transitions, 3085 flow [2024-06-14 11:34:20,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:20,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:20,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:20,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 11:34:20,916 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)] === [2024-06-14 11:34:20,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:20,917 INFO L85 PathProgramCache]: Analyzing trace with hash 676418210, now seen corresponding path program 6 times [2024-06-14 11:34:20,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:20,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410239252] [2024-06-14 11:34:20,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:20,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:21,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:21,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:21,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410239252] [2024-06-14 11:34:21,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410239252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:21,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:21,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:21,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958762996] [2024-06-14 11:34:21,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:21,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:21,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:21,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:21,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:21,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:21,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 275 transitions, 3085 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:21,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:21,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:21,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:22,309 INFO L124 PetriNetUnfolderBase]: 4566/7833 cut-off events. [2024-06-14 11:34:22,309 INFO L125 PetriNetUnfolderBase]: For 801223/801228 co-relation queries the response was YES. [2024-06-14 11:34:22,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50460 conditions, 7833 events. 4566/7833 cut-off events. For 801223/801228 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 57455 event pairs, 1731 based on Foata normal form. 36/7851 useless extension candidates. Maximal degree in co-relation 50352. Up to 5980 conditions per place. [2024-06-14 11:34:22,408 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 177 selfloop transitions, 110 changer transitions 7/300 dead transitions. [2024-06-14 11:34:22,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 300 transitions, 3917 flow [2024-06-14 11:34:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 11:34:22,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:34:22,409 INFO L175 Difference]: Start difference. First operand has 216 places, 275 transitions, 3085 flow. Second operand 7 states and 168 transitions. [2024-06-14 11:34:22,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 300 transitions, 3917 flow [2024-06-14 11:34:24,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 300 transitions, 3685 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:24,267 INFO L231 Difference]: Finished difference. Result has 218 places, 274 transitions, 3077 flow [2024-06-14 11:34:24,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2853, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3077, PETRI_PLACES=218, PETRI_TRANSITIONS=274} [2024-06-14 11:34:24,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 11:34:24,268 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 274 transitions, 3077 flow [2024-06-14 11:34:24,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:24,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:24,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:24,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 11:34:24,268 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)] === [2024-06-14 11:34:24,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:24,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1395703560, now seen corresponding path program 1 times [2024-06-14 11:34:24,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:24,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394154773] [2024-06-14 11:34:24,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:24,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:24,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:24,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:24,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:24,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394154773] [2024-06-14 11:34:24,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394154773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:24,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:24,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:24,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973750097] [2024-06-14 11:34:24,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:24,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:24,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:24,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:24,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:24,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:24,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 274 transitions, 3077 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:24,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:24,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:24,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:25,550 INFO L124 PetriNetUnfolderBase]: 4437/7634 cut-off events. [2024-06-14 11:34:25,551 INFO L125 PetriNetUnfolderBase]: For 725495/725500 co-relation queries the response was YES. [2024-06-14 11:34:25,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47358 conditions, 7634 events. 4437/7634 cut-off events. For 725495/725500 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 55781 event pairs, 1653 based on Foata normal form. 36/7654 useless extension candidates. Maximal degree in co-relation 47249. Up to 5573 conditions per place. [2024-06-14 11:34:25,625 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 170 selfloop transitions, 119 changer transitions 3/298 dead transitions. [2024-06-14 11:34:25,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 298 transitions, 3879 flow [2024-06-14 11:34:25,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:25,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:25,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:34:25,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:34:25,626 INFO L175 Difference]: Start difference. First operand has 218 places, 274 transitions, 3077 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:34:25,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 298 transitions, 3879 flow [2024-06-14 11:34:26,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 298 transitions, 3573 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 11:34:26,924 INFO L231 Difference]: Finished difference. Result has 219 places, 274 transitions, 3018 flow [2024-06-14 11:34:26,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2771, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3018, PETRI_PLACES=219, PETRI_TRANSITIONS=274} [2024-06-14 11:34:26,925 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 11:34:26,925 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 274 transitions, 3018 flow [2024-06-14 11:34:26,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:26,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:26,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:26,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 11:34:26,926 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)] === [2024-06-14 11:34:26,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:26,926 INFO L85 PathProgramCache]: Analyzing trace with hash 65006152, now seen corresponding path program 2 times [2024-06-14 11:34:26,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:26,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180475292] [2024-06-14 11:34:26,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:26,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:26,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:26,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180475292] [2024-06-14 11:34:26,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180475292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:26,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:26,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:26,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764190737] [2024-06-14 11:34:26,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:26,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:26,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:26,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:26,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:27,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:27,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 274 transitions, 3018 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:27,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:27,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:27,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:28,062 INFO L124 PetriNetUnfolderBase]: 4574/7849 cut-off events. [2024-06-14 11:34:28,063 INFO L125 PetriNetUnfolderBase]: For 740477/740482 co-relation queries the response was YES. [2024-06-14 11:34:28,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48180 conditions, 7849 events. 4574/7849 cut-off events. For 740477/740482 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 57676 event pairs, 1667 based on Foata normal form. 42/7867 useless extension candidates. Maximal degree in co-relation 48070. Up to 6136 conditions per place. [2024-06-14 11:34:28,147 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 109 changer transitions 0/309 dead transitions. [2024-06-14 11:34:28,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 309 transitions, 4224 flow [2024-06-14 11:34:28,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:28,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:28,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 11:34:28,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 11:34:28,149 INFO L175 Difference]: Start difference. First operand has 219 places, 274 transitions, 3018 flow. Second operand 7 states and 172 transitions. [2024-06-14 11:34:28,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 309 transitions, 4224 flow [2024-06-14 11:34:29,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 309 transitions, 3906 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 11:34:29,356 INFO L231 Difference]: Finished difference. Result has 219 places, 284 transitions, 3194 flow [2024-06-14 11:34:29,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2700, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3194, PETRI_PLACES=219, PETRI_TRANSITIONS=284} [2024-06-14 11:34:29,356 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 11:34:29,356 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 284 transitions, 3194 flow [2024-06-14 11:34:29,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:29,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:29,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:29,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 11:34:29,357 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)] === [2024-06-14 11:34:29,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash 507834952, now seen corresponding path program 3 times [2024-06-14 11:34:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:29,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674412700] [2024-06-14 11:34:29,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:29,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:29,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:29,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674412700] [2024-06-14 11:34:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674412700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:29,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:29,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:29,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888386065] [2024-06-14 11:34:29,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:29,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:29,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:29,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:29,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:29,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:29,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 284 transitions, 3194 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:29,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:29,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:29,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:30,647 INFO L124 PetriNetUnfolderBase]: 5128/8801 cut-off events. [2024-06-14 11:34:30,647 INFO L125 PetriNetUnfolderBase]: For 972676/972681 co-relation queries the response was YES. [2024-06-14 11:34:30,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59003 conditions, 8801 events. 5128/8801 cut-off events. For 972676/972681 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 65775 event pairs, 1784 based on Foata normal form. 42/8819 useless extension candidates. Maximal degree in co-relation 58893. Up to 4649 conditions per place. [2024-06-14 11:34:30,735 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 208 selfloop transitions, 116 changer transitions 0/330 dead transitions. [2024-06-14 11:34:30,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 330 transitions, 4747 flow [2024-06-14 11:34:30,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:30,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:34:30,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-14 11:34:30,736 INFO L175 Difference]: Start difference. First operand has 219 places, 284 transitions, 3194 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:34:30,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 330 transitions, 4747 flow [2024-06-14 11:34:32,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 330 transitions, 4542 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:32,539 INFO L231 Difference]: Finished difference. Result has 225 places, 293 transitions, 3538 flow [2024-06-14 11:34:32,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2989, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3538, PETRI_PLACES=225, PETRI_TRANSITIONS=293} [2024-06-14 11:34:32,539 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-14 11:34:32,540 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 293 transitions, 3538 flow [2024-06-14 11:34:32,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:32,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:32,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:32,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 11:34:32,540 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)] === [2024-06-14 11:34:32,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:32,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1944709438, now seen corresponding path program 1 times [2024-06-14 11:34:32,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:32,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187330550] [2024-06-14 11:34:32,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:32,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:32,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:32,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187330550] [2024-06-14 11:34:32,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187330550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:32,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:32,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:32,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591212599] [2024-06-14 11:34:32,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:32,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:32,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:32,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:32,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:32,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:32,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 293 transitions, 3538 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:32,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:32,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:32,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:33,981 INFO L124 PetriNetUnfolderBase]: 5606/9655 cut-off events. [2024-06-14 11:34:33,981 INFO L125 PetriNetUnfolderBase]: For 1200637/1200640 co-relation queries the response was YES. [2024-06-14 11:34:34,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68863 conditions, 9655 events. 5606/9655 cut-off events. For 1200637/1200640 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 74424 event pairs, 1807 based on Foata normal form. 42/9690 useless extension candidates. Maximal degree in co-relation 68749. Up to 5439 conditions per place. [2024-06-14 11:34:34,098 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 116 changer transitions 0/345 dead transitions. [2024-06-14 11:34:34,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 345 transitions, 5221 flow [2024-06-14 11:34:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:34,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:34,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-14 11:34:34,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6376306620209059 [2024-06-14 11:34:34,100 INFO L175 Difference]: Start difference. First operand has 225 places, 293 transitions, 3538 flow. Second operand 7 states and 183 transitions. [2024-06-14 11:34:34,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 345 transitions, 5221 flow [2024-06-14 11:34:36,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 345 transitions, 4848 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:36,191 INFO L231 Difference]: Finished difference. Result has 229 places, 303 transitions, 3817 flow [2024-06-14 11:34:36,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3196, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3817, PETRI_PLACES=229, PETRI_TRANSITIONS=303} [2024-06-14 11:34:36,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-14 11:34:36,191 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 303 transitions, 3817 flow [2024-06-14 11:34:36,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:36,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:36,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:36,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 11:34:36,192 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)] === [2024-06-14 11:34:36,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1846805784, now seen corresponding path program 2 times [2024-06-14 11:34:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:36,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147463647] [2024-06-14 11:34:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:36,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:36,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:36,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147463647] [2024-06-14 11:34:36,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147463647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:36,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:36,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:36,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060780743] [2024-06-14 11:34:36,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:36,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:36,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:36,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:36,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:36,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:36,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 303 transitions, 3817 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:36,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:36,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:36,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:37,711 INFO L124 PetriNetUnfolderBase]: 5502/9475 cut-off events. [2024-06-14 11:34:37,711 INFO L125 PetriNetUnfolderBase]: For 1071115/1071118 co-relation queries the response was YES. [2024-06-14 11:34:37,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64693 conditions, 9475 events. 5502/9475 cut-off events. For 1071115/1071118 co-relation queries the response was YES. Maximal size of possible extension queue 677. Compared 72591 event pairs, 2119 based on Foata normal form. 42/9510 useless extension candidates. Maximal degree in co-relation 64578. Up to 7627 conditions per place. [2024-06-14 11:34:37,822 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 114 changer transitions 0/341 dead transitions. [2024-06-14 11:34:37,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 341 transitions, 5183 flow [2024-06-14 11:34:37,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:37,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-14 11:34:37,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 11:34:37,823 INFO L175 Difference]: Start difference. First operand has 229 places, 303 transitions, 3817 flow. Second operand 7 states and 175 transitions. [2024-06-14 11:34:37,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 341 transitions, 5183 flow [2024-06-14 11:34:39,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 341 transitions, 4952 flow, removed 58 selfloop flow, removed 2 redundant places. [2024-06-14 11:34:39,784 INFO L231 Difference]: Finished difference. Result has 235 places, 313 transitions, 4172 flow [2024-06-14 11:34:39,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4172, PETRI_PLACES=235, PETRI_TRANSITIONS=313} [2024-06-14 11:34:39,785 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 11:34:39,785 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 313 transitions, 4172 flow [2024-06-14 11:34:39,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:39,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:39,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:39,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 11:34:39,786 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)] === [2024-06-14 11:34:39,786 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:39,786 INFO L85 PathProgramCache]: Analyzing trace with hash -494079652, now seen corresponding path program 3 times [2024-06-14 11:34:39,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:39,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536159230] [2024-06-14 11:34:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:39,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:39,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:39,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536159230] [2024-06-14 11:34:39,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536159230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:39,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:39,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:39,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044916425] [2024-06-14 11:34:39,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:39,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:39,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:39,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:39,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:39,884 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:39,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 313 transitions, 4172 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:39,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:39,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:39,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:41,301 INFO L124 PetriNetUnfolderBase]: 5610/9718 cut-off events. [2024-06-14 11:34:41,301 INFO L125 PetriNetUnfolderBase]: For 1081022/1081025 co-relation queries the response was YES. [2024-06-14 11:34:41,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65705 conditions, 9718 events. 5610/9718 cut-off events. For 1081022/1081025 co-relation queries the response was YES. Maximal size of possible extension queue 695. Compared 75472 event pairs, 2031 based on Foata normal form. 36/9747 useless extension candidates. Maximal degree in co-relation 65587. Up to 7570 conditions per place. [2024-06-14 11:34:41,425 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 220 selfloop transitions, 118 changer transitions 5/349 dead transitions. [2024-06-14 11:34:41,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 349 transitions, 5298 flow [2024-06-14 11:34:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:41,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 11:34:41,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.627177700348432 [2024-06-14 11:34:41,426 INFO L175 Difference]: Start difference. First operand has 235 places, 313 transitions, 4172 flow. Second operand 7 states and 180 transitions. [2024-06-14 11:34:41,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 349 transitions, 5298 flow [2024-06-14 11:34:43,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 349 transitions, 5059 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-14 11:34:43,565 INFO L231 Difference]: Finished difference. Result has 239 places, 313 transitions, 4191 flow [2024-06-14 11:34:43,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3933, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4191, PETRI_PLACES=239, PETRI_TRANSITIONS=313} [2024-06-14 11:34:43,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 11:34:43,566 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 313 transitions, 4191 flow [2024-06-14 11:34:43,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:43,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:43,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:43,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 11:34:43,566 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)] === [2024-06-14 11:34:43,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:43,567 INFO L85 PathProgramCache]: Analyzing trace with hash -919744032, now seen corresponding path program 4 times [2024-06-14 11:34:43,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:43,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936726154] [2024-06-14 11:34:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:43,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:43,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936726154] [2024-06-14 11:34:43,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936726154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:43,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:43,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:43,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105239519] [2024-06-14 11:34:43,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:43,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:43,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:43,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:43,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:43,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:43,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 313 transitions, 4191 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:43,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:43,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:43,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:45,108 INFO L124 PetriNetUnfolderBase]: 5718/9903 cut-off events. [2024-06-14 11:34:45,108 INFO L125 PetriNetUnfolderBase]: For 1124784/1124787 co-relation queries the response was YES. [2024-06-14 11:34:45,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66464 conditions, 9903 events. 5718/9903 cut-off events. For 1124784/1124787 co-relation queries the response was YES. Maximal size of possible extension queue 715. Compared 77408 event pairs, 2383 based on Foata normal form. 42/9938 useless extension candidates. Maximal degree in co-relation 66344. Up to 8572 conditions per place. [2024-06-14 11:34:45,229 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 225 selfloop transitions, 101 changer transitions 4/336 dead transitions. [2024-06-14 11:34:45,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 336 transitions, 5101 flow [2024-06-14 11:34:45,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:45,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 11:34:45,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 11:34:45,230 INFO L175 Difference]: Start difference. First operand has 239 places, 313 transitions, 4191 flow. Second operand 7 states and 166 transitions. [2024-06-14 11:34:45,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 336 transitions, 5101 flow [2024-06-14 11:34:47,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 336 transitions, 4885 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 11:34:47,154 INFO L231 Difference]: Finished difference. Result has 242 places, 313 transitions, 4186 flow [2024-06-14 11:34:47,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3976, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4186, PETRI_PLACES=242, PETRI_TRANSITIONS=313} [2024-06-14 11:34:47,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 11:34:47,154 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 313 transitions, 4186 flow [2024-06-14 11:34:47,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:47,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:47,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:47,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 11:34:47,155 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)] === [2024-06-14 11:34:47,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:47,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1727368356, now seen corresponding path program 5 times [2024-06-14 11:34:47,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:47,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402662680] [2024-06-14 11:34:47,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:47,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402662680] [2024-06-14 11:34:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402662680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:47,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458850403] [2024-06-14 11:34:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:47,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:47,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:47,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:47,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 313 transitions, 4186 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:47,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:47,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:47,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:48,701 INFO L124 PetriNetUnfolderBase]: 5824/10089 cut-off events. [2024-06-14 11:34:48,701 INFO L125 PetriNetUnfolderBase]: For 1152657/1152660 co-relation queries the response was YES. [2024-06-14 11:34:48,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67246 conditions, 10089 events. 5824/10089 cut-off events. For 1152657/1152660 co-relation queries the response was YES. Maximal size of possible extension queue 735. Compared 79099 event pairs, 2427 based on Foata normal form. 42/10124 useless extension candidates. Maximal degree in co-relation 67125. Up to 8758 conditions per place. [2024-06-14 11:34:48,818 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 105 changer transitions 5/339 dead transitions. [2024-06-14 11:34:48,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 339 transitions, 5115 flow [2024-06-14 11:34:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:48,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:48,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:34:48,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:34:48,820 INFO L175 Difference]: Start difference. First operand has 242 places, 313 transitions, 4186 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:34:48,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 339 transitions, 5115 flow [2024-06-14 11:34:50,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 339 transitions, 4904 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:50,825 INFO L231 Difference]: Finished difference. Result has 244 places, 312 transitions, 4186 flow [2024-06-14 11:34:50,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3975, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4186, PETRI_PLACES=244, PETRI_TRANSITIONS=312} [2024-06-14 11:34:50,826 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 202 predicate places. [2024-06-14 11:34:50,826 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 312 transitions, 4186 flow [2024-06-14 11:34:50,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:50,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:50,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:50,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 11:34:50,826 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)] === [2024-06-14 11:34:50,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:50,827 INFO L85 PathProgramCache]: Analyzing trace with hash -783137854, now seen corresponding path program 1 times [2024-06-14 11:34:50,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:50,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41715441] [2024-06-14 11:34:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:50,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:50,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:50,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:50,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:50,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41715441] [2024-06-14 11:34:50,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41715441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:50,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:50,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:50,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098935953] [2024-06-14 11:34:50,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:50,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:50,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:50,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:50,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:50,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:50,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 312 transitions, 4186 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:50,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:50,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:50,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:52,759 INFO L124 PetriNetUnfolderBase]: 5889/10222 cut-off events. [2024-06-14 11:34:52,760 INFO L125 PetriNetUnfolderBase]: For 1163273/1163276 co-relation queries the response was YES. [2024-06-14 11:34:52,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68034 conditions, 10222 events. 5889/10222 cut-off events. For 1163273/1163276 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 80514 event pairs, 2407 based on Foata normal form. 36/10251 useless extension candidates. Maximal degree in co-relation 67912. Up to 8248 conditions per place. [2024-06-14 11:34:52,857 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 104 changer transitions 7/341 dead transitions. [2024-06-14 11:34:52,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 341 transitions, 5167 flow [2024-06-14 11:34:52,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:34:52,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:34:52,858 INFO L175 Difference]: Start difference. First operand has 244 places, 312 transitions, 4186 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:34:52,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 341 transitions, 5167 flow [2024-06-14 11:34:54,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 341 transitions, 4948 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:54,788 INFO L231 Difference]: Finished difference. Result has 246 places, 312 transitions, 4215 flow [2024-06-14 11:34:54,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4215, PETRI_PLACES=246, PETRI_TRANSITIONS=312} [2024-06-14 11:34:54,788 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 11:34:54,788 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 312 transitions, 4215 flow [2024-06-14 11:34:54,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:54,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:54,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:54,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 11:34:54,789 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)] === [2024-06-14 11:34:54,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:54,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1454841012, now seen corresponding path program 6 times [2024-06-14 11:34:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:54,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696387234] [2024-06-14 11:34:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:54,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:54,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:54,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696387234] [2024-06-14 11:34:54,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696387234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:54,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:54,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:54,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025563873] [2024-06-14 11:34:54,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:54,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:54,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:54,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:54,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 312 transitions, 4215 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:54,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:54,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:54,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:34:56,989 INFO L124 PetriNetUnfolderBase]: 5720/9968 cut-off events. [2024-06-14 11:34:56,990 INFO L125 PetriNetUnfolderBase]: For 1068734/1068739 co-relation queries the response was YES. [2024-06-14 11:34:57,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64019 conditions, 9968 events. 5720/9968 cut-off events. For 1068734/1068739 co-relation queries the response was YES. Maximal size of possible extension queue 724. Compared 78373 event pairs, 2442 based on Foata normal form. 42/10005 useless extension candidates. Maximal degree in co-relation 63896. Up to 8609 conditions per place. [2024-06-14 11:34:57,086 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 82 changer transitions 4/330 dead transitions. [2024-06-14 11:34:57,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 330 transitions, 5077 flow [2024-06-14 11:34:57,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:34:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:34:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 11:34:57,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:34:57,088 INFO L175 Difference]: Start difference. First operand has 246 places, 312 transitions, 4215 flow. Second operand 7 states and 161 transitions. [2024-06-14 11:34:57,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 330 transitions, 5077 flow [2024-06-14 11:34:59,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 330 transitions, 4807 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 11:34:59,335 INFO L231 Difference]: Finished difference. Result has 248 places, 310 transitions, 4079 flow [2024-06-14 11:34:59,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3945, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4079, PETRI_PLACES=248, PETRI_TRANSITIONS=310} [2024-06-14 11:34:59,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 11:34:59,335 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 310 transitions, 4079 flow [2024-06-14 11:34:59,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:59,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:34:59,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:34:59,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 11:34:59,336 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)] === [2024-06-14 11:34:59,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:34:59,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2145428884, now seen corresponding path program 2 times [2024-06-14 11:34:59,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:34:59,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330283082] [2024-06-14 11:34:59,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:34:59,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:34:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:34:59,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:34:59,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:34:59,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330283082] [2024-06-14 11:34:59,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330283082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:34:59,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:34:59,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:34:59,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774235520] [2024-06-14 11:34:59,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:34:59,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:34:59,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:34:59,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:34:59,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:34:59,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:34:59,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 310 transitions, 4079 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:34:59,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:34:59,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:34:59,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:01,805 INFO L124 PetriNetUnfolderBase]: 5640/9862 cut-off events. [2024-06-14 11:35:01,805 INFO L125 PetriNetUnfolderBase]: For 1027840/1027845 co-relation queries the response was YES. [2024-06-14 11:35:01,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62403 conditions, 9862 events. 5640/9862 cut-off events. For 1027840/1027845 co-relation queries the response was YES. Maximal size of possible extension queue 711. Compared 77556 event pairs, 2372 based on Foata normal form. 36/9893 useless extension candidates. Maximal degree in co-relation 62279. Up to 8287 conditions per place. [2024-06-14 11:35:01,930 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 239 selfloop transitions, 82 changer transitions 9/336 dead transitions. [2024-06-14 11:35:01,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 336 transitions, 5050 flow [2024-06-14 11:35:01,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:01,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:01,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-14 11:35:01,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-14 11:35:01,931 INFO L175 Difference]: Start difference. First operand has 248 places, 310 transitions, 4079 flow. Second operand 7 states and 167 transitions. [2024-06-14 11:35:01,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 336 transitions, 5050 flow [2024-06-14 11:35:04,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 336 transitions, 4822 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 11:35:04,212 INFO L231 Difference]: Finished difference. Result has 248 places, 308 transitions, 4056 flow [2024-06-14 11:35:04,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3851, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4056, PETRI_PLACES=248, PETRI_TRANSITIONS=308} [2024-06-14 11:35:04,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 11:35:04,213 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 308 transitions, 4056 flow [2024-06-14 11:35:04,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:04,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:04,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:04,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 11:35:04,215 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)] === [2024-06-14 11:35:04,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:04,215 INFO L85 PathProgramCache]: Analyzing trace with hash -2142129102, now seen corresponding path program 3 times [2024-06-14 11:35:04,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:04,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125334226] [2024-06-14 11:35:04,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:04,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125334226] [2024-06-14 11:35:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125334226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:04,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839627357] [2024-06-14 11:35:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:04,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:04,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 308 transitions, 4056 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:04,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:04,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:04,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:06,186 INFO L124 PetriNetUnfolderBase]: 5664/9914 cut-off events. [2024-06-14 11:35:06,186 INFO L125 PetriNetUnfolderBase]: For 1122370/1122375 co-relation queries the response was YES. [2024-06-14 11:35:06,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64243 conditions, 9914 events. 5664/9914 cut-off events. For 1122370/1122375 co-relation queries the response was YES. Maximal size of possible extension queue 716. Compared 77752 event pairs, 2293 based on Foata normal form. 36/9945 useless extension candidates. Maximal degree in co-relation 64118. Up to 6591 conditions per place. [2024-06-14 11:35:06,312 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 235 selfloop transitions, 85 changer transitions 12/338 dead transitions. [2024-06-14 11:35:06,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 338 transitions, 5182 flow [2024-06-14 11:35:06,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:06,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:06,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 11:35:06,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 11:35:06,314 INFO L175 Difference]: Start difference. First operand has 248 places, 308 transitions, 4056 flow. Second operand 7 states and 170 transitions. [2024-06-14 11:35:06,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 338 transitions, 5182 flow [2024-06-14 11:35:09,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 338 transitions, 4955 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:09,325 INFO L231 Difference]: Finished difference. Result has 250 places, 303 transitions, 4007 flow [2024-06-14 11:35:09,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3829, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4007, PETRI_PLACES=250, PETRI_TRANSITIONS=303} [2024-06-14 11:35:09,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 11:35:09,326 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 303 transitions, 4007 flow [2024-06-14 11:35:09,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:09,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:09,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 11:35:09,327 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)] === [2024-06-14 11:35:09,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash 1047579085, now seen corresponding path program 1 times [2024-06-14 11:35:09,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:09,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923131389] [2024-06-14 11:35:09,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:09,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:09,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:09,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923131389] [2024-06-14 11:35:09,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923131389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:09,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:09,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:09,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176388464] [2024-06-14 11:35:09,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:09,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:09,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:09,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:09,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:09,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 303 transitions, 4007 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:09,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:09,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:09,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:11,556 INFO L124 PetriNetUnfolderBase]: 5474/9573 cut-off events. [2024-06-14 11:35:11,557 INFO L125 PetriNetUnfolderBase]: For 1022548/1022550 co-relation queries the response was YES. [2024-06-14 11:35:11,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62712 conditions, 9573 events. 5474/9573 cut-off events. For 1022548/1022550 co-relation queries the response was YES. Maximal size of possible extension queue 694. Compared 74693 event pairs, 1710 based on Foata normal form. 8/9509 useless extension candidates. Maximal degree in co-relation 62586. Up to 4891 conditions per place. [2024-06-14 11:35:11,702 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 115 changer transitions 0/348 dead transitions. [2024-06-14 11:35:11,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 348 transitions, 5432 flow [2024-06-14 11:35:11,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:11,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-14 11:35:11,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6445993031358885 [2024-06-14 11:35:11,704 INFO L175 Difference]: Start difference. First operand has 250 places, 303 transitions, 4007 flow. Second operand 7 states and 185 transitions. [2024-06-14 11:35:11,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 348 transitions, 5432 flow [2024-06-14 11:35:14,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 5125 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-14 11:35:14,461 INFO L231 Difference]: Finished difference. Result has 250 places, 305 transitions, 3975 flow [2024-06-14 11:35:14,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3700, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3975, PETRI_PLACES=250, PETRI_TRANSITIONS=305} [2024-06-14 11:35:14,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 11:35:14,463 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 305 transitions, 3975 flow [2024-06-14 11:35:14,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:14,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:14,463 INFO 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] [2024-06-14 11:35:14,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 11:35:14,463 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)] === [2024-06-14 11:35:14,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:14,464 INFO L85 PathProgramCache]: Analyzing trace with hash -144732493, now seen corresponding path program 2 times [2024-06-14 11:35:14,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:14,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648212607] [2024-06-14 11:35:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:14,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:14,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:14,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:14,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648212607] [2024-06-14 11:35:14,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648212607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:14,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:14,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:14,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800971585] [2024-06-14 11:35:14,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:14,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:14,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:14,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:14,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:14,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:14,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 305 transitions, 3975 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:14,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:14,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:14,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:16,294 INFO L124 PetriNetUnfolderBase]: 5342/9347 cut-off events. [2024-06-14 11:35:16,295 INFO L125 PetriNetUnfolderBase]: For 918611/918613 co-relation queries the response was YES. [2024-06-14 11:35:16,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59708 conditions, 9347 events. 5342/9347 cut-off events. For 918611/918613 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 72609 event pairs, 1699 based on Foata normal form. 2/9277 useless extension candidates. Maximal degree in co-relation 59583. Up to 4684 conditions per place. [2024-06-14 11:35:16,399 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 217 selfloop transitions, 120 changer transitions 0/343 dead transitions. [2024-06-14 11:35:16,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 343 transitions, 5394 flow [2024-06-14 11:35:16,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:16,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-14 11:35:16,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6202090592334495 [2024-06-14 11:35:16,401 INFO L175 Difference]: Start difference. First operand has 250 places, 305 transitions, 3975 flow. Second operand 7 states and 178 transitions. [2024-06-14 11:35:16,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 343 transitions, 5394 flow [2024-06-14 11:35:19,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 343 transitions, 5158 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 11:35:19,174 INFO L231 Difference]: Finished difference. Result has 253 places, 307 transitions, 4041 flow [2024-06-14 11:35:19,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4041, PETRI_PLACES=253, PETRI_TRANSITIONS=307} [2024-06-14 11:35:19,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 211 predicate places. [2024-06-14 11:35:19,175 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 307 transitions, 4041 flow [2024-06-14 11:35:19,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:19,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:19,175 INFO 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] [2024-06-14 11:35:19,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 11:35:19,176 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)] === [2024-06-14 11:35:19,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:19,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1057008465, now seen corresponding path program 3 times [2024-06-14 11:35:19,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:19,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204040006] [2024-06-14 11:35:19,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:19,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:19,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:19,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:19,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204040006] [2024-06-14 11:35:19,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204040006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:19,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:19,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:19,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651234863] [2024-06-14 11:35:19,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:19,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:19,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:19,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:19,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:19,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 307 transitions, 4041 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:19,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:19,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:19,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:21,182 INFO L124 PetriNetUnfolderBase]: 5285/9199 cut-off events. [2024-06-14 11:35:21,182 INFO L125 PetriNetUnfolderBase]: For 933662/933664 co-relation queries the response was YES. [2024-06-14 11:35:21,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58387 conditions, 9199 events. 5285/9199 cut-off events. For 933662/933664 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 71320 event pairs, 2008 based on Foata normal form. 12/9145 useless extension candidates. Maximal degree in co-relation 58261. Up to 7289 conditions per place. [2024-06-14 11:35:21,293 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 101 changer transitions 5/342 dead transitions. [2024-06-14 11:35:21,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 342 transitions, 5161 flow [2024-06-14 11:35:21,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:21,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 11:35:21,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 11:35:21,295 INFO L175 Difference]: Start difference. First operand has 253 places, 307 transitions, 4041 flow. Second operand 7 states and 182 transitions. [2024-06-14 11:35:21,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 342 transitions, 5161 flow [2024-06-14 11:35:24,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 342 transitions, 4912 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 11:35:24,038 INFO L231 Difference]: Finished difference. Result has 256 places, 304 transitions, 3959 flow [2024-06-14 11:35:24,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3959, PETRI_PLACES=256, PETRI_TRANSITIONS=304} [2024-06-14 11:35:24,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 11:35:24,039 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 304 transitions, 3959 flow [2024-06-14 11:35:24,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:24,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:24,040 INFO 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] [2024-06-14 11:35:24,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 11:35:24,040 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)] === [2024-06-14 11:35:24,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:24,040 INFO L85 PathProgramCache]: Analyzing trace with hash 690498123, now seen corresponding path program 4 times [2024-06-14 11:35:24,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:24,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312767211] [2024-06-14 11:35:24,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:24,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:24,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:24,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312767211] [2024-06-14 11:35:24,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312767211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:24,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:24,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:24,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075186142] [2024-06-14 11:35:24,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:24,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:24,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:24,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:24,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:24,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:24,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 304 transitions, 3959 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:24,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:24,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:24,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:25,732 INFO L124 PetriNetUnfolderBase]: 5075/8877 cut-off events. [2024-06-14 11:35:25,733 INFO L125 PetriNetUnfolderBase]: For 905493/905495 co-relation queries the response was YES. [2024-06-14 11:35:25,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55668 conditions, 8877 events. 5075/8877 cut-off events. For 905493/905495 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 68661 event pairs, 2086 based on Foata normal form. 12/8864 useless extension candidates. Maximal degree in co-relation 55542. Up to 7771 conditions per place. [2024-06-14 11:35:25,823 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 93 changer transitions 2/329 dead transitions. [2024-06-14 11:35:25,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 329 transitions, 4849 flow [2024-06-14 11:35:25,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:25,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:25,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 11:35:25,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 11:35:25,825 INFO L175 Difference]: Start difference. First operand has 256 places, 304 transitions, 3959 flow. Second operand 7 states and 173 transitions. [2024-06-14 11:35:25,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 329 transitions, 4849 flow [2024-06-14 11:35:27,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 329 transitions, 4637 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:35:27,861 INFO L231 Difference]: Finished difference. Result has 259 places, 304 transitions, 3940 flow [2024-06-14 11:35:27,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3747, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3940, PETRI_PLACES=259, PETRI_TRANSITIONS=304} [2024-06-14 11:35:27,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 11:35:27,862 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 304 transitions, 3940 flow [2024-06-14 11:35:27,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:27,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:27,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:27,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 11:35:27,863 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)] === [2024-06-14 11:35:27,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1819876917, now seen corresponding path program 5 times [2024-06-14 11:35:27,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:27,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624011325] [2024-06-14 11:35:27,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:27,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:27,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:27,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:27,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624011325] [2024-06-14 11:35:27,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624011325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:27,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:27,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:27,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275450140] [2024-06-14 11:35:27,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:27,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:27,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:27,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:27,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:27,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:27,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 304 transitions, 3940 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:27,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:27,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:27,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:29,561 INFO L124 PetriNetUnfolderBase]: 5070/8853 cut-off events. [2024-06-14 11:35:29,561 INFO L125 PetriNetUnfolderBase]: For 876066/876068 co-relation queries the response was YES. [2024-06-14 11:35:29,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55406 conditions, 8853 events. 5070/8853 cut-off events. For 876066/876068 co-relation queries the response was YES. Maximal size of possible extension queue 643. Compared 68258 event pairs, 2056 based on Foata normal form. 2/8813 useless extension candidates. Maximal degree in co-relation 55279. Up to 7645 conditions per place. [2024-06-14 11:35:29,653 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 220 selfloop transitions, 101 changer transitions 1/328 dead transitions. [2024-06-14 11:35:29,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 328 transitions, 5004 flow [2024-06-14 11:35:29,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:35:29,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 11:35:29,654 INFO L175 Difference]: Start difference. First operand has 259 places, 304 transitions, 3940 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:35:29,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 328 transitions, 5004 flow [2024-06-14 11:35:31,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 328 transitions, 4795 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:31,695 INFO L231 Difference]: Finished difference. Result has 261 places, 304 transitions, 3939 flow [2024-06-14 11:35:31,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3731, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3939, PETRI_PLACES=261, PETRI_TRANSITIONS=304} [2024-06-14 11:35:31,696 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 11:35:31,696 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 304 transitions, 3939 flow [2024-06-14 11:35:31,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:31,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:31,696 INFO 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] [2024-06-14 11:35:31,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 11:35:31,696 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)] === [2024-06-14 11:35:31,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:31,697 INFO L85 PathProgramCache]: Analyzing trace with hash 143224337, now seen corresponding path program 6 times [2024-06-14 11:35:31,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:31,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750868941] [2024-06-14 11:35:31,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:31,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:31,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750868941] [2024-06-14 11:35:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750868941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:31,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:31,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:31,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818686300] [2024-06-14 11:35:31,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:31,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:31,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:31,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:31,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 304 transitions, 3939 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:31,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:31,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:31,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:33,335 INFO L124 PetriNetUnfolderBase]: 5065/8883 cut-off events. [2024-06-14 11:35:33,335 INFO L125 PetriNetUnfolderBase]: For 885695/885697 co-relation queries the response was YES. [2024-06-14 11:35:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55315 conditions, 8883 events. 5065/8883 cut-off events. For 885695/885697 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 68930 event pairs, 2100 based on Foata normal form. 2/8866 useless extension candidates. Maximal degree in co-relation 55187. Up to 7795 conditions per place. [2024-06-14 11:35:33,432 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 93 changer transitions 0/323 dead transitions. [2024-06-14 11:35:33,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 323 transitions, 4799 flow [2024-06-14 11:35:33,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:35:33,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:35:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 11:35:33,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 11:35:33,434 INFO L175 Difference]: Start difference. First operand has 261 places, 304 transitions, 3939 flow. Second operand 7 states and 164 transitions. [2024-06-14 11:35:33,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 323 transitions, 4799 flow [2024-06-14 11:35:35,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 323 transitions, 4532 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:35,495 INFO L231 Difference]: Finished difference. Result has 263 places, 304 transitions, 3863 flow [2024-06-14 11:35:35,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3672, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3863, PETRI_PLACES=263, PETRI_TRANSITIONS=304} [2024-06-14 11:35:35,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-14 11:35:35,496 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 304 transitions, 3863 flow [2024-06-14 11:35:35,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:35,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:35,496 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, 1] [2024-06-14 11:35:35,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 11:35:35,497 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)] === [2024-06-14 11:35:35,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:35,500 INFO L85 PathProgramCache]: Analyzing trace with hash -335807490, now seen corresponding path program 1 times [2024-06-14 11:35:35,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:35,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962661252] [2024-06-14 11:35:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:35,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:35,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:35,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:35,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962661252] [2024-06-14 11:35:35,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962661252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:35,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:35,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:35,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746353553] [2024-06-14 11:35:35,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:35,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:35,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:35,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:35,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:35,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:35,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 304 transitions, 3863 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:35,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:35,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:35,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:37,299 INFO L124 PetriNetUnfolderBase]: 5078/8925 cut-off events. [2024-06-14 11:35:37,299 INFO L125 PetriNetUnfolderBase]: For 902809/902816 co-relation queries the response was YES. [2024-06-14 11:35:37,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55545 conditions, 8925 events. 5078/8925 cut-off events. For 902809/902816 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 69371 event pairs, 2157 based on Foata normal form. 5/8926 useless extension candidates. Maximal degree in co-relation 55416. Up to 7816 conditions per place. [2024-06-14 11:35:37,399 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 236 selfloop transitions, 86 changer transitions 0/328 dead transitions. [2024-06-14 11:35:37,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 328 transitions, 5017 flow [2024-06-14 11:35:37,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:37,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:35:37,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:35:37,401 INFO L175 Difference]: Start difference. First operand has 263 places, 304 transitions, 3863 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:35:37,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 328 transitions, 5017 flow [2024-06-14 11:35:39,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 328 transitions, 4796 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 11:35:39,157 INFO L231 Difference]: Finished difference. Result has 264 places, 310 transitions, 3923 flow [2024-06-14 11:35:39,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3654, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3923, PETRI_PLACES=264, PETRI_TRANSITIONS=310} [2024-06-14 11:35:39,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 222 predicate places. [2024-06-14 11:35:39,158 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 310 transitions, 3923 flow [2024-06-14 11:35:39,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:39,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:39,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:39,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 11:35:39,158 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)] === [2024-06-14 11:35:39,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:39,159 INFO L85 PathProgramCache]: Analyzing trace with hash -249296760, now seen corresponding path program 2 times [2024-06-14 11:35:39,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:39,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152436972] [2024-06-14 11:35:39,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:39,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:39,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:39,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152436972] [2024-06-14 11:35:39,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152436972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:39,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:39,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:39,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147186859] [2024-06-14 11:35:39,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:39,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:39,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:39,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:39,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:39,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:39,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 310 transitions, 3923 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:39,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:39,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:39,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:40,788 INFO L124 PetriNetUnfolderBase]: 5091/8943 cut-off events. [2024-06-14 11:35:40,788 INFO L125 PetriNetUnfolderBase]: For 927808/927815 co-relation queries the response was YES. [2024-06-14 11:35:40,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55983 conditions, 8943 events. 5091/8943 cut-off events. For 927808/927815 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 69482 event pairs, 2153 based on Foata normal form. 5/8944 useless extension candidates. Maximal degree in co-relation 55853. Up to 7831 conditions per place. [2024-06-14 11:35:40,878 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 237 selfloop transitions, 91 changer transitions 0/334 dead transitions. [2024-06-14 11:35:40,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 334 transitions, 5093 flow [2024-06-14 11:35:40,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:35:40,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:35:40,879 INFO L175 Difference]: Start difference. First operand has 264 places, 310 transitions, 3923 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:35:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 334 transitions, 5093 flow [2024-06-14 11:35:42,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 334 transitions, 4981 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:35:42,722 INFO L231 Difference]: Finished difference. Result has 268 places, 316 transitions, 4101 flow [2024-06-14 11:35:42,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3817, PETRI_DIFFERENCE_MINUEND_PLACES=262, 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=6, PETRI_FLOW=4101, PETRI_PLACES=268, PETRI_TRANSITIONS=316} [2024-06-14 11:35:42,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 11:35:42,722 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 316 transitions, 4101 flow [2024-06-14 11:35:42,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:42,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:42,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:35:42,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 11:35:42,723 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)] === [2024-06-14 11:35:42,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:42,723 INFO L85 PathProgramCache]: Analyzing trace with hash 924343710, now seen corresponding path program 3 times [2024-06-14 11:35:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477073137] [2024-06-14 11:35:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:42,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:42,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477073137] [2024-06-14 11:35:42,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477073137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:42,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:42,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:42,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201162251] [2024-06-14 11:35:42,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:42,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:42,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:42,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:42,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:42,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:42,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 316 transitions, 4101 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:42,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:42,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:42,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:44,281 INFO L124 PetriNetUnfolderBase]: 5088/8936 cut-off events. [2024-06-14 11:35:44,281 INFO L125 PetriNetUnfolderBase]: For 943504/943509 co-relation queries the response was YES. [2024-06-14 11:35:44,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56167 conditions, 8936 events. 5088/8936 cut-off events. For 943504/943509 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 69413 event pairs, 2147 based on Foata normal form. 3/8935 useless extension candidates. Maximal degree in co-relation 56036. Up to 7828 conditions per place. [2024-06-14 11:35:44,382 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 233 selfloop transitions, 92 changer transitions 3/334 dead transitions. [2024-06-14 11:35:44,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 334 transitions, 5173 flow [2024-06-14 11:35:44,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:44,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 11:35:44,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 11:35:44,384 INFO L175 Difference]: Start difference. First operand has 268 places, 316 transitions, 4101 flow. Second operand 6 states and 144 transitions. [2024-06-14 11:35:44,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 334 transitions, 5173 flow [2024-06-14 11:35:46,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 334 transitions, 5061 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:35:46,279 INFO L231 Difference]: Finished difference. Result has 272 places, 316 transitions, 4180 flow [2024-06-14 11:35:46,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4180, PETRI_PLACES=272, PETRI_TRANSITIONS=316} [2024-06-14 11:35:46,280 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 11:35:46,280 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 316 transitions, 4180 flow [2024-06-14 11:35:46,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:46,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:46,280 INFO 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] [2024-06-14 11:35:46,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 11:35:46,281 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)] === [2024-06-14 11:35:46,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:46,281 INFO L85 PathProgramCache]: Analyzing trace with hash 924527850, now seen corresponding path program 4 times [2024-06-14 11:35:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:46,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818229024] [2024-06-14 11:35:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:46,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:46,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:46,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:46,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818229024] [2024-06-14 11:35:46,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818229024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:46,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:46,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:46,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924183089] [2024-06-14 11:35:46,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:46,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:46,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:46,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:46,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:46,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:46,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 316 transitions, 4180 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:46,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:46,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:46,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:47,887 INFO L124 PetriNetUnfolderBase]: 5093/8944 cut-off events. [2024-06-14 11:35:47,888 INFO L125 PetriNetUnfolderBase]: For 963720/963725 co-relation queries the response was YES. [2024-06-14 11:35:47,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56575 conditions, 8944 events. 5093/8944 cut-off events. For 963720/963725 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 69444 event pairs, 2168 based on Foata normal form. 1/8940 useless extension candidates. Maximal degree in co-relation 56443. Up to 7834 conditions per place. [2024-06-14 11:35:47,978 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 230 selfloop transitions, 95 changer transitions 0/331 dead transitions. [2024-06-14 11:35:47,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 331 transitions, 5291 flow [2024-06-14 11:35:47,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:47,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:47,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 11:35:47,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 11:35:47,980 INFO L175 Difference]: Start difference. First operand has 272 places, 316 transitions, 4180 flow. Second operand 6 states and 138 transitions. [2024-06-14 11:35:47,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 331 transitions, 5291 flow [2024-06-14 11:35:50,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 331 transitions, 4994 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 11:35:50,066 INFO L231 Difference]: Finished difference. Result has 272 places, 319 transitions, 4137 flow [2024-06-14 11:35:50,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3892, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4137, PETRI_PLACES=272, PETRI_TRANSITIONS=319} [2024-06-14 11:35:50,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 11:35:50,069 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 319 transitions, 4137 flow [2024-06-14 11:35:50,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:50,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:50,070 INFO 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] [2024-06-14 11:35:50,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 11:35:50,070 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)] === [2024-06-14 11:35:50,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:50,070 INFO L85 PathProgramCache]: Analyzing trace with hash 924522270, now seen corresponding path program 5 times [2024-06-14 11:35:50,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:50,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019824344] [2024-06-14 11:35:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:50,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:50,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:50,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:50,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019824344] [2024-06-14 11:35:50,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019824344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:50,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:50,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:50,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490961069] [2024-06-14 11:35:50,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:50,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:50,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:50,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:50,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:50,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:50,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 319 transitions, 4137 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:50,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:50,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:50,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:52,105 INFO L124 PetriNetUnfolderBase]: 5090/8944 cut-off events. [2024-06-14 11:35:52,106 INFO L125 PetriNetUnfolderBase]: For 976607/976612 co-relation queries the response was YES. [2024-06-14 11:35:52,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56468 conditions, 8944 events. 5090/8944 cut-off events. For 976607/976612 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 69422 event pairs, 2172 based on Foata normal form. 1/8940 useless extension candidates. Maximal degree in co-relation 56335. Up to 7831 conditions per place. [2024-06-14 11:35:52,243 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 230 selfloop transitions, 94 changer transitions 0/330 dead transitions. [2024-06-14 11:35:52,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 330 transitions, 5001 flow [2024-06-14 11:35:52,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 11:35:52,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 11:35:52,244 INFO L175 Difference]: Start difference. First operand has 272 places, 319 transitions, 4137 flow. Second operand 6 states and 137 transitions. [2024-06-14 11:35:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 330 transitions, 5001 flow [2024-06-14 11:35:54,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 330 transitions, 4886 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-14 11:35:54,664 INFO L231 Difference]: Finished difference. Result has 276 places, 319 transitions, 4216 flow [2024-06-14 11:35:54,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4022, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4216, PETRI_PLACES=276, PETRI_TRANSITIONS=319} [2024-06-14 11:35:54,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-14 11:35:54,665 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 319 transitions, 4216 flow [2024-06-14 11:35:54,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:54,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:54,665 INFO 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] [2024-06-14 11:35:54,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 11:35:54,666 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)] === [2024-06-14 11:35:54,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:54,666 INFO L85 PathProgramCache]: Analyzing trace with hash 924354870, now seen corresponding path program 6 times [2024-06-14 11:35:54,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:54,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368204152] [2024-06-14 11:35:54,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:54,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:54,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:54,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368204152] [2024-06-14 11:35:54,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368204152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:54,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:54,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:35:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342090337] [2024-06-14 11:35:54,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:54,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:35:54,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:54,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:35:54,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:35:54,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:54,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 319 transitions, 4216 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:54,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:54,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:54,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:35:56,262 INFO L124 PetriNetUnfolderBase]: 5087/8941 cut-off events. [2024-06-14 11:35:56,262 INFO L125 PetriNetUnfolderBase]: For 992291/992296 co-relation queries the response was YES. [2024-06-14 11:35:56,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56630 conditions, 8941 events. 5087/8941 cut-off events. For 992291/992296 co-relation queries the response was YES. Maximal size of possible extension queue 644. Compared 69420 event pairs, 2151 based on Foata normal form. 3/8940 useless extension candidates. Maximal degree in co-relation 56496. Up to 7828 conditions per place. [2024-06-14 11:35:56,359 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 232 selfloop transitions, 94 changer transitions 0/332 dead transitions. [2024-06-14 11:35:56,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 332 transitions, 4900 flow [2024-06-14 11:35:56,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:35:56,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:35:56,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 11:35:56,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5650406504065041 [2024-06-14 11:35:56,360 INFO L175 Difference]: Start difference. First operand has 276 places, 319 transitions, 4216 flow. Second operand 6 states and 139 transitions. [2024-06-14 11:35:56,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 332 transitions, 4900 flow [2024-06-14 11:35:59,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 332 transitions, 4588 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 11:35:59,459 INFO L231 Difference]: Finished difference. Result has 275 places, 319 transitions, 4098 flow [2024-06-14 11:35:59,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4098, PETRI_PLACES=275, PETRI_TRANSITIONS=319} [2024-06-14 11:35:59,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 233 predicate places. [2024-06-14 11:35:59,462 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 319 transitions, 4098 flow [2024-06-14 11:35:59,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:59,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:35:59,463 INFO 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] [2024-06-14 11:35:59,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 11:35:59,464 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)] === [2024-06-14 11:35:59,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:35:59,464 INFO L85 PathProgramCache]: Analyzing trace with hash -940182647, now seen corresponding path program 7 times [2024-06-14 11:35:59,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:35:59,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886596489] [2024-06-14 11:35:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:35:59,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:35:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:35:59,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:35:59,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:35:59,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886596489] [2024-06-14 11:35:59,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886596489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:35:59,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:35:59,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:35:59,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060715585] [2024-06-14 11:35:59,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:35:59,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:35:59,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:35:59,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:35:59,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:35:59,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:35:59,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 319 transitions, 4098 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:35:59,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:35:59,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:35:59,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:01,296 INFO L124 PetriNetUnfolderBase]: 5023/8787 cut-off events. [2024-06-14 11:36:01,297 INFO L125 PetriNetUnfolderBase]: For 1007618/1007623 co-relation queries the response was YES. [2024-06-14 11:36:01,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55012 conditions, 8787 events. 5023/8787 cut-off events. For 1007618/1007623 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 67788 event pairs, 2091 based on Foata normal form. 12/8781 useless extension candidates. Maximal degree in co-relation 54877. Up to 7672 conditions per place. [2024-06-14 11:36:01,390 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 218 selfloop transitions, 108 changer transitions 2/334 dead transitions. [2024-06-14 11:36:01,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 334 transitions, 4794 flow [2024-06-14 11:36:01,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:01,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:01,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:36:01,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:36:01,391 INFO L175 Difference]: Start difference. First operand has 275 places, 319 transitions, 4098 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:36:01,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 334 transitions, 4794 flow [2024-06-14 11:36:04,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 334 transitions, 4450 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 11:36:04,315 INFO L231 Difference]: Finished difference. Result has 274 places, 319 transitions, 3977 flow [2024-06-14 11:36:04,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3977, PETRI_PLACES=274, PETRI_TRANSITIONS=319} [2024-06-14 11:36:04,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-14 11:36:04,316 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 319 transitions, 3977 flow [2024-06-14 11:36:04,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:04,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:04,316 INFO 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] [2024-06-14 11:36:04,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 11:36:04,317 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)] === [2024-06-14 11:36:04,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:04,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1188823505, now seen corresponding path program 8 times [2024-06-14 11:36:04,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:04,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738168935] [2024-06-14 11:36:04,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:04,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:04,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:04,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:04,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738168935] [2024-06-14 11:36:04,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738168935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:04,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:04,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:04,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381439699] [2024-06-14 11:36:04,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:04,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:04,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:04,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:04,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:04,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 319 transitions, 3977 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:04,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:04,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:04,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:05,995 INFO L124 PetriNetUnfolderBase]: 4959/8629 cut-off events. [2024-06-14 11:36:05,995 INFO L125 PetriNetUnfolderBase]: For 968601/968606 co-relation queries the response was YES. [2024-06-14 11:36:06,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53396 conditions, 8629 events. 4959/8629 cut-off events. For 968601/968606 co-relation queries the response was YES. Maximal size of possible extension queue 626. Compared 65741 event pairs, 1989 based on Foata normal form. 12/8619 useless extension candidates. Maximal degree in co-relation 53260. Up to 6897 conditions per place. [2024-06-14 11:36:06,086 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 215 selfloop transitions, 115 changer transitions 5/341 dead transitions. [2024-06-14 11:36:06,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 341 transitions, 4907 flow [2024-06-14 11:36:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:06,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:06,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 11:36:06,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 11:36:06,088 INFO L175 Difference]: Start difference. First operand has 274 places, 319 transitions, 3977 flow. Second operand 7 states and 169 transitions. [2024-06-14 11:36:06,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 341 transitions, 4907 flow [2024-06-14 11:36:08,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 341 transitions, 4631 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 11:36:08,711 INFO L231 Difference]: Finished difference. Result has 274 places, 316 transitions, 3903 flow [2024-06-14 11:36:08,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3701, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3903, PETRI_PLACES=274, PETRI_TRANSITIONS=316} [2024-06-14 11:36:08,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-14 11:36:08,712 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 316 transitions, 3903 flow [2024-06-14 11:36:08,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:08,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:08,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:36:08,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 11:36:08,712 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)] === [2024-06-14 11:36:08,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1998174935, now seen corresponding path program 1 times [2024-06-14 11:36:08,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:08,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794903343] [2024-06-14 11:36:08,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:08,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:08,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:08,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794903343] [2024-06-14 11:36:08,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794903343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:08,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:08,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:08,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404659283] [2024-06-14 11:36:08,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:08,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:08,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:08,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:08,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:08,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:08,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 316 transitions, 3903 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:08,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:08,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:08,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:10,668 INFO L124 PetriNetUnfolderBase]: 4840/8446 cut-off events. [2024-06-14 11:36:10,668 INFO L125 PetriNetUnfolderBase]: For 928693/928696 co-relation queries the response was YES. [2024-06-14 11:36:10,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52631 conditions, 8446 events. 4840/8446 cut-off events. For 928693/928696 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 64337 event pairs, 1955 based on Foata normal form. 2/8440 useless extension candidates. Maximal degree in co-relation 52494. Up to 7210 conditions per place. [2024-06-14 11:36:10,768 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 223 selfloop transitions, 115 changer transitions 0/344 dead transitions. [2024-06-14 11:36:10,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 344 transitions, 4921 flow [2024-06-14 11:36:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 11:36:10,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 11:36:10,769 INFO L175 Difference]: Start difference. First operand has 274 places, 316 transitions, 3903 flow. Second operand 7 states and 171 transitions. [2024-06-14 11:36:10,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 344 transitions, 4921 flow [2024-06-14 11:36:13,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 344 transitions, 4675 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 11:36:13,221 INFO L231 Difference]: Finished difference. Result has 276 places, 318 transitions, 3991 flow [2024-06-14 11:36:13,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3657, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3991, PETRI_PLACES=276, PETRI_TRANSITIONS=318} [2024-06-14 11:36:13,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-14 11:36:13,222 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 318 transitions, 3991 flow [2024-06-14 11:36:13,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:13,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:13,222 INFO 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] [2024-06-14 11:36:13,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 11:36:13,222 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)] === [2024-06-14 11:36:13,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:13,223 INFO L85 PathProgramCache]: Analyzing trace with hash 477760169, now seen corresponding path program 2 times [2024-06-14 11:36:13,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:13,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987435281] [2024-06-14 11:36:13,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:13,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:13,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:13,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987435281] [2024-06-14 11:36:13,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987435281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:13,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:13,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:13,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766015673] [2024-06-14 11:36:13,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:13,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:13,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:13,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:13,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:13,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:13,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 318 transitions, 3991 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:13,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:13,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:13,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:14,928 INFO L124 PetriNetUnfolderBase]: 4835/8469 cut-off events. [2024-06-14 11:36:14,929 INFO L125 PetriNetUnfolderBase]: For 936530/936533 co-relation queries the response was YES. [2024-06-14 11:36:15,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52649 conditions, 8469 events. 4835/8469 cut-off events. For 936530/936533 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 64822 event pairs, 2016 based on Foata normal form. 2/8464 useless extension candidates. Maximal degree in co-relation 52510. Up to 7410 conditions per place. [2024-06-14 11:36:15,026 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 223 selfloop transitions, 107 changer transitions 0/336 dead transitions. [2024-06-14 11:36:15,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 336 transitions, 4695 flow [2024-06-14 11:36:15,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:15,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 11:36:15,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 11:36:15,027 INFO L175 Difference]: Start difference. First operand has 276 places, 318 transitions, 3991 flow. Second operand 7 states and 163 transitions. [2024-06-14 11:36:15,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 336 transitions, 4695 flow [2024-06-14 11:36:18,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 336 transitions, 4427 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-14 11:36:18,230 INFO L231 Difference]: Finished difference. Result has 279 places, 318 transitions, 3942 flow [2024-06-14 11:36:18,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3723, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3942, PETRI_PLACES=279, PETRI_TRANSITIONS=318} [2024-06-14 11:36:18,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 11:36:18,231 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 318 transitions, 3942 flow [2024-06-14 11:36:18,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:18,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:18,231 INFO 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] [2024-06-14 11:36:18,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 11:36:18,232 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)] === [2024-06-14 11:36:18,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash -500754887, now seen corresponding path program 3 times [2024-06-14 11:36:18,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:18,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946308576] [2024-06-14 11:36:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:18,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:18,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:18,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946308576] [2024-06-14 11:36:18,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946308576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:18,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:18,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:18,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966116936] [2024-06-14 11:36:18,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:18,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:18,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:18,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 318 transitions, 3942 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:18,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:18,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:18,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:19,886 INFO L124 PetriNetUnfolderBase]: 4843/8430 cut-off events. [2024-06-14 11:36:19,886 INFO L125 PetriNetUnfolderBase]: For 953852/953855 co-relation queries the response was YES. [2024-06-14 11:36:19,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52647 conditions, 8430 events. 4843/8430 cut-off events. For 953852/953855 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 63595 event pairs, 1629 based on Foata normal form. 2/8425 useless extension candidates. Maximal degree in co-relation 52507. Up to 4681 conditions per place. [2024-06-14 11:36:19,983 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 215 selfloop transitions, 133 changer transitions 1/355 dead transitions. [2024-06-14 11:36:19,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 355 transitions, 5248 flow [2024-06-14 11:36:19,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:19,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 11:36:19,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-14 11:36:19,984 INFO L175 Difference]: Start difference. First operand has 279 places, 318 transitions, 3942 flow. Second operand 7 states and 177 transitions. [2024-06-14 11:36:19,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 355 transitions, 5248 flow [2024-06-14 11:36:23,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 355 transitions, 4993 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 11:36:23,319 INFO L231 Difference]: Finished difference. Result has 281 places, 320 transitions, 4015 flow [2024-06-14 11:36:23,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4015, PETRI_PLACES=281, PETRI_TRANSITIONS=320} [2024-06-14 11:36:23,319 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 11:36:23,320 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 320 transitions, 4015 flow [2024-06-14 11:36:23,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:23,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:36:23,320 INFO 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] [2024-06-14 11:36:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 11:36:23,320 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)] === [2024-06-14 11:36:23,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:36:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -489327047, now seen corresponding path program 4 times [2024-06-14 11:36:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:36:23,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976123411] [2024-06-14 11:36:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:36:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:36:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:36:23,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:36:23,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:36:23,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976123411] [2024-06-14 11:36:23,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976123411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:36:23,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:36:23,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:36:23,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759754824] [2024-06-14 11:36:23,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:36:23,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:36:23,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:36:23,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:36:23,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:36:23,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 11:36:23,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 320 transitions, 4015 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:36:23,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:36:23,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 11:36:23,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:36:24,939 INFO L124 PetriNetUnfolderBase]: 4818/8385 cut-off events. [2024-06-14 11:36:24,940 INFO L125 PetriNetUnfolderBase]: For 963649/963652 co-relation queries the response was YES. [2024-06-14 11:36:25,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52140 conditions, 8385 events. 4818/8385 cut-off events. For 963649/963652 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 63167 event pairs, 1591 based on Foata normal form. 8/8386 useless extension candidates. Maximal degree in co-relation 51999. Up to 4667 conditions per place. [2024-06-14 11:36:25,037 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 217 selfloop transitions, 129 changer transitions 2/354 dead transitions. [2024-06-14 11:36:25,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 354 transitions, 5060 flow [2024-06-14 11:36:25,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:36:25,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:36:25,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 11:36:25,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 11:36:25,039 INFO L175 Difference]: Start difference. First operand has 281 places, 320 transitions, 4015 flow. Second operand 7 states and 176 transitions. [2024-06-14 11:36:25,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 354 transitions, 5060 flow