./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/safe032_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i ./goblint.2024-06-19_11-23-25.files/protection/safe032_tso.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 15:57:37,588 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 15:57:37,662 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 15:57:37,667 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 15:57:37,667 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 15:57:37,684 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 15:57:37,685 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 15:57:37,685 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 15:57:37,685 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 15:57:37,686 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 15:57:37,686 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 15:57:37,686 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 15:57:37,686 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 15:57:37,687 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 15:57:37,687 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 15:57:37,687 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 15:57:37,687 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 15:57:37,688 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 15:57:37,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 15:57:37,692 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 15:57:37,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 15:57:37,705 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 15:57:37,705 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 15:57:37,705 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 15:57:37,705 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 15:57:37,705 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 15:57:37,706 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 15:57:37,706 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 15:57:37,706 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 15:57:37,707 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 15:57:37,707 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 15:57:37,708 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 15:57:37,708 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:57:37,708 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 15:57:37,708 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 15:57:37,708 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 15:57:37,709 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 15:57:37,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 15:57:37,710 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 15:57:37,710 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 15:57:37,710 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 15:57:37,710 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 15:57:37,711 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 15:57:37,711 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 15:57:37,938 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 15:57:37,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 15:57:37,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 15:57:37,958 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 15:57:37,959 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 15:57:37,959 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/safe032_tso.yml/witness.yml [2024-06-21 15:57:38,072 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 15:57:38,072 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 15:57:38,073 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-21 15:57:38,943 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 15:57:39,128 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 15:57:39,129 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe032_tso.i [2024-06-21 15:57:39,146 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67899e846/a27c5e295bbe4006a0dfd82db6833807/FLAG0151095ff [2024-06-21 15:57:39,154 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67899e846/a27c5e295bbe4006a0dfd82db6833807 [2024-06-21 15:57:39,155 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 15:57:39,156 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 15:57:39,156 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 15:57:39,157 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 15:57:39,167 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 15:57:39,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:57:38" (1/2) ... [2024-06-21 15:57:39,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f001aad and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:57:39, skipping insertion in model container [2024-06-21 15:57:39,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:57:38" (1/2) ... [2024-06-21 15:57:39,169 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@519cc26d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 03:57:39, skipping insertion in model container [2024-06-21 15:57:39,170 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:57:39" (2/2) ... [2024-06-21 15:57:39,170 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f001aad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39, skipping insertion in model container [2024-06-21 15:57:39,170 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 03:57:39" (2/2) ... [2024-06-21 15:57:39,171 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 15:57:39,199 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 15:57:39,200 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 15:57:39,200 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 15:57:39,200 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((! multithreaded || ((y == 0 || y == 1) || y == 2)) && (! multithreaded || ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2)) [2024-06-21 15:57:39,200 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 15:57:39,201 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-21 15:57:39,227 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 15:57:39,469 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:57:39,475 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 15:57:39,546 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 15:57:39,574 INFO L206 MainTranslator]: Completed translation [2024-06-21 15:57:39,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39 WrapperNode [2024-06-21 15:57:39,575 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 15:57:39,576 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 15:57:39,576 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 15:57:39,576 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 15:57:39,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,600 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,616 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 15:57:39,616 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 15:57:39,617 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 15:57:39,617 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 15:57:39,617 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 15:57:39,624 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,624 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,626 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,635 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 15:57:39,635 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,635 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,639 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,640 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,641 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,642 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,644 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 15:57:39,644 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 15:57:39,645 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 15:57:39,645 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 15:57:39,645 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (1/1) ... [2024-06-21 15:57:39,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 15:57:39,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 15:57:39,671 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 15:57:39,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 15:57:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 15:57:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 15:57:39,696 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 15:57:39,696 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 15:57:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 15:57:39,697 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 15:57:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 15:57:39,697 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 15:57:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 15:57:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 15:57:39,697 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 15:57:39,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 15:57:39,698 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 15:57:39,791 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 15:57:39,793 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 15:57:39,943 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 15:57:39,943 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 15:57:40,010 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 15:57:40,011 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 15:57:40,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:57:40 BoogieIcfgContainer [2024-06-21 15:57:40,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 15:57:40,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 15:57:40,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 15:57:40,015 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 15:57:40,015 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 03:57:38" (1/4) ... [2024-06-21 15:57:40,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7831cd and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 03:57:40, skipping insertion in model container [2024-06-21 15:57:40,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 03:57:39" (2/4) ... [2024-06-21 15:57:40,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7831cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:57:40, skipping insertion in model container [2024-06-21 15:57:40,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 03:57:39" (3/4) ... [2024-06-21 15:57:40,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a7831cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 03:57:40, skipping insertion in model container [2024-06-21 15:57:40,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 03:57:40" (4/4) ... [2024-06-21 15:57:40,018 INFO L112 eAbstractionObserver]: Analyzing ICFG safe032_tso.i [2024-06-21 15:57:40,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 15:57:40,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 15:57:40,031 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 15:57:40,060 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 15:57:40,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 15:57:40,105 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 15:57:40,105 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:57:40,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 72 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 15:57:40,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 15:57:40,114 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 15:57:40,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 15:57:40,126 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;@51228339, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 15:57:40,126 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 15:57:40,129 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 15:57:40,129 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 15:57:40,129 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 15:57:40,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:40,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 15:57:40,130 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:40,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:40,134 INFO L85 PathProgramCache]: Analyzing trace with hash 219070604, now seen corresponding path program 1 times [2024-06-21 15:57:40,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:40,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606146473] [2024-06-21 15:57:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:40,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:40,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:40,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:40,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606146473] [2024-06-21 15:57:40,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606146473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:40,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:40,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 15:57:40,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993684310] [2024-06-21 15:57:40,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:40,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 15:57:40,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:40,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 15:57:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 15:57:40,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-21 15:57:40,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:40,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:40,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-21 15:57:40,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:40,654 INFO L124 PetriNetUnfolderBase]: 575/990 cut-off events. [2024-06-21 15:57:40,654 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-06-21 15:57:40,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 990 events. 575/990 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 5172 event pairs, 361 based on Foata normal form. 1/922 useless extension candidates. Maximal degree in co-relation 1918. Up to 885 conditions per place. [2024-06-21 15:57:40,666 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 28 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 15:57:40,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 165 flow [2024-06-21 15:57:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 15:57:40,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 15:57:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 89 transitions. [2024-06-21 15:57:40,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7063492063492064 [2024-06-21 15:57:40,677 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 89 transitions. [2024-06-21 15:57:40,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 165 flow [2024-06-21 15:57:40,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:40,682 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 15:57:40,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 15:57:40,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 15:57:40,687 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 15:57:40,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:40,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:40,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:40,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 15:57:40,687 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:40,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:40,690 INFO L85 PathProgramCache]: Analyzing trace with hash 73488363, now seen corresponding path program 1 times [2024-06-21 15:57:40,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:40,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707652403] [2024-06-21 15:57:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:40,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:40,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:40,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:40,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707652403] [2024-06-21 15:57:40,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707652403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:40,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:40,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:57:40,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831404837] [2024-06-21 15:57:40,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:40,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:57:40,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:40,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:57:40,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:57:40,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 42 [2024-06-21 15:57:40,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:40,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:40,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 42 [2024-06-21 15:57:40,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:41,051 INFO L124 PetriNetUnfolderBase]: 569/966 cut-off events. [2024-06-21 15:57:41,052 INFO L125 PetriNetUnfolderBase]: For 205/205 co-relation queries the response was YES. [2024-06-21 15:57:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2201 conditions, 966 events. 569/966 cut-off events. For 205/205 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 4919 event pairs, 293 based on Foata normal form. 3/937 useless extension candidates. Maximal degree in co-relation 2189. Up to 861 conditions per place. [2024-06-21 15:57:41,058 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 35 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-21 15:57:41,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 232 flow [2024-06-21 15:57:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:41,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2024-06-21 15:57:41,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-21 15:57:41,063 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 117 transitions. [2024-06-21 15:57:41,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 232 flow [2024-06-21 15:57:41,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 228 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:41,066 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 15:57:41,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 15:57:41,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 15:57:41,067 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 15:57:41,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:41,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:41,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 15:57:41,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:41,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1951982098, now seen corresponding path program 1 times [2024-06-21 15:57:41,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:41,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864377307] [2024-06-21 15:57:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:41,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:41,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864377307] [2024-06-21 15:57:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864377307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:41,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:41,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:57:41,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268832328] [2024-06-21 15:57:41,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:41,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:57:41,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:57:41,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:57:41,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:41,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:41,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:41,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:41,329 INFO L124 PetriNetUnfolderBase]: 936/1529 cut-off events. [2024-06-21 15:57:41,329 INFO L125 PetriNetUnfolderBase]: For 772/772 co-relation queries the response was YES. [2024-06-21 15:57:41,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3853 conditions, 1529 events. 936/1529 cut-off events. For 772/772 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 7770 event pairs, 533 based on Foata normal form. 3/1530 useless extension candidates. Maximal degree in co-relation 3839. Up to 1395 conditions per place. [2024-06-21 15:57:41,338 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 11 changer transitions 0/59 dead transitions. [2024-06-21 15:57:41,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 59 transitions, 300 flow [2024-06-21 15:57:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 111 transitions. [2024-06-21 15:57:41,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6607142857142857 [2024-06-21 15:57:41,342 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 4 states and 111 transitions. [2024-06-21 15:57:41,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 59 transitions, 300 flow [2024-06-21 15:57:41,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 59 transitions, 286 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:41,345 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 202 flow [2024-06-21 15:57:41,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=202, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-06-21 15:57:41,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-21 15:57:41,346 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 202 flow [2024-06-21 15:57:41,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:41,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:41,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 15:57:41,347 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:41,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:41,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1501446107, now seen corresponding path program 1 times [2024-06-21 15:57:41,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:41,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772697874] [2024-06-21 15:57:41,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:41,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:41,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:41,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772697874] [2024-06-21 15:57:41,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772697874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:41,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:41,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:41,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965402023] [2024-06-21 15:57:41,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:41,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:41,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:41,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:41,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:41,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 42 [2024-06-21 15:57:41,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 202 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:41,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 42 [2024-06-21 15:57:41,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:41,651 INFO L124 PetriNetUnfolderBase]: 857/1493 cut-off events. [2024-06-21 15:57:41,651 INFO L125 PetriNetUnfolderBase]: For 1498/1498 co-relation queries the response was YES. [2024-06-21 15:57:41,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4117 conditions, 1493 events. 857/1493 cut-off events. For 1498/1498 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7940 event pairs, 254 based on Foata normal form. 6/1463 useless extension candidates. Maximal degree in co-relation 4101. Up to 1227 conditions per place. [2024-06-21 15:57:41,659 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 53 selfloop transitions, 12 changer transitions 0/77 dead transitions. [2024-06-21 15:57:41,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 77 transitions, 418 flow [2024-06-21 15:57:41,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:41,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:41,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 164 transitions. [2024-06-21 15:57:41,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6507936507936508 [2024-06-21 15:57:41,660 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 202 flow. Second operand 6 states and 164 transitions. [2024-06-21 15:57:41,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 77 transitions, 418 flow [2024-06-21 15:57:41,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 77 transitions, 412 flow, removed 3 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:41,663 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-21 15:57:41,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-21 15:57:41,664 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 12 predicate places. [2024-06-21 15:57:41,664 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-21 15:57:41,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:41,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:41,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 15:57:41,665 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:41,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:41,665 INFO L85 PathProgramCache]: Analyzing trace with hash 408460797, now seen corresponding path program 1 times [2024-06-21 15:57:41,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:41,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95541610] [2024-06-21 15:57:41,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:41,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:41,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:41,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95541610] [2024-06-21 15:57:41,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95541610] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:41,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:41,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:41,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121040440] [2024-06-21 15:57:41,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:41,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:41,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:41,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:41,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:41,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:41,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:41,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:41,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:41,919 INFO L124 PetriNetUnfolderBase]: 968/1626 cut-off events. [2024-06-21 15:57:41,920 INFO L125 PetriNetUnfolderBase]: For 2753/2753 co-relation queries the response was YES. [2024-06-21 15:57:41,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5011 conditions, 1626 events. 968/1626 cut-off events. For 2753/2753 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8546 event pairs, 346 based on Foata normal form. 4/1622 useless extension candidates. Maximal degree in co-relation 4991. Up to 1333 conditions per place. [2024-06-21 15:57:41,931 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 57 selfloop transitions, 22 changer transitions 0/88 dead transitions. [2024-06-21 15:57:41,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 88 transitions, 575 flow [2024-06-21 15:57:41,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:41,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:41,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-21 15:57:41,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6857142857142857 [2024-06-21 15:57:41,933 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 5 states and 144 transitions. [2024-06-21 15:57:41,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 88 transitions, 575 flow [2024-06-21 15:57:41,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 88 transitions, 544 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:41,941 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 383 flow [2024-06-21 15:57:41,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=226, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=383, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-06-21 15:57:41,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-21 15:57:41,944 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 383 flow [2024-06-21 15:57:41,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:41,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:41,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:41,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 15:57:41,946 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:41,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:41,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1067838237, now seen corresponding path program 2 times [2024-06-21 15:57:41,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:41,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373462895] [2024-06-21 15:57:41,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:41,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:42,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:42,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373462895] [2024-06-21 15:57:42,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373462895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:42,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:42,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:42,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272793958] [2024-06-21 15:57:42,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:42,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:42,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:42,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:42,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:42,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:42,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 383 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:42,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:42,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:42,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:42,233 INFO L124 PetriNetUnfolderBase]: 993/1672 cut-off events. [2024-06-21 15:57:42,233 INFO L125 PetriNetUnfolderBase]: For 4535/4535 co-relation queries the response was YES. [2024-06-21 15:57:42,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5991 conditions, 1672 events. 993/1672 cut-off events. For 4535/4535 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8857 event pairs, 374 based on Foata normal form. 4/1670 useless extension candidates. Maximal degree in co-relation 5968. Up to 1359 conditions per place. [2024-06-21 15:57:42,246 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 30 changer transitions 0/92 dead transitions. [2024-06-21 15:57:42,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 92 transitions, 691 flow [2024-06-21 15:57:42,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:42,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:42,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-06-21 15:57:42,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 15:57:42,247 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 383 flow. Second operand 5 states and 140 transitions. [2024-06-21 15:57:42,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 92 transitions, 691 flow [2024-06-21 15:57:42,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 92 transitions, 661 flow, removed 15 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:42,256 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 546 flow [2024-06-21 15:57:42,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=546, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-06-21 15:57:42,258 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-21 15:57:42,258 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 546 flow [2024-06-21 15:57:42,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:42,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:42,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:42,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 15:57:42,259 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:42,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:42,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1045936365, now seen corresponding path program 1 times [2024-06-21 15:57:42,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:42,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65226105] [2024-06-21 15:57:42,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:42,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:42,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:42,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:42,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65226105] [2024-06-21 15:57:42,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65226105] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:42,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:42,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:42,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523288074] [2024-06-21 15:57:42,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:42,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:42,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:42,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:42,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:42,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:42,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 546 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:42,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:42,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:42,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:42,528 INFO L124 PetriNetUnfolderBase]: 995/1682 cut-off events. [2024-06-21 15:57:42,529 INFO L125 PetriNetUnfolderBase]: For 5890/5890 co-relation queries the response was YES. [2024-06-21 15:57:42,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6465 conditions, 1682 events. 995/1682 cut-off events. For 5890/5890 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8883 event pairs, 343 based on Foata normal form. 3/1683 useless extension candidates. Maximal degree in co-relation 6437. Up to 1456 conditions per place. [2024-06-21 15:57:42,540 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 72 selfloop transitions, 17 changer transitions 0/98 dead transitions. [2024-06-21 15:57:42,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 98 transitions, 822 flow [2024-06-21 15:57:42,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:42,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:42,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-21 15:57:42,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 15:57:42,541 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 546 flow. Second operand 5 states and 135 transitions. [2024-06-21 15:57:42,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 98 transitions, 822 flow [2024-06-21 15:57:42,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 98 transitions, 789 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:42,549 INFO L231 Difference]: Finished difference. Result has 70 places, 82 transitions, 610 flow [2024-06-21 15:57:42,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=610, PETRI_PLACES=70, PETRI_TRANSITIONS=82} [2024-06-21 15:57:42,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 15:57:42,550 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 82 transitions, 610 flow [2024-06-21 15:57:42,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:42,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:42,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:42,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 15:57:42,551 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:42,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:42,551 INFO L85 PathProgramCache]: Analyzing trace with hash -628573029, now seen corresponding path program 1 times [2024-06-21 15:57:42,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:42,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97455977] [2024-06-21 15:57:42,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:42,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:42,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97455977] [2024-06-21 15:57:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97455977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:42,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:42,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 15:57:42,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240900545] [2024-06-21 15:57:42,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:42,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 15:57:42,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:42,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 15:57:42,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 15:57:42,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:42,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 82 transitions, 610 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:42,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:42,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:42,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:42,774 INFO L124 PetriNetUnfolderBase]: 983/1653 cut-off events. [2024-06-21 15:57:42,775 INFO L125 PetriNetUnfolderBase]: For 7065/7065 co-relation queries the response was YES. [2024-06-21 15:57:42,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6632 conditions, 1653 events. 983/1653 cut-off events. For 7065/7065 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 8639 event pairs, 355 based on Foata normal form. 2/1651 useless extension candidates. Maximal degree in co-relation 6602. Up to 1462 conditions per place. [2024-06-21 15:57:42,787 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 70 selfloop transitions, 11 changer transitions 0/90 dead transitions. [2024-06-21 15:57:42,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 90 transitions, 792 flow [2024-06-21 15:57:42,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 15:57:42,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 15:57:42,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-21 15:57:42,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 15:57:42,789 INFO L175 Difference]: Start difference. First operand has 70 places, 82 transitions, 610 flow. Second operand 4 states and 105 transitions. [2024-06-21 15:57:42,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 90 transitions, 792 flow [2024-06-21 15:57:42,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 90 transitions, 762 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:42,798 INFO L231 Difference]: Finished difference. Result has 73 places, 82 transitions, 610 flow [2024-06-21 15:57:42,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=580, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=610, PETRI_PLACES=73, PETRI_TRANSITIONS=82} [2024-06-21 15:57:42,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 15:57:42,800 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 82 transitions, 610 flow [2024-06-21 15:57:42,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:42,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:42,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:42,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 15:57:42,801 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:42,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:42,801 INFO L85 PathProgramCache]: Analyzing trace with hash -199330566, now seen corresponding path program 1 times [2024-06-21 15:57:42,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:42,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827783268] [2024-06-21 15:57:42,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:42,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:42,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:42,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827783268] [2024-06-21 15:57:42,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827783268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:42,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:42,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:42,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620142108] [2024-06-21 15:57:42,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:42,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:42,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:42,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 82 transitions, 610 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:42,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:42,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:42,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:43,093 INFO L124 PetriNetUnfolderBase]: 1017/1708 cut-off events. [2024-06-21 15:57:43,094 INFO L125 PetriNetUnfolderBase]: For 8020/8020 co-relation queries the response was YES. [2024-06-21 15:57:43,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6973 conditions, 1708 events. 1017/1708 cut-off events. For 8020/8020 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 8944 event pairs, 334 based on Foata normal form. 3/1709 useless extension candidates. Maximal degree in co-relation 6940. Up to 1477 conditions per place. [2024-06-21 15:57:43,111 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 90 selfloop transitions, 18 changer transitions 0/117 dead transitions. [2024-06-21 15:57:43,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 117 transitions, 974 flow [2024-06-21 15:57:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:43,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:57:43,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 15:57:43,112 INFO L175 Difference]: Start difference. First operand has 73 places, 82 transitions, 610 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:57:43,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 117 transitions, 974 flow [2024-06-21 15:57:43,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 946 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:43,122 INFO L231 Difference]: Finished difference. Result has 78 places, 90 transitions, 708 flow [2024-06-21 15:57:43,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=708, PETRI_PLACES=78, PETRI_TRANSITIONS=90} [2024-06-21 15:57:43,123 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 35 predicate places. [2024-06-21 15:57:43,123 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 90 transitions, 708 flow [2024-06-21 15:57:43,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:43,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 15:57:43,124 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:43,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:43,124 INFO L85 PathProgramCache]: Analyzing trace with hash -194568966, now seen corresponding path program 2 times [2024-06-21 15:57:43,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:43,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989725667] [2024-06-21 15:57:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:43,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:43,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:43,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989725667] [2024-06-21 15:57:43,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989725667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:43,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:43,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:43,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966583210] [2024-06-21 15:57:43,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:43,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:43,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:43,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:43,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:43,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:43,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 90 transitions, 708 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:43,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:43,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:43,446 INFO L124 PetriNetUnfolderBase]: 1074/1810 cut-off events. [2024-06-21 15:57:43,447 INFO L125 PetriNetUnfolderBase]: For 10612/10612 co-relation queries the response was YES. [2024-06-21 15:57:43,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7903 conditions, 1810 events. 1074/1810 cut-off events. For 10612/10612 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 9715 event pairs, 333 based on Foata normal form. 4/1806 useless extension candidates. Maximal degree in co-relation 7869. Up to 1342 conditions per place. [2024-06-21 15:57:43,458 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 52 changer transitions 0/135 dead transitions. [2024-06-21 15:57:43,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 135 transitions, 1260 flow [2024-06-21 15:57:43,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:43,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:43,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 173 transitions. [2024-06-21 15:57:43,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6865079365079365 [2024-06-21 15:57:43,460 INFO L175 Difference]: Start difference. First operand has 78 places, 90 transitions, 708 flow. Second operand 6 states and 173 transitions. [2024-06-21 15:57:43,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 135 transitions, 1260 flow [2024-06-21 15:57:43,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 135 transitions, 1208 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:43,472 INFO L231 Difference]: Finished difference. Result has 82 places, 107 transitions, 943 flow [2024-06-21 15:57:43,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=656, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=943, PETRI_PLACES=82, PETRI_TRANSITIONS=107} [2024-06-21 15:57:43,473 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 15:57:43,473 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 107 transitions, 943 flow [2024-06-21 15:57:43,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:43,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:43,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 15:57:43,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:43,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:43,475 INFO L85 PathProgramCache]: Analyzing trace with hash -831125468, now seen corresponding path program 1 times [2024-06-21 15:57:43,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:43,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320693546] [2024-06-21 15:57:43,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:43,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:43,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:43,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320693546] [2024-06-21 15:57:43,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320693546] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:43,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:43,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:43,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370280319] [2024-06-21 15:57:43,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:43,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:43,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:43,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:43,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:43,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:43,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 107 transitions, 943 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:43,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:43,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:43,829 INFO L124 PetriNetUnfolderBase]: 1107/1870 cut-off events. [2024-06-21 15:57:43,829 INFO L125 PetriNetUnfolderBase]: For 13716/13716 co-relation queries the response was YES. [2024-06-21 15:57:43,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8940 conditions, 1870 events. 1107/1870 cut-off events. For 13716/13716 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 10171 event pairs, 324 based on Foata normal form. 4/1865 useless extension candidates. Maximal degree in co-relation 8903. Up to 1424 conditions per place. [2024-06-21 15:57:43,840 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 41 changer transitions 0/146 dead transitions. [2024-06-21 15:57:43,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 146 transitions, 1453 flow [2024-06-21 15:57:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:43,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:43,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 171 transitions. [2024-06-21 15:57:43,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6785714285714286 [2024-06-21 15:57:43,842 INFO L175 Difference]: Start difference. First operand has 82 places, 107 transitions, 943 flow. Second operand 6 states and 171 transitions. [2024-06-21 15:57:43,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 146 transitions, 1453 flow [2024-06-21 15:57:43,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 146 transitions, 1393 flow, removed 30 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:43,857 INFO L231 Difference]: Finished difference. Result has 89 places, 120 transitions, 1106 flow [2024-06-21 15:57:43,857 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=887, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1106, PETRI_PLACES=89, PETRI_TRANSITIONS=120} [2024-06-21 15:57:43,857 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-21 15:57:43,857 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 120 transitions, 1106 flow [2024-06-21 15:57:43,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:43,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:43,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 15:57:43,858 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:43,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:43,859 INFO L85 PathProgramCache]: Analyzing trace with hash -747910820, now seen corresponding path program 3 times [2024-06-21 15:57:43,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:43,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048553334] [2024-06-21 15:57:43,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:43,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:43,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:43,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:43,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:43,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048553334] [2024-06-21 15:57:43,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048553334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:43,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:43,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:43,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518206608] [2024-06-21 15:57:43,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:43,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:43,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:43,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:43,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:43,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:43,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 120 transitions, 1106 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:43,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:43,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:43,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:44,140 INFO L124 PetriNetUnfolderBase]: 1122/1897 cut-off events. [2024-06-21 15:57:44,141 INFO L125 PetriNetUnfolderBase]: For 15861/15861 co-relation queries the response was YES. [2024-06-21 15:57:44,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9533 conditions, 1897 events. 1122/1897 cut-off events. For 15861/15861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 10371 event pairs, 342 based on Foata normal form. 4/1895 useless extension candidates. Maximal degree in co-relation 9492. Up to 1407 conditions per place. [2024-06-21 15:57:44,154 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-21 15:57:44,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 150 transitions, 1578 flow [2024-06-21 15:57:44,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:44,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:44,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 15:57:44,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6626984126984127 [2024-06-21 15:57:44,156 INFO L175 Difference]: Start difference. First operand has 89 places, 120 transitions, 1106 flow. Second operand 6 states and 167 transitions. [2024-06-21 15:57:44,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 150 transitions, 1578 flow [2024-06-21 15:57:44,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 150 transitions, 1529 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:44,205 INFO L231 Difference]: Finished difference. Result has 95 places, 129 transitions, 1309 flow [2024-06-21 15:57:44,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1057, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1309, PETRI_PLACES=95, PETRI_TRANSITIONS=129} [2024-06-21 15:57:44,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 15:57:44,206 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 129 transitions, 1309 flow [2024-06-21 15:57:44,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:44,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:44,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:44,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 15:57:44,207 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:44,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:44,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1916727322, now seen corresponding path program 2 times [2024-06-21 15:57:44,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:44,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580739433] [2024-06-21 15:57:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:44,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:44,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:44,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:44,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580739433] [2024-06-21 15:57:44,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580739433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:44,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:44,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:44,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795449037] [2024-06-21 15:57:44,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:44,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:44,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:44,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:44,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:44,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:44,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 129 transitions, 1309 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:44,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:44,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:44,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:44,504 INFO L124 PetriNetUnfolderBase]: 1177/2001 cut-off events. [2024-06-21 15:57:44,504 INFO L125 PetriNetUnfolderBase]: For 18973/18973 co-relation queries the response was YES. [2024-06-21 15:57:44,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10489 conditions, 2001 events. 1177/2001 cut-off events. For 18973/18973 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11090 event pairs, 330 based on Foata normal form. 4/2001 useless extension candidates. Maximal degree in co-relation 10444. Up to 1498 conditions per place. [2024-06-21 15:57:44,519 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 52 changer transitions 0/166 dead transitions. [2024-06-21 15:57:44,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 166 transitions, 1911 flow [2024-06-21 15:57:44,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:44,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:44,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 170 transitions. [2024-06-21 15:57:44,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6746031746031746 [2024-06-21 15:57:44,521 INFO L175 Difference]: Start difference. First operand has 95 places, 129 transitions, 1309 flow. Second operand 6 states and 170 transitions. [2024-06-21 15:57:44,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 166 transitions, 1911 flow [2024-06-21 15:57:44,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 166 transitions, 1832 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:44,567 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1515 flow [2024-06-21 15:57:44,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1230, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1515, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-21 15:57:44,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-21 15:57:44,568 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1515 flow [2024-06-21 15:57:44,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:44,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:44,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:44,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 15:57:44,569 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:44,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:44,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1925298202, now seen corresponding path program 3 times [2024-06-21 15:57:44,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:44,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729382370] [2024-06-21 15:57:44,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:44,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:44,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:44,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:44,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:44,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729382370] [2024-06-21 15:57:44,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729382370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:44,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:44,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:44,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722180089] [2024-06-21 15:57:44,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:44,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:44,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:44,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:44,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:44,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:44,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1515 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:44,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:44,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:44,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:44,873 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-21 15:57:44,873 INFO L125 PetriNetUnfolderBase]: For 21139/21139 co-relation queries the response was YES. [2024-06-21 15:57:44,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10655 conditions, 1989 events. 1168/1989 cut-off events. For 21139/21139 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 11024 event pairs, 330 based on Foata normal form. 4/1989 useless extension candidates. Maximal degree in co-relation 10607. Up to 1492 conditions per place. [2024-06-21 15:57:44,887 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 105 selfloop transitions, 51 changer transitions 0/165 dead transitions. [2024-06-21 15:57:44,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 165 transitions, 1959 flow [2024-06-21 15:57:44,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:44,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 168 transitions. [2024-06-21 15:57:44,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 15:57:44,889 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1515 flow. Second operand 6 states and 168 transitions. [2024-06-21 15:57:44,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 165 transitions, 1959 flow [2024-06-21 15:57:44,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 165 transitions, 1907 flow, removed 26 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:44,915 INFO L231 Difference]: Finished difference. Result has 106 places, 143 transitions, 1576 flow [2024-06-21 15:57:44,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1463, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1576, PETRI_PLACES=106, PETRI_TRANSITIONS=143} [2024-06-21 15:57:44,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 63 predicate places. [2024-06-21 15:57:44,916 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 143 transitions, 1576 flow [2024-06-21 15:57:44,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:44,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:44,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:44,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 15:57:44,916 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:44,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:44,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1925309114, now seen corresponding path program 1 times [2024-06-21 15:57:44,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:44,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934179827] [2024-06-21 15:57:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:44,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:44,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:44,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:44,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:44,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934179827] [2024-06-21 15:57:44,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934179827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:44,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:44,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:44,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010956739] [2024-06-21 15:57:44,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:44,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:44,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:44,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:44,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:45,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:45,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 143 transitions, 1576 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:45,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:45,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:45,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:45,240 INFO L124 PetriNetUnfolderBase]: 1168/1989 cut-off events. [2024-06-21 15:57:45,240 INFO L125 PetriNetUnfolderBase]: For 23742/23742 co-relation queries the response was YES. [2024-06-21 15:57:45,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10997 conditions, 1989 events. 1168/1989 cut-off events. For 23742/23742 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 10959 event pairs, 314 based on Foata normal form. 6/1993 useless extension candidates. Maximal degree in co-relation 10946. Up to 1681 conditions per place. [2024-06-21 15:57:45,254 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 138 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-21 15:57:45,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 167 transitions, 2020 flow [2024-06-21 15:57:45,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:45,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:57:45,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 15:57:45,256 INFO L175 Difference]: Start difference. First operand has 106 places, 143 transitions, 1576 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:57:45,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 167 transitions, 2020 flow [2024-06-21 15:57:45,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1909 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:45,281 INFO L231 Difference]: Finished difference. Result has 108 places, 146 transitions, 1567 flow [2024-06-21 15:57:45,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1465, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=108, PETRI_TRANSITIONS=146} [2024-06-21 15:57:45,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 15:57:45,282 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 146 transitions, 1567 flow [2024-06-21 15:57:45,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:45,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:45,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:45,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 15:57:45,282 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:45,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:45,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1989073823, now seen corresponding path program 1 times [2024-06-21 15:57:45,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:45,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536774153] [2024-06-21 15:57:45,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:45,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:45,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:45,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:45,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536774153] [2024-06-21 15:57:45,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536774153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:45,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:45,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:45,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266031771] [2024-06-21 15:57:45,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:45,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:45,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:45,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:45,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:45,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:45,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 146 transitions, 1567 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:45,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:45,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:45,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:45,586 INFO L124 PetriNetUnfolderBase]: 1160/1967 cut-off events. [2024-06-21 15:57:45,586 INFO L125 PetriNetUnfolderBase]: For 24840/24840 co-relation queries the response was YES. [2024-06-21 15:57:45,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10933 conditions, 1967 events. 1160/1967 cut-off events. For 24840/24840 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 10880 event pairs, 332 based on Foata normal form. 4/1962 useless extension candidates. Maximal degree in co-relation 10881. Up to 1613 conditions per place. [2024-06-21 15:57:45,598 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 30 changer transitions 0/157 dead transitions. [2024-06-21 15:57:45,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 157 transitions, 1949 flow [2024-06-21 15:57:45,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 15:57:45,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 15:57:45,600 INFO L175 Difference]: Start difference. First operand has 108 places, 146 transitions, 1567 flow. Second operand 5 states and 133 transitions. [2024-06-21 15:57:45,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 157 transitions, 1949 flow [2024-06-21 15:57:45,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 157 transitions, 1871 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:45,622 INFO L231 Difference]: Finished difference. Result has 109 places, 146 transitions, 1558 flow [2024-06-21 15:57:45,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1489, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1558, PETRI_PLACES=109, PETRI_TRANSITIONS=146} [2024-06-21 15:57:45,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-21 15:57:45,623 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 146 transitions, 1558 flow [2024-06-21 15:57:45,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:45,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:45,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:45,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 15:57:45,624 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)] === [2024-06-21 15:57:45,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:45,624 INFO L85 PathProgramCache]: Analyzing trace with hash 563819642, now seen corresponding path program 1 times [2024-06-21 15:57:45,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:45,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611642437] [2024-06-21 15:57:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:45,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:45,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:45,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:45,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611642437] [2024-06-21 15:57:45,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611642437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:45,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:45,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:45,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341083763] [2024-06-21 15:57:45,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:45,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:45,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:45,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:45,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:45,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:45,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 146 transitions, 1558 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:45,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:45,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:45,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:45,879 INFO L124 PetriNetUnfolderBase]: 1170/1993 cut-off events. [2024-06-21 15:57:45,880 INFO L125 PetriNetUnfolderBase]: For 26096/26096 co-relation queries the response was YES. [2024-06-21 15:57:45,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11176 conditions, 1993 events. 1170/1993 cut-off events. For 26096/26096 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11000 event pairs, 322 based on Foata normal form. 2/1989 useless extension candidates. Maximal degree in co-relation 11123. Up to 1619 conditions per place. [2024-06-21 15:57:45,895 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 124 selfloop transitions, 34 changer transitions 0/167 dead transitions. [2024-06-21 15:57:45,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 167 transitions, 2054 flow [2024-06-21 15:57:45,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-21 15:57:45,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6571428571428571 [2024-06-21 15:57:45,896 INFO L175 Difference]: Start difference. First operand has 109 places, 146 transitions, 1558 flow. Second operand 5 states and 138 transitions. [2024-06-21 15:57:45,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 167 transitions, 2054 flow [2024-06-21 15:57:45,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 167 transitions, 1940 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:45,929 INFO L231 Difference]: Finished difference. Result has 108 places, 150 transitions, 1597 flow [2024-06-21 15:57:45,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1453, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1597, PETRI_PLACES=108, PETRI_TRANSITIONS=150} [2024-06-21 15:57:45,930 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-21 15:57:45,930 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 150 transitions, 1597 flow [2024-06-21 15:57:45,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:45,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:45,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:45,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 15:57:45,931 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:45,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:45,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1531731770, now seen corresponding path program 2 times [2024-06-21 15:57:45,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:45,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645194870] [2024-06-21 15:57:45,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:45,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:45,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:45,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645194870] [2024-06-21 15:57:45,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645194870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:45,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:45,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:45,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235481005] [2024-06-21 15:57:45,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:45,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:46,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:46,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 150 transitions, 1597 flow. Second operand has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:46,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:46,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:46,173 INFO L124 PetriNetUnfolderBase]: 1142/1930 cut-off events. [2024-06-21 15:57:46,174 INFO L125 PetriNetUnfolderBase]: For 27273/27273 co-relation queries the response was YES. [2024-06-21 15:57:46,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10791 conditions, 1930 events. 1142/1930 cut-off events. For 27273/27273 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10525 event pairs, 336 based on Foata normal form. 4/1925 useless extension candidates. Maximal degree in co-relation 10741. Up to 1589 conditions per place. [2024-06-21 15:57:46,189 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 118 selfloop transitions, 33 changer transitions 0/160 dead transitions. [2024-06-21 15:57:46,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 160 transitions, 1957 flow [2024-06-21 15:57:46,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:46,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:46,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-06-21 15:57:46,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 15:57:46,190 INFO L175 Difference]: Start difference. First operand has 108 places, 150 transitions, 1597 flow. Second operand 5 states and 132 transitions. [2024-06-21 15:57:46,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 160 transitions, 1957 flow [2024-06-21 15:57:46,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 160 transitions, 1898 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:46,221 INFO L231 Difference]: Finished difference. Result has 111 places, 150 transitions, 1613 flow [2024-06-21 15:57:46,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1538, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1613, PETRI_PLACES=111, PETRI_TRANSITIONS=150} [2024-06-21 15:57:46,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 68 predicate places. [2024-06-21 15:57:46,223 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 150 transitions, 1613 flow [2024-06-21 15:57:46,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.4) internal successors, (92), 5 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:46,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:46,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 15:57:46,223 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:46,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:46,224 INFO L85 PathProgramCache]: Analyzing trace with hash -10456871, now seen corresponding path program 1 times [2024-06-21 15:57:46,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:46,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844817894] [2024-06-21 15:57:46,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:46,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:46,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:46,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844817894] [2024-06-21 15:57:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844817894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:46,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:46,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:46,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434125871] [2024-06-21 15:57:46,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:46,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:46,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:46,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:46,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:46,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 150 transitions, 1613 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:46,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:46,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:46,624 INFO L124 PetriNetUnfolderBase]: 1221/2074 cut-off events. [2024-06-21 15:57:46,625 INFO L125 PetriNetUnfolderBase]: For 31356/31356 co-relation queries the response was YES. [2024-06-21 15:57:46,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11669 conditions, 2074 events. 1221/2074 cut-off events. For 31356/31356 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11459 event pairs, 189 based on Foata normal form. 6/2078 useless extension candidates. Maximal degree in co-relation 11618. Up to 1650 conditions per place. [2024-06-21 15:57:46,643 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 163 selfloop transitions, 23 changer transitions 0/195 dead transitions. [2024-06-21 15:57:46,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 195 transitions, 2291 flow [2024-06-21 15:57:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:46,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 15:57:46,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 15:57:46,645 INFO L175 Difference]: Start difference. First operand has 111 places, 150 transitions, 1613 flow. Second operand 8 states and 212 transitions. [2024-06-21 15:57:46,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 195 transitions, 2291 flow [2024-06-21 15:57:46,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 195 transitions, 2169 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:46,684 INFO L231 Difference]: Finished difference. Result has 114 places, 156 transitions, 1646 flow [2024-06-21 15:57:46,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1491, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1646, PETRI_PLACES=114, PETRI_TRANSITIONS=156} [2024-06-21 15:57:46,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-21 15:57:46,684 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 156 transitions, 1646 flow [2024-06-21 15:57:46,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:46,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:46,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 15:57:46,685 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)] === [2024-06-21 15:57:46,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:46,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1714077115, now seen corresponding path program 2 times [2024-06-21 15:57:46,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:46,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869330952] [2024-06-21 15:57:46,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:46,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:46,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:46,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:46,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869330952] [2024-06-21 15:57:46,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869330952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:46,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:46,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:46,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794613793] [2024-06-21 15:57:46,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:46,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:46,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:46,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:46,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:46,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:46,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 156 transitions, 1646 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:46,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:46,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:46,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:47,087 INFO L124 PetriNetUnfolderBase]: 1224/2073 cut-off events. [2024-06-21 15:57:47,087 INFO L125 PetriNetUnfolderBase]: For 33029/33029 co-relation queries the response was YES. [2024-06-21 15:57:47,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11983 conditions, 2073 events. 1224/2073 cut-off events. For 33029/33029 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11416 event pairs, 288 based on Foata normal form. 6/2077 useless extension candidates. Maximal degree in co-relation 11930. Up to 1754 conditions per place. [2024-06-21 15:57:47,104 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 161 selfloop transitions, 21 changer transitions 0/191 dead transitions. [2024-06-21 15:57:47,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 191 transitions, 2186 flow [2024-06-21 15:57:47,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:47,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 15:57:47,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-21 15:57:47,106 INFO L175 Difference]: Start difference. First operand has 114 places, 156 transitions, 1646 flow. Second operand 8 states and 205 transitions. [2024-06-21 15:57:47,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 191 transitions, 2186 flow [2024-06-21 15:57:47,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 191 transitions, 2086 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:47,148 INFO L231 Difference]: Finished difference. Result has 118 places, 159 transitions, 1660 flow [2024-06-21 15:57:47,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1562, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1660, PETRI_PLACES=118, PETRI_TRANSITIONS=159} [2024-06-21 15:57:47,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 15:57:47,149 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 159 transitions, 1660 flow [2024-06-21 15:57:47,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:47,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:47,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:47,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 15:57:47,150 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:47,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1716878585, now seen corresponding path program 1 times [2024-06-21 15:57:47,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:47,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993713690] [2024-06-21 15:57:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:47,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:47,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:47,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993713690] [2024-06-21 15:57:47,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993713690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:47,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443654978] [2024-06-21 15:57:47,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:47,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:47,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:47,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 159 transitions, 1660 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:47,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:47,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:47,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:47,503 INFO L124 PetriNetUnfolderBase]: 1250/2117 cut-off events. [2024-06-21 15:57:47,504 INFO L125 PetriNetUnfolderBase]: For 34891/34891 co-relation queries the response was YES. [2024-06-21 15:57:47,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12204 conditions, 2117 events. 1250/2117 cut-off events. For 34891/34891 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11686 event pairs, 273 based on Foata normal form. 3/2118 useless extension candidates. Maximal degree in co-relation 12149. Up to 1797 conditions per place. [2024-06-21 15:57:47,519 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 24 changer transitions 0/197 dead transitions. [2024-06-21 15:57:47,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 197 transitions, 2242 flow [2024-06-21 15:57:47,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:57:47,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:57:47,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 15:57:47,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-21 15:57:47,521 INFO L175 Difference]: Start difference. First operand has 118 places, 159 transitions, 1660 flow. Second operand 8 states and 206 transitions. [2024-06-21 15:57:47,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 197 transitions, 2242 flow [2024-06-21 15:57:47,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 197 transitions, 2174 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:47,565 INFO L231 Difference]: Finished difference. Result has 120 places, 166 transitions, 1745 flow [2024-06-21 15:57:47,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1592, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1745, PETRI_PLACES=120, PETRI_TRANSITIONS=166} [2024-06-21 15:57:47,565 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-21 15:57:47,566 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 166 transitions, 1745 flow [2024-06-21 15:57:47,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:47,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:47,566 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:47,566 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 15:57:47,566 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:47,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1997803929, now seen corresponding path program 3 times [2024-06-21 15:57:47,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:47,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308559855] [2024-06-21 15:57:47,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:47,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:47,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:47,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308559855] [2024-06-21 15:57:47,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308559855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:47,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:47,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:47,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921199615] [2024-06-21 15:57:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:47,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:47,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:47,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:47,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:47,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 166 transitions, 1745 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:47,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:47,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:47,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:47,929 INFO L124 PetriNetUnfolderBase]: 1303/2196 cut-off events. [2024-06-21 15:57:47,930 INFO L125 PetriNetUnfolderBase]: For 41822/41822 co-relation queries the response was YES. [2024-06-21 15:57:47,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12942 conditions, 2196 events. 1303/2196 cut-off events. For 41822/41822 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12129 event pairs, 283 based on Foata normal form. 14/2202 useless extension candidates. Maximal degree in co-relation 12886. Up to 1640 conditions per place. [2024-06-21 15:57:47,947 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 128 selfloop transitions, 65 changer transitions 0/202 dead transitions. [2024-06-21 15:57:47,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 202 transitions, 2411 flow [2024-06-21 15:57:47,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:47,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 15:57:47,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-21 15:57:47,949 INFO L175 Difference]: Start difference. First operand has 120 places, 166 transitions, 1745 flow. Second operand 7 states and 199 transitions. [2024-06-21 15:57:47,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 202 transitions, 2411 flow [2024-06-21 15:57:47,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 2329 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:47,987 INFO L231 Difference]: Finished difference. Result has 123 places, 169 transitions, 1870 flow [2024-06-21 15:57:47,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1663, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1870, PETRI_PLACES=123, PETRI_TRANSITIONS=169} [2024-06-21 15:57:47,988 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-21 15:57:47,988 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 169 transitions, 1870 flow [2024-06-21 15:57:47,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:47,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:47,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:47,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 15:57:47,988 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:47,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:47,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1997808889, now seen corresponding path program 2 times [2024-06-21 15:57:47,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:47,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769116408] [2024-06-21 15:57:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:47,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:48,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:48,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:48,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769116408] [2024-06-21 15:57:48,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769116408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:48,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:48,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:48,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995004313] [2024-06-21 15:57:48,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:48,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:48,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:48,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:48,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:48,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 169 transitions, 1870 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:48,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:48,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:48,348 INFO L124 PetriNetUnfolderBase]: 1380/2323 cut-off events. [2024-06-21 15:57:48,348 INFO L125 PetriNetUnfolderBase]: For 46034/46034 co-relation queries the response was YES. [2024-06-21 15:57:48,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14247 conditions, 2323 events. 1380/2323 cut-off events. For 46034/46034 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13044 event pairs, 286 based on Foata normal form. 4/2314 useless extension candidates. Maximal degree in co-relation 14189. Up to 1530 conditions per place. [2024-06-21 15:57:48,367 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 99 changer transitions 0/223 dead transitions. [2024-06-21 15:57:48,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 223 transitions, 2932 flow [2024-06-21 15:57:48,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:48,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-21 15:57:48,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6938775510204082 [2024-06-21 15:57:48,369 INFO L175 Difference]: Start difference. First operand has 123 places, 169 transitions, 1870 flow. Second operand 7 states and 204 transitions. [2024-06-21 15:57:48,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 223 transitions, 2932 flow [2024-06-21 15:57:48,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 223 transitions, 2765 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:48,424 INFO L231 Difference]: Finished difference. Result has 126 places, 190 transitions, 2207 flow [2024-06-21 15:57:48,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1703, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2207, PETRI_PLACES=126, PETRI_TRANSITIONS=190} [2024-06-21 15:57:48,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-21 15:57:48,425 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 190 transitions, 2207 flow [2024-06-21 15:57:48,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:48,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:48,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 15:57:48,426 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)] === [2024-06-21 15:57:48,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 2004475129, now seen corresponding path program 3 times [2024-06-21 15:57:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:48,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103685617] [2024-06-21 15:57:48,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:48,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:48,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:48,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103685617] [2024-06-21 15:57:48,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103685617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:48,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:48,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:48,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738285687] [2024-06-21 15:57:48,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:48,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:48,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:48,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:48,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:48,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:48,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 190 transitions, 2207 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:48,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:48,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:48,776 INFO L124 PetriNetUnfolderBase]: 1369/2308 cut-off events. [2024-06-21 15:57:48,776 INFO L125 PetriNetUnfolderBase]: For 49740/49740 co-relation queries the response was YES. [2024-06-21 15:57:48,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14593 conditions, 2308 events. 1369/2308 cut-off events. For 49740/49740 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 12961 event pairs, 286 based on Foata normal form. 4/2299 useless extension candidates. Maximal degree in co-relation 14533. Up to 1521 conditions per place. [2024-06-21 15:57:48,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 112 selfloop transitions, 101 changer transitions 0/222 dead transitions. [2024-06-21 15:57:48,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 222 transitions, 2971 flow [2024-06-21 15:57:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:48,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 202 transitions. [2024-06-21 15:57:48,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6870748299319728 [2024-06-21 15:57:48,830 INFO L175 Difference]: Start difference. First operand has 126 places, 190 transitions, 2207 flow. Second operand 7 states and 202 transitions. [2024-06-21 15:57:48,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 222 transitions, 2971 flow [2024-06-21 15:57:48,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 222 transitions, 2827 flow, removed 72 selfloop flow, removed 0 redundant places. [2024-06-21 15:57:48,893 INFO L231 Difference]: Finished difference. Result has 133 places, 190 transitions, 2275 flow [2024-06-21 15:57:48,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2275, PETRI_PLACES=133, PETRI_TRANSITIONS=190} [2024-06-21 15:57:48,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-21 15:57:48,894 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 190 transitions, 2275 flow [2024-06-21 15:57:48,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:48,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:48,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:48,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 15:57:48,895 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:48,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:48,895 INFO L85 PathProgramCache]: Analyzing trace with hash 2004484057, now seen corresponding path program 1 times [2024-06-21 15:57:48,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:48,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533272624] [2024-06-21 15:57:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:48,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:48,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:48,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533272624] [2024-06-21 15:57:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533272624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:48,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:48,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:48,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302127709] [2024-06-21 15:57:48,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:48,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:48,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:48,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:48,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:49,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:49,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 190 transitions, 2275 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:49,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:49,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:49,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:49,298 INFO L124 PetriNetUnfolderBase]: 1422/2390 cut-off events. [2024-06-21 15:57:49,298 INFO L125 PetriNetUnfolderBase]: For 58062/58062 co-relation queries the response was YES. [2024-06-21 15:57:49,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15385 conditions, 2390 events. 1422/2390 cut-off events. For 58062/58062 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13485 event pairs, 296 based on Foata normal form. 14/2394 useless extension candidates. Maximal degree in co-relation 15322. Up to 1836 conditions per place. [2024-06-21 15:57:49,319 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 59 changer transitions 0/225 dead transitions. [2024-06-21 15:57:49,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 225 transitions, 2965 flow [2024-06-21 15:57:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:49,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:49,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-21 15:57:49,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6700680272108843 [2024-06-21 15:57:49,321 INFO L175 Difference]: Start difference. First operand has 133 places, 190 transitions, 2275 flow. Second operand 7 states and 197 transitions. [2024-06-21 15:57:49,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 225 transitions, 2965 flow [2024-06-21 15:57:49,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 225 transitions, 2759 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:49,380 INFO L231 Difference]: Finished difference. Result has 135 places, 193 transitions, 2270 flow [2024-06-21 15:57:49,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2069, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2270, PETRI_PLACES=135, PETRI_TRANSITIONS=193} [2024-06-21 15:57:49,381 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 15:57:49,381 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 193 transitions, 2270 flow [2024-06-21 15:57:49,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:49,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:49,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:49,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 15:57:49,382 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:49,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:49,382 INFO L85 PathProgramCache]: Analyzing trace with hash -682735781, now seen corresponding path program 4 times [2024-06-21 15:57:49,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:49,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126773978] [2024-06-21 15:57:49,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:49,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:49,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:49,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126773978] [2024-06-21 15:57:49,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126773978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:49,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:49,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:49,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463043756] [2024-06-21 15:57:49,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:49,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:49,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:49,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:49,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:49,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 193 transitions, 2270 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:49,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:49,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:49,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:49,843 INFO L124 PetriNetUnfolderBase]: 1460/2461 cut-off events. [2024-06-21 15:57:49,843 INFO L125 PetriNetUnfolderBase]: For 60412/60412 co-relation queries the response was YES. [2024-06-21 15:57:49,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15730 conditions, 2461 events. 1460/2461 cut-off events. For 60412/60412 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13990 event pairs, 312 based on Foata normal form. 14/2469 useless extension candidates. Maximal degree in co-relation 15666. Up to 1866 conditions per place. [2024-06-21 15:57:49,867 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 155 selfloop transitions, 61 changer transitions 0/225 dead transitions. [2024-06-21 15:57:49,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 225 transitions, 2966 flow [2024-06-21 15:57:49,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:49,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:49,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 194 transitions. [2024-06-21 15:57:49,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6598639455782312 [2024-06-21 15:57:49,869 INFO L175 Difference]: Start difference. First operand has 135 places, 193 transitions, 2270 flow. Second operand 7 states and 194 transitions. [2024-06-21 15:57:49,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 225 transitions, 2966 flow [2024-06-21 15:57:49,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 225 transitions, 2807 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:49,933 INFO L231 Difference]: Finished difference. Result has 137 places, 196 transitions, 2326 flow [2024-06-21 15:57:49,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2111, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2326, PETRI_PLACES=137, PETRI_TRANSITIONS=196} [2024-06-21 15:57:49,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 94 predicate places. [2024-06-21 15:57:49,934 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 196 transitions, 2326 flow [2024-06-21 15:57:49,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:49,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:49,935 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:49,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 15:57:49,935 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:49,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:49,935 INFO L85 PathProgramCache]: Analyzing trace with hash -565996295, now seen corresponding path program 4 times [2024-06-21 15:57:49,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:49,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625283035] [2024-06-21 15:57:49,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:49,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:49,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:49,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:49,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625283035] [2024-06-21 15:57:49,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625283035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:49,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:50,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277547453] [2024-06-21 15:57:50,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:50,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:50,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:50,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:50,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:50,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:50,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 196 transitions, 2326 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:50,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:50,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:50,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:50,340 INFO L124 PetriNetUnfolderBase]: 1539/2597 cut-off events. [2024-06-21 15:57:50,340 INFO L125 PetriNetUnfolderBase]: For 64940/64940 co-relation queries the response was YES. [2024-06-21 15:57:50,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16838 conditions, 2597 events. 1539/2597 cut-off events. For 64940/64940 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 14979 event pairs, 320 based on Foata normal form. 4/2595 useless extension candidates. Maximal degree in co-relation 16773. Up to 1742 conditions per place. [2024-06-21 15:57:50,361 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 106 changer transitions 0/243 dead transitions. [2024-06-21 15:57:50,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 243 transitions, 3460 flow [2024-06-21 15:57:50,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:50,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:50,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 201 transitions. [2024-06-21 15:57:50,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6836734693877551 [2024-06-21 15:57:50,362 INFO L175 Difference]: Start difference. First operand has 137 places, 196 transitions, 2326 flow. Second operand 7 states and 201 transitions. [2024-06-21 15:57:50,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 243 transitions, 3460 flow [2024-06-21 15:57:50,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 243 transitions, 3287 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:50,437 INFO L231 Difference]: Finished difference. Result has 139 places, 214 transitions, 2679 flow [2024-06-21 15:57:50,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2153, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2679, PETRI_PLACES=139, PETRI_TRANSITIONS=214} [2024-06-21 15:57:50,438 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 15:57:50,438 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 214 transitions, 2679 flow [2024-06-21 15:57:50,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:50,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:50,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:50,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 15:57:50,439 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:50,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:50,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1646958669, now seen corresponding path program 5 times [2024-06-21 15:57:50,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:50,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108438476] [2024-06-21 15:57:50,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:50,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:50,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108438476] [2024-06-21 15:57:50,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108438476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:50,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:50,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:50,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100147975] [2024-06-21 15:57:50,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:50,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:50,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:50,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:50,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:50,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:50,524 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 214 transitions, 2679 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:50,524 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:50,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:50,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:50,835 INFO L124 PetriNetUnfolderBase]: 1530/2585 cut-off events. [2024-06-21 15:57:50,835 INFO L125 PetriNetUnfolderBase]: For 66640/66640 co-relation queries the response was YES. [2024-06-21 15:57:50,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16850 conditions, 2585 events. 1530/2585 cut-off events. For 66640/66640 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 14891 event pairs, 320 based on Foata normal form. 4/2583 useless extension candidates. Maximal degree in co-relation 16784. Up to 1736 conditions per place. [2024-06-21 15:57:50,856 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 107 changer transitions 0/241 dead transitions. [2024-06-21 15:57:50,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 241 transitions, 3417 flow [2024-06-21 15:57:50,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:50,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-21 15:57:50,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.673469387755102 [2024-06-21 15:57:50,858 INFO L175 Difference]: Start difference. First operand has 139 places, 214 transitions, 2679 flow. Second operand 7 states and 198 transitions. [2024-06-21 15:57:50,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 241 transitions, 3417 flow [2024-06-21 15:57:50,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 241 transitions, 3255 flow, removed 75 selfloop flow, removed 1 redundant places. [2024-06-21 15:57:50,944 INFO L231 Difference]: Finished difference. Result has 145 places, 214 transitions, 2741 flow [2024-06-21 15:57:50,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2517, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2741, PETRI_PLACES=145, PETRI_TRANSITIONS=214} [2024-06-21 15:57:50,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 15:57:50,944 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 214 transitions, 2741 flow [2024-06-21 15:57:50,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:50,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:50,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:50,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 15:57:50,945 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)] === [2024-06-21 15:57:50,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:50,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1772588459, now seen corresponding path program 6 times [2024-06-21 15:57:50,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:50,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396047271] [2024-06-21 15:57:50,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:50,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:51,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:51,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396047271] [2024-06-21 15:57:51,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396047271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:51,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:51,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:51,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020498271] [2024-06-21 15:57:51,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:51,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:51,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:51,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:51,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:51,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:51,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 214 transitions, 2741 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:51,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:51,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:51,317 INFO L124 PetriNetUnfolderBase]: 1521/2576 cut-off events. [2024-06-21 15:57:51,317 INFO L125 PetriNetUnfolderBase]: For 68643/68643 co-relation queries the response was YES. [2024-06-21 15:57:51,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17000 conditions, 2576 events. 1521/2576 cut-off events. For 68643/68643 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 14874 event pairs, 318 based on Foata normal form. 4/2574 useless extension candidates. Maximal degree in co-relation 16932. Up to 1730 conditions per place. [2024-06-21 15:57:51,338 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 106 changer transitions 0/240 dead transitions. [2024-06-21 15:57:51,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 240 transitions, 3435 flow [2024-06-21 15:57:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:51,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:51,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 196 transitions. [2024-06-21 15:57:51,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 15:57:51,339 INFO L175 Difference]: Start difference. First operand has 145 places, 214 transitions, 2741 flow. Second operand 7 states and 196 transitions. [2024-06-21 15:57:51,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 240 transitions, 3435 flow [2024-06-21 15:57:51,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 240 transitions, 3138 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:51,436 INFO L231 Difference]: Finished difference. Result has 146 places, 214 transitions, 2666 flow [2024-06-21 15:57:51,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2444, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2666, PETRI_PLACES=146, PETRI_TRANSITIONS=214} [2024-06-21 15:57:51,437 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 15:57:51,437 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 214 transitions, 2666 flow [2024-06-21 15:57:51,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:51,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:51,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:51,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 15:57:51,438 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:51,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:51,438 INFO L85 PathProgramCache]: Analyzing trace with hash -565987367, now seen corresponding path program 2 times [2024-06-21 15:57:51,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:51,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288013551] [2024-06-21 15:57:51,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:51,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:51,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:51,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288013551] [2024-06-21 15:57:51,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288013551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:51,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:51,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:51,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478988029] [2024-06-21 15:57:51,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:51,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:51,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:51,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:51,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:51,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:51,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 214 transitions, 2666 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:51,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:51,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:51,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:51,837 INFO L124 PetriNetUnfolderBase]: 1584/2678 cut-off events. [2024-06-21 15:57:51,838 INFO L125 PetriNetUnfolderBase]: For 77392/77392 co-relation queries the response was YES. [2024-06-21 15:57:51,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17416 conditions, 2678 events. 1584/2678 cut-off events. For 77392/77392 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 15465 event pairs, 314 based on Foata normal form. 14/2688 useless extension candidates. Maximal degree in co-relation 17348. Up to 2074 conditions per place. [2024-06-21 15:57:51,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 180 selfloop transitions, 57 changer transitions 0/246 dead transitions. [2024-06-21 15:57:51,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 246 transitions, 3418 flow [2024-06-21 15:57:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 15:57:51,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-21 15:57:51,859 INFO L175 Difference]: Start difference. First operand has 146 places, 214 transitions, 2666 flow. Second operand 7 states and 195 transitions. [2024-06-21 15:57:51,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 246 transitions, 3418 flow [2024-06-21 15:57:51,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 246 transitions, 3206 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:51,956 INFO L231 Difference]: Finished difference. Result has 147 places, 217 transitions, 2659 flow [2024-06-21 15:57:51,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2454, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2659, PETRI_PLACES=147, PETRI_TRANSITIONS=217} [2024-06-21 15:57:51,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-21 15:57:51,957 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 217 transitions, 2659 flow [2024-06-21 15:57:51,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:51,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:51,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:51,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 15:57:51,958 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:51,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:51,958 INFO L85 PathProgramCache]: Analyzing trace with hash -919306279, now seen corresponding path program 3 times [2024-06-21 15:57:51,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:51,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831479427] [2024-06-21 15:57:51,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:51,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:52,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:52,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831479427] [2024-06-21 15:57:52,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831479427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:52,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:52,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546919931] [2024-06-21 15:57:52,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:52,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:52,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:52,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:52,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:52,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:52,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 217 transitions, 2659 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:52,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:52,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:52,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:52,367 INFO L124 PetriNetUnfolderBase]: 1647/2790 cut-off events. [2024-06-21 15:57:52,367 INFO L125 PetriNetUnfolderBase]: For 82484/82484 co-relation queries the response was YES. [2024-06-21 15:57:52,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18061 conditions, 2790 events. 1647/2790 cut-off events. For 82484/82484 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 16315 event pairs, 325 based on Foata normal form. 14/2800 useless extension candidates. Maximal degree in co-relation 17992. Up to 2175 conditions per place. [2024-06-21 15:57:52,387 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 185 selfloop transitions, 56 changer transitions 0/250 dead transitions. [2024-06-21 15:57:52,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 250 transitions, 3491 flow [2024-06-21 15:57:52,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:52,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-21 15:57:52,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6632653061224489 [2024-06-21 15:57:52,389 INFO L175 Difference]: Start difference. First operand has 147 places, 217 transitions, 2659 flow. Second operand 7 states and 195 transitions. [2024-06-21 15:57:52,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 250 transitions, 3491 flow [2024-06-21 15:57:52,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 250 transitions, 3328 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:52,472 INFO L231 Difference]: Finished difference. Result has 149 places, 220 transitions, 2705 flow [2024-06-21 15:57:52,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2496, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2705, PETRI_PLACES=149, PETRI_TRANSITIONS=220} [2024-06-21 15:57:52,472 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-21 15:57:52,472 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 220 transitions, 2705 flow [2024-06-21 15:57:52,472 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:52,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:52,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:52,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 15:57:52,473 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:52,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:52,473 INFO L85 PathProgramCache]: Analyzing trace with hash -908830759, now seen corresponding path program 4 times [2024-06-21 15:57:52,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:52,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250103938] [2024-06-21 15:57:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:52,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:52,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:52,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:52,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250103938] [2024-06-21 15:57:52,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250103938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:52,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:52,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:57:52,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005790956] [2024-06-21 15:57:52,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:52,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:57:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:57:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:57:52,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:52,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 220 transitions, 2705 flow. Second operand has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:52,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:52,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:52,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:52,962 INFO L124 PetriNetUnfolderBase]: 1777/3028 cut-off events. [2024-06-21 15:57:52,962 INFO L125 PetriNetUnfolderBase]: For 94250/94250 co-relation queries the response was YES. [2024-06-21 15:57:52,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19590 conditions, 3028 events. 1777/3028 cut-off events. For 94250/94250 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18172 event pairs, 320 based on Foata normal form. 14/3038 useless extension candidates. Maximal degree in co-relation 19520. Up to 2012 conditions per place. [2024-06-21 15:57:52,986 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 188 selfloop transitions, 63 changer transitions 0/260 dead transitions. [2024-06-21 15:57:52,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 260 transitions, 3681 flow [2024-06-21 15:57:52,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:52,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 199 transitions. [2024-06-21 15:57:52,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6768707482993197 [2024-06-21 15:57:52,987 INFO L175 Difference]: Start difference. First operand has 149 places, 220 transitions, 2705 flow. Second operand 7 states and 199 transitions. [2024-06-21 15:57:52,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 260 transitions, 3681 flow [2024-06-21 15:57:53,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 260 transitions, 3514 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:53,085 INFO L231 Difference]: Finished difference. Result has 152 places, 225 transitions, 2813 flow [2024-06-21 15:57:53,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2813, PETRI_PLACES=152, PETRI_TRANSITIONS=225} [2024-06-21 15:57:53,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 15:57:53,086 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 225 transitions, 2813 flow [2024-06-21 15:57:53,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.571428571428573) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:53,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:53,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:53,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 15:57:53,086 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:53,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:53,086 INFO L85 PathProgramCache]: Analyzing trace with hash 239261120, now seen corresponding path program 1 times [2024-06-21 15:57:53,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:53,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833713766] [2024-06-21 15:57:53,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:53,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:53,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:53,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:53,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833713766] [2024-06-21 15:57:53,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833713766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:53,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:53,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:53,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6584660] [2024-06-21 15:57:53,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:53,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:53,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:53,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:53,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:53,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:53,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 225 transitions, 2813 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:53,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:53,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:53,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:53,455 INFO L124 PetriNetUnfolderBase]: 1787/3047 cut-off events. [2024-06-21 15:57:53,455 INFO L125 PetriNetUnfolderBase]: For 93195/93195 co-relation queries the response was YES. [2024-06-21 15:57:53,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20247 conditions, 3047 events. 1787/3047 cut-off events. For 93195/93195 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 18332 event pairs, 377 based on Foata normal form. 2/3045 useless extension candidates. Maximal degree in co-relation 20175. Up to 2574 conditions per place. [2024-06-21 15:57:53,481 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 196 selfloop transitions, 37 changer transitions 0/242 dead transitions. [2024-06-21 15:57:53,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 242 transitions, 3447 flow [2024-06-21 15:57:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-06-21 15:57:53,483 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.638095238095238 [2024-06-21 15:57:53,483 INFO L175 Difference]: Start difference. First operand has 152 places, 225 transitions, 2813 flow. Second operand 5 states and 134 transitions. [2024-06-21 15:57:53,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 242 transitions, 3447 flow [2024-06-21 15:57:53,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 242 transitions, 3306 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 15:57:53,603 INFO L231 Difference]: Finished difference. Result has 154 places, 229 transitions, 2829 flow [2024-06-21 15:57:53,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2676, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2829, PETRI_PLACES=154, PETRI_TRANSITIONS=229} [2024-06-21 15:57:53,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-21 15:57:53,603 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 229 transitions, 2829 flow [2024-06-21 15:57:53,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:53,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:53,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:53,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 15:57:53,604 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:53,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:53,604 INFO L85 PathProgramCache]: Analyzing trace with hash 239528030, now seen corresponding path program 2 times [2024-06-21 15:57:53,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:53,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140153896] [2024-06-21 15:57:53,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:53,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:53,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:53,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:53,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:53,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140153896] [2024-06-21 15:57:53,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140153896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:53,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:53,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:53,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341147773] [2024-06-21 15:57:53,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:53,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:53,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:53,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:53,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:53,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:53,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 229 transitions, 2829 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:53,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:53,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:53,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:53,998 INFO L124 PetriNetUnfolderBase]: 1751/2976 cut-off events. [2024-06-21 15:57:53,998 INFO L125 PetriNetUnfolderBase]: For 94048/94048 co-relation queries the response was YES. [2024-06-21 15:57:54,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19786 conditions, 2976 events. 1751/2976 cut-off events. For 94048/94048 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 17823 event pairs, 386 based on Foata normal form. 2/2969 useless extension candidates. Maximal degree in co-relation 19712. Up to 2518 conditions per place. [2024-06-21 15:57:54,021 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 195 selfloop transitions, 34 changer transitions 0/238 dead transitions. [2024-06-21 15:57:54,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 238 transitions, 3309 flow [2024-06-21 15:57:54,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:54,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:54,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-06-21 15:57:54,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 15:57:54,023 INFO L175 Difference]: Start difference. First operand has 154 places, 229 transitions, 2829 flow. Second operand 5 states and 129 transitions. [2024-06-21 15:57:54,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 238 transitions, 3309 flow [2024-06-21 15:57:54,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 238 transitions, 3257 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:54,137 INFO L231 Difference]: Finished difference. Result has 157 places, 229 transitions, 2852 flow [2024-06-21 15:57:54,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2777, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2852, PETRI_PLACES=157, PETRI_TRANSITIONS=229} [2024-06-21 15:57:54,137 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 15:57:54,137 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 229 transitions, 2852 flow [2024-06-21 15:57:54,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:54,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:54,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:54,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 15:57:54,138 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:54,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:54,138 INFO L85 PathProgramCache]: Analyzing trace with hash 239537950, now seen corresponding path program 1 times [2024-06-21 15:57:54,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:54,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706803114] [2024-06-21 15:57:54,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:54,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:54,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:54,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:54,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706803114] [2024-06-21 15:57:54,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706803114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:54,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:54,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:54,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981601923] [2024-06-21 15:57:54,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:54,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:54,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:54,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:54,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:54,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:54,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 229 transitions, 2852 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:54,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:54,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:54,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:54,530 INFO L124 PetriNetUnfolderBase]: 1770/2999 cut-off events. [2024-06-21 15:57:54,531 INFO L125 PetriNetUnfolderBase]: For 101681/101681 co-relation queries the response was YES. [2024-06-21 15:57:54,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20052 conditions, 2999 events. 1770/2999 cut-off events. For 101681/101681 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 17838 event pairs, 381 based on Foata normal form. 8/2998 useless extension candidates. Maximal degree in co-relation 19977. Up to 2523 conditions per place. [2024-06-21 15:57:54,555 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 41 changer transitions 0/244 dead transitions. [2024-06-21 15:57:54,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 244 transitions, 3404 flow [2024-06-21 15:57:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:57:54,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 15:57:54,557 INFO L175 Difference]: Start difference. First operand has 157 places, 229 transitions, 2852 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:57:54,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 244 transitions, 3404 flow [2024-06-21 15:57:54,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 244 transitions, 3268 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:54,700 INFO L231 Difference]: Finished difference. Result has 157 places, 233 transitions, 2869 flow [2024-06-21 15:57:54,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2716, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2869, PETRI_PLACES=157, PETRI_TRANSITIONS=233} [2024-06-21 15:57:54,700 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 15:57:54,701 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 233 transitions, 2869 flow [2024-06-21 15:57:54,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:54,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:54,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:54,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 15:57:54,701 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:54,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:54,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1876271683, now seen corresponding path program 1 times [2024-06-21 15:57:54,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:54,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523874263] [2024-06-21 15:57:54,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:54,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:54,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:54,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523874263] [2024-06-21 15:57:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523874263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:54,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764105386] [2024-06-21 15:57:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:54,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:54,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:54,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:54,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 233 transitions, 2869 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:54,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:54,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:54,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:55,165 INFO L124 PetriNetUnfolderBase]: 1757/2995 cut-off events. [2024-06-21 15:57:55,165 INFO L125 PetriNetUnfolderBase]: For 99917/99917 co-relation queries the response was YES. [2024-06-21 15:57:55,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20161 conditions, 2995 events. 1757/2995 cut-off events. For 99917/99917 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17819 event pairs, 350 based on Foata normal form. 2/2995 useless extension candidates. Maximal degree in co-relation 20086. Up to 2597 conditions per place. [2024-06-21 15:57:55,190 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 18 changer transitions 0/259 dead transitions. [2024-06-21 15:57:55,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 259 transitions, 3435 flow [2024-06-21 15:57:55,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:57:55,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:57:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:57:55,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 15:57:55,191 INFO L175 Difference]: Start difference. First operand has 157 places, 233 transitions, 2869 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:57:55,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 259 transitions, 3435 flow [2024-06-21 15:57:55,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3302 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:55,297 INFO L231 Difference]: Finished difference. Result has 160 places, 233 transitions, 2780 flow [2024-06-21 15:57:55,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2736, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2780, PETRI_PLACES=160, PETRI_TRANSITIONS=233} [2024-06-21 15:57:55,297 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 15:57:55,297 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 233 transitions, 2780 flow [2024-06-21 15:57:55,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:55,298 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:55,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:55,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 15:57:55,298 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:55,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash -61543689, now seen corresponding path program 2 times [2024-06-21 15:57:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:55,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235791642] [2024-06-21 15:57:55,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:55,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:55,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:55,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:55,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235791642] [2024-06-21 15:57:55,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235791642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:55,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:55,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:55,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375075085] [2024-06-21 15:57:55,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:55,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:55,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:55,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:55,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:55,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:55,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 233 transitions, 2780 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:55,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:55,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:55,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:55,669 INFO L124 PetriNetUnfolderBase]: 1775/3019 cut-off events. [2024-06-21 15:57:55,669 INFO L125 PetriNetUnfolderBase]: For 104874/104874 co-relation queries the response was YES. [2024-06-21 15:57:55,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20226 conditions, 3019 events. 1775/3019 cut-off events. For 104874/104874 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17992 event pairs, 361 based on Foata normal form. 2/3011 useless extension candidates. Maximal degree in co-relation 20150. Up to 2407 conditions per place. [2024-06-21 15:57:55,693 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 72 changer transitions 0/259 dead transitions. [2024-06-21 15:57:55,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 259 transitions, 3644 flow [2024-06-21 15:57:55,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:55,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:55,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-21 15:57:55,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6468253968253969 [2024-06-21 15:57:55,695 INFO L175 Difference]: Start difference. First operand has 160 places, 233 transitions, 2780 flow. Second operand 6 states and 163 transitions. [2024-06-21 15:57:55,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 259 transitions, 3644 flow [2024-06-21 15:57:55,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 259 transitions, 3608 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:57:55,807 INFO L231 Difference]: Finished difference. Result has 160 places, 240 transitions, 2999 flow [2024-06-21 15:57:55,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2999, PETRI_PLACES=160, PETRI_TRANSITIONS=240} [2024-06-21 15:57:55,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-21 15:57:55,807 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 240 transitions, 2999 flow [2024-06-21 15:57:55,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:55,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:55,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:55,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 15:57:55,808 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:55,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:55,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1179525671, now seen corresponding path program 3 times [2024-06-21 15:57:55,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:55,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694980597] [2024-06-21 15:57:55,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:55,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:55,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:55,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694980597] [2024-06-21 15:57:55,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694980597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:55,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:55,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:55,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088911645] [2024-06-21 15:57:55,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:55,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:55,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:55,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:55,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:55,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:55,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 240 transitions, 2999 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:55,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:55,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:55,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:56,195 INFO L124 PetriNetUnfolderBase]: 1763/2979 cut-off events. [2024-06-21 15:57:56,195 INFO L125 PetriNetUnfolderBase]: For 109935/109935 co-relation queries the response was YES. [2024-06-21 15:57:56,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20301 conditions, 2979 events. 1763/2979 cut-off events. For 109935/109935 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17756 event pairs, 397 based on Foata normal form. 4/2969 useless extension candidates. Maximal degree in co-relation 20224. Up to 2399 conditions per place. [2024-06-21 15:57:56,219 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 65 changer transitions 0/252 dead transitions. [2024-06-21 15:57:56,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 252 transitions, 3661 flow [2024-06-21 15:57:56,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:56,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:57:56,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 15:57:56,221 INFO L175 Difference]: Start difference. First operand has 160 places, 240 transitions, 2999 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:57:56,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 252 transitions, 3661 flow [2024-06-21 15:57:56,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 252 transitions, 3559 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 15:57:56,370 INFO L231 Difference]: Finished difference. Result has 164 places, 240 transitions, 3035 flow [2024-06-21 15:57:56,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2897, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3035, PETRI_PLACES=164, PETRI_TRANSITIONS=240} [2024-06-21 15:57:56,370 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 15:57:56,370 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 240 transitions, 3035 flow [2024-06-21 15:57:56,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:56,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:56,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:56,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 15:57:56,371 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:56,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:56,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1006188873, now seen corresponding path program 1 times [2024-06-21 15:57:56,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:56,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484412552] [2024-06-21 15:57:56,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:56,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484412552] [2024-06-21 15:57:56,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484412552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:56,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:56,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:57:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787818748] [2024-06-21 15:57:56,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:56,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:57:56,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:57:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:57:56,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:56,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 240 transitions, 3035 flow. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:56,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:56,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:56,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:56,783 INFO L124 PetriNetUnfolderBase]: 1768/3013 cut-off events. [2024-06-21 15:57:56,784 INFO L125 PetriNetUnfolderBase]: For 111484/111484 co-relation queries the response was YES. [2024-06-21 15:57:56,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20520 conditions, 3013 events. 1768/3013 cut-off events. For 111484/111484 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17976 event pairs, 349 based on Foata normal form. 1/3012 useless extension candidates. Maximal degree in co-relation 20442. Up to 2624 conditions per place. [2024-06-21 15:57:56,810 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 231 selfloop transitions, 20 changer transitions 0/260 dead transitions. [2024-06-21 15:57:56,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 260 transitions, 3691 flow [2024-06-21 15:57:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:57:56,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:57:56,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 15:57:56,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-21 15:57:56,811 INFO L175 Difference]: Start difference. First operand has 164 places, 240 transitions, 3035 flow. Second operand 6 states and 154 transitions. [2024-06-21 15:57:56,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 260 transitions, 3691 flow [2024-06-21 15:57:56,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 260 transitions, 3417 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 15:57:56,947 INFO L231 Difference]: Finished difference. Result has 162 places, 243 transitions, 2843 flow [2024-06-21 15:57:56,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2761, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2843, PETRI_PLACES=162, PETRI_TRANSITIONS=243} [2024-06-21 15:57:56,949 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 15:57:56,949 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 243 transitions, 2843 flow [2024-06-21 15:57:56,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 6 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:56,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:56,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:56,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 15:57:56,950 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:56,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:56,950 INFO L85 PathProgramCache]: Analyzing trace with hash -994970397, now seen corresponding path program 2 times [2024-06-21 15:57:56,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:56,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559191567] [2024-06-21 15:57:56,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:56,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:56,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:57,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:57,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:57,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559191567] [2024-06-21 15:57:57,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559191567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:57,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:57,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 15:57:57,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233903440] [2024-06-21 15:57:57,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:57,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 15:57:57,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:57,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 15:57:57,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 15:57:57,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:57,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 243 transitions, 2843 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:57,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:57,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:57,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:57,317 INFO L124 PetriNetUnfolderBase]: 1765/3001 cut-off events. [2024-06-21 15:57:57,317 INFO L125 PetriNetUnfolderBase]: For 113627/113627 co-relation queries the response was YES. [2024-06-21 15:57:57,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20188 conditions, 3001 events. 1765/3001 cut-off events. For 113627/113627 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 17855 event pairs, 356 based on Foata normal form. 1/2995 useless extension candidates. Maximal degree in co-relation 20112. Up to 2621 conditions per place. [2024-06-21 15:57:57,340 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 223 selfloop transitions, 20 changer transitions 0/252 dead transitions. [2024-06-21 15:57:57,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 252 transitions, 3351 flow [2024-06-21 15:57:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 15:57:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 15:57:57,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 15:57:57,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6047619047619047 [2024-06-21 15:57:57,341 INFO L175 Difference]: Start difference. First operand has 162 places, 243 transitions, 2843 flow. Second operand 5 states and 127 transitions. [2024-06-21 15:57:57,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 252 transitions, 3351 flow [2024-06-21 15:57:57,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 252 transitions, 3301 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:57,478 INFO L231 Difference]: Finished difference. Result has 163 places, 243 transitions, 2839 flow [2024-06-21 15:57:57,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2793, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2839, PETRI_PLACES=163, PETRI_TRANSITIONS=243} [2024-06-21 15:57:57,479 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-21 15:57:57,479 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 243 transitions, 2839 flow [2024-06-21 15:57:57,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:57,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:57,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 15:57:57,479 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:57,480 INFO L85 PathProgramCache]: Analyzing trace with hash -2097402408, now seen corresponding path program 1 times [2024-06-21 15:57:57,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:57,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635980630] [2024-06-21 15:57:57,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:57,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:57,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:57,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:57,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:57,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635980630] [2024-06-21 15:57:57,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635980630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:57,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:57,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:57,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429871070] [2024-06-21 15:57:57,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:57,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:57,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:57,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:57,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:57,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:57,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 243 transitions, 2839 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:57,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:57,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:57,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:58,018 INFO L124 PetriNetUnfolderBase]: 1965/3334 cut-off events. [2024-06-21 15:57:58,018 INFO L125 PetriNetUnfolderBase]: For 153693/153693 co-relation queries the response was YES. [2024-06-21 15:57:58,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23539 conditions, 3334 events. 1965/3334 cut-off events. For 153693/153693 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20347 event pairs, 312 based on Foata normal form. 18/3348 useless extension candidates. Maximal degree in co-relation 23462. Up to 2459 conditions per place. [2024-06-21 15:57:58,047 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 256 selfloop transitions, 30 changer transitions 0/295 dead transitions. [2024-06-21 15:57:58,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 295 transitions, 3927 flow [2024-06-21 15:57:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:58,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:58,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 241 transitions. [2024-06-21 15:57:58,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375661375661376 [2024-06-21 15:57:58,049 INFO L175 Difference]: Start difference. First operand has 163 places, 243 transitions, 2839 flow. Second operand 9 states and 241 transitions. [2024-06-21 15:57:58,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 295 transitions, 3927 flow [2024-06-21 15:57:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 295 transitions, 3871 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 15:57:58,181 INFO L231 Difference]: Finished difference. Result has 168 places, 246 transitions, 2966 flow [2024-06-21 15:57:58,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2966, PETRI_PLACES=168, PETRI_TRANSITIONS=246} [2024-06-21 15:57:58,181 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-21 15:57:58,182 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 246 transitions, 2966 flow [2024-06-21 15:57:58,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:58,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:58,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:58,182 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 15:57:58,182 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:58,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:58,182 INFO L85 PathProgramCache]: Analyzing trace with hash 648136152, now seen corresponding path program 2 times [2024-06-21 15:57:58,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:58,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374717651] [2024-06-21 15:57:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:58,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:58,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374717651] [2024-06-21 15:57:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374717651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:58,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:58,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:58,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806530217] [2024-06-21 15:57:58,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:58,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:58,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:58,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:58,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 246 transitions, 2966 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:58,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:58,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:58,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:58,725 INFO L124 PetriNetUnfolderBase]: 2072/3529 cut-off events. [2024-06-21 15:57:58,725 INFO L125 PetriNetUnfolderBase]: For 173596/173596 co-relation queries the response was YES. [2024-06-21 15:57:58,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25626 conditions, 3529 events. 2072/3529 cut-off events. For 173596/173596 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 21760 event pairs, 424 based on Foata normal form. 18/3545 useless extension candidates. Maximal degree in co-relation 25549. Up to 2797 conditions per place. [2024-06-21 15:57:58,755 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 30 changer transitions 0/294 dead transitions. [2024-06-21 15:57:58,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 294 transitions, 4056 flow [2024-06-21 15:57:58,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-21 15:57:58,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 15:57:58,756 INFO L175 Difference]: Start difference. First operand has 168 places, 246 transitions, 2966 flow. Second operand 9 states and 237 transitions. [2024-06-21 15:57:58,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 294 transitions, 4056 flow [2024-06-21 15:57:58,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 294 transitions, 3947 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:58,919 INFO L231 Difference]: Finished difference. Result has 172 places, 250 transitions, 3096 flow [2024-06-21 15:57:58,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2865, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3096, PETRI_PLACES=172, PETRI_TRANSITIONS=250} [2024-06-21 15:57:58,919 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-21 15:57:58,919 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 250 transitions, 3096 flow [2024-06-21 15:57:58,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:58,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:58,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:58,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 15:57:58,920 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:58,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash 652897752, now seen corresponding path program 3 times [2024-06-21 15:57:58,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:58,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437754989] [2024-06-21 15:57:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:58,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:58,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:58,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437754989] [2024-06-21 15:57:58,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437754989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:58,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:58,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:58,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569359266] [2024-06-21 15:57:58,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:58,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:58,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:58,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:58,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:59,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:59,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 250 transitions, 3096 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:59,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:59,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:59,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:57:59,521 INFO L124 PetriNetUnfolderBase]: 2026/3459 cut-off events. [2024-06-21 15:57:59,522 INFO L125 PetriNetUnfolderBase]: For 166748/166748 co-relation queries the response was YES. [2024-06-21 15:57:59,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24001 conditions, 3459 events. 2026/3459 cut-off events. For 166748/166748 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 21306 event pairs, 421 based on Foata normal form. 24/3481 useless extension candidates. Maximal degree in co-relation 23922. Up to 2898 conditions per place. [2024-06-21 15:57:59,547 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 254 selfloop transitions, 26 changer transitions 0/289 dead transitions. [2024-06-21 15:57:59,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 289 transitions, 3852 flow [2024-06-21 15:57:59,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:57:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:57:59,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 15:57:59,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-21 15:57:59,548 INFO L175 Difference]: Start difference. First operand has 172 places, 250 transitions, 3096 flow. Second operand 9 states and 232 transitions. [2024-06-21 15:57:59,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 289 transitions, 3852 flow [2024-06-21 15:57:59,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 289 transitions, 3698 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-21 15:57:59,744 INFO L231 Difference]: Finished difference. Result has 176 places, 250 transitions, 3002 flow [2024-06-21 15:57:59,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3002, PETRI_PLACES=176, PETRI_TRANSITIONS=250} [2024-06-21 15:57:59,744 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 15:57:59,744 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 250 transitions, 3002 flow [2024-06-21 15:57:59,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:59,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:57:59,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:57:59,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 15:57:59,745 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:57:59,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:57:59,745 INFO L85 PathProgramCache]: Analyzing trace with hash 39338618, now seen corresponding path program 4 times [2024-06-21 15:57:59,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:57:59,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491307666] [2024-06-21 15:57:59,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:57:59,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:57:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:57:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:57:59,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:57:59,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491307666] [2024-06-21 15:57:59,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491307666] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:57:59,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:57:59,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:57:59,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768202355] [2024-06-21 15:57:59,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:57:59,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:57:59,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:57:59,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:57:59,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:57:59,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:57:59,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 250 transitions, 3002 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:57:59,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:57:59,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:57:59,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:00,315 INFO L124 PetriNetUnfolderBase]: 2188/3721 cut-off events. [2024-06-21 15:58:00,315 INFO L125 PetriNetUnfolderBase]: For 201393/201393 co-relation queries the response was YES. [2024-06-21 15:58:00,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24929 conditions, 3721 events. 2188/3721 cut-off events. For 201393/201393 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 23156 event pairs, 472 based on Foata normal form. 50/3756 useless extension candidates. Maximal degree in co-relation 24848. Up to 2553 conditions per place. [2024-06-21 15:58:00,348 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 155 selfloop transitions, 124 changer transitions 3/291 dead transitions. [2024-06-21 15:58:00,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 291 transitions, 4028 flow [2024-06-21 15:58:00,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 15:58:00,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 15:58:00,350 INFO L175 Difference]: Start difference. First operand has 176 places, 250 transitions, 3002 flow. Second operand 8 states and 229 transitions. [2024-06-21 15:58:00,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 291 transitions, 4028 flow [2024-06-21 15:58:00,573 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 291 transitions, 3968 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 15:58:00,576 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3279 flow [2024-06-21 15:58:00,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2942, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3279, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-06-21 15:58:00,577 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-21 15:58:00,577 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3279 flow [2024-06-21 15:58:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:00,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:00,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:00,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 15:58:00,578 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:00,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:00,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1727387422, now seen corresponding path program 5 times [2024-06-21 15:58:00,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:00,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064407887] [2024-06-21 15:58:00,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:00,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:00,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:00,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:00,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064407887] [2024-06-21 15:58:00,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064407887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:00,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:00,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:00,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712891234] [2024-06-21 15:58:00,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:00,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:00,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:00,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:00,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:00,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:00,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3279 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:00,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:00,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:00,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:01,246 INFO L124 PetriNetUnfolderBase]: 2566/4373 cut-off events. [2024-06-21 15:58:01,246 INFO L125 PetriNetUnfolderBase]: For 264593/264593 co-relation queries the response was YES. [2024-06-21 15:58:01,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31152 conditions, 4373 events. 2566/4373 cut-off events. For 264593/264593 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 27960 event pairs, 585 based on Foata normal form. 42/4400 useless extension candidates. Maximal degree in co-relation 31070. Up to 2519 conditions per place. [2024-06-21 15:58:01,285 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 129 changer transitions 4/302 dead transitions. [2024-06-21 15:58:01,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 302 transitions, 4619 flow [2024-06-21 15:58:01,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:01,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:01,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-21 15:58:01,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6994047619047619 [2024-06-21 15:58:01,287 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3279 flow. Second operand 8 states and 235 transitions. [2024-06-21 15:58:01,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 302 transitions, 4619 flow [2024-06-21 15:58:01,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 302 transitions, 4307 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:01,624 INFO L231 Difference]: Finished difference. Result has 178 places, 254 transitions, 3405 flow [2024-06-21 15:58:01,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2967, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3405, PETRI_PLACES=178, PETRI_TRANSITIONS=254} [2024-06-21 15:58:01,624 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 15:58:01,625 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 254 transitions, 3405 flow [2024-06-21 15:58:01,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:01,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:01,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:01,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 15:58:01,625 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:01,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:01,626 INFO L85 PathProgramCache]: Analyzing trace with hash 2129759308, now seen corresponding path program 6 times [2024-06-21 15:58:01,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:01,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575786053] [2024-06-21 15:58:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:01,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:01,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575786053] [2024-06-21 15:58:01,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575786053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:01,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:01,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585043439] [2024-06-21 15:58:01,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:01,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:01,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:01,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:01,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 254 transitions, 3405 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:01,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:01,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:01,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:02,306 INFO L124 PetriNetUnfolderBase]: 2439/4170 cut-off events. [2024-06-21 15:58:02,306 INFO L125 PetriNetUnfolderBase]: For 229539/229539 co-relation queries the response was YES. [2024-06-21 15:58:02,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27855 conditions, 4170 events. 2439/4170 cut-off events. For 229539/229539 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26593 event pairs, 595 based on Foata normal form. 50/4205 useless extension candidates. Maximal degree in co-relation 27772. Up to 2982 conditions per place. [2024-06-21 15:58:02,342 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 124 changer transitions 3/294 dead transitions. [2024-06-21 15:58:02,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 294 transitions, 4455 flow [2024-06-21 15:58:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:02,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:02,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 15:58:02,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 15:58:02,343 INFO L175 Difference]: Start difference. First operand has 178 places, 254 transitions, 3405 flow. Second operand 8 states and 229 transitions. [2024-06-21 15:58:02,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 294 transitions, 4455 flow [2024-06-21 15:58:02,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 294 transitions, 4071 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:02,600 INFO L231 Difference]: Finished difference. Result has 181 places, 253 transitions, 3269 flow [2024-06-21 15:58:02,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3269, PETRI_PLACES=181, PETRI_TRANSITIONS=253} [2024-06-21 15:58:02,601 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 138 predicate places. [2024-06-21 15:58:02,601 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 253 transitions, 3269 flow [2024-06-21 15:58:02,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:02,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:02,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:02,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 15:58:02,601 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:02,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1975539020, now seen corresponding path program 1 times [2024-06-21 15:58:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:02,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282500686] [2024-06-21 15:58:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:02,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:02,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:02,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:02,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282500686] [2024-06-21 15:58:02,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282500686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:02,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:02,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:02,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915062791] [2024-06-21 15:58:02,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:02,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:02,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:02,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:02,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:02,714 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:02,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 253 transitions, 3269 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:02,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:02,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:02,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:03,370 INFO L124 PetriNetUnfolderBase]: 2731/4667 cut-off events. [2024-06-21 15:58:03,371 INFO L125 PetriNetUnfolderBase]: For 265050/265050 co-relation queries the response was YES. [2024-06-21 15:58:03,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31122 conditions, 4667 events. 2731/4667 cut-off events. For 265050/265050 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30395 event pairs, 627 based on Foata normal form. 42/4691 useless extension candidates. Maximal degree in co-relation 31038. Up to 2561 conditions per place. [2024-06-21 15:58:03,412 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 158 selfloop transitions, 132 changer transitions 4/303 dead transitions. [2024-06-21 15:58:03,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 303 transitions, 4605 flow [2024-06-21 15:58:03,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:03,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:03,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 234 transitions. [2024-06-21 15:58:03,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6964285714285714 [2024-06-21 15:58:03,413 INFO L175 Difference]: Start difference. First operand has 181 places, 253 transitions, 3269 flow. Second operand 8 states and 234 transitions. [2024-06-21 15:58:03,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 303 transitions, 4605 flow [2024-06-21 15:58:03,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 303 transitions, 4299 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:03,798 INFO L231 Difference]: Finished difference. Result has 182 places, 255 transitions, 3358 flow [2024-06-21 15:58:03,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3358, PETRI_PLACES=182, PETRI_TRANSITIONS=255} [2024-06-21 15:58:03,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-21 15:58:03,798 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 255 transitions, 3358 flow [2024-06-21 15:58:03,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:03,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:03,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:03,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 15:58:03,799 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:03,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:03,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1570618147, now seen corresponding path program 1 times [2024-06-21 15:58:03,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:03,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992481796] [2024-06-21 15:58:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:03,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:03,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992481796] [2024-06-21 15:58:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992481796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:03,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:03,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:03,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516958176] [2024-06-21 15:58:03,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:03,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:03,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:03,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:03,885 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 255 transitions, 3358 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:03,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:03,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:03,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:04,393 INFO L124 PetriNetUnfolderBase]: 2719/4646 cut-off events. [2024-06-21 15:58:04,393 INFO L125 PetriNetUnfolderBase]: For 230863/230863 co-relation queries the response was YES. [2024-06-21 15:58:04,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30809 conditions, 4646 events. 2719/4646 cut-off events. For 230863/230863 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 30288 event pairs, 748 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30724. Up to 4084 conditions per place. [2024-06-21 15:58:04,433 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 55 changer transitions 0/276 dead transitions. [2024-06-21 15:58:04,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 276 transitions, 4119 flow [2024-06-21 15:58:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:04,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:04,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 15:58:04,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 15:58:04,434 INFO L175 Difference]: Start difference. First operand has 182 places, 255 transitions, 3358 flow. Second operand 6 states and 159 transitions. [2024-06-21 15:58:04,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 276 transitions, 4119 flow [2024-06-21 15:58:04,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 276 transitions, 3859 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:04,751 INFO L231 Difference]: Finished difference. Result has 185 places, 262 transitions, 3367 flow [2024-06-21 15:58:04,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3367, PETRI_PLACES=185, PETRI_TRANSITIONS=262} [2024-06-21 15:58:04,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 15:58:04,752 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 262 transitions, 3367 flow [2024-06-21 15:58:04,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:04,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:04,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:04,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 15:58:04,752 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:04,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:04,753 INFO L85 PathProgramCache]: Analyzing trace with hash -865336095, now seen corresponding path program 2 times [2024-06-21 15:58:04,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:04,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659840262] [2024-06-21 15:58:04,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:04,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:04,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:04,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:04,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659840262] [2024-06-21 15:58:04,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659840262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:04,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:04,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:04,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903118877] [2024-06-21 15:58:04,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:04,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:04,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:04,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:04,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:04,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:04,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 262 transitions, 3367 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:04,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:04,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:04,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:05,326 INFO L124 PetriNetUnfolderBase]: 2737/4654 cut-off events. [2024-06-21 15:58:05,326 INFO L125 PetriNetUnfolderBase]: For 233643/233643 co-relation queries the response was YES. [2024-06-21 15:58:05,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30909 conditions, 4654 events. 2737/4654 cut-off events. For 233643/233643 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 30240 event pairs, 788 based on Foata normal form. 2/4642 useless extension candidates. Maximal degree in co-relation 30821. Up to 4004 conditions per place. [2024-06-21 15:58:05,371 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 78 changer transitions 0/282 dead transitions. [2024-06-21 15:58:05,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 282 transitions, 4342 flow [2024-06-21 15:58:05,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:58:05,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 15:58:05,372 INFO L175 Difference]: Start difference. First operand has 185 places, 262 transitions, 3367 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:58:05,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 282 transitions, 4342 flow [2024-06-21 15:58:05,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 282 transitions, 4244 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:05,811 INFO L231 Difference]: Finished difference. Result has 187 places, 269 transitions, 3550 flow [2024-06-21 15:58:05,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3275, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3550, PETRI_PLACES=187, PETRI_TRANSITIONS=269} [2024-06-21 15:58:05,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 15:58:05,812 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 269 transitions, 3550 flow [2024-06-21 15:58:05,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:05,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:05,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:05,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 15:58:05,813 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:05,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:05,813 INFO L85 PathProgramCache]: Analyzing trace with hash -864920385, now seen corresponding path program 3 times [2024-06-21 15:58:05,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:05,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785578725] [2024-06-21 15:58:05,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:05,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:05,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:05,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:05,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785578725] [2024-06-21 15:58:05,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785578725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:05,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:05,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:05,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257875870] [2024-06-21 15:58:05,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:05,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:05,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:05,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:05,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:05,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:05,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 269 transitions, 3550 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:05,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:05,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:05,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:06,475 INFO L124 PetriNetUnfolderBase]: 2731/4647 cut-off events. [2024-06-21 15:58:06,476 INFO L125 PetriNetUnfolderBase]: For 232301/232301 co-relation queries the response was YES. [2024-06-21 15:58:06,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30852 conditions, 4647 events. 2731/4647 cut-off events. For 232301/232301 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 30188 event pairs, 787 based on Foata normal form. 2/4635 useless extension candidates. Maximal degree in co-relation 30764. Up to 3999 conditions per place. [2024-06-21 15:58:06,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 191 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-21 15:58:06,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 282 transitions, 4414 flow [2024-06-21 15:58:06,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:06,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:06,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-21 15:58:06,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 15:58:06,514 INFO L175 Difference]: Start difference. First operand has 187 places, 269 transitions, 3550 flow. Second operand 6 states and 158 transitions. [2024-06-21 15:58:06,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 282 transitions, 4414 flow [2024-06-21 15:58:06,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 282 transitions, 4256 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:06,883 INFO L231 Difference]: Finished difference. Result has 191 places, 269 transitions, 3563 flow [2024-06-21 15:58:06,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3563, PETRI_PLACES=191, PETRI_TRANSITIONS=269} [2024-06-21 15:58:06,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 15:58:06,883 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 269 transitions, 3563 flow [2024-06-21 15:58:06,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:06,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:06,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:06,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 15:58:06,884 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:06,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:06,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1115459146, now seen corresponding path program 7 times [2024-06-21 15:58:06,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:06,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653491837] [2024-06-21 15:58:06,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:06,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:06,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:06,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653491837] [2024-06-21 15:58:06,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653491837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:06,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:06,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:06,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932693948] [2024-06-21 15:58:06,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:06,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:06,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:06,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:06,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:06,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:06,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 269 transitions, 3563 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:06,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:06,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:06,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:07,606 INFO L124 PetriNetUnfolderBase]: 2893/4948 cut-off events. [2024-06-21 15:58:07,606 INFO L125 PetriNetUnfolderBase]: For 301331/301331 co-relation queries the response was YES. [2024-06-21 15:58:07,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32560 conditions, 4948 events. 2893/4948 cut-off events. For 301331/301331 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32664 event pairs, 831 based on Foata normal form. 50/4992 useless extension candidates. Maximal degree in co-relation 32471. Up to 3710 conditions per place. [2024-06-21 15:58:07,652 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 175 selfloop transitions, 119 changer transitions 3/306 dead transitions. [2024-06-21 15:58:07,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 306 transitions, 4551 flow [2024-06-21 15:58:07,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:07,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:07,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-21 15:58:07,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6696428571428571 [2024-06-21 15:58:07,653 INFO L175 Difference]: Start difference. First operand has 191 places, 269 transitions, 3563 flow. Second operand 8 states and 225 transitions. [2024-06-21 15:58:07,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 306 transitions, 4551 flow [2024-06-21 15:58:08,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 306 transitions, 4348 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:08,080 INFO L231 Difference]: Finished difference. Result has 194 places, 270 transitions, 3695 flow [2024-06-21 15:58:08,080 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3360, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3695, PETRI_PLACES=194, PETRI_TRANSITIONS=270} [2024-06-21 15:58:08,080 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 151 predicate places. [2024-06-21 15:58:08,080 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 270 transitions, 3695 flow [2024-06-21 15:58:08,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:08,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:08,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:08,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 15:58:08,081 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:08,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:08,082 INFO L85 PathProgramCache]: Analyzing trace with hash -572863016, now seen corresponding path program 8 times [2024-06-21 15:58:08,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:08,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054248454] [2024-06-21 15:58:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:08,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:08,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:08,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:08,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054248454] [2024-06-21 15:58:08,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054248454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:08,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:08,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:08,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040057425] [2024-06-21 15:58:08,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:08,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:08,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:08,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:08,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 270 transitions, 3695 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:08,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:08,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:08,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:08,793 INFO L124 PetriNetUnfolderBase]: 3045/5214 cut-off events. [2024-06-21 15:58:08,793 INFO L125 PetriNetUnfolderBase]: For 323828/323828 co-relation queries the response was YES. [2024-06-21 15:58:08,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34550 conditions, 5214 events. 3045/5214 cut-off events. For 323828/323828 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 34734 event pairs, 886 based on Foata normal form. 50/5258 useless extension candidates. Maximal degree in co-relation 34460. Up to 3966 conditions per place. [2024-06-21 15:58:08,843 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 119 changer transitions 3/307 dead transitions. [2024-06-21 15:58:08,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 307 transitions, 4693 flow [2024-06-21 15:58:08,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:08,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:08,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 15:58:08,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 15:58:08,844 INFO L175 Difference]: Start difference. First operand has 194 places, 270 transitions, 3695 flow. Second operand 8 states and 224 transitions. [2024-06-21 15:58:08,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 307 transitions, 4693 flow [2024-06-21 15:58:09,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 307 transitions, 4381 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:09,286 INFO L231 Difference]: Finished difference. Result has 196 places, 271 transitions, 3722 flow [2024-06-21 15:58:09,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3383, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3722, PETRI_PLACES=196, PETRI_TRANSITIONS=271} [2024-06-21 15:58:09,286 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-21 15:58:09,287 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 271 transitions, 3722 flow [2024-06-21 15:58:09,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:09,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:09,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:09,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 15:58:09,287 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:09,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:09,288 INFO L85 PathProgramCache]: Analyzing trace with hash 771486218, now seen corresponding path program 9 times [2024-06-21 15:58:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624465669] [2024-06-21 15:58:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:09,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:09,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:09,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624465669] [2024-06-21 15:58:09,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624465669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:09,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:09,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:09,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655657934] [2024-06-21 15:58:09,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:09,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:09,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:09,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:09,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:09,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:09,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 271 transitions, 3722 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:09,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:09,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:09,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:10,107 INFO L124 PetriNetUnfolderBase]: 3398/5817 cut-off events. [2024-06-21 15:58:10,107 INFO L125 PetriNetUnfolderBase]: For 391484/391484 co-relation queries the response was YES. [2024-06-21 15:58:10,144 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39756 conditions, 5817 events. 3398/5817 cut-off events. For 391484/391484 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 39515 event pairs, 971 based on Foata normal form. 42/5853 useless extension candidates. Maximal degree in co-relation 39665. Up to 3646 conditions per place. [2024-06-21 15:58:10,163 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 126 changer transitions 4/318 dead transitions. [2024-06-21 15:58:10,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 318 transitions, 5064 flow [2024-06-21 15:58:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:10,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:10,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 230 transitions. [2024-06-21 15:58:10,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6845238095238095 [2024-06-21 15:58:10,164 INFO L175 Difference]: Start difference. First operand has 196 places, 271 transitions, 3722 flow. Second operand 8 states and 230 transitions. [2024-06-21 15:58:10,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 318 transitions, 5064 flow [2024-06-21 15:58:10,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 318 transitions, 4748 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:10,739 INFO L231 Difference]: Finished difference. Result has 198 places, 274 transitions, 3861 flow [2024-06-21 15:58:10,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3406, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3861, PETRI_PLACES=198, PETRI_TRANSITIONS=274} [2024-06-21 15:58:10,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-21 15:58:10,740 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 274 transitions, 3861 flow [2024-06-21 15:58:10,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:10,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:10,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:10,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 15:58:10,741 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:10,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:10,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1644488182, now seen corresponding path program 10 times [2024-06-21 15:58:10,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:10,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141139950] [2024-06-21 15:58:10,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:10,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:10,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:10,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:10,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141139950] [2024-06-21 15:58:10,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141139950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:10,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:10,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:10,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35750987] [2024-06-21 15:58:10,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:10,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:10,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:10,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:10,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:10,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:10,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 274 transitions, 3861 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:10,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:10,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:10,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:11,563 INFO L124 PetriNetUnfolderBase]: 3296/5663 cut-off events. [2024-06-21 15:58:11,563 INFO L125 PetriNetUnfolderBase]: For 343944/343944 co-relation queries the response was YES. [2024-06-21 15:58:11,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36245 conditions, 5663 events. 3296/5663 cut-off events. For 343944/343944 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 38404 event pairs, 1008 based on Foata normal form. 50/5707 useless extension candidates. Maximal degree in co-relation 36153. Up to 4353 conditions per place. [2024-06-21 15:58:11,615 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 118 changer transitions 0/310 dead transitions. [2024-06-21 15:58:11,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 310 transitions, 4881 flow [2024-06-21 15:58:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 224 transitions. [2024-06-21 15:58:11,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-06-21 15:58:11,616 INFO L175 Difference]: Start difference. First operand has 198 places, 274 transitions, 3861 flow. Second operand 8 states and 224 transitions. [2024-06-21 15:58:11,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 310 transitions, 4881 flow [2024-06-21 15:58:12,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 310 transitions, 4558 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:12,212 INFO L231 Difference]: Finished difference. Result has 202 places, 274 transitions, 3783 flow [2024-06-21 15:58:12,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3783, PETRI_PLACES=202, PETRI_TRANSITIONS=274} [2024-06-21 15:58:12,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 15:58:12,213 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 274 transitions, 3783 flow [2024-06-21 15:58:12,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:12,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:12,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:12,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 15:58:12,214 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:12,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:12,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1398852310, now seen corresponding path program 2 times [2024-06-21 15:58:12,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:12,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945905843] [2024-06-21 15:58:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:12,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:12,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:12,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:12,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945905843] [2024-06-21 15:58:12,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945905843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:12,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:12,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:12,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874943372] [2024-06-21 15:58:12,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:12,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:12,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:12,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:12,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:12,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:12,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 274 transitions, 3783 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:12,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:12,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:12,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:13,119 INFO L124 PetriNetUnfolderBase]: 3425/5912 cut-off events. [2024-06-21 15:58:13,119 INFO L125 PetriNetUnfolderBase]: For 336010/336010 co-relation queries the response was YES. [2024-06-21 15:58:13,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37028 conditions, 5912 events. 3425/5912 cut-off events. For 336010/336010 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 40704 event pairs, 1010 based on Foata normal form. 42/5948 useless extension candidates. Maximal degree in co-relation 36934. Up to 4115 conditions per place. [2024-06-21 15:58:13,179 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 180 selfloop transitions, 122 changer transitions 6/317 dead transitions. [2024-06-21 15:58:13,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 317 transitions, 4853 flow [2024-06-21 15:58:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:13,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:13,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 15:58:13,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 15:58:13,184 INFO L175 Difference]: Start difference. First operand has 202 places, 274 transitions, 3783 flow. Second operand 8 states and 229 transitions. [2024-06-21 15:58:13,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 317 transitions, 4853 flow [2024-06-21 15:58:13,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 317 transitions, 4593 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:13,777 INFO L231 Difference]: Finished difference. Result has 203 places, 275 transitions, 3867 flow [2024-06-21 15:58:13,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3523, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3867, PETRI_PLACES=203, PETRI_TRANSITIONS=275} [2024-06-21 15:58:13,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-21 15:58:13,778 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 275 transitions, 3867 flow [2024-06-21 15:58:13,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:13,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:13,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:13,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 15:58:13,778 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:13,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:13,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1644242228, now seen corresponding path program 3 times [2024-06-21 15:58:13,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708182348] [2024-06-21 15:58:13,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:13,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:13,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708182348] [2024-06-21 15:58:13,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708182348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:13,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:13,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818787148] [2024-06-21 15:58:13,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:13,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:13,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:13,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 275 transitions, 3867 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:13,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:13,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:13,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:14,643 INFO L124 PetriNetUnfolderBase]: 3546/6157 cut-off events. [2024-06-21 15:58:14,644 INFO L125 PetriNetUnfolderBase]: For 356309/356309 co-relation queries the response was YES. [2024-06-21 15:58:14,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38454 conditions, 6157 events. 3546/6157 cut-off events. For 356309/356309 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42874 event pairs, 1071 based on Foata normal form. 42/6193 useless extension candidates. Maximal degree in co-relation 38359. Up to 4444 conditions per place. [2024-06-21 15:58:14,700 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 189 selfloop transitions, 121 changer transitions 0/319 dead transitions. [2024-06-21 15:58:14,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 319 transitions, 5059 flow [2024-06-21 15:58:14,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:14,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:14,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 229 transitions. [2024-06-21 15:58:14,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6815476190476191 [2024-06-21 15:58:14,701 INFO L175 Difference]: Start difference. First operand has 203 places, 275 transitions, 3867 flow. Second operand 8 states and 229 transitions. [2024-06-21 15:58:14,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 319 transitions, 5059 flow [2024-06-21 15:58:15,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 319 transitions, 4724 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:15,392 INFO L231 Difference]: Finished difference. Result has 205 places, 277 transitions, 3895 flow [2024-06-21 15:58:15,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3895, PETRI_PLACES=205, PETRI_TRANSITIONS=277} [2024-06-21 15:58:15,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-21 15:58:15,393 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 277 transitions, 3895 flow [2024-06-21 15:58:15,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:15,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:15,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:15,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 15:58:15,393 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:15,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:15,393 INFO L85 PathProgramCache]: Analyzing trace with hash -158870230, now seen corresponding path program 4 times [2024-06-21 15:58:15,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:15,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689442613] [2024-06-21 15:58:15,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:15,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:15,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:15,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689442613] [2024-06-21 15:58:15,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689442613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:15,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:15,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 15:58:15,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599234865] [2024-06-21 15:58:15,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:15,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 15:58:15,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:15,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 15:58:15,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 15:58:15,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:15,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 277 transitions, 3895 flow. Second operand has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:15,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:15,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:15,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:16,310 INFO L124 PetriNetUnfolderBase]: 3763/6553 cut-off events. [2024-06-21 15:58:16,311 INFO L125 PetriNetUnfolderBase]: For 391983/391983 co-relation queries the response was YES. [2024-06-21 15:58:16,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40338 conditions, 6553 events. 3763/6553 cut-off events. For 391983/391983 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46455 event pairs, 1104 based on Foata normal form. 42/6589 useless extension candidates. Maximal degree in co-relation 40242. Up to 3049 conditions per place. [2024-06-21 15:58:16,371 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 185 selfloop transitions, 130 changer transitions 0/324 dead transitions. [2024-06-21 15:58:16,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 324 transitions, 5091 flow [2024-06-21 15:58:16,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:16,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-21 15:58:16,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-21 15:58:16,372 INFO L175 Difference]: Start difference. First operand has 205 places, 277 transitions, 3895 flow. Second operand 8 states and 231 transitions. [2024-06-21 15:58:16,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 324 transitions, 5091 flow [2024-06-21 15:58:16,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 324 transitions, 4758 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:16,967 INFO L231 Difference]: Finished difference. Result has 206 places, 277 transitions, 3793 flow [2024-06-21 15:58:16,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3478, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3793, PETRI_PLACES=206, PETRI_TRANSITIONS=277} [2024-06-21 15:58:16,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 15:58:16,968 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 277 transitions, 3793 flow [2024-06-21 15:58:16,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.5) internal successors, (140), 8 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:16,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:16,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:16,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 15:58:16,968 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:16,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash 2099085123, now seen corresponding path program 1 times [2024-06-21 15:58:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:16,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377486150] [2024-06-21 15:58:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:16,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:17,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:17,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:17,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377486150] [2024-06-21 15:58:17,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377486150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:17,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:17,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:17,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305385281] [2024-06-21 15:58:17,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:17,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:17,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:17,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:17,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:17,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:17,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 277 transitions, 3793 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:17,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:17,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:17,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:17,839 INFO L124 PetriNetUnfolderBase]: 3779/6571 cut-off events. [2024-06-21 15:58:17,839 INFO L125 PetriNetUnfolderBase]: For 341834/341834 co-relation queries the response was YES. [2024-06-21 15:58:17,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40366 conditions, 6571 events. 3779/6571 cut-off events. For 341834/341834 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 46625 event pairs, 1308 based on Foata normal form. 4/6566 useless extension candidates. Maximal degree in co-relation 40269. Up to 5930 conditions per place. [2024-06-21 15:58:17,899 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 39 changer transitions 0/291 dead transitions. [2024-06-21 15:58:17,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 291 transitions, 4431 flow [2024-06-21 15:58:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:17,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:17,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:58:17,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-21 15:58:17,900 INFO L175 Difference]: Start difference. First operand has 206 places, 277 transitions, 3793 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:58:17,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 291 transitions, 4431 flow [2024-06-21 15:58:18,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 291 transitions, 4076 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:18,425 INFO L231 Difference]: Finished difference. Result has 206 places, 280 transitions, 3576 flow [2024-06-21 15:58:18,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3438, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3576, PETRI_PLACES=206, PETRI_TRANSITIONS=280} [2024-06-21 15:58:18,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 15:58:18,426 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 280 transitions, 3576 flow [2024-06-21 15:58:18,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:18,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:18,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:18,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 15:58:18,426 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:18,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:18,426 INFO L85 PathProgramCache]: Analyzing trace with hash 616383391, now seen corresponding path program 2 times [2024-06-21 15:58:18,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:18,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702583689] [2024-06-21 15:58:18,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:18,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:18,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:18,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:18,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:18,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702583689] [2024-06-21 15:58:18,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702583689] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:18,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:18,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:18,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608972662] [2024-06-21 15:58:18,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:18,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:18,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:18,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:18,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:18,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:18,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 280 transitions, 3576 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:18,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:18,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:18,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:19,290 INFO L124 PetriNetUnfolderBase]: 3655/6361 cut-off events. [2024-06-21 15:58:19,290 INFO L125 PetriNetUnfolderBase]: For 295688/295688 co-relation queries the response was YES. [2024-06-21 15:58:19,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37323 conditions, 6361 events. 3655/6361 cut-off events. For 295688/295688 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 44811 event pairs, 1215 based on Foata normal form. 4/6356 useless extension candidates. Maximal degree in co-relation 37225. Up to 5690 conditions per place. [2024-06-21 15:58:19,336 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 243 selfloop transitions, 43 changer transitions 0/295 dead transitions. [2024-06-21 15:58:19,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 295 transitions, 4230 flow [2024-06-21 15:58:19,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:19,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 15:58:19,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-21 15:58:19,338 INFO L175 Difference]: Start difference. First operand has 206 places, 280 transitions, 3576 flow. Second operand 6 states and 151 transitions. [2024-06-21 15:58:19,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 295 transitions, 4230 flow [2024-06-21 15:58:19,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 295 transitions, 4114 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:19,960 INFO L231 Difference]: Finished difference. Result has 208 places, 283 transitions, 3612 flow [2024-06-21 15:58:19,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3460, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3612, PETRI_PLACES=208, PETRI_TRANSITIONS=283} [2024-06-21 15:58:19,961 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-21 15:58:19,961 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 283 transitions, 3612 flow [2024-06-21 15:58:19,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:19,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:19,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:19,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 15:58:19,961 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:19,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:19,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1127082749, now seen corresponding path program 1 times [2024-06-21 15:58:19,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:19,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85854073] [2024-06-21 15:58:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:19,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:20,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:20,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85854073] [2024-06-21 15:58:20,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85854073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:20,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:20,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:20,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597824408] [2024-06-21 15:58:20,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:20,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:20,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:20,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:20,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:20,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:20,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 283 transitions, 3612 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:20,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:20,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:20,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:20,771 INFO L124 PetriNetUnfolderBase]: 3683/6422 cut-off events. [2024-06-21 15:58:20,771 INFO L125 PetriNetUnfolderBase]: For 304908/304908 co-relation queries the response was YES. [2024-06-21 15:58:20,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37957 conditions, 6422 events. 3683/6422 cut-off events. For 304908/304908 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45217 event pairs, 1206 based on Foata normal form. 2/6420 useless extension candidates. Maximal degree in co-relation 37858. Up to 5648 conditions per place. [2024-06-21 15:58:20,832 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 241 selfloop transitions, 61 changer transitions 0/311 dead transitions. [2024-06-21 15:58:20,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 311 transitions, 4719 flow [2024-06-21 15:58:20,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:20,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:20,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 15:58:20,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 15:58:20,833 INFO L175 Difference]: Start difference. First operand has 208 places, 283 transitions, 3612 flow. Second operand 7 states and 184 transitions. [2024-06-21 15:58:20,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 311 transitions, 4719 flow [2024-06-21 15:58:21,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 311 transitions, 4589 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:21,400 INFO L231 Difference]: Finished difference. Result has 212 places, 291 transitions, 3734 flow [2024-06-21 15:58:21,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3482, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3734, PETRI_PLACES=212, PETRI_TRANSITIONS=291} [2024-06-21 15:58:21,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 15:58:21,400 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 291 transitions, 3734 flow [2024-06-21 15:58:21,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:21,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:21,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:21,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 15:58:21,401 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:21,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash -933213391, now seen corresponding path program 2 times [2024-06-21 15:58:21,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:21,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651748578] [2024-06-21 15:58:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:21,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:21,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651748578] [2024-06-21 15:58:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651748578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:21,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364897813] [2024-06-21 15:58:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:21,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:21,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:21,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 291 transitions, 3734 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:21,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:21,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:21,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:22,291 INFO L124 PetriNetUnfolderBase]: 3693/6414 cut-off events. [2024-06-21 15:58:22,291 INFO L125 PetriNetUnfolderBase]: For 315485/315485 co-relation queries the response was YES. [2024-06-21 15:58:22,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38241 conditions, 6414 events. 3693/6414 cut-off events. For 315485/315485 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45099 event pairs, 1235 based on Foata normal form. 2/6400 useless extension candidates. Maximal degree in co-relation 38140. Up to 5658 conditions per place. [2024-06-21 15:58:22,355 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 231 selfloop transitions, 68 changer transitions 0/308 dead transitions. [2024-06-21 15:58:22,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 308 transitions, 4782 flow [2024-06-21 15:58:22,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:22,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:22,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:58:22,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 15:58:22,356 INFO L175 Difference]: Start difference. First operand has 212 places, 291 transitions, 3734 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:58:22,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 308 transitions, 4782 flow [2024-06-21 15:58:23,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 308 transitions, 4667 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:23,040 INFO L231 Difference]: Finished difference. Result has 215 places, 295 transitions, 3828 flow [2024-06-21 15:58:23,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3622, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3828, PETRI_PLACES=215, PETRI_TRANSITIONS=295} [2024-06-21 15:58:23,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-21 15:58:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 295 transitions, 3828 flow [2024-06-21 15:58:23,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:23,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:23,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:23,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 15:58:23,041 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:23,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash -36159865, now seen corresponding path program 3 times [2024-06-21 15:58:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:23,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706969356] [2024-06-21 15:58:23,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:23,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:23,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:23,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706969356] [2024-06-21 15:58:23,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706969356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:23,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:23,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:23,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036830645] [2024-06-21 15:58:23,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:23,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:23,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:23,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:23,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:23,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:23,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 295 transitions, 3828 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:23,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:23,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:23,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:23,845 INFO L124 PetriNetUnfolderBase]: 3689/6410 cut-off events. [2024-06-21 15:58:23,845 INFO L125 PetriNetUnfolderBase]: For 321728/321728 co-relation queries the response was YES. [2024-06-21 15:58:23,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38221 conditions, 6410 events. 3689/6410 cut-off events. For 321728/321728 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45123 event pairs, 1235 based on Foata normal form. 2/6396 useless extension candidates. Maximal degree in co-relation 38118. Up to 5656 conditions per place. [2024-06-21 15:58:23,906 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 63 changer transitions 0/308 dead transitions. [2024-06-21 15:58:23,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 308 transitions, 4816 flow [2024-06-21 15:58:23,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:23,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:23,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 15:58:23,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 15:58:23,907 INFO L175 Difference]: Start difference. First operand has 215 places, 295 transitions, 3828 flow. Second operand 6 states and 156 transitions. [2024-06-21 15:58:23,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 308 transitions, 4816 flow [2024-06-21 15:58:24,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 308 transitions, 4640 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:24,651 INFO L231 Difference]: Finished difference. Result has 217 places, 295 transitions, 3786 flow [2024-06-21 15:58:24,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3786, PETRI_PLACES=217, PETRI_TRANSITIONS=295} [2024-06-21 15:58:24,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 15:58:24,651 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 295 transitions, 3786 flow [2024-06-21 15:58:24,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:24,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:24,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:24,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 15:58:24,651 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:24,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:24,652 INFO L85 PathProgramCache]: Analyzing trace with hash 946483229, now seen corresponding path program 4 times [2024-06-21 15:58:24,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:24,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951423596] [2024-06-21 15:58:24,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:24,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:24,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:24,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:24,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951423596] [2024-06-21 15:58:24,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951423596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:24,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:24,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:24,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814926757] [2024-06-21 15:58:24,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:24,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:24,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:24,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:24,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:24,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:24,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 295 transitions, 3786 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:24,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:24,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:24,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:25,450 INFO L124 PetriNetUnfolderBase]: 3699/6450 cut-off events. [2024-06-21 15:58:25,450 INFO L125 PetriNetUnfolderBase]: For 330373/330373 co-relation queries the response was YES. [2024-06-21 15:58:25,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38425 conditions, 6450 events. 3699/6450 cut-off events. For 330373/330373 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45524 event pairs, 1215 based on Foata normal form. 2/6448 useless extension candidates. Maximal degree in co-relation 38323. Up to 5666 conditions per place. [2024-06-21 15:58:25,509 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 68 changer transitions 1/317 dead transitions. [2024-06-21 15:58:25,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 317 transitions, 4755 flow [2024-06-21 15:58:25,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:25,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-06-21 15:58:25,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-06-21 15:58:25,509 INFO L175 Difference]: Start difference. First operand has 217 places, 295 transitions, 3786 flow. Second operand 6 states and 161 transitions. [2024-06-21 15:58:25,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 317 transitions, 4755 flow [2024-06-21 15:58:26,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 317 transitions, 4542 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:26,101 INFO L231 Difference]: Finished difference. Result has 216 places, 298 transitions, 3768 flow [2024-06-21 15:58:26,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3579, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3768, PETRI_PLACES=216, PETRI_TRANSITIONS=298} [2024-06-21 15:58:26,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-21 15:58:26,102 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 298 transitions, 3768 flow [2024-06-21 15:58:26,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:26,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:26,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:26,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 15:58:26,103 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:26,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:26,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1741764323, now seen corresponding path program 5 times [2024-06-21 15:58:26,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:26,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790008088] [2024-06-21 15:58:26,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:26,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:26,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:26,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790008088] [2024-06-21 15:58:26,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790008088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:26,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:26,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:26,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285722844] [2024-06-21 15:58:26,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:26,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:26,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:26,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:26,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:26,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:26,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 298 transitions, 3768 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:26,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:26,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:26,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:26,896 INFO L124 PetriNetUnfolderBase]: 3707/6453 cut-off events. [2024-06-21 15:58:26,896 INFO L125 PetriNetUnfolderBase]: For 340385/340385 co-relation queries the response was YES. [2024-06-21 15:58:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38575 conditions, 6453 events. 3707/6453 cut-off events. For 340385/340385 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 45567 event pairs, 1245 based on Foata normal form. 2/6442 useless extension candidates. Maximal degree in co-relation 38475. Up to 5676 conditions per place. [2024-06-21 15:58:26,961 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 232 selfloop transitions, 72 changer transitions 1/314 dead transitions. [2024-06-21 15:58:26,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 314 transitions, 4721 flow [2024-06-21 15:58:26,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:26,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:26,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:58:26,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 15:58:26,964 INFO L175 Difference]: Start difference. First operand has 216 places, 298 transitions, 3768 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:58:26,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 314 transitions, 4721 flow [2024-06-21 15:58:27,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 314 transitions, 4611 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 15:58:27,616 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3856 flow [2024-06-21 15:58:27,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3661, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3856, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-21 15:58:27,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 15:58:27,616 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3856 flow [2024-06-21 15:58:27,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:27,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:27,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:27,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 15:58:27,617 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:27,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:27,617 INFO L85 PathProgramCache]: Analyzing trace with hash -285272941, now seen corresponding path program 6 times [2024-06-21 15:58:27,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:27,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292807589] [2024-06-21 15:58:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:27,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:27,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:27,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:27,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292807589] [2024-06-21 15:58:27,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292807589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:27,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:27,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:27,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921724026] [2024-06-21 15:58:27,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:27,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:27,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:27,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:27,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:27,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:27,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3856 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:27,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:27,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:27,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:28,406 INFO L124 PetriNetUnfolderBase]: 3638/6330 cut-off events. [2024-06-21 15:58:28,406 INFO L125 PetriNetUnfolderBase]: For 345416/345416 co-relation queries the response was YES. [2024-06-21 15:58:28,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38080 conditions, 6330 events. 3638/6330 cut-off events. For 345416/345416 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 44431 event pairs, 1171 based on Foata normal form. 2/6328 useless extension candidates. Maximal degree in co-relation 37979. Up to 5550 conditions per place. [2024-06-21 15:58:28,464 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 233 selfloop transitions, 70 changer transitions 3/315 dead transitions. [2024-06-21 15:58:28,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 315 transitions, 4628 flow [2024-06-21 15:58:28,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:28,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:28,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:58:28,465 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 15:58:28,465 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3856 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:58:28,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 315 transitions, 4628 flow [2024-06-21 15:58:29,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 315 transitions, 4470 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:29,016 INFO L231 Difference]: Finished difference. Result has 221 places, 298 transitions, 3803 flow [2024-06-21 15:58:29,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3698, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3803, PETRI_PLACES=221, PETRI_TRANSITIONS=298} [2024-06-21 15:58:29,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 15:58:29,016 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 298 transitions, 3803 flow [2024-06-21 15:58:29,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:29,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:29,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:29,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 15:58:29,017 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:29,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:29,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1741756387, now seen corresponding path program 1 times [2024-06-21 15:58:29,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:29,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53642132] [2024-06-21 15:58:29,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:29,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:29,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:29,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53642132] [2024-06-21 15:58:29,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53642132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:29,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:29,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:29,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629986834] [2024-06-21 15:58:29,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:29,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:29,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:29,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:29,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:29,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:29,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 298 transitions, 3803 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:29,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:29,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:29,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:29,751 INFO L124 PetriNetUnfolderBase]: 3470/6033 cut-off events. [2024-06-21 15:58:29,751 INFO L125 PetriNetUnfolderBase]: For 359298/359298 co-relation queries the response was YES. [2024-06-21 15:58:29,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37304 conditions, 6033 events. 3470/6033 cut-off events. For 359298/359298 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 41903 event pairs, 1086 based on Foata normal form. 4/6028 useless extension candidates. Maximal degree in co-relation 37203. Up to 5393 conditions per place. [2024-06-21 15:58:29,808 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 266 selfloop transitions, 37 changer transitions 0/312 dead transitions. [2024-06-21 15:58:29,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 312 transitions, 4491 flow [2024-06-21 15:58:29,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:29,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 15:58:29,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-21 15:58:29,809 INFO L175 Difference]: Start difference. First operand has 221 places, 298 transitions, 3803 flow. Second operand 6 states and 149 transitions. [2024-06-21 15:58:29,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 312 transitions, 4491 flow [2024-06-21 15:58:30,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 312 transitions, 4209 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 15:58:30,454 INFO L231 Difference]: Finished difference. Result has 219 places, 301 transitions, 3663 flow [2024-06-21 15:58:30,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3663, PETRI_PLACES=219, PETRI_TRANSITIONS=301} [2024-06-21 15:58:30,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 15:58:30,455 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 301 transitions, 3663 flow [2024-06-21 15:58:30,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:30,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:30,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:30,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 15:58:30,455 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:30,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:30,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1998256897, now seen corresponding path program 2 times [2024-06-21 15:58:30,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:30,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537655022] [2024-06-21 15:58:30,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:30,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:30,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:30,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537655022] [2024-06-21 15:58:30,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537655022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:30,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:30,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:30,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976627401] [2024-06-21 15:58:30,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:30,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:30,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:30,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:30,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:30,543 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:30,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 301 transitions, 3663 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:30,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:30,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:30,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:31,249 INFO L124 PetriNetUnfolderBase]: 3486/6072 cut-off events. [2024-06-21 15:58:31,249 INFO L125 PetriNetUnfolderBase]: For 368078/368078 co-relation queries the response was YES. [2024-06-21 15:58:31,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37457 conditions, 6072 events. 3486/6072 cut-off events. For 368078/368078 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42236 event pairs, 1077 based on Foata normal form. 4/6072 useless extension candidates. Maximal degree in co-relation 37355. Up to 5417 conditions per place. [2024-06-21 15:58:31,306 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 40 changer transitions 0/318 dead transitions. [2024-06-21 15:58:31,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 318 transitions, 4377 flow [2024-06-21 15:58:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:58:31,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 15:58:31,307 INFO L175 Difference]: Start difference. First operand has 219 places, 301 transitions, 3663 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:58:31,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 318 transitions, 4377 flow [2024-06-21 15:58:32,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 318 transitions, 4257 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:32,116 INFO L231 Difference]: Finished difference. Result has 221 places, 304 transitions, 3697 flow [2024-06-21 15:58:32,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3543, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3697, PETRI_PLACES=221, PETRI_TRANSITIONS=304} [2024-06-21 15:58:32,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-21 15:58:32,117 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 304 transitions, 3697 flow [2024-06-21 15:58:32,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:32,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:32,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:32,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 15:58:32,117 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:32,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:32,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1732233187, now seen corresponding path program 3 times [2024-06-21 15:58:32,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:32,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099437578] [2024-06-21 15:58:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:32,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:32,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:32,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:32,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099437578] [2024-06-21 15:58:32,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099437578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:32,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:32,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:32,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586153453] [2024-06-21 15:58:32,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:32,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:32,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:32,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:32,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:32,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:32,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 304 transitions, 3697 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:32,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:32,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:32,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:32,924 INFO L124 PetriNetUnfolderBase]: 3489/6074 cut-off events. [2024-06-21 15:58:32,925 INFO L125 PetriNetUnfolderBase]: For 375456/375456 co-relation queries the response was YES. [2024-06-21 15:58:32,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37542 conditions, 6074 events. 3489/6074 cut-off events. For 375456/375456 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42321 event pairs, 1081 based on Foata normal form. 4/6069 useless extension candidates. Maximal degree in co-relation 37439. Up to 5370 conditions per place. [2024-06-21 15:58:32,986 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 264 selfloop transitions, 46 changer transitions 0/319 dead transitions. [2024-06-21 15:58:32,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 319 transitions, 4413 flow [2024-06-21 15:58:32,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:32,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 15:58:32,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 15:58:32,987 INFO L175 Difference]: Start difference. First operand has 221 places, 304 transitions, 3697 flow. Second operand 6 states and 150 transitions. [2024-06-21 15:58:32,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 319 transitions, 4413 flow [2024-06-21 15:58:33,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 319 transitions, 4281 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:33,774 INFO L231 Difference]: Finished difference. Result has 223 places, 307 transitions, 3737 flow [2024-06-21 15:58:33,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3565, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3737, PETRI_PLACES=223, PETRI_TRANSITIONS=307} [2024-06-21 15:58:33,775 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 15:58:33,775 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 307 transitions, 3737 flow [2024-06-21 15:58:33,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:33,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:33,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:33,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 15:58:33,775 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:33,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:33,776 INFO L85 PathProgramCache]: Analyzing trace with hash -567846408, now seen corresponding path program 1 times [2024-06-21 15:58:33,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:33,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019047188] [2024-06-21 15:58:33,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:33,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:33,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:33,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:33,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019047188] [2024-06-21 15:58:33,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019047188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:33,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:33,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:33,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737343068] [2024-06-21 15:58:33,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:33,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:33,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:33,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:33,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:33,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:33,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 307 transitions, 3737 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:33,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:33,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:33,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:34,612 INFO L124 PetriNetUnfolderBase]: 3494/6074 cut-off events. [2024-06-21 15:58:34,613 INFO L125 PetriNetUnfolderBase]: For 379167/379167 co-relation queries the response was YES. [2024-06-21 15:58:34,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37771 conditions, 6074 events. 3494/6074 cut-off events. For 379167/379167 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 42062 event pairs, 1044 based on Foata normal form. 1/6061 useless extension candidates. Maximal degree in co-relation 37667. Up to 5291 conditions per place. [2024-06-21 15:58:34,676 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 242 selfloop transitions, 85 changer transitions 0/336 dead transitions. [2024-06-21 15:58:34,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 336 transitions, 4899 flow [2024-06-21 15:58:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 15:58:34,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 15:58:34,677 INFO L175 Difference]: Start difference. First operand has 223 places, 307 transitions, 3737 flow. Second operand 7 states and 189 transitions. [2024-06-21 15:58:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 336 transitions, 4899 flow [2024-06-21 15:58:35,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 336 transitions, 4749 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:35,278 INFO L231 Difference]: Finished difference. Result has 226 places, 310 transitions, 3805 flow [2024-06-21 15:58:35,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3587, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3805, PETRI_PLACES=226, PETRI_TRANSITIONS=310} [2024-06-21 15:58:35,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-21 15:58:35,278 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 310 transitions, 3805 flow [2024-06-21 15:58:35,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:35,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:35,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:35,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 15:58:35,278 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:35,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash 986087862, now seen corresponding path program 2 times [2024-06-21 15:58:35,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:35,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800139038] [2024-06-21 15:58:35,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:35,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:35,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:35,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:35,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:35,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800139038] [2024-06-21 15:58:35,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800139038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:35,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:35,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:35,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356704970] [2024-06-21 15:58:35,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:35,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:35,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:35,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:35,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:35,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:35,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 310 transitions, 3805 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:35,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:35,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:35,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:36,120 INFO L124 PetriNetUnfolderBase]: 3499/6086 cut-off events. [2024-06-21 15:58:36,121 INFO L125 PetriNetUnfolderBase]: For 389010/389010 co-relation queries the response was YES. [2024-06-21 15:58:36,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37950 conditions, 6086 events. 3499/6086 cut-off events. For 389010/389010 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42163 event pairs, 1078 based on Foata normal form. 1/6074 useless extension candidates. Maximal degree in co-relation 37845. Up to 5295 conditions per place. [2024-06-21 15:58:36,178 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 236 selfloop transitions, 88 changer transitions 0/333 dead transitions. [2024-06-21 15:58:36,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 333 transitions, 4951 flow [2024-06-21 15:58:36,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:58:36,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 15:58:36,179 INFO L175 Difference]: Start difference. First operand has 226 places, 310 transitions, 3805 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:58:36,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 333 transitions, 4951 flow [2024-06-21 15:58:36,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 333 transitions, 4805 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:36,835 INFO L231 Difference]: Finished difference. Result has 229 places, 313 transitions, 3883 flow [2024-06-21 15:58:36,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3665, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3883, PETRI_PLACES=229, PETRI_TRANSITIONS=313} [2024-06-21 15:58:36,836 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-21 15:58:36,836 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 313 transitions, 3883 flow [2024-06-21 15:58:36,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:36,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:36,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 15:58:36,836 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:36,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:36,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1415657962, now seen corresponding path program 1 times [2024-06-21 15:58:36,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:36,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249309518] [2024-06-21 15:58:36,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:36,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:36,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:36,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:36,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249309518] [2024-06-21 15:58:36,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249309518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:36,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:36,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:36,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393812373] [2024-06-21 15:58:36,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:36,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:36,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:36,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:36,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:36,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:36,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 313 transitions, 3883 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:36,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:36,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:36,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:37,744 INFO L124 PetriNetUnfolderBase]: 3515/6113 cut-off events. [2024-06-21 15:58:37,744 INFO L125 PetriNetUnfolderBase]: For 406769/406769 co-relation queries the response was YES. [2024-06-21 15:58:37,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6113 events. 3515/6113 cut-off events. For 406769/406769 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42308 event pairs, 948 based on Foata normal form. 4/6115 useless extension candidates. Maximal degree in co-relation 38133. Up to 5411 conditions per place. [2024-06-21 15:58:37,803 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 312 selfloop transitions, 28 changer transitions 0/349 dead transitions. [2024-06-21 15:58:37,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 349 transitions, 4814 flow [2024-06-21 15:58:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:37,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:37,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 15:58:37,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-21 15:58:37,804 INFO L175 Difference]: Start difference. First operand has 229 places, 313 transitions, 3883 flow. Second operand 8 states and 205 transitions. [2024-06-21 15:58:37,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 349 transitions, 4814 flow [2024-06-21 15:58:38,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 349 transitions, 4672 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:38,572 INFO L231 Difference]: Finished difference. Result has 233 places, 316 transitions, 3838 flow [2024-06-21 15:58:38,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3838, PETRI_PLACES=233, PETRI_TRANSITIONS=316} [2024-06-21 15:58:38,573 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-21 15:58:38,573 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 316 transitions, 3838 flow [2024-06-21 15:58:38,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:38,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:38,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 15:58:38,574 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:38,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:38,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1406134762, now seen corresponding path program 2 times [2024-06-21 15:58:38,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:38,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301681671] [2024-06-21 15:58:38,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:38,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:38,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:38,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:38,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301681671] [2024-06-21 15:58:38,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301681671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:38,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:38,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:38,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074109898] [2024-06-21 15:58:38,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:38,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:38,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:38,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:38,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:38,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:38,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 316 transitions, 3838 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:38,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:38,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:38,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:39,462 INFO L124 PetriNetUnfolderBase]: 3495/6086 cut-off events. [2024-06-21 15:58:39,462 INFO L125 PetriNetUnfolderBase]: For 407376/407376 co-relation queries the response was YES. [2024-06-21 15:58:39,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37828 conditions, 6086 events. 3495/6086 cut-off events. For 407376/407376 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 42243 event pairs, 1045 based on Foata normal form. 4/6088 useless extension candidates. Maximal degree in co-relation 37721. Up to 5497 conditions per place. [2024-06-21 15:58:39,524 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 314 selfloop transitions, 21 changer transitions 0/344 dead transitions. [2024-06-21 15:58:39,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 344 transitions, 4578 flow [2024-06-21 15:58:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:58:39,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:58:39,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 15:58:39,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-21 15:58:39,529 INFO L175 Difference]: Start difference. First operand has 233 places, 316 transitions, 3838 flow. Second operand 8 states and 199 transitions. [2024-06-21 15:58:39,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 344 transitions, 4578 flow [2024-06-21 15:58:40,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 344 transitions, 4523 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:40,524 INFO L231 Difference]: Finished difference. Result has 236 places, 316 transitions, 3831 flow [2024-06-21 15:58:40,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3783, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3831, PETRI_PLACES=236, PETRI_TRANSITIONS=316} [2024-06-21 15:58:40,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-21 15:58:40,524 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 316 transitions, 3831 flow [2024-06-21 15:58:40,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:40,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:40,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 15:58:40,525 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:40,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:40,525 INFO L85 PathProgramCache]: Analyzing trace with hash 986084886, now seen corresponding path program 3 times [2024-06-21 15:58:40,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:40,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755355799] [2024-06-21 15:58:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:40,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:40,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:40,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:40,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:40,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755355799] [2024-06-21 15:58:40,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755355799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:40,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:40,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:40,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150896369] [2024-06-21 15:58:40,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:40,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:40,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:40,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:40,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:40,618 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:40,618 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 316 transitions, 3831 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:40,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:40,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:40,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:41,379 INFO L124 PetriNetUnfolderBase]: 3511/6098 cut-off events. [2024-06-21 15:58:41,380 INFO L125 PetriNetUnfolderBase]: For 421421/421421 co-relation queries the response was YES. [2024-06-21 15:58:41,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38239 conditions, 6098 events. 3511/6098 cut-off events. For 421421/421421 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42273 event pairs, 1068 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 38131. Up to 5299 conditions per place. [2024-06-21 15:58:41,438 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 91 changer transitions 0/340 dead transitions. [2024-06-21 15:58:41,438 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 340 transitions, 5065 flow [2024-06-21 15:58:41,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:41,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:41,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 15:58:41,439 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6224489795918368 [2024-06-21 15:58:41,439 INFO L175 Difference]: Start difference. First operand has 236 places, 316 transitions, 3831 flow. Second operand 7 states and 183 transitions. [2024-06-21 15:58:41,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 340 transitions, 5065 flow [2024-06-21 15:58:42,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 340 transitions, 4993 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 15:58:42,373 INFO L231 Difference]: Finished difference. Result has 235 places, 319 transitions, 4049 flow [2024-06-21 15:58:42,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3759, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4049, PETRI_PLACES=235, PETRI_TRANSITIONS=319} [2024-06-21 15:58:42,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 15:58:42,374 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 319 transitions, 4049 flow [2024-06-21 15:58:42,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:42,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:42,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 15:58:42,374 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:42,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:42,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1125194538, now seen corresponding path program 1 times [2024-06-21 15:58:42,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:42,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602204334] [2024-06-21 15:58:42,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:42,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:42,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:42,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602204334] [2024-06-21 15:58:42,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602204334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:42,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:42,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:42,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201797551] [2024-06-21 15:58:42,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:42,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:42,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:42,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:42,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:42,450 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:42,450 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 319 transitions, 4049 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:42,450 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:42,450 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:42,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:43,320 INFO L124 PetriNetUnfolderBase]: 3516/6106 cut-off events. [2024-06-21 15:58:43,320 INFO L125 PetriNetUnfolderBase]: For 426449/426449 co-relation queries the response was YES. [2024-06-21 15:58:43,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38751 conditions, 6106 events. 3516/6106 cut-off events. For 426449/426449 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 42331 event pairs, 1077 based on Foata normal form. 1/6095 useless extension candidates. Maximal degree in co-relation 38642. Up to 5336 conditions per place. [2024-06-21 15:58:43,375 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 78 changer transitions 0/346 dead transitions. [2024-06-21 15:58:43,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 346 transitions, 4957 flow [2024-06-21 15:58:43,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:43,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:43,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 15:58:43,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 15:58:43,376 INFO L175 Difference]: Start difference. First operand has 235 places, 319 transitions, 4049 flow. Second operand 7 states and 186 transitions. [2024-06-21 15:58:43,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 346 transitions, 4957 flow [2024-06-21 15:58:44,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 346 transitions, 4689 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:44,459 INFO L231 Difference]: Finished difference. Result has 237 places, 322 transitions, 3973 flow [2024-06-21 15:58:44,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3973, PETRI_PLACES=237, PETRI_TRANSITIONS=322} [2024-06-21 15:58:44,460 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-21 15:58:44,460 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 322 transitions, 3973 flow [2024-06-21 15:58:44,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:44,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:44,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:44,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 15:58:44,460 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:44,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:44,461 INFO L85 PathProgramCache]: Analyzing trace with hash 634389880, now seen corresponding path program 2 times [2024-06-21 15:58:44,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:44,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290332734] [2024-06-21 15:58:44,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:44,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:44,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:44,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:44,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290332734] [2024-06-21 15:58:44,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290332734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:44,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:44,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:44,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83839183] [2024-06-21 15:58:44,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:44,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:44,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:44,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:44,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:44,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:44,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 322 transitions, 3973 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:44,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:44,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:44,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:45,296 INFO L124 PetriNetUnfolderBase]: 3529/6127 cut-off events. [2024-06-21 15:58:45,297 INFO L125 PetriNetUnfolderBase]: For 437587/437587 co-relation queries the response was YES. [2024-06-21 15:58:45,341 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38791 conditions, 6127 events. 3529/6127 cut-off events. For 437587/437587 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 42497 event pairs, 1077 based on Foata normal form. 1/6116 useless extension candidates. Maximal degree in co-relation 38681. Up to 5346 conditions per place. [2024-06-21 15:58:45,360 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 251 selfloop transitions, 86 changer transitions 0/346 dead transitions. [2024-06-21 15:58:45,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 346 transitions, 5055 flow [2024-06-21 15:58:45,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:45,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 15:58:45,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 15:58:45,361 INFO L175 Difference]: Start difference. First operand has 237 places, 322 transitions, 3973 flow. Second operand 6 states and 160 transitions. [2024-06-21 15:58:45,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 346 transitions, 5055 flow [2024-06-21 15:58:46,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 346 transitions, 4895 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:46,535 INFO L231 Difference]: Finished difference. Result has 239 places, 328 transitions, 4063 flow [2024-06-21 15:58:46,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4063, PETRI_PLACES=239, PETRI_TRANSITIONS=328} [2024-06-21 15:58:46,535 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 15:58:46,535 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 328 transitions, 4063 flow [2024-06-21 15:58:46,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:46,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:46,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:46,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 15:58:46,536 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:46,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:46,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1974182714, now seen corresponding path program 3 times [2024-06-21 15:58:46,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:46,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236190982] [2024-06-21 15:58:46,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:46,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:46,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:46,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:46,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236190982] [2024-06-21 15:58:46,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236190982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:46,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:46,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:46,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852454358] [2024-06-21 15:58:46,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:46,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:46,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:46,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:46,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:46,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:46,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 328 transitions, 4063 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:46,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:46,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:46,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:47,446 INFO L124 PetriNetUnfolderBase]: 3526/6126 cut-off events. [2024-06-21 15:58:47,446 INFO L125 PetriNetUnfolderBase]: For 446069/446069 co-relation queries the response was YES. [2024-06-21 15:58:47,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38853 conditions, 6126 events. 3526/6126 cut-off events. For 446069/446069 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 42610 event pairs, 1059 based on Foata normal form. 1/6121 useless extension candidates. Maximal degree in co-relation 38742. Up to 5334 conditions per place. [2024-06-21 15:58:47,507 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 258 selfloop transitions, 83 changer transitions 0/350 dead transitions. [2024-06-21 15:58:47,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 350 transitions, 5095 flow [2024-06-21 15:58:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:47,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 15:58:47,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 15:58:47,508 INFO L175 Difference]: Start difference. First operand has 239 places, 328 transitions, 4063 flow. Second operand 7 states and 184 transitions. [2024-06-21 15:58:47,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 350 transitions, 5095 flow [2024-06-21 15:58:48,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 350 transitions, 4985 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 15:58:48,596 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4125 flow [2024-06-21 15:58:48,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4125, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-21 15:58:48,596 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 15:58:48,596 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4125 flow [2024-06-21 15:58:48,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:48,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:48,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:48,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 15:58:48,597 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:48,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:48,597 INFO L85 PathProgramCache]: Analyzing trace with hash 218188978, now seen corresponding path program 4 times [2024-06-21 15:58:48,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:48,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069247694] [2024-06-21 15:58:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:48,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:48,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:48,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:48,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069247694] [2024-06-21 15:58:48,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069247694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:48,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:48,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:48,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514862249] [2024-06-21 15:58:48,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:48,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:48,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:48,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:48,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:48,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:48,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4125 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:48,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:48,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:48,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:49,482 INFO L124 PetriNetUnfolderBase]: 3520/6096 cut-off events. [2024-06-21 15:58:49,482 INFO L125 PetriNetUnfolderBase]: For 456153/456153 co-relation queries the response was YES. [2024-06-21 15:58:49,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38826 conditions, 6096 events. 3520/6096 cut-off events. For 456153/456153 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 42272 event pairs, 1098 based on Foata normal form. 2/6084 useless extension candidates. Maximal degree in co-relation 38714. Up to 5329 conditions per place. [2024-06-21 15:58:49,545 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 250 selfloop transitions, 82 changer transitions 0/341 dead transitions. [2024-06-21 15:58:49,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 341 transitions, 5119 flow [2024-06-21 15:58:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:49,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:49,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:58:49,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 15:58:49,546 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4125 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:58:49,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 341 transitions, 5119 flow [2024-06-21 15:58:50,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 341 transitions, 4884 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 15:58:50,538 INFO L231 Difference]: Finished difference. Result has 244 places, 328 transitions, 4061 flow [2024-06-21 15:58:50,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3890, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4061, PETRI_PLACES=244, PETRI_TRANSITIONS=328} [2024-06-21 15:58:50,538 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 201 predicate places. [2024-06-21 15:58:50,538 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 328 transitions, 4061 flow [2024-06-21 15:58:50,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:50,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:50,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:50,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 15:58:50,539 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:50,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:50,539 INFO L85 PathProgramCache]: Analyzing trace with hash 140109334, now seen corresponding path program 4 times [2024-06-21 15:58:50,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:50,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082575657] [2024-06-21 15:58:50,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:50,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:50,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082575657] [2024-06-21 15:58:50,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082575657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:50,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:50,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:50,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374957420] [2024-06-21 15:58:50,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:50,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:50,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:50,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:50,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:50,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:50,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 328 transitions, 4061 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:50,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:50,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:50,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:51,443 INFO L124 PetriNetUnfolderBase]: 3579/6187 cut-off events. [2024-06-21 15:58:51,443 INFO L125 PetriNetUnfolderBase]: For 516797/516797 co-relation queries the response was YES. [2024-06-21 15:58:51,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39460 conditions, 6187 events. 3579/6187 cut-off events. For 516797/516797 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 42994 event pairs, 1107 based on Foata normal form. 20/6193 useless extension candidates. Maximal degree in co-relation 39347. Up to 5346 conditions per place. [2024-06-21 15:58:51,507 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 255 selfloop transitions, 84 changer transitions 0/348 dead transitions. [2024-06-21 15:58:51,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 348 transitions, 5197 flow [2024-06-21 15:58:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:51,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:51,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:58:51,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 15:58:51,508 INFO L175 Difference]: Start difference. First operand has 244 places, 328 transitions, 4061 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:58:51,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 348 transitions, 5197 flow [2024-06-21 15:58:52,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 348 transitions, 5005 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:58:52,643 INFO L231 Difference]: Finished difference. Result has 245 places, 331 transitions, 4152 flow [2024-06-21 15:58:52,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3869, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4152, PETRI_PLACES=245, PETRI_TRANSITIONS=331} [2024-06-21 15:58:52,644 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-21 15:58:52,644 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 331 transitions, 4152 flow [2024-06-21 15:58:52,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:52,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:52,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:52,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 15:58:52,645 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:52,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:52,645 INFO L85 PathProgramCache]: Analyzing trace with hash 161026214, now seen corresponding path program 3 times [2024-06-21 15:58:52,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:52,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585759091] [2024-06-21 15:58:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:52,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:52,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:52,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:52,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:52,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585759091] [2024-06-21 15:58:52,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585759091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:52,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:52,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:52,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048031894] [2024-06-21 15:58:52,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:52,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:52,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:52,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:52,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:52,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:52,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 331 transitions, 4152 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:52,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:52,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:52,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:53,547 INFO L124 PetriNetUnfolderBase]: 3584/6223 cut-off events. [2024-06-21 15:58:53,547 INFO L125 PetriNetUnfolderBase]: For 473250/473250 co-relation queries the response was YES. [2024-06-21 15:58:53,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39823 conditions, 6223 events. 3584/6223 cut-off events. For 473250/473250 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43320 event pairs, 1083 based on Foata normal form. 1/6220 useless extension candidates. Maximal degree in co-relation 39708. Up to 5431 conditions per place. [2024-06-21 15:58:53,613 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 268 selfloop transitions, 78 changer transitions 0/355 dead transitions. [2024-06-21 15:58:53,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 355 transitions, 5083 flow [2024-06-21 15:58:53,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:53,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 15:58:53,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 15:58:53,613 INFO L175 Difference]: Start difference. First operand has 245 places, 331 transitions, 4152 flow. Second operand 7 states and 184 transitions. [2024-06-21 15:58:53,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 355 transitions, 5083 flow [2024-06-21 15:58:54,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 355 transitions, 4838 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 15:58:54,663 INFO L231 Difference]: Finished difference. Result has 247 places, 334 transitions, 4104 flow [2024-06-21 15:58:54,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3907, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4104, PETRI_PLACES=247, PETRI_TRANSITIONS=334} [2024-06-21 15:58:54,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 15:58:54,663 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 334 transitions, 4104 flow [2024-06-21 15:58:54,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:54,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:54,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:54,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 15:58:54,664 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:54,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:54,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1120228062, now seen corresponding path program 4 times [2024-06-21 15:58:54,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:54,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040924125] [2024-06-21 15:58:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:54,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:54,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:54,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040924125] [2024-06-21 15:58:54,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040924125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:54,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:54,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:54,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046922716] [2024-06-21 15:58:54,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:54,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:54,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:54,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:54,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:54,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:54,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 334 transitions, 4104 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:54,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:54,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:54,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:55,567 INFO L124 PetriNetUnfolderBase]: 3581/6219 cut-off events. [2024-06-21 15:58:55,567 INFO L125 PetriNetUnfolderBase]: For 476342/476342 co-relation queries the response was YES. [2024-06-21 15:58:55,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39291 conditions, 6219 events. 3581/6219 cut-off events. For 476342/476342 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43341 event pairs, 1076 based on Foata normal form. 1/6216 useless extension candidates. Maximal degree in co-relation 39175. Up to 5429 conditions per place. [2024-06-21 15:58:55,635 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 80 changer transitions 0/358 dead transitions. [2024-06-21 15:58:55,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 358 transitions, 5172 flow [2024-06-21 15:58:55,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:58:55,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:58:55,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 227 transitions. [2024-06-21 15:58:55,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6005291005291006 [2024-06-21 15:58:55,636 INFO L175 Difference]: Start difference. First operand has 247 places, 334 transitions, 4104 flow. Second operand 9 states and 227 transitions. [2024-06-21 15:58:55,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 358 transitions, 5172 flow [2024-06-21 15:58:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 358 transitions, 5063 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 15:58:56,819 INFO L231 Difference]: Finished difference. Result has 252 places, 334 transitions, 4161 flow [2024-06-21 15:58:56,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3995, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4161, PETRI_PLACES=252, PETRI_TRANSITIONS=334} [2024-06-21 15:58:56,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 15:58:56,819 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 334 transitions, 4161 flow [2024-06-21 15:58:56,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:56,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:56,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:56,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 15:58:56,820 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:56,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:56,820 INFO L85 PathProgramCache]: Analyzing trace with hash 2124365594, now seen corresponding path program 5 times [2024-06-21 15:58:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:56,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498128591] [2024-06-21 15:58:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:56,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:56,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498128591] [2024-06-21 15:58:56,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498128591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:56,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:56,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:58:56,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806565795] [2024-06-21 15:58:56,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:56,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:58:56,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:58:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:58:56,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:56,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 334 transitions, 4161 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:56,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:56,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:56,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:57,788 INFO L124 PetriNetUnfolderBase]: 3573/6206 cut-off events. [2024-06-21 15:58:57,789 INFO L125 PetriNetUnfolderBase]: For 485321/485321 co-relation queries the response was YES. [2024-06-21 15:58:57,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39242 conditions, 6206 events. 3573/6206 cut-off events. For 485321/485321 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 43204 event pairs, 1076 based on Foata normal form. 2/6204 useless extension candidates. Maximal degree in co-relation 39124. Up to 5421 conditions per place. [2024-06-21 15:58:57,849 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 266 selfloop transitions, 77 changer transitions 0/352 dead transitions. [2024-06-21 15:58:57,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 352 transitions, 5049 flow [2024-06-21 15:58:57,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:58:57,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:58:57,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:58:57,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 15:58:57,850 INFO L175 Difference]: Start difference. First operand has 252 places, 334 transitions, 4161 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:58:57,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 352 transitions, 5049 flow [2024-06-21 15:58:58,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 352 transitions, 4815 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 15:58:58,845 INFO L231 Difference]: Finished difference. Result has 250 places, 334 transitions, 4089 flow [2024-06-21 15:58:58,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4089, PETRI_PLACES=250, PETRI_TRANSITIONS=334} [2024-06-21 15:58:58,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 15:58:58,846 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 334 transitions, 4089 flow [2024-06-21 15:58:58,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:58,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:58:58,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:58:58,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 15:58:58,846 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:58:58,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:58:58,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1947503984, now seen corresponding path program 6 times [2024-06-21 15:58:58,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:58:58,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961198373] [2024-06-21 15:58:58,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:58:58,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:58:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:58:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:58:58,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:58:58,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961198373] [2024-06-21 15:58:58,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961198373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:58:58,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:58:58,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:58:58,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112254371] [2024-06-21 15:58:58,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:58:58,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:58:58,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:58:58,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:58:58,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:58:58,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:58:58,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 334 transitions, 4089 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:58:58,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:58:58,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:58:58,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:58:59,696 INFO L124 PetriNetUnfolderBase]: 3583/6200 cut-off events. [2024-06-21 15:58:59,696 INFO L125 PetriNetUnfolderBase]: For 496963/496963 co-relation queries the response was YES. [2024-06-21 15:58:59,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39421 conditions, 6200 events. 3583/6200 cut-off events. For 496963/496963 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43228 event pairs, 1105 based on Foata normal form. 2/6184 useless extension candidates. Maximal degree in co-relation 39303. Up to 5431 conditions per place. [2024-06-21 15:58:59,762 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 256 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-21 15:58:59,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 349 transitions, 5008 flow [2024-06-21 15:58:59,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:58:59,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:58:59,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 15:58:59,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-21 15:58:59,763 INFO L175 Difference]: Start difference. First operand has 250 places, 334 transitions, 4089 flow. Second operand 6 states and 155 transitions. [2024-06-21 15:58:59,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 349 transitions, 5008 flow [2024-06-21 15:59:00,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 349 transitions, 4848 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:00,864 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4157 flow [2024-06-21 15:59:00,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4157, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-21 15:59:00,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 15:59:00,864 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4157 flow [2024-06-21 15:59:00,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:00,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:00,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:00,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 15:59:00,864 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:00,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:00,865 INFO L85 PathProgramCache]: Analyzing trace with hash -298911146, now seen corresponding path program 7 times [2024-06-21 15:59:00,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:00,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522961251] [2024-06-21 15:59:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:00,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:00,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:00,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522961251] [2024-06-21 15:59:00,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522961251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:00,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:00,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:00,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533513621] [2024-06-21 15:59:00,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:00,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:00,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:00,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:00,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:00,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:00,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:00,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:00,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:01,839 INFO L124 PetriNetUnfolderBase]: 3575/6188 cut-off events. [2024-06-21 15:59:01,839 INFO L125 PetriNetUnfolderBase]: For 501744/501744 co-relation queries the response was YES. [2024-06-21 15:59:01,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39328 conditions, 6188 events. 3575/6188 cut-off events. For 501744/501744 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43075 event pairs, 1105 based on Foata normal form. 2/6172 useless extension candidates. Maximal degree in co-relation 39209. Up to 5423 conditions per place. [2024-06-21 15:59:01,909 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 259 selfloop transitions, 80 changer transitions 0/348 dead transitions. [2024-06-21 15:59:01,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 348 transitions, 4859 flow [2024-06-21 15:59:01,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:59:01,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 15:59:01,910 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4157 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:59:01,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 348 transitions, 4859 flow [2024-06-21 15:59:02,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 348 transitions, 4564 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:02,929 INFO L231 Difference]: Finished difference. Result has 250 places, 338 transitions, 4031 flow [2024-06-21 15:59:02,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3862, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4031, PETRI_PLACES=250, PETRI_TRANSITIONS=338} [2024-06-21 15:59:02,929 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-21 15:59:02,929 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 338 transitions, 4031 flow [2024-06-21 15:59:02,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:02,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:02,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:02,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 15:59:02,930 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:02,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:02,930 INFO L85 PathProgramCache]: Analyzing trace with hash -869801354, now seen corresponding path program 1 times [2024-06-21 15:59:02,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:02,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548550366] [2024-06-21 15:59:02,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:02,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:02,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:02,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:02,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:02,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548550366] [2024-06-21 15:59:02,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548550366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:02,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:02,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:02,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712499410] [2024-06-21 15:59:02,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:02,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:02,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:02,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:02,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:03,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:03,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 338 transitions, 4031 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:03,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:03,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:03,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:03,897 INFO L124 PetriNetUnfolderBase]: 3596/6248 cut-off events. [2024-06-21 15:59:03,897 INFO L125 PetriNetUnfolderBase]: For 520955/520955 co-relation queries the response was YES. [2024-06-21 15:59:03,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39988 conditions, 6248 events. 3596/6248 cut-off events. For 520955/520955 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43512 event pairs, 967 based on Foata normal form. 2/6248 useless extension candidates. Maximal degree in co-relation 39868. Up to 5636 conditions per place. [2024-06-21 15:59:03,968 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 330 selfloop transitions, 27 changer transitions 0/366 dead transitions. [2024-06-21 15:59:03,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 366 transitions, 5119 flow [2024-06-21 15:59:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 15:59:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 15:59:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 15:59:03,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5863095238095238 [2024-06-21 15:59:03,969 INFO L175 Difference]: Start difference. First operand has 250 places, 338 transitions, 4031 flow. Second operand 8 states and 197 transitions. [2024-06-21 15:59:03,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 366 transitions, 5119 flow [2024-06-21 15:59:05,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 366 transitions, 4925 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:05,136 INFO L231 Difference]: Finished difference. Result has 252 places, 342 transitions, 4052 flow [2024-06-21 15:59:05,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4052, PETRI_PLACES=252, PETRI_TRANSITIONS=342} [2024-06-21 15:59:05,136 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 209 predicate places. [2024-06-21 15:59:05,136 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 342 transitions, 4052 flow [2024-06-21 15:59:05,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:05,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:05,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:05,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 15:59:05,137 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:05,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 256529304, now seen corresponding path program 2 times [2024-06-21 15:59:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274808157] [2024-06-21 15:59:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:05,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:05,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:05,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274808157] [2024-06-21 15:59:05,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274808157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:05,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:05,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:05,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211493449] [2024-06-21 15:59:05,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:05,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:05,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:05,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:05,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:05,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 342 transitions, 4052 flow. Second operand has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:05,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:05,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:05,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:06,107 INFO L124 PetriNetUnfolderBase]: 3591/6241 cut-off events. [2024-06-21 15:59:06,107 INFO L125 PetriNetUnfolderBase]: For 526082/526082 co-relation queries the response was YES. [2024-06-21 15:59:06,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39757 conditions, 6241 events. 3591/6241 cut-off events. For 526082/526082 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43453 event pairs, 1050 based on Foata normal form. 2/6241 useless extension candidates. Maximal degree in co-relation 39636. Up to 5664 conditions per place. [2024-06-21 15:59:06,177 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 329 selfloop transitions, 22 changer transitions 0/360 dead transitions. [2024-06-21 15:59:06,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 360 transitions, 4798 flow [2024-06-21 15:59:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:06,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 15:59:06,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5850340136054422 [2024-06-21 15:59:06,178 INFO L175 Difference]: Start difference. First operand has 252 places, 342 transitions, 4052 flow. Second operand 7 states and 172 transitions. [2024-06-21 15:59:06,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 360 transitions, 4798 flow [2024-06-21 15:59:07,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 360 transitions, 4635 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:07,428 INFO L231 Difference]: Finished difference. Result has 255 places, 342 transitions, 3938 flow [2024-06-21 15:59:07,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3938, PETRI_PLACES=255, PETRI_TRANSITIONS=342} [2024-06-21 15:59:07,429 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 15:59:07,429 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 342 transitions, 3938 flow [2024-06-21 15:59:07,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.0) internal successors, (126), 7 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:07,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:07,429 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:07,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 15:59:07,429 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:07,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:07,430 INFO L85 PathProgramCache]: Analyzing trace with hash 392142586, now seen corresponding path program 3 times [2024-06-21 15:59:07,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:07,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302397234] [2024-06-21 15:59:07,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:07,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:07,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:07,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:07,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:07,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302397234] [2024-06-21 15:59:07,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302397234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:07,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:07,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:07,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795216655] [2024-06-21 15:59:07,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:07,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:07,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:07,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:07,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 342 transitions, 3938 flow. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:07,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:07,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:07,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:08,340 INFO L124 PetriNetUnfolderBase]: 3586/6227 cut-off events. [2024-06-21 15:59:08,340 INFO L125 PetriNetUnfolderBase]: For 531044/531044 co-relation queries the response was YES. [2024-06-21 15:59:08,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39429 conditions, 6227 events. 3586/6227 cut-off events. For 531044/531044 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 43358 event pairs, 1056 based on Foata normal form. 2/6222 useless extension candidates. Maximal degree in co-relation 39306. Up to 5657 conditions per place. [2024-06-21 15:59:08,405 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 324 selfloop transitions, 22 changer transitions 0/355 dead transitions. [2024-06-21 15:59:08,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 355 transitions, 4736 flow [2024-06-21 15:59:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:08,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 15:59:08,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 15:59:08,413 INFO L175 Difference]: Start difference. First operand has 255 places, 342 transitions, 3938 flow. Second operand 6 states and 146 transitions. [2024-06-21 15:59:08,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 355 transitions, 4736 flow [2024-06-21 15:59:09,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 355 transitions, 4682 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:09,793 INFO L231 Difference]: Finished difference. Result has 255 places, 344 transitions, 4017 flow [2024-06-21 15:59:09,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3884, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4017, PETRI_PLACES=255, PETRI_TRANSITIONS=344} [2024-06-21 15:59:09,793 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-21 15:59:09,794 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 344 transitions, 4017 flow [2024-06-21 15:59:09,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:09,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:09,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:09,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 15:59:09,794 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:09,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash -640411164, now seen corresponding path program 1 times [2024-06-21 15:59:09,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:09,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403315612] [2024-06-21 15:59:09,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:09,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:09,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:09,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403315612] [2024-06-21 15:59:09,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403315612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:09,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:09,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:09,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390710216] [2024-06-21 15:59:09,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:09,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:09,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:09,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:09,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:09,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 344 transitions, 4017 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:09,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:09,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:09,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:10,720 INFO L124 PetriNetUnfolderBase]: 3591/6232 cut-off events. [2024-06-21 15:59:10,720 INFO L125 PetriNetUnfolderBase]: For 539044/539044 co-relation queries the response was YES. [2024-06-21 15:59:10,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39665 conditions, 6232 events. 3591/6232 cut-off events. For 539044/539044 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43435 event pairs, 1060 based on Foata normal form. 1/6227 useless extension candidates. Maximal degree in co-relation 39541. Up to 5543 conditions per place. [2024-06-21 15:59:10,792 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 58 changer transitions 0/361 dead transitions. [2024-06-21 15:59:10,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 361 transitions, 4974 flow [2024-06-21 15:59:10,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:10,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:10,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:59:10,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 15:59:10,793 INFO L175 Difference]: Start difference. First operand has 255 places, 344 transitions, 4017 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:59:10,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 361 transitions, 4974 flow [2024-06-21 15:59:12,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 361 transitions, 4857 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:12,071 INFO L231 Difference]: Finished difference. Result has 257 places, 347 transitions, 4078 flow [2024-06-21 15:59:12,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3900, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4078, PETRI_PLACES=257, PETRI_TRANSITIONS=347} [2024-06-21 15:59:12,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-21 15:59:12,071 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 347 transitions, 4078 flow [2024-06-21 15:59:12,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:12,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:12,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 15:59:12,072 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:12,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1722790722, now seen corresponding path program 2 times [2024-06-21 15:59:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:12,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364366527] [2024-06-21 15:59:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:12,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:12,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:12,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:12,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364366527] [2024-06-21 15:59:12,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364366527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:12,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:12,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:12,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834675714] [2024-06-21 15:59:12,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:12,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:12,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:12,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:12,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:12,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:12,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 347 transitions, 4078 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:12,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:12,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:12,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:13,001 INFO L124 PetriNetUnfolderBase]: 3588/6228 cut-off events. [2024-06-21 15:59:13,001 INFO L125 PetriNetUnfolderBase]: For 546408/546408 co-relation queries the response was YES. [2024-06-21 15:59:13,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39700 conditions, 6228 events. 3588/6228 cut-off events. For 546408/546408 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 43333 event pairs, 1060 based on Foata normal form. 1/6223 useless extension candidates. Maximal degree in co-relation 39575. Up to 5540 conditions per place. [2024-06-21 15:59:13,076 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 295 selfloop transitions, 56 changer transitions 0/360 dead transitions. [2024-06-21 15:59:13,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 360 transitions, 4812 flow [2024-06-21 15:59:13,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 15:59:13,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 15:59:13,077 INFO L175 Difference]: Start difference. First operand has 257 places, 347 transitions, 4078 flow. Second operand 6 states and 156 transitions. [2024-06-21 15:59:13,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 360 transitions, 4812 flow [2024-06-21 15:59:14,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 360 transitions, 4687 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:14,409 INFO L231 Difference]: Finished difference. Result has 258 places, 347 transitions, 4076 flow [2024-06-21 15:59:14,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3953, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4076, PETRI_PLACES=258, PETRI_TRANSITIONS=347} [2024-06-21 15:59:14,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-21 15:59:14,409 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 347 transitions, 4076 flow [2024-06-21 15:59:14,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:14,410 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:14,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 15:59:14,410 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:14,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash 403318402, now seen corresponding path program 3 times [2024-06-21 15:59:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:14,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339804644] [2024-06-21 15:59:14,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:14,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:14,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:14,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:14,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339804644] [2024-06-21 15:59:14,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339804644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:14,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:14,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:14,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549249892] [2024-06-21 15:59:14,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:14,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:14,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:14,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:14,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:14,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:14,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 347 transitions, 4076 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:14,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:14,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:14,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:15,379 INFO L124 PetriNetUnfolderBase]: 3593/6237 cut-off events. [2024-06-21 15:59:15,379 INFO L125 PetriNetUnfolderBase]: For 546603/546603 co-relation queries the response was YES. [2024-06-21 15:59:15,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39769 conditions, 6237 events. 3593/6237 cut-off events. For 546603/546603 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 43469 event pairs, 1086 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 39644. Up to 5443 conditions per place. [2024-06-21 15:59:15,452 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 272 selfloop transitions, 88 changer transitions 0/369 dead transitions. [2024-06-21 15:59:15,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 369 transitions, 5235 flow [2024-06-21 15:59:15,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:15,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:15,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:59:15,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 15:59:15,453 INFO L175 Difference]: Start difference. First operand has 258 places, 347 transitions, 4076 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:59:15,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 369 transitions, 5235 flow [2024-06-21 15:59:16,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 369 transitions, 5080 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:16,658 INFO L231 Difference]: Finished difference. Result has 259 places, 350 transitions, 4157 flow [2024-06-21 15:59:16,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3925, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4157, PETRI_PLACES=259, PETRI_TRANSITIONS=350} [2024-06-21 15:59:16,659 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 15:59:16,659 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 350 transitions, 4157 flow [2024-06-21 15:59:16,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:16,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:16,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 15:59:16,659 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:16,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:16,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1004114152, now seen corresponding path program 4 times [2024-06-21 15:59:16,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:16,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732286384] [2024-06-21 15:59:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:16,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:16,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:16,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732286384] [2024-06-21 15:59:16,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732286384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:16,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:16,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:16,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807276650] [2024-06-21 15:59:16,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:16,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:16,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:16,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:16,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:16,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:16,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 350 transitions, 4157 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:16,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:16,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:16,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:17,551 INFO L124 PetriNetUnfolderBase]: 3598/6246 cut-off events. [2024-06-21 15:59:17,551 INFO L125 PetriNetUnfolderBase]: For 546993/546993 co-relation queries the response was YES. [2024-06-21 15:59:17,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39898 conditions, 6246 events. 3598/6246 cut-off events. For 546993/546993 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 43580 event pairs, 1089 based on Foata normal form. 1/6241 useless extension candidates. Maximal degree in co-relation 39773. Up to 5449 conditions per place. [2024-06-21 15:59:17,623 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 271 selfloop transitions, 91 changer transitions 0/371 dead transitions. [2024-06-21 15:59:17,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5324 flow [2024-06-21 15:59:17,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:17,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:17,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-21 15:59:17,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 15:59:17,624 INFO L175 Difference]: Start difference. First operand has 259 places, 350 transitions, 4157 flow. Second operand 6 states and 160 transitions. [2024-06-21 15:59:17,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5324 flow [2024-06-21 15:59:18,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 371 transitions, 5099 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:18,668 INFO L231 Difference]: Finished difference. Result has 259 places, 353 transitions, 4176 flow [2024-06-21 15:59:18,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3951, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4176, PETRI_PLACES=259, PETRI_TRANSITIONS=353} [2024-06-21 15:59:18,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-21 15:59:18,668 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 353 transitions, 4176 flow [2024-06-21 15:59:18,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:18,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:18,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:18,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 15:59:18,668 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:18,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -308665636, now seen corresponding path program 5 times [2024-06-21 15:59:18,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:18,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104890350] [2024-06-21 15:59:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:18,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:18,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104890350] [2024-06-21 15:59:18,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104890350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:18,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:18,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:18,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800863558] [2024-06-21 15:59:18,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:18,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:18,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:18,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:18,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:18,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:18,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 353 transitions, 4176 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:18,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:18,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:18,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:19,575 INFO L124 PetriNetUnfolderBase]: 3611/6257 cut-off events. [2024-06-21 15:59:19,575 INFO L125 PetriNetUnfolderBase]: For 563815/563815 co-relation queries the response was YES. [2024-06-21 15:59:19,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40224 conditions, 6257 events. 3611/6257 cut-off events. For 563815/563815 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43689 event pairs, 1115 based on Foata normal form. 1/6244 useless extension candidates. Maximal degree in co-relation 40098. Up to 5464 conditions per place. [2024-06-21 15:59:19,652 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 96 changer transitions 0/371 dead transitions. [2024-06-21 15:59:19,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 371 transitions, 5376 flow [2024-06-21 15:59:19,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 15:59:19,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 15:59:19,653 INFO L175 Difference]: Start difference. First operand has 259 places, 353 transitions, 4176 flow. Second operand 6 states and 153 transitions. [2024-06-21 15:59:19,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 371 transitions, 5376 flow [2024-06-21 15:59:21,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 371 transitions, 5184 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:21,211 INFO L231 Difference]: Finished difference. Result has 261 places, 359 transitions, 4282 flow [2024-06-21 15:59:21,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3996, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4282, PETRI_PLACES=261, PETRI_TRANSITIONS=359} [2024-06-21 15:59:21,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-21 15:59:21,212 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 359 transitions, 4282 flow [2024-06-21 15:59:21,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:21,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:21,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:21,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 15:59:21,212 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:21,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:21,212 INFO L85 PathProgramCache]: Analyzing trace with hash -565569766, now seen corresponding path program 6 times [2024-06-21 15:59:21,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:21,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805844192] [2024-06-21 15:59:21,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:21,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:21,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:21,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:21,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:21,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805844192] [2024-06-21 15:59:21,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805844192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:21,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:21,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 15:59:21,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60467241] [2024-06-21 15:59:21,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:21,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 15:59:21,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:21,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 15:59:21,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 15:59:21,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:21,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 359 transitions, 4282 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:21,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:21,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:21,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:22,126 INFO L124 PetriNetUnfolderBase]: 3608/6264 cut-off events. [2024-06-21 15:59:22,127 INFO L125 PetriNetUnfolderBase]: For 571316/571316 co-relation queries the response was YES. [2024-06-21 15:59:22,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40257 conditions, 6264 events. 3608/6264 cut-off events. For 571316/571316 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 43663 event pairs, 1089 based on Foata normal form. 1/6259 useless extension candidates. Maximal degree in co-relation 40130. Up to 5461 conditions per place. [2024-06-21 15:59:22,205 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 264 selfloop transitions, 101 changer transitions 0/374 dead transitions. [2024-06-21 15:59:22,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 374 transitions, 5400 flow [2024-06-21 15:59:22,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 15:59:22,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 15:59:22,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-21 15:59:22,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2024-06-21 15:59:22,206 INFO L175 Difference]: Start difference. First operand has 261 places, 359 transitions, 4282 flow. Second operand 6 states and 157 transitions. [2024-06-21 15:59:22,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 374 transitions, 5400 flow [2024-06-21 15:59:23,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 5186 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:23,718 INFO L231 Difference]: Finished difference. Result has 263 places, 359 transitions, 4276 flow [2024-06-21 15:59:23,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4068, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4276, PETRI_PLACES=263, PETRI_TRANSITIONS=359} [2024-06-21 15:59:23,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 15:59:23,718 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 359 transitions, 4276 flow [2024-06-21 15:59:23,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:23,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:23,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:23,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 15:59:23,719 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:23,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:23,719 INFO L85 PathProgramCache]: Analyzing trace with hash -313427236, now seen corresponding path program 7 times [2024-06-21 15:59:23,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:23,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747121453] [2024-06-21 15:59:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:23,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:23,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:23,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:23,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747121453] [2024-06-21 15:59:23,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747121453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:23,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:23,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:23,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956288236] [2024-06-21 15:59:23,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:23,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:23,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:23,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:23,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:23,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:23,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 359 transitions, 4276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:23,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:23,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:23,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:24,666 INFO L124 PetriNetUnfolderBase]: 3613/6249 cut-off events. [2024-06-21 15:59:24,666 INFO L125 PetriNetUnfolderBase]: For 584496/584496 co-relation queries the response was YES. [2024-06-21 15:59:24,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40392 conditions, 6249 events. 3613/6249 cut-off events. For 584496/584496 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 43535 event pairs, 1108 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40266. Up to 5467 conditions per place. [2024-06-21 15:59:24,738 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 261 selfloop transitions, 104 changer transitions 0/374 dead transitions. [2024-06-21 15:59:24,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 374 transitions, 5264 flow [2024-06-21 15:59:24,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 15:59:24,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 15:59:24,739 INFO L175 Difference]: Start difference. First operand has 263 places, 359 transitions, 4276 flow. Second operand 7 states and 175 transitions. [2024-06-21 15:59:24,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 374 transitions, 5264 flow [2024-06-21 15:59:26,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 374 transitions, 4889 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 15:59:26,410 INFO L231 Difference]: Finished difference. Result has 263 places, 362 transitions, 4167 flow [2024-06-21 15:59:26,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4167, PETRI_PLACES=263, PETRI_TRANSITIONS=362} [2024-06-21 15:59:26,411 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-21 15:59:26,411 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 362 transitions, 4167 flow [2024-06-21 15:59:26,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:26,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:26,411 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] [2024-06-21 15:59:26,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 15:59:26,411 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:26,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 2100307012, now seen corresponding path program 8 times [2024-06-21 15:59:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:26,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474872168] [2024-06-21 15:59:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:26,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:26,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:26,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:26,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474872168] [2024-06-21 15:59:26,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474872168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:26,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:26,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:26,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243784470] [2024-06-21 15:59:26,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:26,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:26,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:26,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:26,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:26,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:26,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 362 transitions, 4167 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:26,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:26,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:26,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:27,476 INFO L124 PetriNetUnfolderBase]: 3610/6249 cut-off events. [2024-06-21 15:59:27,476 INFO L125 PetriNetUnfolderBase]: For 590582/590582 co-relation queries the response was YES. [2024-06-21 15:59:27,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40312 conditions, 6249 events. 3610/6249 cut-off events. For 590582/590582 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43578 event pairs, 1103 based on Foata normal form. 1/6236 useless extension candidates. Maximal degree in co-relation 40186. Up to 5464 conditions per place. [2024-06-21 15:59:27,536 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 101 changer transitions 0/376 dead transitions. [2024-06-21 15:59:27,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 376 transitions, 5113 flow [2024-06-21 15:59:27,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 15:59:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 15:59:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 215 transitions. [2024-06-21 15:59:27,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5687830687830688 [2024-06-21 15:59:27,537 INFO L175 Difference]: Start difference. First operand has 263 places, 362 transitions, 4167 flow. Second operand 9 states and 215 transitions. [2024-06-21 15:59:27,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 376 transitions, 5113 flow [2024-06-21 15:59:28,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 376 transitions, 4956 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 15:59:28,844 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 4218 flow [2024-06-21 15:59:28,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4010, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4218, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-21 15:59:28,844 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-21 15:59:28,844 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 4218 flow [2024-06-21 15:59:28,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:28,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:28,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:28,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 15:59:28,845 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:28,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash -386748126, now seen corresponding path program 9 times [2024-06-21 15:59:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:28,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469506575] [2024-06-21 15:59:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:28,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:28,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:28,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:28,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:28,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469506575] [2024-06-21 15:59:28,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469506575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:28,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:28,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:28,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000011890] [2024-06-21 15:59:28,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:28,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:28,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:28,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:28,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:28,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:28,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 4218 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:28,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:28,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:28,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:29,799 INFO L124 PetriNetUnfolderBase]: 3607/6245 cut-off events. [2024-06-21 15:59:29,799 INFO L125 PetriNetUnfolderBase]: For 599720/599720 co-relation queries the response was YES. [2024-06-21 15:59:29,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40342 conditions, 6245 events. 3607/6245 cut-off events. For 599720/599720 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 43535 event pairs, 1103 based on Foata normal form. 1/6232 useless extension candidates. Maximal degree in co-relation 40214. Up to 5461 conditions per place. [2024-06-21 15:59:29,872 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 265 selfloop transitions, 99 changer transitions 0/373 dead transitions. [2024-06-21 15:59:29,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 373 transitions, 4972 flow [2024-06-21 15:59:29,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:29,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 15:59:29,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-21 15:59:29,872 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 4218 flow. Second operand 7 states and 173 transitions. [2024-06-21 15:59:29,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 373 transitions, 4972 flow [2024-06-21 15:59:31,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 373 transitions, 4572 flow, removed 11 selfloop flow, removed 11 redundant places. [2024-06-21 15:59:31,769 INFO L231 Difference]: Finished difference. Result has 264 places, 362 transitions, 4023 flow [2024-06-21 15:59:31,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3818, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4023, PETRI_PLACES=264, PETRI_TRANSITIONS=362} [2024-06-21 15:59:31,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-21 15:59:31,770 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 362 transitions, 4023 flow [2024-06-21 15:59:31,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:31,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:31,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:31,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 15:59:31,770 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:31,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:31,770 INFO L85 PathProgramCache]: Analyzing trace with hash 887014298, now seen corresponding path program 1 times [2024-06-21 15:59:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:31,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265685621] [2024-06-21 15:59:31,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:31,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:31,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:31,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265685621] [2024-06-21 15:59:31,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265685621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:31,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:31,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:31,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23309962] [2024-06-21 15:59:31,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:31,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:31,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:31,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:31,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 362 transitions, 4023 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:31,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:31,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:31,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:32,826 INFO L124 PetriNetUnfolderBase]: 3739/6468 cut-off events. [2024-06-21 15:59:32,826 INFO L125 PetriNetUnfolderBase]: For 727256/727256 co-relation queries the response was YES. [2024-06-21 15:59:32,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43183 conditions, 6468 events. 3739/6468 cut-off events. For 727256/727256 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 45308 event pairs, 1004 based on Foata normal form. 12/6474 useless extension candidates. Maximal degree in co-relation 43056. Up to 5319 conditions per place. [2024-06-21 15:59:32,898 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 316 selfloop transitions, 68 changer transitions 0/393 dead transitions. [2024-06-21 15:59:32,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 393 transitions, 5191 flow [2024-06-21 15:59:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:32,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:32,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 15:59:32,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 15:59:32,899 INFO L175 Difference]: Start difference. First operand has 264 places, 362 transitions, 4023 flow. Second operand 7 states and 185 transitions. [2024-06-21 15:59:32,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 393 transitions, 5191 flow [2024-06-21 15:59:34,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 393 transitions, 4993 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:34,903 INFO L231 Difference]: Finished difference. Result has 266 places, 366 transitions, 4119 flow [2024-06-21 15:59:34,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3825, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4119, PETRI_PLACES=266, PETRI_TRANSITIONS=366} [2024-06-21 15:59:34,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-21 15:59:34,903 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 366 transitions, 4119 flow [2024-06-21 15:59:34,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:34,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:34,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:34,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 15:59:34,904 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:34,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:34,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1722793698, now seen corresponding path program 2 times [2024-06-21 15:59:34,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:34,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793129819] [2024-06-21 15:59:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:34,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:34,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:34,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:34,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:34,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793129819] [2024-06-21 15:59:34,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793129819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:34,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:34,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:34,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324300989] [2024-06-21 15:59:34,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:34,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:34,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:35,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:35,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 366 transitions, 4119 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:35,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:35,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:35,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:35,938 INFO L124 PetriNetUnfolderBase]: 3782/6564 cut-off events. [2024-06-21 15:59:35,938 INFO L125 PetriNetUnfolderBase]: For 750336/750336 co-relation queries the response was YES. [2024-06-21 15:59:35,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44068 conditions, 6564 events. 3782/6564 cut-off events. For 750336/750336 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 46368 event pairs, 1106 based on Foata normal form. 16/6574 useless extension candidates. Maximal degree in co-relation 43939. Up to 5752 conditions per place. [2024-06-21 15:59:36,014 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 313 selfloop transitions, 64 changer transitions 0/386 dead transitions. [2024-06-21 15:59:36,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 386 transitions, 4988 flow [2024-06-21 15:59:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:59:36,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 15:59:36,015 INFO L175 Difference]: Start difference. First operand has 266 places, 366 transitions, 4119 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:59:36,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 386 transitions, 4988 flow [2024-06-21 15:59:37,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 386 transitions, 4881 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-21 15:59:37,978 INFO L231 Difference]: Finished difference. Result has 270 places, 368 transitions, 4214 flow [2024-06-21 15:59:37,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4014, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4214, PETRI_PLACES=270, PETRI_TRANSITIONS=368} [2024-06-21 15:59:37,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 227 predicate places. [2024-06-21 15:59:37,979 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 368 transitions, 4214 flow [2024-06-21 15:59:37,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:37,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:37,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:37,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 15:59:37,979 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:37,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:37,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1723149888, now seen corresponding path program 3 times [2024-06-21 15:59:37,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:37,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852833329] [2024-06-21 15:59:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:37,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:38,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:38,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852833329] [2024-06-21 15:59:38,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852833329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:38,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:38,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:38,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529686240] [2024-06-21 15:59:38,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:38,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:38,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:38,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 368 transitions, 4214 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:38,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:38,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:38,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:39,033 INFO L124 PetriNetUnfolderBase]: 3789/6583 cut-off events. [2024-06-21 15:59:39,033 INFO L125 PetriNetUnfolderBase]: For 725136/725136 co-relation queries the response was YES. [2024-06-21 15:59:39,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43872 conditions, 6583 events. 3789/6583 cut-off events. For 725136/725136 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 46516 event pairs, 1099 based on Foata normal form. 12/6589 useless extension candidates. Maximal degree in co-relation 43741. Up to 5677 conditions per place. [2024-06-21 15:59:39,111 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 313 selfloop transitions, 69 changer transitions 0/391 dead transitions. [2024-06-21 15:59:39,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 391 transitions, 5109 flow [2024-06-21 15:59:39,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:39,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 15:59:39,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 15:59:39,112 INFO L175 Difference]: Start difference. First operand has 270 places, 368 transitions, 4214 flow. Second operand 7 states and 182 transitions. [2024-06-21 15:59:39,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 391 transitions, 5109 flow [2024-06-21 15:59:41,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 391 transitions, 4950 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:41,392 INFO L231 Difference]: Finished difference. Result has 272 places, 370 transitions, 4263 flow [2024-06-21 15:59:41,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4055, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4263, PETRI_PLACES=272, PETRI_TRANSITIONS=370} [2024-06-21 15:59:41,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-21 15:59:41,392 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 370 transitions, 4263 flow [2024-06-21 15:59:41,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:41,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:41,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:41,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 15:59:41,393 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:41,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1635696000, now seen corresponding path program 4 times [2024-06-21 15:59:41,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:41,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952454350] [2024-06-21 15:59:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:41,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:41,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:41,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:41,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952454350] [2024-06-21 15:59:41,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952454350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:41,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:41,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:41,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509201991] [2024-06-21 15:59:41,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:41,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:41,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:41,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:41,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:41,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:41,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 370 transitions, 4263 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:41,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:41,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:41,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:42,425 INFO L124 PetriNetUnfolderBase]: 3845/6650 cut-off events. [2024-06-21 15:59:42,425 INFO L125 PetriNetUnfolderBase]: For 760699/760699 co-relation queries the response was YES. [2024-06-21 15:59:42,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44511 conditions, 6650 events. 3845/6650 cut-off events. For 760699/760699 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 46953 event pairs, 1175 based on Foata normal form. 16/6652 useless extension candidates. Maximal degree in co-relation 44379. Up to 5771 conditions per place. [2024-06-21 15:59:42,503 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 101 changer transitions 0/387 dead transitions. [2024-06-21 15:59:42,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 387 transitions, 5129 flow [2024-06-21 15:59:42,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:42,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:42,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 15:59:42,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 15:59:42,504 INFO L175 Difference]: Start difference. First operand has 272 places, 370 transitions, 4263 flow. Second operand 7 states and 176 transitions. [2024-06-21 15:59:42,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 387 transitions, 5129 flow [2024-06-21 15:59:44,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 387 transitions, 4944 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:44,994 INFO L231 Difference]: Finished difference. Result has 274 places, 372 transitions, 4352 flow [2024-06-21 15:59:44,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4078, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4352, PETRI_PLACES=274, PETRI_TRANSITIONS=372} [2024-06-21 15:59:44,994 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-21 15:59:44,994 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 372 transitions, 4352 flow [2024-06-21 15:59:44,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:44,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:44,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:44,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 15:59:44,995 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:44,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1635339810, now seen corresponding path program 5 times [2024-06-21 15:59:44,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:44,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125512835] [2024-06-21 15:59:44,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:44,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:45,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:45,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:45,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125512835] [2024-06-21 15:59:45,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125512835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:45,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:45,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:45,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48934689] [2024-06-21 15:59:45,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:45,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:45,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:45,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:45,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:45,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:45,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 372 transitions, 4352 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:45,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:45,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:45,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:46,056 INFO L124 PetriNetUnfolderBase]: 3964/6839 cut-off events. [2024-06-21 15:59:46,056 INFO L125 PetriNetUnfolderBase]: For 826611/826611 co-relation queries the response was YES. [2024-06-21 15:59:46,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47318 conditions, 6839 events. 3964/6839 cut-off events. For 826611/826611 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 48474 event pairs, 1196 based on Foata normal form. 12/6837 useless extension candidates. Maximal degree in co-relation 47185. Up to 5712 conditions per place. [2024-06-21 15:59:46,139 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 277 selfloop transitions, 109 changer transitions 0/395 dead transitions. [2024-06-21 15:59:46,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 395 transitions, 5512 flow [2024-06-21 15:59:46,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:46,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 15:59:46,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 15:59:46,140 INFO L175 Difference]: Start difference. First operand has 274 places, 372 transitions, 4352 flow. Second operand 7 states and 179 transitions. [2024-06-21 15:59:46,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 395 transitions, 5512 flow [2024-06-21 15:59:48,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 395 transitions, 5262 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:48,955 INFO L231 Difference]: Finished difference. Result has 276 places, 376 transitions, 4462 flow [2024-06-21 15:59:48,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4462, PETRI_PLACES=276, PETRI_TRANSITIONS=376} [2024-06-21 15:59:48,956 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-21 15:59:48,956 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 376 transitions, 4462 flow [2024-06-21 15:59:48,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:48,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:48,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:48,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 15:59:48,956 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:48,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:48,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2035193310, now seen corresponding path program 6 times [2024-06-21 15:59:48,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:48,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806198841] [2024-06-21 15:59:48,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:48,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:48,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:49,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:49,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:49,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806198841] [2024-06-21 15:59:49,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806198841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:49,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:49,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:49,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10972419] [2024-06-21 15:59:49,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:49,019 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:49,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:49,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:49,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:49,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:49,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 376 transitions, 4462 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:49,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:49,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:49,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:50,060 INFO L124 PetriNetUnfolderBase]: 3928/6787 cut-off events. [2024-06-21 15:59:50,060 INFO L125 PetriNetUnfolderBase]: For 783944/783944 co-relation queries the response was YES. [2024-06-21 15:59:50,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45322 conditions, 6787 events. 3928/6787 cut-off events. For 783944/783944 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 48131 event pairs, 1192 based on Foata normal form. 16/6789 useless extension candidates. Maximal degree in co-relation 45188. Up to 5904 conditions per place. [2024-06-21 15:59:50,135 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 276 selfloop transitions, 106 changer transitions 0/391 dead transitions. [2024-06-21 15:59:50,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 391 transitions, 5274 flow [2024-06-21 15:59:50,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:50,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:50,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 15:59:50,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 15:59:50,137 INFO L175 Difference]: Start difference. First operand has 276 places, 376 transitions, 4462 flow. Second operand 7 states and 177 transitions. [2024-06-21 15:59:50,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 391 transitions, 5274 flow [2024-06-21 15:59:53,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 391 transitions, 4955 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 15:59:53,117 INFO L231 Difference]: Finished difference. Result has 278 places, 376 transitions, 4361 flow [2024-06-21 15:59:53,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4143, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4361, PETRI_PLACES=278, PETRI_TRANSITIONS=376} [2024-06-21 15:59:53,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-21 15:59:53,118 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 376 transitions, 4361 flow [2024-06-21 15:59:53,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:53,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:53,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:53,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 15:59:53,118 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:53,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:53,118 INFO L85 PathProgramCache]: Analyzing trace with hash 2049491006, now seen corresponding path program 1 times [2024-06-21 15:59:53,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:53,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885468476] [2024-06-21 15:59:53,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:53,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:53,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:53,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:53,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885468476] [2024-06-21 15:59:53,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885468476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:53,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:53,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:53,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891167286] [2024-06-21 15:59:53,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:53,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:53,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:53,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:53,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:53,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:53,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 376 transitions, 4361 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:53,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:53,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:53,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:54,212 INFO L124 PetriNetUnfolderBase]: 4014/6931 cut-off events. [2024-06-21 15:59:54,212 INFO L125 PetriNetUnfolderBase]: For 816443/816443 co-relation queries the response was YES. [2024-06-21 15:59:54,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46702 conditions, 6931 events. 4014/6931 cut-off events. For 816443/816443 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 49282 event pairs, 1195 based on Foata normal form. 12/6929 useless extension candidates. Maximal degree in co-relation 46568. Up to 5788 conditions per place. [2024-06-21 15:59:54,292 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 116 changer transitions 0/398 dead transitions. [2024-06-21 15:59:54,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 398 transitions, 5499 flow [2024-06-21 15:59:54,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:54,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:54,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 15:59:54,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 15:59:54,293 INFO L175 Difference]: Start difference. First operand has 278 places, 376 transitions, 4361 flow. Second operand 7 states and 181 transitions. [2024-06-21 15:59:54,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 398 transitions, 5499 flow [2024-06-21 15:59:56,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 398 transitions, 5262 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 15:59:56,819 INFO L231 Difference]: Finished difference. Result has 279 places, 379 transitions, 4467 flow [2024-06-21 15:59:56,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4124, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4467, PETRI_PLACES=279, PETRI_TRANSITIONS=379} [2024-06-21 15:59:56,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-21 15:59:56,820 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 379 transitions, 4467 flow [2024-06-21 15:59:56,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:56,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 15:59:56,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 15:59:56,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 15:59:56,820 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 15:59:56,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 15:59:56,821 INFO L85 PathProgramCache]: Analyzing trace with hash -874916960, now seen corresponding path program 2 times [2024-06-21 15:59:56,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 15:59:56,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617768168] [2024-06-21 15:59:56,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 15:59:56,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 15:59:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 15:59:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 15:59:56,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 15:59:56,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617768168] [2024-06-21 15:59:56,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617768168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 15:59:56,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 15:59:56,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 15:59:56,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056649315] [2024-06-21 15:59:56,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 15:59:56,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 15:59:56,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 15:59:56,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 15:59:56,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 15:59:56,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 15:59:56,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 379 transitions, 4467 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 15:59:56,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 15:59:56,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 15:59:56,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 15:59:57,927 INFO L124 PetriNetUnfolderBase]: 4054/6995 cut-off events. [2024-06-21 15:59:57,927 INFO L125 PetriNetUnfolderBase]: For 836673/836673 co-relation queries the response was YES. [2024-06-21 15:59:57,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47494 conditions, 6995 events. 4054/6995 cut-off events. For 836673/836673 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 49811 event pairs, 1216 based on Foata normal form. 12/6993 useless extension candidates. Maximal degree in co-relation 47359. Up to 6030 conditions per place. [2024-06-21 15:59:58,010 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 284 selfloop transitions, 106 changer transitions 0/399 dead transitions. [2024-06-21 15:59:58,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 5377 flow [2024-06-21 15:59:58,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 15:59:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 15:59:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 15:59:58,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 15:59:58,011 INFO L175 Difference]: Start difference. First operand has 279 places, 379 transitions, 4467 flow. Second operand 7 states and 180 transitions. [2024-06-21 15:59:58,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 5377 flow [2024-06-21 16:00:00,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5184 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:00,389 INFO L231 Difference]: Finished difference. Result has 283 places, 381 transitions, 4565 flow [2024-06-21 16:00:00,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4274, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4565, PETRI_PLACES=283, PETRI_TRANSITIONS=381} [2024-06-21 16:00:00,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 16:00:00,389 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 381 transitions, 4565 flow [2024-06-21 16:00:00,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:00,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:00,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:00,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:00:00,390 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:00,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash -361022210, now seen corresponding path program 3 times [2024-06-21 16:00:00,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:00,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646487083] [2024-06-21 16:00:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:00,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:00,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:00,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646487083] [2024-06-21 16:00:00,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646487083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:00,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:00,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:00,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706833594] [2024-06-21 16:00:00,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:00,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:00,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:00,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:00,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:00,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:00,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 381 transitions, 4565 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:00,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:00,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:00,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:01,615 INFO L124 PetriNetUnfolderBase]: 4107/7094 cut-off events. [2024-06-21 16:00:01,615 INFO L125 PetriNetUnfolderBase]: For 863670/863670 co-relation queries the response was YES. [2024-06-21 16:00:01,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48824 conditions, 7094 events. 4107/7094 cut-off events. For 863670/863670 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 50660 event pairs, 1222 based on Foata normal form. 12/7092 useless extension candidates. Maximal degree in co-relation 48687. Up to 5557 conditions per place. [2024-06-21 16:00:01,703 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 269 selfloop transitions, 126 changer transitions 0/404 dead transitions. [2024-06-21 16:00:01,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 404 transitions, 5757 flow [2024-06-21 16:00:01,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:01,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:00:01,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 16:00:01,704 INFO L175 Difference]: Start difference. First operand has 283 places, 381 transitions, 4565 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:00:01,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 404 transitions, 5757 flow [2024-06-21 16:00:05,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 404 transitions, 5486 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:05,045 INFO L231 Difference]: Finished difference. Result has 285 places, 383 transitions, 4633 flow [2024-06-21 16:00:05,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4633, PETRI_PLACES=285, PETRI_TRANSITIONS=383} [2024-06-21 16:00:05,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 16:00:05,045 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 383 transitions, 4633 flow [2024-06-21 16:00:05,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:05,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:05,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:05,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:00:05,046 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:05,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1479748878, now seen corresponding path program 1 times [2024-06-21 16:00:05,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:05,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318096562] [2024-06-21 16:00:05,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:05,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:05,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:05,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:05,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:05,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318096562] [2024-06-21 16:00:05,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318096562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:05,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:05,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:00:05,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047974150] [2024-06-21 16:00:05,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:05,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:00:05,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:05,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:00:05,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:00:05,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:05,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 383 transitions, 4633 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:05,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:05,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:05,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:06,145 INFO L124 PetriNetUnfolderBase]: 4115/7134 cut-off events. [2024-06-21 16:00:06,145 INFO L125 PetriNetUnfolderBase]: For 827914/827914 co-relation queries the response was YES. [2024-06-21 16:00:06,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49104 conditions, 7134 events. 4115/7134 cut-off events. For 827914/827914 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 51047 event pairs, 1201 based on Foata normal form. 2/7132 useless extension candidates. Maximal degree in co-relation 48966. Up to 6406 conditions per place. [2024-06-21 16:00:06,234 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 354 selfloop transitions, 39 changer transitions 0/402 dead transitions. [2024-06-21 16:00:06,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 402 transitions, 5523 flow [2024-06-21 16:00:06,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:06,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:06,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 16:00:06,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:00:06,235 INFO L175 Difference]: Start difference. First operand has 285 places, 383 transitions, 4633 flow. Second operand 6 states and 156 transitions. [2024-06-21 16:00:06,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 402 transitions, 5523 flow [2024-06-21 16:00:09,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 402 transitions, 5323 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:09,146 INFO L231 Difference]: Finished difference. Result has 287 places, 385 transitions, 4582 flow [2024-06-21 16:00:09,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4582, PETRI_PLACES=287, PETRI_TRANSITIONS=385} [2024-06-21 16:00:09,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 16:00:09,146 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 385 transitions, 4582 flow [2024-06-21 16:00:09,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:09,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:09,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:09,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:00:09,147 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:09,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:09,147 INFO L85 PathProgramCache]: Analyzing trace with hash -474472802, now seen corresponding path program 2 times [2024-06-21 16:00:09,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:09,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480614525] [2024-06-21 16:00:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:09,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:09,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:09,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480614525] [2024-06-21 16:00:09,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480614525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:09,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:09,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:00:09,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920012023] [2024-06-21 16:00:09,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:09,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:00:09,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:09,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:00:09,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:00:09,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:09,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 385 transitions, 4582 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:09,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:09,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:09,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:10,252 INFO L124 PetriNetUnfolderBase]: 4136/7169 cut-off events. [2024-06-21 16:00:10,253 INFO L125 PetriNetUnfolderBase]: For 850832/850832 co-relation queries the response was YES. [2024-06-21 16:00:10,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49488 conditions, 7169 events. 4136/7169 cut-off events. For 850832/850832 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 51355 event pairs, 1202 based on Foata normal form. 2/7167 useless extension candidates. Maximal degree in co-relation 49349. Up to 6392 conditions per place. [2024-06-21 16:00:10,342 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 351 selfloop transitions, 45 changer transitions 0/405 dead transitions. [2024-06-21 16:00:10,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 405 transitions, 5748 flow [2024-06-21 16:00:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 16:00:10,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 16:00:10,343 INFO L175 Difference]: Start difference. First operand has 287 places, 385 transitions, 4582 flow. Second operand 6 states and 153 transitions. [2024-06-21 16:00:10,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 405 transitions, 5748 flow [2024-06-21 16:00:13,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 405 transitions, 5621 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:13,546 INFO L231 Difference]: Finished difference. Result has 289 places, 389 transitions, 4687 flow [2024-06-21 16:00:13,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4455, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4687, PETRI_PLACES=289, PETRI_TRANSITIONS=389} [2024-06-21 16:00:13,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-21 16:00:13,547 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 389 transitions, 4687 flow [2024-06-21 16:00:13,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:13,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:13,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:13,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:00:13,547 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:13,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:13,547 INFO L85 PathProgramCache]: Analyzing trace with hash 965290846, now seen corresponding path program 3 times [2024-06-21 16:00:13,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:13,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276692873] [2024-06-21 16:00:13,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:13,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:13,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:13,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:13,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276692873] [2024-06-21 16:00:13,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276692873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:13,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:13,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:00:13,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955077886] [2024-06-21 16:00:13,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:13,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:00:13,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:13,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:00:13,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:00:13,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:13,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 389 transitions, 4687 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:13,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:13,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:13,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:14,685 INFO L124 PetriNetUnfolderBase]: 4131/7161 cut-off events. [2024-06-21 16:00:14,685 INFO L125 PetriNetUnfolderBase]: For 856187/856187 co-relation queries the response was YES. [2024-06-21 16:00:14,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49336 conditions, 7161 events. 4131/7161 cut-off events. For 856187/856187 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 51273 event pairs, 1199 based on Foata normal form. 2/7156 useless extension candidates. Maximal degree in co-relation 49196. Up to 6430 conditions per place. [2024-06-21 16:00:14,778 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 360 selfloop transitions, 40 changer transitions 0/409 dead transitions. [2024-06-21 16:00:14,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 409 transitions, 5537 flow [2024-06-21 16:00:14,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:14,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:14,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:00:14,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 16:00:14,779 INFO L175 Difference]: Start difference. First operand has 289 places, 389 transitions, 4687 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:00:14,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 409 transitions, 5537 flow [2024-06-21 16:00:18,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 409 transitions, 5395 flow, removed 50 selfloop flow, removed 2 redundant places. [2024-06-21 16:00:18,304 INFO L231 Difference]: Finished difference. Result has 293 places, 389 transitions, 4630 flow [2024-06-21 16:00:18,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4545, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4630, PETRI_PLACES=293, PETRI_TRANSITIONS=389} [2024-06-21 16:00:18,304 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 16:00:18,304 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 389 transitions, 4630 flow [2024-06-21 16:00:18,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:18,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:18,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:18,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:00:18,305 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:18,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:18,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1250681054, now seen corresponding path program 4 times [2024-06-21 16:00:18,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:18,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437660492] [2024-06-21 16:00:18,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:18,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:18,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:18,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437660492] [2024-06-21 16:00:18,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437660492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:18,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:18,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:00:18,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149909646] [2024-06-21 16:00:18,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:18,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:00:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:00:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:00:18,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:18,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 389 transitions, 4630 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:18,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:18,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:18,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:19,402 INFO L124 PetriNetUnfolderBase]: 4139/7173 cut-off events. [2024-06-21 16:00:19,403 INFO L125 PetriNetUnfolderBase]: For 871315/871315 co-relation queries the response was YES. [2024-06-21 16:00:19,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49606 conditions, 7173 events. 4139/7173 cut-off events. For 871315/871315 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 51401 event pairs, 1195 based on Foata normal form. 2/7168 useless extension candidates. Maximal degree in co-relation 49464. Up to 6416 conditions per place. [2024-06-21 16:00:19,491 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 357 selfloop transitions, 43 changer transitions 0/409 dead transitions. [2024-06-21 16:00:19,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 409 transitions, 5544 flow [2024-06-21 16:00:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:19,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:19,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 16:00:19,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2024-06-21 16:00:19,492 INFO L175 Difference]: Start difference. First operand has 293 places, 389 transitions, 4630 flow. Second operand 6 states and 155 transitions. [2024-06-21 16:00:19,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 409 transitions, 5544 flow [2024-06-21 16:00:23,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 409 transitions, 5441 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:23,221 INFO L231 Difference]: Finished difference. Result has 294 places, 391 transitions, 4692 flow [2024-06-21 16:00:23,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4527, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4692, PETRI_PLACES=294, PETRI_TRANSITIONS=391} [2024-06-21 16:00:23,222 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-21 16:00:23,222 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 391 transitions, 4692 flow [2024-06-21 16:00:23,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:23,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:23,222 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] [2024-06-21 16:00:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:00:23,222 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:23,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash -449911168, now seen corresponding path program 5 times [2024-06-21 16:00:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:23,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788657835] [2024-06-21 16:00:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:23,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:23,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:23,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788657835] [2024-06-21 16:00:23,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788657835] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:23,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:23,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:00:23,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56145129] [2024-06-21 16:00:23,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:23,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:00:23,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:00:23,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:00:23,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:23,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 391 transitions, 4692 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:23,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:23,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:23,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:24,395 INFO L124 PetriNetUnfolderBase]: 4147/7187 cut-off events. [2024-06-21 16:00:24,395 INFO L125 PetriNetUnfolderBase]: For 889813/889813 co-relation queries the response was YES. [2024-06-21 16:00:24,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49959 conditions, 7187 events. 4147/7187 cut-off events. For 889813/889813 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 51604 event pairs, 1181 based on Foata normal form. 2/7180 useless extension candidates. Maximal degree in co-relation 49816. Up to 6317 conditions per place. [2024-06-21 16:00:24,476 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 347 selfloop transitions, 52 changer transitions 0/408 dead transitions. [2024-06-21 16:00:24,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 408 transitions, 5847 flow [2024-06-21 16:00:24,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:24,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 16:00:24,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5912698412698413 [2024-06-21 16:00:24,477 INFO L175 Difference]: Start difference. First operand has 294 places, 391 transitions, 4692 flow. Second operand 6 states and 149 transitions. [2024-06-21 16:00:24,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 408 transitions, 5847 flow [2024-06-21 16:00:27,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 408 transitions, 5704 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:27,750 INFO L231 Difference]: Finished difference. Result has 296 places, 394 transitions, 4775 flow [2024-06-21 16:00:27,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4549, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4775, PETRI_PLACES=296, PETRI_TRANSITIONS=394} [2024-06-21 16:00:27,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-21 16:00:27,750 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 394 transitions, 4775 flow [2024-06-21 16:00:27,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:27,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:27,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:27,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:00:27,750 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:27,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:27,751 INFO L85 PathProgramCache]: Analyzing trace with hash -470304464, now seen corresponding path program 6 times [2024-06-21 16:00:27,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:27,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413085421] [2024-06-21 16:00:27,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:27,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:27,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413085421] [2024-06-21 16:00:27,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413085421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:27,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:27,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:00:27,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877735263] [2024-06-21 16:00:27,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:27,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:00:27,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:27,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:00:27,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:00:27,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:27,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 394 transitions, 4775 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:27,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:27,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:27,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:28,878 INFO L124 PetriNetUnfolderBase]: 4142/7180 cut-off events. [2024-06-21 16:00:28,878 INFO L125 PetriNetUnfolderBase]: For 894397/894397 co-relation queries the response was YES. [2024-06-21 16:00:28,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49796 conditions, 7180 events. 4142/7180 cut-off events. For 894397/894397 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 51611 event pairs, 1181 based on Foata normal form. 2/7173 useless extension candidates. Maximal degree in co-relation 49652. Up to 6313 conditions per place. [2024-06-21 16:00:28,967 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 345 selfloop transitions, 53 changer transitions 0/407 dead transitions. [2024-06-21 16:00:28,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 407 transitions, 5601 flow [2024-06-21 16:00:28,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:00:28,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:00:28,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 16:00:28,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-21 16:00:28,968 INFO L175 Difference]: Start difference. First operand has 296 places, 394 transitions, 4775 flow. Second operand 6 states and 148 transitions. [2024-06-21 16:00:28,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 407 transitions, 5601 flow [2024-06-21 16:00:31,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 407 transitions, 5400 flow, removed 61 selfloop flow, removed 3 redundant places. [2024-06-21 16:00:31,977 INFO L231 Difference]: Finished difference. Result has 299 places, 394 transitions, 4685 flow [2024-06-21 16:00:31,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4574, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4685, PETRI_PLACES=299, PETRI_TRANSITIONS=394} [2024-06-21 16:00:31,978 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 256 predicate places. [2024-06-21 16:00:31,978 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 394 transitions, 4685 flow [2024-06-21 16:00:31,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:31,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:31,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:31,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:00:31,978 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:31,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:31,978 INFO L85 PathProgramCache]: Analyzing trace with hash -883442012, now seen corresponding path program 1 times [2024-06-21 16:00:31,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:31,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872232107] [2024-06-21 16:00:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:31,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:31,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:32,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:32,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872232107] [2024-06-21 16:00:32,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872232107] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:32,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:32,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:32,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681863819] [2024-06-21 16:00:32,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:32,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:32,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:32,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:32,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:32,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:32,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 394 transitions, 4685 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:32,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:32,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:32,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:33,226 INFO L124 PetriNetUnfolderBase]: 4340/7504 cut-off events. [2024-06-21 16:00:33,226 INFO L125 PetriNetUnfolderBase]: For 1119503/1119503 co-relation queries the response was YES. [2024-06-21 16:00:33,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55044 conditions, 7504 events. 4340/7504 cut-off events. For 1119503/1119503 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 54117 event pairs, 1059 based on Foata normal form. 12/7512 useless extension candidates. Maximal degree in co-relation 54899. Up to 5948 conditions per place. [2024-06-21 16:00:33,323 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 93 changer transitions 0/435 dead transitions. [2024-06-21 16:00:33,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 435 transitions, 6325 flow [2024-06-21 16:00:33,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:00:33,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:00:33,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-21 16:00:33,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6216931216931217 [2024-06-21 16:00:33,324 INFO L175 Difference]: Start difference. First operand has 299 places, 394 transitions, 4685 flow. Second operand 9 states and 235 transitions. [2024-06-21 16:00:33,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 435 transitions, 6325 flow [2024-06-21 16:00:36,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 435 transitions, 6204 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:36,464 INFO L231 Difference]: Finished difference. Result has 304 places, 399 transitions, 4939 flow [2024-06-21 16:00:36,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4939, PETRI_PLACES=304, PETRI_TRANSITIONS=399} [2024-06-21 16:00:36,465 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-21 16:00:36,465 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 399 transitions, 4939 flow [2024-06-21 16:00:36,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:36,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:36,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:36,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:00:36,466 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:36,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:36,466 INFO L85 PathProgramCache]: Analyzing trace with hash -637524926, now seen corresponding path program 2 times [2024-06-21 16:00:36,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:36,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450336017] [2024-06-21 16:00:36,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:36,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:36,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:36,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:36,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450336017] [2024-06-21 16:00:36,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450336017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:36,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:36,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:36,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997586073] [2024-06-21 16:00:36,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:36,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:36,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:36,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:36,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 399 transitions, 4939 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:36,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:36,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:36,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:37,765 INFO L124 PetriNetUnfolderBase]: 4387/7602 cut-off events. [2024-06-21 16:00:37,765 INFO L125 PetriNetUnfolderBase]: For 1144741/1144741 co-relation queries the response was YES. [2024-06-21 16:00:37,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56293 conditions, 7602 events. 4387/7602 cut-off events. For 1144741/1144741 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 55071 event pairs, 1276 based on Foata normal form. 12/7610 useless extension candidates. Maximal degree in co-relation 56146. Up to 6472 conditions per place. [2024-06-21 16:00:37,868 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 82 changer transitions 0/429 dead transitions. [2024-06-21 16:00:37,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 429 transitions, 6223 flow [2024-06-21 16:00:37,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:37,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 16:00:37,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-21 16:00:37,869 INFO L175 Difference]: Start difference. First operand has 304 places, 399 transitions, 4939 flow. Second operand 8 states and 207 transitions. [2024-06-21 16:00:37,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 429 transitions, 6223 flow [2024-06-21 16:00:40,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 429 transitions, 6058 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 16:00:40,913 INFO L231 Difference]: Finished difference. Result has 309 places, 402 transitions, 5078 flow [2024-06-21 16:00:40,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4776, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5078, PETRI_PLACES=309, PETRI_TRANSITIONS=402} [2024-06-21 16:00:40,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-21 16:00:40,914 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 402 transitions, 5078 flow [2024-06-21 16:00:40,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:40,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:40,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:40,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:00:40,914 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:40,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:40,914 INFO L85 PathProgramCache]: Analyzing trace with hash 319267840, now seen corresponding path program 3 times [2024-06-21 16:00:40,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:40,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905517537] [2024-06-21 16:00:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:40,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:40,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:40,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905517537] [2024-06-21 16:00:40,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905517537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:40,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:40,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:00:40,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259195199] [2024-06-21 16:00:40,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:40,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:00:40,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:40,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:00:40,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:00:41,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:41,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 402 transitions, 5078 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:41,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:41,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:41,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:42,208 INFO L124 PetriNetUnfolderBase]: 4397/7620 cut-off events. [2024-06-21 16:00:42,208 INFO L125 PetriNetUnfolderBase]: For 1148058/1148058 co-relation queries the response was YES. [2024-06-21 16:00:42,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55736 conditions, 7620 events. 4397/7620 cut-off events. For 1148058/1148058 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 55221 event pairs, 1287 based on Foata normal form. 16/7632 useless extension candidates. Maximal degree in co-relation 55586. Up to 6648 conditions per place. [2024-06-21 16:00:42,308 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 332 selfloop transitions, 85 changer transitions 0/426 dead transitions. [2024-06-21 16:00:42,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 426 transitions, 6039 flow [2024-06-21 16:00:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:00:42,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:00:42,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 16:00:42,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 16:00:42,309 INFO L175 Difference]: Start difference. First operand has 309 places, 402 transitions, 5078 flow. Second operand 8 states and 204 transitions. [2024-06-21 16:00:42,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 426 transitions, 6039 flow [2024-06-21 16:00:46,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 426 transitions, 5738 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 16:00:46,185 INFO L231 Difference]: Finished difference. Result has 310 places, 404 transitions, 5018 flow [2024-06-21 16:00:46,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4781, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5018, PETRI_PLACES=310, PETRI_TRANSITIONS=404} [2024-06-21 16:00:46,186 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 16:00:46,186 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 404 transitions, 5018 flow [2024-06-21 16:00:46,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:46,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:46,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:46,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:00:46,186 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:46,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash -529030820, now seen corresponding path program 4 times [2024-06-21 16:00:46,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:46,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134911483] [2024-06-21 16:00:46,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:46,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:46,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:46,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:46,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134911483] [2024-06-21 16:00:46,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134911483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:46,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:46,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:46,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144068640] [2024-06-21 16:00:46,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:46,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:46,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:46,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:46,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:46,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:46,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 404 transitions, 5018 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:46,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:46,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:46,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:47,449 INFO L124 PetriNetUnfolderBase]: 4453/7696 cut-off events. [2024-06-21 16:00:47,450 INFO L125 PetriNetUnfolderBase]: For 1167720/1167720 co-relation queries the response was YES. [2024-06-21 16:00:47,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55836 conditions, 7696 events. 4453/7696 cut-off events. For 1167720/1167720 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 55887 event pairs, 1332 based on Foata normal form. 16/7694 useless extension candidates. Maximal degree in co-relation 55686. Up to 6736 conditions per place. [2024-06-21 16:00:47,548 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 321 selfloop transitions, 91 changer transitions 0/421 dead transitions. [2024-06-21 16:00:47,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 421 transitions, 5950 flow [2024-06-21 16:00:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:47,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:47,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:00:47,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 16:00:47,549 INFO L175 Difference]: Start difference. First operand has 310 places, 404 transitions, 5018 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:00:47,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 421 transitions, 5950 flow [2024-06-21 16:00:51,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 421 transitions, 5740 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:00:51,878 INFO L231 Difference]: Finished difference. Result has 311 places, 406 transitions, 5060 flow [2024-06-21 16:00:51,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=404, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5060, PETRI_PLACES=311, PETRI_TRANSITIONS=406} [2024-06-21 16:00:51,878 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-21 16:00:51,879 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 406 transitions, 5060 flow [2024-06-21 16:00:51,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:51,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:51,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:51,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:00:51,879 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:51,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash -675823550, now seen corresponding path program 5 times [2024-06-21 16:00:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:51,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772975219] [2024-06-21 16:00:51,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:51,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772975219] [2024-06-21 16:00:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772975219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:51,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:51,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581772284] [2024-06-21 16:00:51,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:51,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:51,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:51,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:51,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:51,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:51,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 406 transitions, 5060 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:51,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:51,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:51,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:53,319 INFO L124 PetriNetUnfolderBase]: 4509/7792 cut-off events. [2024-06-21 16:00:53,319 INFO L125 PetriNetUnfolderBase]: For 1186094/1186094 co-relation queries the response was YES. [2024-06-21 16:00:53,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56461 conditions, 7792 events. 4509/7792 cut-off events. For 1186094/1186094 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 56696 event pairs, 1346 based on Foata normal form. 16/7790 useless extension candidates. Maximal degree in co-relation 56310. Up to 6824 conditions per place. [2024-06-21 16:00:53,405 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 331 selfloop transitions, 83 changer transitions 0/423 dead transitions. [2024-06-21 16:00:53,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 423 transitions, 6000 flow [2024-06-21 16:00:53,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:53,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:53,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:00:53,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 16:00:53,406 INFO L175 Difference]: Start difference. First operand has 311 places, 406 transitions, 5060 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:00:53,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 423 transitions, 6000 flow [2024-06-21 16:00:57,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 423 transitions, 5770 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:00:57,492 INFO L231 Difference]: Finished difference. Result has 313 places, 408 transitions, 5070 flow [2024-06-21 16:00:57,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4830, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5070, PETRI_PLACES=313, PETRI_TRANSITIONS=408} [2024-06-21 16:00:57,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 16:00:57,492 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 408 transitions, 5070 flow [2024-06-21 16:00:57,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:57,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:00:57,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:00:57,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:00:57,493 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:00:57,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:00:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash -675971420, now seen corresponding path program 6 times [2024-06-21 16:00:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:00:57,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460764972] [2024-06-21 16:00:57,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:00:57,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:00:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:00:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:00:57,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:00:57,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460764972] [2024-06-21 16:00:57,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460764972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:00:57,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:00:57,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:00:57,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127912987] [2024-06-21 16:00:57,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:00:57,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:00:57,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:00:57,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:00:57,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:00:57,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:00:57,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 408 transitions, 5070 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:00:57,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:00:57,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:00:57,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:00:58,779 INFO L124 PetriNetUnfolderBase]: 4576/7891 cut-off events. [2024-06-21 16:00:58,779 INFO L125 PetriNetUnfolderBase]: For 1209121/1209121 co-relation queries the response was YES. [2024-06-21 16:00:58,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57629 conditions, 7891 events. 4576/7891 cut-off events. For 1209121/1209121 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 57446 event pairs, 1340 based on Foata normal form. 12/7885 useless extension candidates. Maximal degree in co-relation 57477. Up to 6691 conditions per place. [2024-06-21 16:00:58,880 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 83 changer transitions 0/431 dead transitions. [2024-06-21 16:00:58,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 431 transitions, 6364 flow [2024-06-21 16:00:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:00:58,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:00:58,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 16:00:58,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 16:00:58,881 INFO L175 Difference]: Start difference. First operand has 313 places, 408 transitions, 5070 flow. Second operand 7 states and 179 transitions. [2024-06-21 16:00:58,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 431 transitions, 6364 flow [2024-06-21 16:01:02,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 431 transitions, 6148 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:02,631 INFO L231 Difference]: Finished difference. Result has 316 places, 412 transitions, 5210 flow [2024-06-21 16:01:02,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4854, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5210, PETRI_PLACES=316, PETRI_TRANSITIONS=412} [2024-06-21 16:01:02,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-21 16:01:02,632 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 412 transitions, 5210 flow [2024-06-21 16:01:02,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:02,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:02,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:02,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:01:02,632 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:02,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:02,632 INFO L85 PathProgramCache]: Analyzing trace with hash -468897248, now seen corresponding path program 1 times [2024-06-21 16:01:02,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:02,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910978309] [2024-06-21 16:01:02,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:02,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:02,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:02,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:02,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910978309] [2024-06-21 16:01:02,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910978309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:02,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:02,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:02,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745525637] [2024-06-21 16:01:02,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:02,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:02,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:02,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:02,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:02,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:02,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 412 transitions, 5210 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:02,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:02,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:02,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:03,999 INFO L124 PetriNetUnfolderBase]: 4616/7977 cut-off events. [2024-06-21 16:01:03,999 INFO L125 PetriNetUnfolderBase]: For 1235234/1235234 co-relation queries the response was YES. [2024-06-21 16:01:04,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58196 conditions, 7977 events. 4616/7977 cut-off events. For 1235234/1235234 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 58249 event pairs, 1323 based on Foata normal form. 12/7971 useless extension candidates. Maximal degree in co-relation 58042. Up to 6797 conditions per place. [2024-06-21 16:01:04,108 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 323 selfloop transitions, 100 changer transitions 0/432 dead transitions. [2024-06-21 16:01:04,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 432 transitions, 6188 flow [2024-06-21 16:01:04,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:01:04,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 16:01:04,109 INFO L175 Difference]: Start difference. First operand has 316 places, 412 transitions, 5210 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:01:04,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 432 transitions, 6188 flow [2024-06-21 16:01:07,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 432 transitions, 6013 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 16:01:07,972 INFO L231 Difference]: Finished difference. Result has 320 places, 414 transitions, 5316 flow [2024-06-21 16:01:07,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5035, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5316, PETRI_PLACES=320, PETRI_TRANSITIONS=414} [2024-06-21 16:01:07,973 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 16:01:07,973 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 414 transitions, 5316 flow [2024-06-21 16:01:07,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:07,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:07,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:07,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:01:07,973 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:07,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:07,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1288097676, now seen corresponding path program 7 times [2024-06-21 16:01:07,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:07,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773830941] [2024-06-21 16:01:07,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:07,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:08,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:08,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773830941] [2024-06-21 16:01:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773830941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:08,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:08,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:08,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113441111] [2024-06-21 16:01:08,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:08,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:08,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:08,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:08,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:08,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:08,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 414 transitions, 5316 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:08,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:08,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:08,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:09,359 INFO L124 PetriNetUnfolderBase]: 4656/8038 cut-off events. [2024-06-21 16:01:09,360 INFO L125 PetriNetUnfolderBase]: For 1251916/1251916 co-relation queries the response was YES. [2024-06-21 16:01:09,436 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58597 conditions, 8038 events. 4656/8038 cut-off events. For 1251916/1251916 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 58675 event pairs, 1142 based on Foata normal form. 12/8046 useless extension candidates. Maximal degree in co-relation 58441. Up to 6704 conditions per place. [2024-06-21 16:01:09,461 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 92 changer transitions 2/444 dead transitions. [2024-06-21 16:01:09,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 444 transitions, 6529 flow [2024-06-21 16:01:09,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:09,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:09,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 189 transitions. [2024-06-21 16:01:09,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 16:01:09,462 INFO L175 Difference]: Start difference. First operand has 320 places, 414 transitions, 5316 flow. Second operand 7 states and 189 transitions. [2024-06-21 16:01:09,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 444 transitions, 6529 flow [2024-06-21 16:01:12,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 444 transitions, 6268 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:12,791 INFO L231 Difference]: Finished difference. Result has 322 places, 414 transitions, 5258 flow [2024-06-21 16:01:12,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5055, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5258, PETRI_PLACES=322, PETRI_TRANSITIONS=414} [2024-06-21 16:01:12,791 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-21 16:01:12,791 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 414 transitions, 5258 flow [2024-06-21 16:01:12,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:12,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:12,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:12,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:01:12,792 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:12,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:12,792 INFO L85 PathProgramCache]: Analyzing trace with hash -681390176, now seen corresponding path program 8 times [2024-06-21 16:01:12,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:12,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077100207] [2024-06-21 16:01:12,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:12,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:12,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:12,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077100207] [2024-06-21 16:01:12,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077100207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:12,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:12,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:12,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130784661] [2024-06-21 16:01:12,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:12,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:12,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:12,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:12,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:12,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:12,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 414 transitions, 5258 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:12,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:12,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:12,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:14,323 INFO L124 PetriNetUnfolderBase]: 4688/8075 cut-off events. [2024-06-21 16:01:14,323 INFO L125 PetriNetUnfolderBase]: For 1297622/1297622 co-relation queries the response was YES. [2024-06-21 16:01:14,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58739 conditions, 8075 events. 4688/8075 cut-off events. For 1297622/1297622 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 58857 event pairs, 1346 based on Foata normal form. 16/8087 useless extension candidates. Maximal degree in co-relation 58582. Up to 7113 conditions per place. [2024-06-21 16:01:14,414 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 81 changer transitions 2/437 dead transitions. [2024-06-21 16:01:14,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 437 transitions, 6209 flow [2024-06-21 16:01:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:14,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:14,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:01:14,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 16:01:14,415 INFO L175 Difference]: Start difference. First operand has 322 places, 414 transitions, 5258 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:01:14,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 437 transitions, 6209 flow [2024-06-21 16:01:18,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 437 transitions, 6047 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 16:01:18,294 INFO L231 Difference]: Finished difference. Result has 325 places, 414 transitions, 5276 flow [2024-06-21 16:01:18,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5097, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5276, PETRI_PLACES=325, PETRI_TRANSITIONS=414} [2024-06-21 16:01:18,295 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 16:01:18,295 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 414 transitions, 5276 flow [2024-06-21 16:01:18,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:18,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:18,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:18,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:01:18,295 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:18,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:18,296 INFO L85 PathProgramCache]: Analyzing trace with hash -482088386, now seen corresponding path program 9 times [2024-06-21 16:01:18,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:18,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468530023] [2024-06-21 16:01:18,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:18,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:18,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:18,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:18,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468530023] [2024-06-21 16:01:18,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468530023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:18,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:18,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:18,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835178498] [2024-06-21 16:01:18,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:18,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:18,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:18,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:18,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:18,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:18,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 414 transitions, 5276 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:18,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:18,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:18,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:19,691 INFO L124 PetriNetUnfolderBase]: 4711/8110 cut-off events. [2024-06-21 16:01:19,691 INFO L125 PetriNetUnfolderBase]: For 1320058/1320058 co-relation queries the response was YES. [2024-06-21 16:01:19,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59035 conditions, 8110 events. 4711/8110 cut-off events. For 1320058/1320058 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 59120 event pairs, 1350 based on Foata normal form. 16/8122 useless extension candidates. Maximal degree in co-relation 58877. Up to 7153 conditions per place. [2024-06-21 16:01:19,803 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 81 changer transitions 1/434 dead transitions. [2024-06-21 16:01:19,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 434 transitions, 6216 flow [2024-06-21 16:01:19,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:19,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 16:01:19,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-21 16:01:19,804 INFO L175 Difference]: Start difference. First operand has 325 places, 414 transitions, 5276 flow. Second operand 7 states and 178 transitions. [2024-06-21 16:01:19,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 434 transitions, 6216 flow [2024-06-21 16:01:23,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 434 transitions, 6051 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:23,792 INFO L231 Difference]: Finished difference. Result has 327 places, 415 transitions, 5300 flow [2024-06-21 16:01:23,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5111, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5300, PETRI_PLACES=327, PETRI_TRANSITIONS=415} [2024-06-21 16:01:23,792 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-21 16:01:23,792 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 415 transitions, 5300 flow [2024-06-21 16:01:23,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:23,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:23,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:23,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:01:23,793 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:23,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:23,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1201765852, now seen corresponding path program 10 times [2024-06-21 16:01:23,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:23,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152560476] [2024-06-21 16:01:23,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:23,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:23,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152560476] [2024-06-21 16:01:23,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152560476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:23,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:23,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:23,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431516779] [2024-06-21 16:01:23,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:23,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:23,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:23,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 415 transitions, 5300 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:23,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:23,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:23,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:25,182 INFO L124 PetriNetUnfolderBase]: 4627/7949 cut-off events. [2024-06-21 16:01:25,182 INFO L125 PetriNetUnfolderBase]: For 1231526/1231526 co-relation queries the response was YES. [2024-06-21 16:01:25,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56647 conditions, 7949 events. 4627/7949 cut-off events. For 1231526/1231526 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 57780 event pairs, 1331 based on Foata normal form. 16/7952 useless extension candidates. Maximal degree in co-relation 56488. Up to 7021 conditions per place. [2024-06-21 16:01:25,292 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 334 selfloop transitions, 86 changer transitions 1/430 dead transitions. [2024-06-21 16:01:25,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 430 transitions, 6190 flow [2024-06-21 16:01:25,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:25,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:25,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 16:01:25,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-21 16:01:25,293 INFO L175 Difference]: Start difference. First operand has 327 places, 415 transitions, 5300 flow. Second operand 7 states and 173 transitions. [2024-06-21 16:01:25,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 430 transitions, 6190 flow [2024-06-21 16:01:29,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 430 transitions, 6021 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:29,508 INFO L231 Difference]: Finished difference. Result has 329 places, 414 transitions, 5292 flow [2024-06-21 16:01:29,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5292, PETRI_PLACES=329, PETRI_TRANSITIONS=414} [2024-06-21 16:01:29,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 16:01:29,509 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 414 transitions, 5292 flow [2024-06-21 16:01:29,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:29,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:29,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:29,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:01:29,509 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:29,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:29,509 INFO L85 PathProgramCache]: Analyzing trace with hash -474463874, now seen corresponding path program 2 times [2024-06-21 16:01:29,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:29,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734028876] [2024-06-21 16:01:29,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:29,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:29,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:29,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:29,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734028876] [2024-06-21 16:01:29,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734028876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:29,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:29,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:29,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764531525] [2024-06-21 16:01:29,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:29,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:29,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:29,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:29,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:29,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:29,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 414 transitions, 5292 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:29,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:29,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:29,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:30,876 INFO L124 PetriNetUnfolderBase]: 4555/7850 cut-off events. [2024-06-21 16:01:30,876 INFO L125 PetriNetUnfolderBase]: For 1225924/1225924 co-relation queries the response was YES. [2024-06-21 16:01:30,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56652 conditions, 7850 events. 4555/7850 cut-off events. For 1225924/1225924 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 56934 event pairs, 1250 based on Foata normal form. 12/7858 useless extension candidates. Maximal degree in co-relation 56492. Up to 6817 conditions per place. [2024-06-21 16:01:30,981 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 86 changer transitions 0/437 dead transitions. [2024-06-21 16:01:30,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 437 transitions, 6292 flow [2024-06-21 16:01:30,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:30,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:30,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:01:30,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 16:01:30,981 INFO L175 Difference]: Start difference. First operand has 329 places, 414 transitions, 5292 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:01:30,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 437 transitions, 6292 flow [2024-06-21 16:01:34,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 437 transitions, 6044 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:34,883 INFO L231 Difference]: Finished difference. Result has 329 places, 416 transitions, 5301 flow [2024-06-21 16:01:34,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5301, PETRI_PLACES=329, PETRI_TRANSITIONS=416} [2024-06-21 16:01:34,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-21 16:01:34,884 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 416 transitions, 5301 flow [2024-06-21 16:01:34,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:34,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:34,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:34,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:01:34,884 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:34,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1209390364, now seen corresponding path program 3 times [2024-06-21 16:01:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000839803] [2024-06-21 16:01:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:34,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:34,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:34,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000839803] [2024-06-21 16:01:34,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000839803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:34,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:34,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:34,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145176325] [2024-06-21 16:01:34,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:34,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:34,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:34,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:34,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:34,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 416 transitions, 5301 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:34,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:34,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:34,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:36,428 INFO L124 PetriNetUnfolderBase]: 4595/7905 cut-off events. [2024-06-21 16:01:36,428 INFO L125 PetriNetUnfolderBase]: For 1249873/1249873 co-relation queries the response was YES. [2024-06-21 16:01:36,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57247 conditions, 7905 events. 4595/7905 cut-off events. For 1249873/1249873 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 57472 event pairs, 1291 based on Foata normal form. 12/7904 useless extension candidates. Maximal degree in co-relation 57086. Up to 6913 conditions per place. [2024-06-21 16:01:36,521 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 337 selfloop transitions, 90 changer transitions 0/436 dead transitions. [2024-06-21 16:01:36,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 436 transitions, 6295 flow [2024-06-21 16:01:36,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:36,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:36,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:01:36,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 16:01:36,522 INFO L175 Difference]: Start difference. First operand has 329 places, 416 transitions, 5301 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:01:36,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 436 transitions, 6295 flow [2024-06-21 16:01:40,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 436 transitions, 6058 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:40,995 INFO L231 Difference]: Finished difference. Result has 331 places, 418 transitions, 5333 flow [2024-06-21 16:01:40,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5333, PETRI_PLACES=331, PETRI_TRANSITIONS=418} [2024-06-21 16:01:40,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-21 16:01:40,996 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 418 transitions, 5333 flow [2024-06-21 16:01:40,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:40,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:40,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:40,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:01:40,996 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:40,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:40,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1771250972, now seen corresponding path program 4 times [2024-06-21 16:01:40,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:40,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552709264] [2024-06-21 16:01:40,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:40,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:41,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:41,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:41,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552709264] [2024-06-21 16:01:41,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552709264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:41,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:41,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:41,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018423926] [2024-06-21 16:01:41,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:41,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:41,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:41,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:41,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:41,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 418 transitions, 5333 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:41,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:41,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:41,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:42,352 INFO L124 PetriNetUnfolderBase]: 4602/7940 cut-off events. [2024-06-21 16:01:42,352 INFO L125 PetriNetUnfolderBase]: For 1225031/1225031 co-relation queries the response was YES. [2024-06-21 16:01:42,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56495 conditions, 7940 events. 4602/7940 cut-off events. For 1225031/1225031 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57890 event pairs, 1256 based on Foata normal form. 12/7939 useless extension candidates. Maximal degree in co-relation 56333. Up to 6442 conditions per place. [2024-06-21 16:01:42,468 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 110 changer transitions 0/438 dead transitions. [2024-06-21 16:01:42,468 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 438 transitions, 6293 flow [2024-06-21 16:01:42,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:01:42,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:01:42,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:01:42,469 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 16:01:42,469 INFO L175 Difference]: Start difference. First operand has 331 places, 418 transitions, 5333 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:01:42,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 438 transitions, 6293 flow [2024-06-21 16:01:47,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 438 transitions, 6044 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 16:01:47,789 INFO L231 Difference]: Finished difference. Result has 333 places, 419 transitions, 5351 flow [2024-06-21 16:01:47,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5084, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5351, PETRI_PLACES=333, PETRI_TRANSITIONS=419} [2024-06-21 16:01:47,790 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 290 predicate places. [2024-06-21 16:01:47,790 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 419 transitions, 5351 flow [2024-06-21 16:01:47,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:47,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:47,790 INFO 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] [2024-06-21 16:01:47,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:01:47,790 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:47,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash -276218431, now seen corresponding path program 1 times [2024-06-21 16:01:47,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:47,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300700309] [2024-06-21 16:01:47,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:47,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:47,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:47,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300700309] [2024-06-21 16:01:47,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300700309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:47,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:47,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:47,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900973982] [2024-06-21 16:01:47,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:47,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:47,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:47,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:47,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:47,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:47,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 419 transitions, 5351 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:47,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:47,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:47,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:49,207 INFO L124 PetriNetUnfolderBase]: 4607/7961 cut-off events. [2024-06-21 16:01:49,208 INFO L125 PetriNetUnfolderBase]: For 1159755/1159755 co-relation queries the response was YES. [2024-06-21 16:01:49,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56575 conditions, 7961 events. 4607/7961 cut-off events. For 1159755/1159755 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 57987 event pairs, 1245 based on Foata normal form. 1/7960 useless extension candidates. Maximal degree in co-relation 56412. Up to 7246 conditions per place. [2024-06-21 16:01:49,317 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 418 selfloop transitions, 27 changer transitions 0/454 dead transitions. [2024-06-21 16:01:49,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 454 transitions, 6605 flow [2024-06-21 16:01:49,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:01:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:01:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 16:01:49,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-21 16:01:49,318 INFO L175 Difference]: Start difference. First operand has 333 places, 419 transitions, 5351 flow. Second operand 9 states and 224 transitions. [2024-06-21 16:01:49,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 454 transitions, 6605 flow [2024-06-21 16:01:53,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 454 transitions, 6235 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 16:01:53,705 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5083 flow [2024-06-21 16:01:53,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4981, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5083, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-21 16:01:53,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 16:01:53,705 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5083 flow [2024-06-21 16:01:53,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:53,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:53,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:01:53,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:01:53,705 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:53,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:53,706 INFO L85 PathProgramCache]: Analyzing trace with hash 45288803, now seen corresponding path program 2 times [2024-06-21 16:01:53,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:53,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416959516] [2024-06-21 16:01:53,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:53,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:53,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:53,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416959516] [2024-06-21 16:01:53,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416959516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:53,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:53,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:01:53,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130222633] [2024-06-21 16:01:53,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:53,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:01:53,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:53,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:01:53,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:01:53,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:53,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5083 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:53,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:53,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:53,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:01:55,058 INFO L124 PetriNetUnfolderBase]: 4604/7945 cut-off events. [2024-06-21 16:01:55,058 INFO L125 PetriNetUnfolderBase]: For 1164154/1164154 co-relation queries the response was YES. [2024-06-21 16:01:55,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55345 conditions, 7945 events. 4604/7945 cut-off events. For 1164154/1164154 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 57766 event pairs, 1235 based on Foata normal form. 1/7944 useless extension candidates. Maximal degree in co-relation 55183. Up to 7243 conditions per place. [2024-06-21 16:01:55,164 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 413 selfloop transitions, 27 changer transitions 0/449 dead transitions. [2024-06-21 16:01:55,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 449 transitions, 6031 flow [2024-06-21 16:01:55,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:01:55,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:01:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:01:55,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 16:01:55,165 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5083 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:01:55,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 449 transitions, 6031 flow [2024-06-21 16:01:59,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 449 transitions, 5949 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 16:01:59,718 INFO L231 Difference]: Finished difference. Result has 335 places, 422 transitions, 5061 flow [2024-06-21 16:01:59,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5001, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5061, PETRI_PLACES=335, PETRI_TRANSITIONS=422} [2024-06-21 16:01:59,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 16:01:59,718 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 422 transitions, 5061 flow [2024-06-21 16:01:59,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:59,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:01:59,718 INFO 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] [2024-06-21 16:01:59,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:01:59,719 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:01:59,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:01:59,719 INFO L85 PathProgramCache]: Analyzing trace with hash -838574683, now seen corresponding path program 1 times [2024-06-21 16:01:59,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:01:59,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134541648] [2024-06-21 16:01:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:01:59,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:01:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:01:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:01:59,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:01:59,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134541648] [2024-06-21 16:01:59,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134541648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:01:59,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:01:59,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:01:59,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853162804] [2024-06-21 16:01:59,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:01:59,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:01:59,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:01:59,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:01:59,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:01:59,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:01:59,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 422 transitions, 5061 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:01:59,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:01:59,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:01:59,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:01,219 INFO L124 PetriNetUnfolderBase]: 4625/7950 cut-off events. [2024-06-21 16:02:01,220 INFO L125 PetriNetUnfolderBase]: For 1213861/1213861 co-relation queries the response was YES. [2024-06-21 16:02:01,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56122 conditions, 7950 events. 4625/7950 cut-off events. For 1213861/1213861 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 57738 event pairs, 1234 based on Foata normal form. 2/7923 useless extension candidates. Maximal degree in co-relation 55960. Up to 7009 conditions per place. [2024-06-21 16:02:01,315 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 113 changer transitions 2/459 dead transitions. [2024-06-21 16:02:01,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 459 transitions, 6495 flow [2024-06-21 16:02:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:02:01,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:02:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 233 transitions. [2024-06-21 16:02:01,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6164021164021164 [2024-06-21 16:02:01,316 INFO L175 Difference]: Start difference. First operand has 335 places, 422 transitions, 5061 flow. Second operand 9 states and 233 transitions. [2024-06-21 16:02:01,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 459 transitions, 6495 flow [2024-06-21 16:02:05,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 459 transitions, 6431 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:05,306 INFO L231 Difference]: Finished difference. Result has 338 places, 426 transitions, 5441 flow [2024-06-21 16:02:05,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4997, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5441, PETRI_PLACES=338, PETRI_TRANSITIONS=426} [2024-06-21 16:02:05,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-21 16:02:05,306 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 426 transitions, 5441 flow [2024-06-21 16:02:05,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:05,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:05,306 INFO 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] [2024-06-21 16:02:05,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:02:05,307 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:05,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:05,307 INFO L85 PathProgramCache]: Analyzing trace with hash 919759199, now seen corresponding path program 2 times [2024-06-21 16:02:05,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:05,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280431377] [2024-06-21 16:02:05,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:05,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:05,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:05,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:05,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280431377] [2024-06-21 16:02:05,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280431377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:05,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:05,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:05,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677345994] [2024-06-21 16:02:05,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:05,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:05,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:05,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:05,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:05,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:05,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 426 transitions, 5441 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:05,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:05,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:05,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:06,711 INFO L124 PetriNetUnfolderBase]: 4620/7953 cut-off events. [2024-06-21 16:02:06,711 INFO L125 PetriNetUnfolderBase]: For 1216298/1216298 co-relation queries the response was YES. [2024-06-21 16:02:06,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56375 conditions, 7953 events. 4620/7953 cut-off events. For 1216298/1216298 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 57842 event pairs, 1259 based on Foata normal form. 2/7938 useless extension candidates. Maximal degree in co-relation 56211. Up to 7059 conditions per place. [2024-06-21 16:02:06,822 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 334 selfloop transitions, 108 changer transitions 0/451 dead transitions. [2024-06-21 16:02:06,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 451 transitions, 6387 flow [2024-06-21 16:02:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:06,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 16:02:06,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6130952380952381 [2024-06-21 16:02:06,823 INFO L175 Difference]: Start difference. First operand has 338 places, 426 transitions, 5441 flow. Second operand 8 states and 206 transitions. [2024-06-21 16:02:06,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 451 transitions, 6387 flow [2024-06-21 16:02:11,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 6078 flow, removed 86 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:11,936 INFO L231 Difference]: Finished difference. Result has 341 places, 426 transitions, 5353 flow [2024-06-21 16:02:11,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5132, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5353, PETRI_PLACES=341, PETRI_TRANSITIONS=426} [2024-06-21 16:02:11,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 16:02:11,936 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 426 transitions, 5353 flow [2024-06-21 16:02:11,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:11,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:11,936 INFO 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] [2024-06-21 16:02:11,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:02:11,937 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:11,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:11,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1025612251, now seen corresponding path program 3 times [2024-06-21 16:02:11,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:11,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559825052] [2024-06-21 16:02:11,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:11,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:11,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:12,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559825052] [2024-06-21 16:02:12,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559825052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:12,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:12,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:12,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393483839] [2024-06-21 16:02:12,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:12,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:12,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:12,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:12,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 426 transitions, 5353 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:12,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:12,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:12,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:13,294 INFO L124 PetriNetUnfolderBase]: 4628/7971 cut-off events. [2024-06-21 16:02:13,294 INFO L125 PetriNetUnfolderBase]: For 1238710/1238710 co-relation queries the response was YES. [2024-06-21 16:02:13,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56686 conditions, 7971 events. 4628/7971 cut-off events. For 1238710/1238710 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 57993 event pairs, 1263 based on Foata normal form. 2/7958 useless extension candidates. Maximal degree in co-relation 56520. Up to 7071 conditions per place. [2024-06-21 16:02:13,402 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 330 selfloop transitions, 108 changer transitions 0/447 dead transitions. [2024-06-21 16:02:13,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 447 transitions, 6377 flow [2024-06-21 16:02:13,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 16:02:13,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5922619047619048 [2024-06-21 16:02:13,403 INFO L175 Difference]: Start difference. First operand has 341 places, 426 transitions, 5353 flow. Second operand 8 states and 199 transitions. [2024-06-21 16:02:13,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 447 transitions, 6377 flow [2024-06-21 16:02:18,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 447 transitions, 6139 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:18,309 INFO L231 Difference]: Finished difference. Result has 342 places, 428 transitions, 5442 flow [2024-06-21 16:02:18,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5115, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5442, PETRI_PLACES=342, PETRI_TRANSITIONS=428} [2024-06-21 16:02:18,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-21 16:02:18,310 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 428 transitions, 5442 flow [2024-06-21 16:02:18,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:18,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:18,310 INFO 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] [2024-06-21 16:02:18,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:02:18,310 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:18,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:18,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1560166123, now seen corresponding path program 4 times [2024-06-21 16:02:18,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:18,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000793416] [2024-06-21 16:02:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:18,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:18,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:18,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:18,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000793416] [2024-06-21 16:02:18,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000793416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:18,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:18,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:18,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958399963] [2024-06-21 16:02:18,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:18,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:18,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:18,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:18,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:18,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:18,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 428 transitions, 5442 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:18,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:18,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:18,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:19,729 INFO L124 PetriNetUnfolderBase]: 4636/7979 cut-off events. [2024-06-21 16:02:19,729 INFO L125 PetriNetUnfolderBase]: For 1261430/1261430 co-relation queries the response was YES. [2024-06-21 16:02:19,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57075 conditions, 7979 events. 4636/7979 cut-off events. For 1261430/1261430 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 58020 event pairs, 1259 based on Foata normal form. 2/7962 useless extension candidates. Maximal degree in co-relation 56908. Up to 7063 conditions per place. [2024-06-21 16:02:19,841 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 329 selfloop transitions, 113 changer transitions 0/451 dead transitions. [2024-06-21 16:02:19,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 451 transitions, 6482 flow [2024-06-21 16:02:19,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:02:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:02:19,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 220 transitions. [2024-06-21 16:02:19,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.582010582010582 [2024-06-21 16:02:19,842 INFO L175 Difference]: Start difference. First operand has 342 places, 428 transitions, 5442 flow. Second operand 9 states and 220 transitions. [2024-06-21 16:02:19,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 451 transitions, 6482 flow [2024-06-21 16:02:24,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 451 transitions, 6171 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:24,846 INFO L231 Difference]: Finished difference. Result has 345 places, 430 transitions, 5472 flow [2024-06-21 16:02:24,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5131, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5472, PETRI_PLACES=345, PETRI_TRANSITIONS=430} [2024-06-21 16:02:24,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 16:02:24,846 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 430 transitions, 5472 flow [2024-06-21 16:02:24,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:24,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:24,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:24,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:02:24,847 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:24,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:24,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1368301545, now seen corresponding path program 3 times [2024-06-21 16:02:24,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:24,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985308110] [2024-06-21 16:02:24,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:24,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:24,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:24,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985308110] [2024-06-21 16:02:24,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985308110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:24,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:24,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:24,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923766541] [2024-06-21 16:02:24,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:24,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:24,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:24,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:24,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:24,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:24,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 430 transitions, 5472 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:24,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:24,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:24,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:26,328 INFO L124 PetriNetUnfolderBase]: 4641/7984 cut-off events. [2024-06-21 16:02:26,328 INFO L125 PetriNetUnfolderBase]: For 1272253/1272253 co-relation queries the response was YES. [2024-06-21 16:02:26,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57186 conditions, 7984 events. 4641/7984 cut-off events. For 1272253/1272253 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 58009 event pairs, 1250 based on Foata normal form. 1/7963 useless extension candidates. Maximal degree in co-relation 57018. Up to 6748 conditions per place. [2024-06-21 16:02:26,431 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 288 selfloop transitions, 166 changer transitions 0/463 dead transitions. [2024-06-21 16:02:26,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 463 transitions, 7262 flow [2024-06-21 16:02:26,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:26,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:26,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 16:02:26,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 16:02:26,432 INFO L175 Difference]: Start difference. First operand has 345 places, 430 transitions, 5472 flow. Second operand 8 states and 217 transitions. [2024-06-21 16:02:26,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 463 transitions, 7262 flow [2024-06-21 16:02:31,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 463 transitions, 6937 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-21 16:02:31,601 INFO L231 Difference]: Finished difference. Result has 346 places, 433 transitions, 5531 flow [2024-06-21 16:02:31,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5531, PETRI_PLACES=346, PETRI_TRANSITIONS=433} [2024-06-21 16:02:31,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-21 16:02:31,602 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 433 transitions, 5531 flow [2024-06-21 16:02:31,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:31,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:31,602 INFO 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] [2024-06-21 16:02:31,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:02:31,602 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:31,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:31,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1098122123, now seen corresponding path program 4 times [2024-06-21 16:02:31,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:31,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456462993] [2024-06-21 16:02:31,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:31,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:31,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:31,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456462993] [2024-06-21 16:02:31,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456462993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:31,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:31,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:31,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082118239] [2024-06-21 16:02:31,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:31,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:31,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:31,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:31,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:31,693 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:31,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 433 transitions, 5531 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:31,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:31,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:31,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:33,002 INFO L124 PetriNetUnfolderBase]: 4654/8004 cut-off events. [2024-06-21 16:02:33,002 INFO L125 PetriNetUnfolderBase]: For 1298140/1298140 co-relation queries the response was YES. [2024-06-21 16:02:33,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57658 conditions, 8004 events. 4654/8004 cut-off events. For 1298140/1298140 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58262 event pairs, 1250 based on Foata normal form. 1/7983 useless extension candidates. Maximal degree in co-relation 57489. Up to 6758 conditions per place. [2024-06-21 16:02:33,292 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 286 selfloop transitions, 172 changer transitions 0/467 dead transitions. [2024-06-21 16:02:33,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 467 transitions, 7643 flow [2024-06-21 16:02:33,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:33,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:33,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-21 16:02:33,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6398809523809523 [2024-06-21 16:02:33,292 INFO L175 Difference]: Start difference. First operand has 346 places, 433 transitions, 5531 flow. Second operand 8 states and 215 transitions. [2024-06-21 16:02:33,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 467 transitions, 7643 flow [2024-06-21 16:02:38,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 467 transitions, 7273 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 16:02:38,376 INFO L231 Difference]: Finished difference. Result has 348 places, 439 transitions, 5615 flow [2024-06-21 16:02:38,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5173, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5615, PETRI_PLACES=348, PETRI_TRANSITIONS=439} [2024-06-21 16:02:38,376 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-21 16:02:38,376 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 439 transitions, 5615 flow [2024-06-21 16:02:38,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:38,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:38,376 INFO 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] [2024-06-21 16:02:38,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:02:38,377 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:38,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash -2055619729, now seen corresponding path program 5 times [2024-06-21 16:02:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:38,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126199423] [2024-06-21 16:02:38,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:38,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:38,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:38,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:38,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126199423] [2024-06-21 16:02:38,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126199423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:38,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:38,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:38,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358185139] [2024-06-21 16:02:38,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:38,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:38,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:38,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:38,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:38,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 439 transitions, 5615 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:38,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:38,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:38,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:39,824 INFO L124 PetriNetUnfolderBase]: 4651/8000 cut-off events. [2024-06-21 16:02:39,824 INFO L125 PetriNetUnfolderBase]: For 1309242/1309242 co-relation queries the response was YES. [2024-06-21 16:02:39,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57621 conditions, 8000 events. 4651/8000 cut-off events. For 1309242/1309242 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 58206 event pairs, 1250 based on Foata normal form. 1/7979 useless extension candidates. Maximal degree in co-relation 57451. Up to 6756 conditions per place. [2024-06-21 16:02:39,937 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 175 changer transitions 0/469 dead transitions. [2024-06-21 16:02:39,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 469 transitions, 7383 flow [2024-06-21 16:02:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:39,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:39,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-21 16:02:39,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 16:02:39,938 INFO L175 Difference]: Start difference. First operand has 348 places, 439 transitions, 5615 flow. Second operand 8 states and 217 transitions. [2024-06-21 16:02:39,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 469 transitions, 7383 flow [2024-06-21 16:02:45,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7087 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-21 16:02:45,406 INFO L231 Difference]: Finished difference. Result has 352 places, 439 transitions, 5675 flow [2024-06-21 16:02:45,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=352, PETRI_TRANSITIONS=439} [2024-06-21 16:02:45,406 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 16:02:45,407 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 439 transitions, 5675 flow [2024-06-21 16:02:45,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:45,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:45,407 INFO 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] [2024-06-21 16:02:45,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:02:45,407 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:45,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:45,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2044191889, now seen corresponding path program 6 times [2024-06-21 16:02:45,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:45,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98646866] [2024-06-21 16:02:45,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:45,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:45,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:45,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:45,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98646866] [2024-06-21 16:02:45,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98646866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:45,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:45,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:02:45,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723133062] [2024-06-21 16:02:45,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:45,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:02:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:02:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:02:45,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:45,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 439 transitions, 5675 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:45,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:45,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:45,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:46,830 INFO L124 PetriNetUnfolderBase]: 4656/8021 cut-off events. [2024-06-21 16:02:46,830 INFO L125 PetriNetUnfolderBase]: For 1329106/1329106 co-relation queries the response was YES. [2024-06-21 16:02:46,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57888 conditions, 8021 events. 4656/8021 cut-off events. For 1329106/1329106 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 58490 event pairs, 1260 based on Foata normal form. 1/8000 useless extension candidates. Maximal degree in co-relation 57717. Up to 6760 conditions per place. [2024-06-21 16:02:46,946 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 178 changer transitions 0/469 dead transitions. [2024-06-21 16:02:46,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 469 transitions, 7496 flow [2024-06-21 16:02:46,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:02:46,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:02:46,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-21 16:02:46,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6369047619047619 [2024-06-21 16:02:46,947 INFO L175 Difference]: Start difference. First operand has 352 places, 439 transitions, 5675 flow. Second operand 8 states and 214 transitions. [2024-06-21 16:02:46,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 469 transitions, 7496 flow [2024-06-21 16:02:51,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 469 transitions, 7035 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:02:51,584 INFO L231 Difference]: Finished difference. Result has 352 places, 442 transitions, 5631 flow [2024-06-21 16:02:51,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5223, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5631, PETRI_PLACES=352, PETRI_TRANSITIONS=442} [2024-06-21 16:02:51,584 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-21 16:02:51,584 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 442 transitions, 5631 flow [2024-06-21 16:02:51,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:51,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:51,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:02:51,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:02:51,585 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:51,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1828590947, now seen corresponding path program 7 times [2024-06-21 16:02:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:51,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190872525] [2024-06-21 16:02:51,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:51,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:51,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:51,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:51,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190872525] [2024-06-21 16:02:51,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190872525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:51,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:51,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:51,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096313210] [2024-06-21 16:02:51,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:51,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:51,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:51,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:51,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 442 transitions, 5631 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:51,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:51,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:51,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:02:52,969 INFO L124 PetriNetUnfolderBase]: 4677/8046 cut-off events. [2024-06-21 16:02:52,969 INFO L125 PetriNetUnfolderBase]: For 1365858/1365858 co-relation queries the response was YES. [2024-06-21 16:02:53,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58490 conditions, 8046 events. 4677/8046 cut-off events. For 1365858/1365858 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 58627 event pairs, 1252 based on Foata normal form. 1/8025 useless extension candidates. Maximal degree in co-relation 58318. Up to 6776 conditions per place. [2024-06-21 16:02:53,085 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 192 changer transitions 0/472 dead transitions. [2024-06-21 16:02:53,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 472 transitions, 7811 flow [2024-06-21 16:02:53,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:02:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:02:53,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 16:02:53,086 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-21 16:02:53,086 INFO L175 Difference]: Start difference. First operand has 352 places, 442 transitions, 5631 flow. Second operand 7 states and 187 transitions. [2024-06-21 16:02:53,086 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 472 transitions, 7811 flow [2024-06-21 16:02:58,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 472 transitions, 7503 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 16:02:58,657 INFO L231 Difference]: Finished difference. Result has 354 places, 451 transitions, 5869 flow [2024-06-21 16:02:58,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5869, PETRI_PLACES=354, PETRI_TRANSITIONS=451} [2024-06-21 16:02:58,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-21 16:02:58,658 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 451 transitions, 5869 flow [2024-06-21 16:02:58,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:58,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:02:58,658 INFO 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] [2024-06-21 16:02:58,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:02:58,658 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:02:58,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:02:58,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1769748335, now seen corresponding path program 8 times [2024-06-21 16:02:58,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:02:58,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481825330] [2024-06-21 16:02:58,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:02:58,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:02:58,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:02:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:02:58,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:02:58,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481825330] [2024-06-21 16:02:58,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481825330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:02:58,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:02:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:02:58,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363492900] [2024-06-21 16:02:58,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:02:58,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:02:58,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:02:58,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:02:58,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:02:58,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:02:58,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 451 transitions, 5869 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:02:58,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:02:58,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:02:58,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:00,128 INFO L124 PetriNetUnfolderBase]: 4690/8064 cut-off events. [2024-06-21 16:03:00,129 INFO L125 PetriNetUnfolderBase]: For 1395937/1395937 co-relation queries the response was YES. [2024-06-21 16:03:00,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58949 conditions, 8064 events. 4690/8064 cut-off events. For 1395937/1395937 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 58698 event pairs, 1250 based on Foata normal form. 1/8043 useless extension candidates. Maximal degree in co-relation 58776. Up to 6786 conditions per place. [2024-06-21 16:03:00,235 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 271 selfloop transitions, 198 changer transitions 0/478 dead transitions. [2024-06-21 16:03:00,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 478 transitions, 8023 flow [2024-06-21 16:03:00,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:00,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:00,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:03:00,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 16:03:00,236 INFO L175 Difference]: Start difference. First operand has 354 places, 451 transitions, 5869 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:03:00,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 478 transitions, 8023 flow [2024-06-21 16:03:06,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 478 transitions, 7739 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 16:03:06,086 INFO L231 Difference]: Finished difference. Result has 359 places, 457 transitions, 6097 flow [2024-06-21 16:03:06,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6097, PETRI_PLACES=359, PETRI_TRANSITIONS=457} [2024-06-21 16:03:06,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 16:03:06,086 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 457 transitions, 6097 flow [2024-06-21 16:03:06,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:06,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:06,087 INFO 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] [2024-06-21 16:03:06,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:03:06,087 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:06,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:06,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1160154901, now seen corresponding path program 9 times [2024-06-21 16:03:06,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:06,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104279619] [2024-06-21 16:03:06,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:06,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:06,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:06,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104279619] [2024-06-21 16:03:06,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104279619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:06,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:06,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310922754] [2024-06-21 16:03:06,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:06,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:06,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:06,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:06,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:06,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:06,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 457 transitions, 6097 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:06,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:06,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:06,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:07,717 INFO L124 PetriNetUnfolderBase]: 4695/8073 cut-off events. [2024-06-21 16:03:07,717 INFO L125 PetriNetUnfolderBase]: For 1417265/1417265 co-relation queries the response was YES. [2024-06-21 16:03:07,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59187 conditions, 8073 events. 4695/8073 cut-off events. For 1417265/1417265 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 58760 event pairs, 1279 based on Foata normal form. 1/8052 useless extension candidates. Maximal degree in co-relation 59013. Up to 6790 conditions per place. [2024-06-21 16:03:07,819 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 272 selfloop transitions, 201 changer transitions 0/482 dead transitions. [2024-06-21 16:03:07,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 482 transitions, 8209 flow [2024-06-21 16:03:07,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:07,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:07,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 16:03:07,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6160714285714286 [2024-06-21 16:03:07,820 INFO L175 Difference]: Start difference. First operand has 359 places, 457 transitions, 6097 flow. Second operand 8 states and 207 transitions. [2024-06-21 16:03:07,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 482 transitions, 8209 flow [2024-06-21 16:03:13,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 482 transitions, 7870 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 16:03:13,900 INFO L231 Difference]: Finished difference. Result has 364 places, 460 transitions, 6216 flow [2024-06-21 16:03:13,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6216, PETRI_PLACES=364, PETRI_TRANSITIONS=460} [2024-06-21 16:03:13,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 16:03:13,901 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 460 transitions, 6216 flow [2024-06-21 16:03:13,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:13,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:13,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:13,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:03:13,902 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:13,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1551478851, now seen corresponding path program 1 times [2024-06-21 16:03:13,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:13,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706263348] [2024-06-21 16:03:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:13,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:13,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706263348] [2024-06-21 16:03:13,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706263348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:13,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:13,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:13,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385776284] [2024-06-21 16:03:13,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:13,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:13,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:13,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:13,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:14,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:14,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 460 transitions, 6216 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:14,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:14,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:14,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:15,395 INFO L124 PetriNetUnfolderBase]: 4716/8110 cut-off events. [2024-06-21 16:03:15,395 INFO L125 PetriNetUnfolderBase]: For 1466468/1466468 co-relation queries the response was YES. [2024-06-21 16:03:15,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60079 conditions, 8110 events. 4716/8110 cut-off events. For 1466468/1466468 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59131 event pairs, 1253 based on Foata normal form. 2/8093 useless extension candidates. Maximal degree in co-relation 59904. Up to 7151 conditions per place. [2024-06-21 16:03:15,689 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 388 selfloop transitions, 98 changer transitions 2/497 dead transitions. [2024-06-21 16:03:15,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 497 transitions, 7702 flow [2024-06-21 16:03:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:03:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:03:15,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 16:03:15,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6137566137566137 [2024-06-21 16:03:15,690 INFO L175 Difference]: Start difference. First operand has 364 places, 460 transitions, 6216 flow. Second operand 9 states and 232 transitions. [2024-06-21 16:03:15,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 497 transitions, 7702 flow [2024-06-21 16:03:20,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 497 transitions, 7282 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:20,838 INFO L231 Difference]: Finished difference. Result has 368 places, 464 transitions, 6166 flow [2024-06-21 16:03:20,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6166, PETRI_PLACES=368, PETRI_TRANSITIONS=464} [2024-06-21 16:03:20,839 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 325 predicate places. [2024-06-21 16:03:20,839 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 464 transitions, 6166 flow [2024-06-21 16:03:20,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:20,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:20,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:20,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:03:20,839 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:20,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:20,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1554335811, now seen corresponding path program 2 times [2024-06-21 16:03:20,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:20,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351804949] [2024-06-21 16:03:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:20,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:20,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:20,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:20,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351804949] [2024-06-21 16:03:20,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351804949] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:20,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:20,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:20,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638063350] [2024-06-21 16:03:20,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:20,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:20,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:20,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:20,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:20,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:20,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 464 transitions, 6166 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:20,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:20,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:20,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:22,352 INFO L124 PetriNetUnfolderBase]: 4711/8109 cut-off events. [2024-06-21 16:03:22,352 INFO L125 PetriNetUnfolderBase]: For 1469169/1469169 co-relation queries the response was YES. [2024-06-21 16:03:22,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59709 conditions, 8109 events. 4711/8109 cut-off events. For 1469169/1469169 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 59161 event pairs, 1268 based on Foata normal form. 2/8097 useless extension candidates. Maximal degree in co-relation 59532. Up to 7201 conditions per place. [2024-06-21 16:03:22,472 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 387 selfloop transitions, 93 changer transitions 0/489 dead transitions. [2024-06-21 16:03:22,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 489 transitions, 7188 flow [2024-06-21 16:03:22,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 16:03:22,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6101190476190477 [2024-06-21 16:03:22,473 INFO L175 Difference]: Start difference. First operand has 368 places, 464 transitions, 6166 flow. Second operand 8 states and 205 transitions. [2024-06-21 16:03:22,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 489 transitions, 7188 flow [2024-06-21 16:03:28,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 489 transitions, 6886 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:03:28,067 INFO L231 Difference]: Finished difference. Result has 370 places, 464 transitions, 6055 flow [2024-06-21 16:03:28,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6055, PETRI_PLACES=370, PETRI_TRANSITIONS=464} [2024-06-21 16:03:28,068 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 16:03:28,068 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 464 transitions, 6055 flow [2024-06-21 16:03:28,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:28,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:28,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:28,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:03:28,068 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:28,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:28,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1297337277, now seen corresponding path program 3 times [2024-06-21 16:03:28,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:28,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310477125] [2024-06-21 16:03:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:28,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:28,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:28,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:28,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310477125] [2024-06-21 16:03:28,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310477125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:28,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:28,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:03:28,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850575063] [2024-06-21 16:03:28,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:28,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:03:28,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:28,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:03:28,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:03:28,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:28,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 464 transitions, 6055 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:28,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:28,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:28,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:29,548 INFO L124 PetriNetUnfolderBase]: 4719/8129 cut-off events. [2024-06-21 16:03:29,548 INFO L125 PetriNetUnfolderBase]: For 1488624/1488624 co-relation queries the response was YES. [2024-06-21 16:03:29,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59796 conditions, 8129 events. 4719/8129 cut-off events. For 1488624/1488624 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 59395 event pairs, 1276 based on Foata normal form. 2/8117 useless extension candidates. Maximal degree in co-relation 59618. Up to 7213 conditions per place. [2024-06-21 16:03:29,674 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 95 changer transitions 0/484 dead transitions. [2024-06-21 16:03:29,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 484 transitions, 7128 flow [2024-06-21 16:03:29,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:03:29,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:03:29,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 16:03:29,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6054421768707483 [2024-06-21 16:03:29,675 INFO L175 Difference]: Start difference. First operand has 370 places, 464 transitions, 6055 flow. Second operand 7 states and 178 transitions. [2024-06-21 16:03:29,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 484 transitions, 7128 flow [2024-06-21 16:03:35,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 484 transitions, 6922 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:35,998 INFO L231 Difference]: Finished difference. Result has 370 places, 466 transitions, 6127 flow [2024-06-21 16:03:35,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5849, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6127, PETRI_PLACES=370, PETRI_TRANSITIONS=466} [2024-06-21 16:03:35,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 327 predicate places. [2024-06-21 16:03:35,999 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 466 transitions, 6127 flow [2024-06-21 16:03:35,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:35,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:35,999 INFO 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] [2024-06-21 16:03:35,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:03:35,999 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:35,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:36,000 INFO L85 PathProgramCache]: Analyzing trace with hash -699896171, now seen corresponding path program 5 times [2024-06-21 16:03:36,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:36,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875714558] [2024-06-21 16:03:36,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:36,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:36,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:36,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875714558] [2024-06-21 16:03:36,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875714558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:36,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:36,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:36,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61652532] [2024-06-21 16:03:36,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:36,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:36,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:36,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:36,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:36,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:36,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 466 transitions, 6127 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:36,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:36,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:37,660 INFO L124 PetriNetUnfolderBase]: 4727/8128 cut-off events. [2024-06-21 16:03:37,660 INFO L125 PetriNetUnfolderBase]: For 1513215/1513215 co-relation queries the response was YES. [2024-06-21 16:03:37,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60168 conditions, 8128 events. 4727/8128 cut-off events. For 1513215/1513215 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59369 event pairs, 1260 based on Foata normal form. 2/8115 useless extension candidates. Maximal degree in co-relation 59989. Up to 7156 conditions per place. [2024-06-21 16:03:37,773 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 108 changer transitions 2/500 dead transitions. [2024-06-21 16:03:37,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 500 transitions, 7683 flow [2024-06-21 16:03:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:03:37,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:03:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 229 transitions. [2024-06-21 16:03:37,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6058201058201058 [2024-06-21 16:03:37,774 INFO L175 Difference]: Start difference. First operand has 370 places, 466 transitions, 6127 flow. Second operand 9 states and 229 transitions. [2024-06-21 16:03:37,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 500 transitions, 7683 flow [2024-06-21 16:03:44,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 500 transitions, 7428 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:44,227 INFO L231 Difference]: Finished difference. Result has 375 places, 470 transitions, 6326 flow [2024-06-21 16:03:44,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6326, PETRI_PLACES=375, PETRI_TRANSITIONS=470} [2024-06-21 16:03:44,227 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 16:03:44,228 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 470 transitions, 6326 flow [2024-06-21 16:03:44,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:44,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:44,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:44,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:03:44,228 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:44,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:44,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1430027685, now seen corresponding path program 6 times [2024-06-21 16:03:44,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:44,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285167667] [2024-06-21 16:03:44,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:44,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:44,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:44,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:44,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285167667] [2024-06-21 16:03:44,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285167667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:44,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:44,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:44,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741727306] [2024-06-21 16:03:44,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:44,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:44,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:44,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:44,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:44,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:44,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 470 transitions, 6326 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:44,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:44,345 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:44,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:45,823 INFO L124 PetriNetUnfolderBase]: 4722/8126 cut-off events. [2024-06-21 16:03:45,824 INFO L125 PetriNetUnfolderBase]: For 1515563/1515563 co-relation queries the response was YES. [2024-06-21 16:03:45,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59983 conditions, 8126 events. 4722/8126 cut-off events. For 1515563/1515563 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 59296 event pairs, 1276 based on Foata normal form. 2/8122 useless extension candidates. Maximal degree in co-relation 59802. Up to 7206 conditions per place. [2024-06-21 16:03:45,933 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 380 selfloop transitions, 103 changer transitions 0/492 dead transitions. [2024-06-21 16:03:45,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 492 transitions, 7346 flow [2024-06-21 16:03:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:45,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:45,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:03:45,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 16:03:45,934 INFO L175 Difference]: Start difference. First operand has 375 places, 470 transitions, 6326 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:03:45,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 492 transitions, 7346 flow [2024-06-21 16:03:51,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 492 transitions, 7027 flow, removed 96 selfloop flow, removed 5 redundant places. [2024-06-21 16:03:51,086 INFO L231 Difference]: Finished difference. Result has 378 places, 470 transitions, 6218 flow [2024-06-21 16:03:51,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6007, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6218, PETRI_PLACES=378, PETRI_TRANSITIONS=470} [2024-06-21 16:03:51,087 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-21 16:03:51,087 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 470 transitions, 6218 flow [2024-06-21 16:03:51,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:51,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:51,087 INFO 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] [2024-06-21 16:03:51,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:03:51,087 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:51,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:51,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1547237097, now seen corresponding path program 10 times [2024-06-21 16:03:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:51,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690696978] [2024-06-21 16:03:51,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:51,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:51,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:51,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:51,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690696978] [2024-06-21 16:03:51,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690696978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:51,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:51,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064289168] [2024-06-21 16:03:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:51,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:51,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:51,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:51,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:51,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 470 transitions, 6218 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:51,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:51,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:51,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:03:52,636 INFO L124 PetriNetUnfolderBase]: 4727/8133 cut-off events. [2024-06-21 16:03:52,637 INFO L125 PetriNetUnfolderBase]: For 1522264/1522264 co-relation queries the response was YES. [2024-06-21 16:03:52,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60085 conditions, 8133 events. 4727/8133 cut-off events. For 1522264/1522264 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 59401 event pairs, 1304 based on Foata normal form. 1/8128 useless extension candidates. Maximal degree in co-relation 59902. Up to 6835 conditions per place. [2024-06-21 16:03:52,758 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 324 selfloop transitions, 166 changer transitions 0/499 dead transitions. [2024-06-21 16:03:52,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 499 transitions, 7871 flow [2024-06-21 16:03:52,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:03:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:03:52,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 16:03:52,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6339285714285714 [2024-06-21 16:03:52,759 INFO L175 Difference]: Start difference. First operand has 378 places, 470 transitions, 6218 flow. Second operand 8 states and 213 transitions. [2024-06-21 16:03:52,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 499 transitions, 7871 flow [2024-06-21 16:03:59,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 499 transitions, 7643 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 16:03:59,768 INFO L231 Difference]: Finished difference. Result has 379 places, 473 transitions, 6383 flow [2024-06-21 16:03:59,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5990, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6383, PETRI_PLACES=379, PETRI_TRANSITIONS=473} [2024-06-21 16:03:59,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-21 16:03:59,768 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 473 transitions, 6383 flow [2024-06-21 16:03:59,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:59,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:03:59,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:03:59,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:03:59,769 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:03:59,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:03:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash -137327609, now seen corresponding path program 11 times [2024-06-21 16:03:59,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:03:59,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710355989] [2024-06-21 16:03:59,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:03:59,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:03:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:03:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:03:59,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:03:59,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710355989] [2024-06-21 16:03:59,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710355989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:03:59,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:03:59,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:03:59,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274608398] [2024-06-21 16:03:59,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:03:59,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:03:59,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:03:59,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:03:59,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:03:59,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:03:59,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 473 transitions, 6383 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:03:59,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:03:59,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:03:59,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:01,291 INFO L124 PetriNetUnfolderBase]: 4740/8157 cut-off events. [2024-06-21 16:04:01,292 INFO L125 PetriNetUnfolderBase]: For 1554710/1554710 co-relation queries the response was YES. [2024-06-21 16:04:01,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60734 conditions, 8157 events. 4740/8157 cut-off events. For 1554710/1554710 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59604 event pairs, 1305 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60550. Up to 6845 conditions per place. [2024-06-21 16:04:01,406 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 321 selfloop transitions, 173 changer transitions 0/503 dead transitions. [2024-06-21 16:04:01,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 503 transitions, 8371 flow [2024-06-21 16:04:01,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:01,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 16:04:01,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-21 16:04:01,407 INFO L175 Difference]: Start difference. First operand has 379 places, 473 transitions, 6383 flow. Second operand 8 states and 211 transitions. [2024-06-21 16:04:01,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 503 transitions, 8371 flow [2024-06-21 16:04:07,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 503 transitions, 8108 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:04:07,558 INFO L231 Difference]: Finished difference. Result has 383 places, 479 transitions, 6590 flow [2024-06-21 16:04:07,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6590, PETRI_PLACES=383, PETRI_TRANSITIONS=479} [2024-06-21 16:04:07,560 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 16:04:07,560 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 479 transitions, 6590 flow [2024-06-21 16:04:07,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:07,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:07,560 INFO 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] [2024-06-21 16:04:07,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:04:07,561 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:07,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:07,561 INFO L85 PathProgramCache]: Analyzing trace with hash 226220623, now seen corresponding path program 12 times [2024-06-21 16:04:07,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:07,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772649356] [2024-06-21 16:04:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:07,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:07,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:07,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:07,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772649356] [2024-06-21 16:04:07,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772649356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:07,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:07,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:07,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877769853] [2024-06-21 16:04:07,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:07,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:07,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:07,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:07,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:07,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:04:07,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 479 transitions, 6590 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:07,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:07,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:04:07,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:09,131 INFO L124 PetriNetUnfolderBase]: 4737/8153 cut-off events. [2024-06-21 16:04:09,131 INFO L125 PetriNetUnfolderBase]: For 1567824/1567824 co-relation queries the response was YES. [2024-06-21 16:04:09,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60755 conditions, 8153 events. 4737/8153 cut-off events. For 1567824/1567824 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59601 event pairs, 1308 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60568. Up to 6843 conditions per place. [2024-06-21 16:04:09,245 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 171 changer transitions 0/505 dead transitions. [2024-06-21 16:04:09,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 505 transitions, 8210 flow [2024-06-21 16:04:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 212 transitions. [2024-06-21 16:04:09,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6309523809523809 [2024-06-21 16:04:09,246 INFO L175 Difference]: Start difference. First operand has 383 places, 479 transitions, 6590 flow. Second operand 8 states and 212 transitions. [2024-06-21 16:04:09,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 505 transitions, 8210 flow [2024-06-21 16:04:16,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 505 transitions, 7943 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 16:04:16,884 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6671 flow [2024-06-21 16:04:16,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6671, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-21 16:04:16,885 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 16:04:16,885 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6671 flow [2024-06-21 16:04:16,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:16,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:16,885 INFO 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] [2024-06-21 16:04:16,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:04:16,885 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:16,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:16,885 INFO L85 PathProgramCache]: Analyzing trace with hash -491746391, now seen corresponding path program 13 times [2024-06-21 16:04:16,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:16,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72071560] [2024-06-21 16:04:16,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:16,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:16,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:16,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72071560] [2024-06-21 16:04:16,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72071560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:16,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:16,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:16,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149227711] [2024-06-21 16:04:16,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:16,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:16,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:16,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:04:16,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6671 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:16,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:16,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:04:16,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:18,506 INFO L124 PetriNetUnfolderBase]: 4734/8157 cut-off events. [2024-06-21 16:04:18,506 INFO L125 PetriNetUnfolderBase]: For 1579845/1579845 co-relation queries the response was YES. [2024-06-21 16:04:18,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60773 conditions, 8157 events. 4734/8157 cut-off events. For 1579845/1579845 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59678 event pairs, 1312 based on Foata normal form. 1/8152 useless extension candidates. Maximal degree in co-relation 60584. Up to 6841 conditions per place. [2024-06-21 16:04:18,618 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 175 changer transitions 0/503 dead transitions. [2024-06-21 16:04:18,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 503 transitions, 8569 flow [2024-06-21 16:04:18,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:18,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:18,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 210 transitions. [2024-06-21 16:04:18,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 16:04:18,619 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6671 flow. Second operand 8 states and 210 transitions. [2024-06-21 16:04:18,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 503 transitions, 8569 flow [2024-06-21 16:04:24,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 503 transitions, 8110 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:04:24,933 INFO L231 Difference]: Finished difference. Result has 387 places, 479 transitions, 6568 flow [2024-06-21 16:04:24,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6212, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6568, PETRI_PLACES=387, PETRI_TRANSITIONS=479} [2024-06-21 16:04:24,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 16:04:24,934 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 479 transitions, 6568 flow [2024-06-21 16:04:24,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:24,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:24,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:04:24,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:04:24,934 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:24,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 154504309, now seen corresponding path program 14 times [2024-06-21 16:04:24,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:24,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089166262] [2024-06-21 16:04:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:24,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:24,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:24,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089166262] [2024-06-21 16:04:24,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089166262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:24,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:24,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:24,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813641858] [2024-06-21 16:04:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:24,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:24,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:24,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:25,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:04:25,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 479 transitions, 6568 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:25,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:25,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:04:25,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:26,562 INFO L124 PetriNetUnfolderBase]: 4731/8153 cut-off events. [2024-06-21 16:04:26,562 INFO L125 PetriNetUnfolderBase]: For 1589511/1589511 co-relation queries the response was YES. [2024-06-21 16:04:26,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60706 conditions, 8153 events. 4731/8153 cut-off events. For 1589511/1589511 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 59600 event pairs, 1316 based on Foata normal form. 1/8148 useless extension candidates. Maximal degree in co-relation 60517. Up to 6839 conditions per place. [2024-06-21 16:04:26,676 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 318 selfloop transitions, 178 changer transitions 0/505 dead transitions. [2024-06-21 16:04:26,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 505 transitions, 8196 flow [2024-06-21 16:04:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:26,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:26,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 16:04:26,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2024-06-21 16:04:26,677 INFO L175 Difference]: Start difference. First operand has 387 places, 479 transitions, 6568 flow. Second operand 8 states and 211 transitions. [2024-06-21 16:04:26,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 505 transitions, 8196 flow [2024-06-21 16:04:34,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 505 transitions, 7842 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:04:34,586 INFO L231 Difference]: Finished difference. Result has 389 places, 479 transitions, 6576 flow [2024-06-21 16:04:34,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6214, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6576, PETRI_PLACES=389, PETRI_TRANSITIONS=479} [2024-06-21 16:04:34,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-21 16:04:34,586 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 479 transitions, 6576 flow [2024-06-21 16:04:34,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:34,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:34,587 INFO 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] [2024-06-21 16:04:34,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:04:34,587 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:34,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:34,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1497597827, now seen corresponding path program 15 times [2024-06-21 16:04:34,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:34,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564120502] [2024-06-21 16:04:34,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:34,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:34,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:34,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:34,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564120502] [2024-06-21 16:04:34,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564120502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:34,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:34,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:34,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646259456] [2024-06-21 16:04:34,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:34,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:34,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:34,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:04:34,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 479 transitions, 6576 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:34,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:34,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:04:34,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:36,220 INFO L124 PetriNetUnfolderBase]: 4752/8176 cut-off events. [2024-06-21 16:04:36,220 INFO L125 PetriNetUnfolderBase]: For 1633773/1633773 co-relation queries the response was YES. [2024-06-21 16:04:36,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61402 conditions, 8176 events. 4752/8176 cut-off events. For 1633773/1633773 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59772 event pairs, 1291 based on Foata normal form. 1/8171 useless extension candidates. Maximal degree in co-relation 61211. Up to 6861 conditions per place. [2024-06-21 16:04:36,333 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 190 changer transitions 0/513 dead transitions. [2024-06-21 16:04:36,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 513 transitions, 8934 flow [2024-06-21 16:04:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:04:36,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:04:36,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 256 transitions. [2024-06-21 16:04:36,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-21 16:04:36,334 INFO L175 Difference]: Start difference. First operand has 389 places, 479 transitions, 6576 flow. Second operand 10 states and 256 transitions. [2024-06-21 16:04:36,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 513 transitions, 8934 flow [2024-06-21 16:04:42,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 513 transitions, 8528 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:04:42,491 INFO L231 Difference]: Finished difference. Result has 392 places, 486 transitions, 6701 flow [2024-06-21 16:04:42,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6182, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6701, PETRI_PLACES=392, PETRI_TRANSITIONS=486} [2024-06-21 16:04:42,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-21 16:04:42,492 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 486 transitions, 6701 flow [2024-06-21 16:04:42,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:42,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:42,492 INFO 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] [2024-06-21 16:04:42,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:04:42,493 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:42,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:42,493 INFO L85 PathProgramCache]: Analyzing trace with hash 538617559, now seen corresponding path program 16 times [2024-06-21 16:04:42,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:42,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790576487] [2024-06-21 16:04:42,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:42,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:42,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:42,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:42,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790576487] [2024-06-21 16:04:42,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790576487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:42,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:42,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:04:42,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065578204] [2024-06-21 16:04:42,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:42,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:04:42,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:42,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:04:42,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:04:42,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:04:42,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 486 transitions, 6701 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:42,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:42,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:04:42,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:44,191 INFO L124 PetriNetUnfolderBase]: 4746/8180 cut-off events. [2024-06-21 16:04:44,192 INFO L125 PetriNetUnfolderBase]: For 1644306/1644306 co-relation queries the response was YES. [2024-06-21 16:04:44,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61211 conditions, 8180 events. 4746/8180 cut-off events. For 1644306/1644306 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 59838 event pairs, 1301 based on Foata normal form. 2/8176 useless extension candidates. Maximal degree in co-relation 61019. Up to 6856 conditions per place. [2024-06-21 16:04:44,304 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 314 selfloop transitions, 184 changer transitions 0/507 dead transitions. [2024-06-21 16:04:44,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 507 transitions, 8617 flow [2024-06-21 16:04:44,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:04:44,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:04:44,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 16:04:44,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-21 16:04:44,305 INFO L175 Difference]: Start difference. First operand has 392 places, 486 transitions, 6701 flow. Second operand 8 states and 209 transitions. [2024-06-21 16:04:44,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 507 transitions, 8617 flow [2024-06-21 16:04:50,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 507 transitions, 8225 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 16:04:50,761 INFO L231 Difference]: Finished difference. Result has 393 places, 486 transitions, 6684 flow [2024-06-21 16:04:50,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=184, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6684, PETRI_PLACES=393, PETRI_TRANSITIONS=486} [2024-06-21 16:04:50,762 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 16:04:50,762 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 486 transitions, 6684 flow [2024-06-21 16:04:50,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:50,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:04:50,762 INFO 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] [2024-06-21 16:04:50,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:04:50,762 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:04:50,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:04:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1187260649, now seen corresponding path program 17 times [2024-06-21 16:04:50,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:04:50,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534196488] [2024-06-21 16:04:50,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:04:50,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:04:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:04:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:04:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:04:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534196488] [2024-06-21 16:04:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534196488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:04:50,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:04:50,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:04:50,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173940531] [2024-06-21 16:04:50,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:04:50,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:04:50,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:04:50,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:04:50,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:04:50,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:04:50,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 486 transitions, 6684 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:04:50,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:04:50,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:04:50,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:04:52,400 INFO L124 PetriNetUnfolderBase]: 4756/8147 cut-off events. [2024-06-21 16:04:52,400 INFO L125 PetriNetUnfolderBase]: For 1669414/1669414 co-relation queries the response was YES. [2024-06-21 16:04:52,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61387 conditions, 8147 events. 4756/8147 cut-off events. For 1669414/1669414 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 59429 event pairs, 1360 based on Foata normal form. 2/8120 useless extension candidates. Maximal degree in co-relation 61193. Up to 6866 conditions per place. [2024-06-21 16:04:52,511 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 184 changer transitions 0/504 dead transitions. [2024-06-21 16:04:52,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 504 transitions, 8667 flow [2024-06-21 16:04:52,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:04:52,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:04:52,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:04:52,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:04:52,512 INFO L175 Difference]: Start difference. First operand has 393 places, 486 transitions, 6684 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:04:52,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 504 transitions, 8667 flow [2024-06-21 16:05:01,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 504 transitions, 8283 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 16:05:01,047 INFO L231 Difference]: Finished difference. Result has 393 places, 490 transitions, 6760 flow [2024-06-21 16:05:01,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6306, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6760, PETRI_PLACES=393, PETRI_TRANSITIONS=490} [2024-06-21 16:05:01,047 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-21 16:05:01,047 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 490 transitions, 6760 flow [2024-06-21 16:05:01,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:01,048 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:01,048 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:01,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:05:01,048 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:01,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:01,048 INFO L85 PathProgramCache]: Analyzing trace with hash 862542325, now seen corresponding path program 18 times [2024-06-21 16:05:01,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:01,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539094540] [2024-06-21 16:05:01,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:01,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:01,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:01,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:01,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:01,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539094540] [2024-06-21 16:05:01,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539094540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:01,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:01,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:05:01,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535613979] [2024-06-21 16:05:01,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:01,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:05:01,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:01,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:05:01,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:05:01,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:05:01,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 490 transitions, 6760 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:01,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:01,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:05:01,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:02,659 INFO L124 PetriNetUnfolderBase]: 4766/8165 cut-off events. [2024-06-21 16:05:02,659 INFO L125 PetriNetUnfolderBase]: For 1691677/1691677 co-relation queries the response was YES. [2024-06-21 16:05:02,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61633 conditions, 8165 events. 4766/8165 cut-off events. For 1691677/1691677 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59602 event pairs, 1360 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61438. Up to 6876 conditions per place. [2024-06-21 16:05:02,773 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-21 16:05:02,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 508 transitions, 8759 flow [2024-06-21 16:05:02,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:02,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:05:02,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:05:02,774 INFO L175 Difference]: Start difference. First operand has 393 places, 490 transitions, 6760 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:05:02,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 508 transitions, 8759 flow [2024-06-21 16:05:09,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 508 transitions, 8092 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:05:09,814 INFO L231 Difference]: Finished difference. Result has 394 places, 494 transitions, 6559 flow [2024-06-21 16:05:09,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6127, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6559, PETRI_PLACES=394, PETRI_TRANSITIONS=494} [2024-06-21 16:05:09,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 16:05:09,814 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 494 transitions, 6559 flow [2024-06-21 16:05:09,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:09,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:09,814 INFO 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] [2024-06-21 16:05:09,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:05:09,815 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:09,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:09,815 INFO L85 PathProgramCache]: Analyzing trace with hash 509223413, now seen corresponding path program 19 times [2024-06-21 16:05:09,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:09,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160569675] [2024-06-21 16:05:09,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:09,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:09,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:09,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:09,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160569675] [2024-06-21 16:05:09,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160569675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:09,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:09,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:05:09,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676671318] [2024-06-21 16:05:09,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:09,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:05:09,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:09,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:05:09,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:05:09,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:05:09,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 494 transitions, 6559 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:09,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:09,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:05:09,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:11,407 INFO L124 PetriNetUnfolderBase]: 4760/8165 cut-off events. [2024-06-21 16:05:11,407 INFO L125 PetriNetUnfolderBase]: For 1687220/1687220 co-relation queries the response was YES. [2024-06-21 16:05:11,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61283 conditions, 8165 events. 4760/8165 cut-off events. For 1687220/1687220 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 59673 event pairs, 1368 based on Foata normal form. 2/8138 useless extension candidates. Maximal degree in co-relation 61088. Up to 6871 conditions per place. [2024-06-21 16:05:11,522 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 186 changer transitions 0/508 dead transitions. [2024-06-21 16:05:11,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 508 transitions, 8477 flow [2024-06-21 16:05:11,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:05:11,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:05:11,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:05:11,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 16:05:11,523 INFO L175 Difference]: Start difference. First operand has 394 places, 494 transitions, 6559 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:05:11,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 508 transitions, 8477 flow [2024-06-21 16:05:19,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 508 transitions, 8120 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:05:19,219 INFO L231 Difference]: Finished difference. Result has 397 places, 494 transitions, 6581 flow [2024-06-21 16:05:19,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6202, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6581, PETRI_PLACES=397, PETRI_TRANSITIONS=494} [2024-06-21 16:05:19,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 16:05:19,219 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 494 transitions, 6581 flow [2024-06-21 16:05:19,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:19,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:19,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:19,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:05:19,220 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:19,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:19,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1326860125, now seen corresponding path program 7 times [2024-06-21 16:05:19,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:19,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116559798] [2024-06-21 16:05:19,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:19,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:19,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:19,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116559798] [2024-06-21 16:05:19,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116559798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:19,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:19,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:19,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166435468] [2024-06-21 16:05:19,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:19,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:19,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:19,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:19,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:19,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:05:19,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 494 transitions, 6581 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:19,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:19,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:05:19,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:20,882 INFO L124 PetriNetUnfolderBase]: 4796/8237 cut-off events. [2024-06-21 16:05:20,883 INFO L125 PetriNetUnfolderBase]: For 1804859/1804859 co-relation queries the response was YES. [2024-06-21 16:05:20,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62145 conditions, 8237 events. 4796/8237 cut-off events. For 1804859/1804859 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 60347 event pairs, 1303 based on Foata normal form. 10/8233 useless extension candidates. Maximal degree in co-relation 61949. Up to 7284 conditions per place. [2024-06-21 16:05:20,999 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 401 selfloop transitions, 102 changer transitions 0/512 dead transitions. [2024-06-21 16:05:20,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 512 transitions, 7751 flow [2024-06-21 16:05:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:05:20,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:05:20,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 16:05:20,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 16:05:20,999 INFO L175 Difference]: Start difference. First operand has 397 places, 494 transitions, 6581 flow. Second operand 8 states and 198 transitions. [2024-06-21 16:05:21,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 512 transitions, 7751 flow [2024-06-21 16:05:29,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 512 transitions, 7286 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:05:29,124 INFO L231 Difference]: Finished difference. Result has 397 places, 496 transitions, 6444 flow [2024-06-21 16:05:29,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6116, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6444, PETRI_PLACES=397, PETRI_TRANSITIONS=496} [2024-06-21 16:05:29,125 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 16:05:29,125 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 496 transitions, 6444 flow [2024-06-21 16:05:29,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:29,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:29,125 INFO 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] [2024-06-21 16:05:29,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:05:29,125 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:29,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:29,126 INFO L85 PathProgramCache]: Analyzing trace with hash 277623653, now seen corresponding path program 8 times [2024-06-21 16:05:29,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:29,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729828512] [2024-06-21 16:05:29,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:29,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:29,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:29,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:29,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729828512] [2024-06-21 16:05:29,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729828512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:29,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:29,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:29,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575892887] [2024-06-21 16:05:29,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:29,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:29,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:29,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:29,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:29,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:05:29,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 496 transitions, 6444 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:29,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:29,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:05:29,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:30,812 INFO L124 PetriNetUnfolderBase]: 4819/8286 cut-off events. [2024-06-21 16:05:30,812 INFO L125 PetriNetUnfolderBase]: For 1806101/1806101 co-relation queries the response was YES. [2024-06-21 16:05:30,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62126 conditions, 8286 events. 4819/8286 cut-off events. For 1806101/1806101 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60899 event pairs, 1298 based on Foata normal form. 10/8282 useless extension candidates. Maximal degree in co-relation 61931. Up to 7193 conditions per place. [2024-06-21 16:05:30,939 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 403 selfloop transitions, 107 changer transitions 0/519 dead transitions. [2024-06-21 16:05:30,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 519 transitions, 7656 flow [2024-06-21 16:05:30,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:30,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:30,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 222 transitions. [2024-06-21 16:05:30,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873015873015873 [2024-06-21 16:05:30,940 INFO L175 Difference]: Start difference. First operand has 397 places, 496 transitions, 6444 flow. Second operand 9 states and 222 transitions. [2024-06-21 16:05:30,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 519 transitions, 7656 flow [2024-06-21 16:05:37,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 519 transitions, 7358 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:05:37,827 INFO L231 Difference]: Finished difference. Result has 400 places, 498 transitions, 6487 flow [2024-06-21 16:05:37,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6146, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6487, PETRI_PLACES=400, PETRI_TRANSITIONS=498} [2024-06-21 16:05:37,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-21 16:05:37,828 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 498 transitions, 6487 flow [2024-06-21 16:05:37,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:37,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:37,829 INFO 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] [2024-06-21 16:05:37,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:05:37,829 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:37,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:37,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1503976565, now seen corresponding path program 20 times [2024-06-21 16:05:37,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:37,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912343631] [2024-06-21 16:05:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:37,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:37,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:37,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:37,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912343631] [2024-06-21 16:05:37,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912343631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:37,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:37,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:37,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747670589] [2024-06-21 16:05:37,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:37,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:37,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:37,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:37,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:05:37,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 498 transitions, 6487 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:37,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:37,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:05:37,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:39,523 INFO L124 PetriNetUnfolderBase]: 4813/8262 cut-off events. [2024-06-21 16:05:39,523 INFO L125 PetriNetUnfolderBase]: For 1712991/1712991 co-relation queries the response was YES. [2024-06-21 16:05:39,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61554 conditions, 8262 events. 4813/8262 cut-off events. For 1712991/1712991 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 60670 event pairs, 1375 based on Foata normal form. 2/8237 useless extension candidates. Maximal degree in co-relation 61358. Up to 6959 conditions per place. [2024-06-21 16:05:39,639 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 190 changer transitions 0/512 dead transitions. [2024-06-21 16:05:39,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 512 transitions, 8129 flow [2024-06-21 16:05:39,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:05:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:05:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 16:05:39,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-21 16:05:39,640 INFO L175 Difference]: Start difference. First operand has 400 places, 498 transitions, 6487 flow. Second operand 8 states and 202 transitions. [2024-06-21 16:05:39,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 512 transitions, 8129 flow [2024-06-21 16:05:48,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 512 transitions, 7810 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 16:05:48,030 INFO L231 Difference]: Finished difference. Result has 401 places, 498 transitions, 6555 flow [2024-06-21 16:05:48,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6555, PETRI_PLACES=401, PETRI_TRANSITIONS=498} [2024-06-21 16:05:48,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 16:05:48,030 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 498 transitions, 6555 flow [2024-06-21 16:05:48,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:48,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:48,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:05:48,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:05:48,031 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:48,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:48,031 INFO L85 PathProgramCache]: Analyzing trace with hash 72995885, now seen corresponding path program 4 times [2024-06-21 16:05:48,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:48,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384567384] [2024-06-21 16:05:48,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:48,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:48,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:48,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:48,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:48,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384567384] [2024-06-21 16:05:48,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384567384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:48,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:48,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:48,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525174235] [2024-06-21 16:05:48,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:48,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:48,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:48,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:48,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:05:48,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 498 transitions, 6555 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:48,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:48,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:05:48,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:05:49,729 INFO L124 PetriNetUnfolderBase]: 4834/8327 cut-off events. [2024-06-21 16:05:49,729 INFO L125 PetriNetUnfolderBase]: For 1753448/1753448 co-relation queries the response was YES. [2024-06-21 16:05:49,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62187 conditions, 8327 events. 4834/8327 cut-off events. For 1753448/1753448 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61137 event pairs, 1271 based on Foata normal form. 2/8324 useless extension candidates. Maximal degree in co-relation 61990. Up to 7331 conditions per place. [2024-06-21 16:05:49,851 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 433 selfloop transitions, 88 changer transitions 2/532 dead transitions. [2024-06-21 16:05:49,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 532 transitions, 8147 flow [2024-06-21 16:05:49,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:05:49,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:05:49,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-06-21 16:05:49,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6084656084656085 [2024-06-21 16:05:49,852 INFO L175 Difference]: Start difference. First operand has 401 places, 498 transitions, 6555 flow. Second operand 9 states and 230 transitions. [2024-06-21 16:05:49,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 532 transitions, 8147 flow [2024-06-21 16:05:59,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 532 transitions, 7683 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 16:05:59,338 INFO L231 Difference]: Finished difference. Result has 403 places, 502 transitions, 6449 flow [2024-06-21 16:05:59,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6091, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6449, PETRI_PLACES=403, PETRI_TRANSITIONS=502} [2024-06-21 16:05:59,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-21 16:05:59,339 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 502 transitions, 6449 flow [2024-06-21 16:05:59,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:59,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:05:59,339 INFO 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] [2024-06-21 16:05:59,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:05:59,339 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:05:59,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:05:59,339 INFO L85 PathProgramCache]: Analyzing trace with hash -636742265, now seen corresponding path program 5 times [2024-06-21 16:05:59,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:05:59,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315390505] [2024-06-21 16:05:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:05:59,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:05:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:05:59,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:05:59,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:05:59,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315390505] [2024-06-21 16:05:59,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315390505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:05:59,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:05:59,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:05:59,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48630392] [2024-06-21 16:05:59,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:05:59,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:05:59,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:05:59,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:05:59,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:05:59,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:05:59,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 502 transitions, 6449 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:05:59,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:05:59,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:05:59,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:01,100 INFO L124 PetriNetUnfolderBase]: 4829/8330 cut-off events. [2024-06-21 16:06:01,100 INFO L125 PetriNetUnfolderBase]: For 1751443/1751443 co-relation queries the response was YES. [2024-06-21 16:06:01,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61700 conditions, 8330 events. 4829/8330 cut-off events. For 1751443/1751443 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 61260 event pairs, 1290 based on Foata normal form. 2/8328 useless extension candidates. Maximal degree in co-relation 61500. Up to 7381 conditions per place. [2024-06-21 16:06:01,237 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 83 changer transitions 0/524 dead transitions. [2024-06-21 16:06:01,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 524 transitions, 7533 flow [2024-06-21 16:06:01,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:06:01,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 16:06:01,238 INFO L175 Difference]: Start difference. First operand has 403 places, 502 transitions, 6449 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:06:01,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 524 transitions, 7533 flow [2024-06-21 16:06:09,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 524 transitions, 7243 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-21 16:06:09,162 INFO L231 Difference]: Finished difference. Result has 405 places, 502 transitions, 6330 flow [2024-06-21 16:06:09,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6330, PETRI_PLACES=405, PETRI_TRANSITIONS=502} [2024-06-21 16:06:09,162 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 16:06:09,163 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 502 transitions, 6330 flow [2024-06-21 16:06:09,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:09,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:09,163 INFO 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] [2024-06-21 16:06:09,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:06:09,163 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:09,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:09,163 INFO L85 PathProgramCache]: Analyzing trace with hash 163084117, now seen corresponding path program 6 times [2024-06-21 16:06:09,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:09,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931514898] [2024-06-21 16:06:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:09,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:09,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:09,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:09,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931514898] [2024-06-21 16:06:09,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931514898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:09,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:09,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:09,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432140985] [2024-06-21 16:06:09,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:09,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:09,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:09,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:09,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:09,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:06:09,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 502 transitions, 6330 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:09,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:09,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:06:09,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:10,921 INFO L124 PetriNetUnfolderBase]: 4896/8443 cut-off events. [2024-06-21 16:06:10,921 INFO L125 PetriNetUnfolderBase]: For 1894389/1894389 co-relation queries the response was YES. [2024-06-21 16:06:11,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64169 conditions, 8443 events. 4896/8443 cut-off events. For 1894389/1894389 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 62234 event pairs, 1302 based on Foata normal form. 2/8440 useless extension candidates. Maximal degree in co-relation 63968. Up to 7395 conditions per place. [2024-06-21 16:06:11,064 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 439 selfloop transitions, 90 changer transitions 0/538 dead transitions. [2024-06-21 16:06:11,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 538 transitions, 7956 flow [2024-06-21 16:06:11,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:06:11,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:06:11,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 253 transitions. [2024-06-21 16:06:11,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6023809523809524 [2024-06-21 16:06:11,065 INFO L175 Difference]: Start difference. First operand has 405 places, 502 transitions, 6330 flow. Second operand 10 states and 253 transitions. [2024-06-21 16:06:11,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 538 transitions, 7956 flow [2024-06-21 16:06:20,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 538 transitions, 7770 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:06:20,268 INFO L231 Difference]: Finished difference. Result has 409 places, 506 transitions, 6516 flow [2024-06-21 16:06:20,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6516, PETRI_PLACES=409, PETRI_TRANSITIONS=506} [2024-06-21 16:06:20,269 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-21 16:06:20,269 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 506 transitions, 6516 flow [2024-06-21 16:06:20,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:20,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:20,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:20,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:06:20,269 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:20,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash 1297886105, now seen corresponding path program 7 times [2024-06-21 16:06:20,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:20,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743326903] [2024-06-21 16:06:20,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:20,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:20,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:20,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743326903] [2024-06-21 16:06:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743326903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:20,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:20,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186017631] [2024-06-21 16:06:20,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:20,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:20,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:20,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:20,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:06:20,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 506 transitions, 6516 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:20,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:20,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:06:20,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:22,065 INFO L124 PetriNetUnfolderBase]: 4904/8463 cut-off events. [2024-06-21 16:06:22,066 INFO L125 PetriNetUnfolderBase]: For 1920766/1920766 co-relation queries the response was YES. [2024-06-21 16:06:22,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64704 conditions, 8463 events. 4904/8463 cut-off events. For 1920766/1920766 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 62491 event pairs, 1312 based on Foata normal form. 2/8461 useless extension candidates. Maximal degree in co-relation 64501. Up to 7494 conditions per place. [2024-06-21 16:06:22,198 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 85 changer transitions 0/532 dead transitions. [2024-06-21 16:06:22,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 532 transitions, 7713 flow [2024-06-21 16:06:22,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:06:22,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:06:22,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 245 transitions. [2024-06-21 16:06:22,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 16:06:22,199 INFO L175 Difference]: Start difference. First operand has 409 places, 506 transitions, 6516 flow. Second operand 10 states and 245 transitions. [2024-06-21 16:06:22,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 532 transitions, 7713 flow [2024-06-21 16:06:30,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 532 transitions, 7451 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 16:06:30,641 INFO L231 Difference]: Finished difference. Result has 412 places, 508 transitions, 6526 flow [2024-06-21 16:06:30,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6266, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6526, PETRI_PLACES=412, PETRI_TRANSITIONS=508} [2024-06-21 16:06:30,641 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 16:06:30,641 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 508 transitions, 6526 flow [2024-06-21 16:06:30,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:30,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:30,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:30,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:06:30,642 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:30,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1640124245, now seen corresponding path program 8 times [2024-06-21 16:06:30,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:30,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686294014] [2024-06-21 16:06:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:30,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:30,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:30,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:30,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686294014] [2024-06-21 16:06:30,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686294014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:30,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:30,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:30,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675095126] [2024-06-21 16:06:30,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:30,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:30,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:30,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:30,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:30,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:06:30,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 508 transitions, 6526 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:30,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:30,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:06:30,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:32,433 INFO L124 PetriNetUnfolderBase]: 4912/8479 cut-off events. [2024-06-21 16:06:32,433 INFO L125 PetriNetUnfolderBase]: For 1944067/1944067 co-relation queries the response was YES. [2024-06-21 16:06:32,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64809 conditions, 8479 events. 4912/8479 cut-off events. For 1944067/1944067 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62671 event pairs, 1118 based on Foata normal form. 2/8477 useless extension candidates. Maximal degree in co-relation 64605. Up to 6669 conditions per place. [2024-06-21 16:06:32,564 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 109 changer transitions 0/546 dead transitions. [2024-06-21 16:06:32,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 546 transitions, 8423 flow [2024-06-21 16:06:32,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:32,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:32,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-21 16:06:32,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-21 16:06:32,565 INFO L175 Difference]: Start difference. First operand has 412 places, 508 transitions, 6526 flow. Second operand 9 states and 237 transitions. [2024-06-21 16:06:32,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 546 transitions, 8423 flow [2024-06-21 16:06:42,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 546 transitions, 8190 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-21 16:06:42,163 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6603 flow [2024-06-21 16:06:42,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6603, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-21 16:06:42,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 16:06:42,164 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6603 flow [2024-06-21 16:06:42,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:42,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:42,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:06:42,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:06:42,164 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:42,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:42,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1189266169, now seen corresponding path program 9 times [2024-06-21 16:06:42,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:42,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827598238] [2024-06-21 16:06:42,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:42,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:42,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:42,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827598238] [2024-06-21 16:06:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827598238] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:42,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:42,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:42,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293882682] [2024-06-21 16:06:42,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:42,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:42,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:42,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:42,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:42,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:06:42,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6603 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:42,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:42,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:06:42,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:43,902 INFO L124 PetriNetUnfolderBase]: 4887/8432 cut-off events. [2024-06-21 16:06:43,902 INFO L125 PetriNetUnfolderBase]: For 1944397/1944397 co-relation queries the response was YES. [2024-06-21 16:06:44,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63628 conditions, 8432 events. 4887/8432 cut-off events. For 1944397/1944397 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62229 event pairs, 1129 based on Foata normal form. 8/8436 useless extension candidates. Maximal degree in co-relation 63423. Up to 6655 conditions per place. [2024-06-21 16:06:44,044 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 428 selfloop transitions, 106 changer transitions 0/543 dead transitions. [2024-06-21 16:06:44,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 543 transitions, 8091 flow [2024-06-21 16:06:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:06:44,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:06:44,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-06-21 16:06:44,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:06:44,045 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6603 flow. Second operand 9 states and 234 transitions. [2024-06-21 16:06:44,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 543 transitions, 8091 flow [2024-06-21 16:06:53,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 543 transitions, 7722 flow, removed 71 selfloop flow, removed 9 redundant places. [2024-06-21 16:06:53,116 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6452 flow [2024-06-21 16:06:53,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6234, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6452, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-21 16:06:53,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 16:06:53,117 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6452 flow [2024-06-21 16:06:53,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:53,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:06:53,117 INFO 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] [2024-06-21 16:06:53,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:06:53,117 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:06:53,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:06:53,117 INFO L85 PathProgramCache]: Analyzing trace with hash 104027989, now seen corresponding path program 10 times [2024-06-21 16:06:53,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:06:53,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843044401] [2024-06-21 16:06:53,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:06:53,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:06:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:06:53,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:06:53,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:06:53,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843044401] [2024-06-21 16:06:53,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843044401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:06:53,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:06:53,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:06:53,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654846945] [2024-06-21 16:06:53,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:06:53,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:06:53,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:06:53,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:06:53,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:06:53,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:06:53,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6452 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:06:53,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:06:53,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:06:53,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:06:55,060 INFO L124 PetriNetUnfolderBase]: 4864/8405 cut-off events. [2024-06-21 16:06:55,061 INFO L125 PetriNetUnfolderBase]: For 1862948/1862948 co-relation queries the response was YES. [2024-06-21 16:06:55,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61335 conditions, 8405 events. 4864/8405 cut-off events. For 1862948/1862948 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 62075 event pairs, 1276 based on Foata normal form. 10/8411 useless extension candidates. Maximal degree in co-relation 61132. Up to 7156 conditions per place. [2024-06-21 16:06:55,182 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 440 selfloop transitions, 88 changer transitions 0/537 dead transitions. [2024-06-21 16:06:55,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 537 transitions, 7914 flow [2024-06-21 16:06:55,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:06:55,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:06:55,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 16:06:55,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:06:55,183 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6452 flow. Second operand 8 states and 208 transitions. [2024-06-21 16:06:55,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 537 transitions, 7914 flow [2024-06-21 16:07:02,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 537 transitions, 7627 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 16:07:02,804 INFO L231 Difference]: Finished difference. Result has 413 places, 510 transitions, 6348 flow [2024-06-21 16:07:02,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6165, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6348, PETRI_PLACES=413, PETRI_TRANSITIONS=510} [2024-06-21 16:07:02,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 16:07:02,805 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 510 transitions, 6348 flow [2024-06-21 16:07:02,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:02,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:02,805 INFO 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] [2024-06-21 16:07:02,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:07:02,805 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:02,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:02,805 INFO L85 PathProgramCache]: Analyzing trace with hash 93552469, now seen corresponding path program 11 times [2024-06-21 16:07:02,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:02,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345197734] [2024-06-21 16:07:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:02,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:02,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:02,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:02,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345197734] [2024-06-21 16:07:02,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345197734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:02,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:02,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:07:02,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818691085] [2024-06-21 16:07:02,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:02,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:07:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:02,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:07:02,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:07:02,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:07:02,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 510 transitions, 6348 flow. Second operand has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:02,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:02,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:07:02,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:04,803 INFO L124 PetriNetUnfolderBase]: 4834/8357 cut-off events. [2024-06-21 16:07:04,803 INFO L125 PetriNetUnfolderBase]: For 1756014/1756014 co-relation queries the response was YES. [2024-06-21 16:07:04,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59027 conditions, 8357 events. 4834/8357 cut-off events. For 1756014/1756014 co-relation queries the response was YES. Maximal size of possible extension queue 578. Compared 61726 event pairs, 1282 based on Foata normal form. 10/8363 useless extension candidates. Maximal degree in co-relation 58823. Up to 7356 conditions per place. [2024-06-21 16:07:04,930 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 441 selfloop transitions, 82 changer transitions 0/532 dead transitions. [2024-06-21 16:07:04,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 532 transitions, 7460 flow [2024-06-21 16:07:04,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:07:04,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:07:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 16:07:04,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 16:07:04,931 INFO L175 Difference]: Start difference. First operand has 413 places, 510 transitions, 6348 flow. Second operand 8 states and 204 transitions. [2024-06-21 16:07:04,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 532 transitions, 7460 flow [2024-06-21 16:07:13,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 532 transitions, 7240 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:13,931 INFO L231 Difference]: Finished difference. Result has 415 places, 510 transitions, 6298 flow [2024-06-21 16:07:13,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6128, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6298, PETRI_PLACES=415, PETRI_TRANSITIONS=510} [2024-06-21 16:07:13,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 16:07:13,931 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 510 transitions, 6298 flow [2024-06-21 16:07:13,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.875) internal successors, (143), 8 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:13,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:13,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:13,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:07:13,932 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:13,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:13,932 INFO L85 PathProgramCache]: Analyzing trace with hash -765229607, now seen corresponding path program 12 times [2024-06-21 16:07:13,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:13,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866693440] [2024-06-21 16:07:13,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:13,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:13,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:13,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:13,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866693440] [2024-06-21 16:07:13,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866693440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:13,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:13,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:13,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332734591] [2024-06-21 16:07:13,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:13,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:13,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:14,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:14,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:14,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:07:14,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 510 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:14,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:14,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:07:14,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:16,051 INFO L124 PetriNetUnfolderBase]: 4870/8401 cut-off events. [2024-06-21 16:07:16,051 INFO L125 PetriNetUnfolderBase]: For 1777333/1777333 co-relation queries the response was YES. [2024-06-21 16:07:16,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59363 conditions, 8401 events. 4870/8401 cut-off events. For 1777333/1777333 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 62137 event pairs, 1322 based on Foata normal form. 10/8393 useless extension candidates. Maximal degree in co-relation 59158. Up to 7412 conditions per place. [2024-06-21 16:07:16,167 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 432 selfloop transitions, 86 changer transitions 0/527 dead transitions. [2024-06-21 16:07:16,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 527 transitions, 7465 flow [2024-06-21 16:07:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:16,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 16:07:16,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6020408163265306 [2024-06-21 16:07:16,168 INFO L175 Difference]: Start difference. First operand has 415 places, 510 transitions, 6298 flow. Second operand 7 states and 177 transitions. [2024-06-21 16:07:16,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 527 transitions, 7465 flow [2024-06-21 16:07:25,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 527 transitions, 7251 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 16:07:25,169 INFO L231 Difference]: Finished difference. Result has 413 places, 512 transitions, 6349 flow [2024-06-21 16:07:25,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6084, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6349, PETRI_PLACES=413, PETRI_TRANSITIONS=512} [2024-06-21 16:07:25,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-21 16:07:25,170 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 512 transitions, 6349 flow [2024-06-21 16:07:25,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:25,170 INFO 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] [2024-06-21 16:07:25,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:07:25,170 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:25,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:25,171 INFO L85 PathProgramCache]: Analyzing trace with hash 519351671, now seen corresponding path program 13 times [2024-06-21 16:07:25,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:25,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836893270] [2024-06-21 16:07:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:25,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:25,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:25,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836893270] [2024-06-21 16:07:25,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836893270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:25,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:25,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:25,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927203388] [2024-06-21 16:07:25,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:25,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:25,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:25,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:25,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:25,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:07:25,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 512 transitions, 6349 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:25,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:25,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:07:25,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:27,289 INFO L124 PetriNetUnfolderBase]: 4906/8465 cut-off events. [2024-06-21 16:07:27,289 INFO L125 PetriNetUnfolderBase]: For 1802254/1802254 co-relation queries the response was YES. [2024-06-21 16:07:27,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60031 conditions, 8465 events. 4906/8465 cut-off events. For 1802254/1802254 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62707 event pairs, 1330 based on Foata normal form. 10/8457 useless extension candidates. Maximal degree in co-relation 59825. Up to 7468 conditions per place. [2024-06-21 16:07:27,421 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 438 selfloop transitions, 82 changer transitions 0/529 dead transitions. [2024-06-21 16:07:27,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 529 transitions, 7524 flow [2024-06-21 16:07:27,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:27,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:27,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 16:07:27,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5986394557823129 [2024-06-21 16:07:27,422 INFO L175 Difference]: Start difference. First operand has 413 places, 512 transitions, 6349 flow. Second operand 7 states and 176 transitions. [2024-06-21 16:07:27,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 529 transitions, 7524 flow [2024-06-21 16:07:34,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 529 transitions, 7298 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:07:34,225 INFO L231 Difference]: Finished difference. Result has 415 places, 514 transitions, 6384 flow [2024-06-21 16:07:34,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6123, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6384, PETRI_PLACES=415, PETRI_TRANSITIONS=514} [2024-06-21 16:07:34,225 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 372 predicate places. [2024-06-21 16:07:34,225 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 514 transitions, 6384 flow [2024-06-21 16:07:34,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:34,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:34,226 INFO 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] [2024-06-21 16:07:34,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:07:34,226 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:34,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash 519707861, now seen corresponding path program 14 times [2024-06-21 16:07:34,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:34,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519418128] [2024-06-21 16:07:34,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:34,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:34,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:34,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:34,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519418128] [2024-06-21 16:07:34,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519418128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:34,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:34,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:34,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884163732] [2024-06-21 16:07:34,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:34,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:34,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:34,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:34,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:34,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:07:34,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 514 transitions, 6384 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:34,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:34,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:07:34,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:36,219 INFO L124 PetriNetUnfolderBase]: 4876/8409 cut-off events. [2024-06-21 16:07:36,220 INFO L125 PetriNetUnfolderBase]: For 1689769/1689769 co-relation queries the response was YES. [2024-06-21 16:07:36,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57903 conditions, 8409 events. 4876/8409 cut-off events. For 1689769/1689769 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 62167 event pairs, 1300 based on Foata normal form. 10/8401 useless extension candidates. Maximal degree in co-relation 57696. Up to 7104 conditions per place. [2024-06-21 16:07:36,341 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 436 selfloop transitions, 88 changer transitions 0/533 dead transitions. [2024-06-21 16:07:36,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 533 transitions, 7502 flow [2024-06-21 16:07:36,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:36,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:36,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 16:07:36,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 16:07:36,342 INFO L175 Difference]: Start difference. First operand has 415 places, 514 transitions, 6384 flow. Second operand 7 states and 179 transitions. [2024-06-21 16:07:36,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 533 transitions, 7502 flow [2024-06-21 16:07:43,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 533 transitions, 7232 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 16:07:43,927 INFO L231 Difference]: Finished difference. Result has 417 places, 514 transitions, 6298 flow [2024-06-21 16:07:43,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6114, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6298, PETRI_PLACES=417, PETRI_TRANSITIONS=514} [2024-06-21 16:07:43,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 16:07:43,928 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 514 transitions, 6298 flow [2024-06-21 16:07:43,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:43,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:43,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:43,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:07:43,928 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:43,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:43,928 INFO L85 PathProgramCache]: Analyzing trace with hash -857442783, now seen corresponding path program 1 times [2024-06-21 16:07:43,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:43,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800825780] [2024-06-21 16:07:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:43,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:43,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:43,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:43,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800825780] [2024-06-21 16:07:43,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800825780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:43,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:43,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:43,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480912710] [2024-06-21 16:07:43,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:43,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:44,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:44,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:44,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:44,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:07:44,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 514 transitions, 6298 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:44,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:44,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:07:44,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:46,033 INFO L124 PetriNetUnfolderBase]: 4929/8504 cut-off events. [2024-06-21 16:07:46,033 INFO L125 PetriNetUnfolderBase]: For 1736462/1736462 co-relation queries the response was YES. [2024-06-21 16:07:46,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59401 conditions, 8504 events. 4929/8504 cut-off events. For 1736462/1736462 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 62931 event pairs, 1076 based on Foata normal form. 6/8504 useless extension candidates. Maximal degree in co-relation 59193. Up to 7061 conditions per place. [2024-06-21 16:07:46,155 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 83 changer transitions 0/545 dead transitions. [2024-06-21 16:07:46,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 545 transitions, 8200 flow [2024-06-21 16:07:46,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:46,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:46,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-21 16:07:46,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2024-06-21 16:07:46,156 INFO L175 Difference]: Start difference. First operand has 417 places, 514 transitions, 6298 flow. Second operand 7 states and 186 transitions. [2024-06-21 16:07:46,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 545 transitions, 8200 flow [2024-06-21 16:07:54,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 545 transitions, 7990 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 16:07:54,575 INFO L231 Difference]: Finished difference. Result has 418 places, 516 transitions, 6341 flow [2024-06-21 16:07:54,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6088, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6341, PETRI_PLACES=418, PETRI_TRANSITIONS=516} [2024-06-21 16:07:54,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-21 16:07:54,576 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 516 transitions, 6341 flow [2024-06-21 16:07:54,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:54,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:07:54,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:07:54,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:07:54,576 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:07:54,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:07:54,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1672288161, now seen corresponding path program 2 times [2024-06-21 16:07:54,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:07:54,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337966041] [2024-06-21 16:07:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:07:54,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:07:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:07:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:07:54,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:07:54,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337966041] [2024-06-21 16:07:54,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337966041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:07:54,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:07:54,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:07:54,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405929121] [2024-06-21 16:07:54,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:07:54,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:07:54,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:07:54,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:07:54,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:07:54,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:07:54,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 516 transitions, 6341 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:07:54,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:07:54,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:07:54,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:07:56,684 INFO L124 PetriNetUnfolderBase]: 4995/8634 cut-off events. [2024-06-21 16:07:56,685 INFO L125 PetriNetUnfolderBase]: For 1867151/1867151 co-relation queries the response was YES. [2024-06-21 16:07:56,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61826 conditions, 8634 events. 4995/8634 cut-off events. For 1867151/1867151 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 64158 event pairs, 1078 based on Foata normal form. 6/8634 useless extension candidates. Maximal degree in co-relation 61617. Up to 7097 conditions per place. [2024-06-21 16:07:56,833 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 90 changer transitions 0/551 dead transitions. [2024-06-21 16:07:56,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 551 transitions, 8279 flow [2024-06-21 16:07:56,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:07:56,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:07:56,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-21 16:07:56,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6564625850340136 [2024-06-21 16:07:56,834 INFO L175 Difference]: Start difference. First operand has 418 places, 516 transitions, 6341 flow. Second operand 7 states and 193 transitions. [2024-06-21 16:07:56,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 551 transitions, 8279 flow [2024-06-21 16:08:06,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 551 transitions, 8132 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:06,504 INFO L231 Difference]: Finished difference. Result has 422 places, 518 transitions, 6464 flow [2024-06-21 16:08:06,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6200, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6464, PETRI_PLACES=422, PETRI_TRANSITIONS=518} [2024-06-21 16:08:06,504 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-21 16:08:06,504 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 518 transitions, 6464 flow [2024-06-21 16:08:06,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:06,504 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:06,504 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:06,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:08:06,504 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:06,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:06,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1998663585, now seen corresponding path program 3 times [2024-06-21 16:08:06,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:06,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090571294] [2024-06-21 16:08:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:06,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:06,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:06,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:06,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:06,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090571294] [2024-06-21 16:08:06,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090571294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:06,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:06,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:06,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802359667] [2024-06-21 16:08:06,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:06,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:06,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:06,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:06,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:06,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:08:06,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 518 transitions, 6464 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:06,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:06,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:08:06,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:08,597 INFO L124 PetriNetUnfolderBase]: 4982/8603 cut-off events. [2024-06-21 16:08:08,597 INFO L125 PetriNetUnfolderBase]: For 1805740/1805740 co-relation queries the response was YES. [2024-06-21 16:08:08,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60695 conditions, 8603 events. 4982/8603 cut-off events. For 1805740/1805740 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 63971 event pairs, 1296 based on Foata normal form. 6/8596 useless extension candidates. Maximal degree in co-relation 60485. Up to 7570 conditions per place. [2024-06-21 16:08:08,723 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 466 selfloop transitions, 68 changer transitions 0/543 dead transitions. [2024-06-21 16:08:08,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 543 transitions, 7942 flow [2024-06-21 16:08:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:08,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 16:08:08,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6292517006802721 [2024-06-21 16:08:08,724 INFO L175 Difference]: Start difference. First operand has 422 places, 518 transitions, 6464 flow. Second operand 7 states and 185 transitions. [2024-06-21 16:08:08,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 543 transitions, 7942 flow [2024-06-21 16:08:17,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 543 transitions, 7781 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 16:08:17,945 INFO L231 Difference]: Finished difference. Result has 426 places, 518 transitions, 6443 flow [2024-06-21 16:08:17,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6443, PETRI_PLACES=426, PETRI_TRANSITIONS=518} [2024-06-21 16:08:17,945 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 16:08:17,945 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 518 transitions, 6443 flow [2024-06-21 16:08:17,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:17,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:17,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:17,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:08:17,946 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:17,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:17,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1999019775, now seen corresponding path program 4 times [2024-06-21 16:08:17,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:17,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335199320] [2024-06-21 16:08:17,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:17,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:18,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:18,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335199320] [2024-06-21 16:08:18,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335199320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:18,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:18,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:18,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860251808] [2024-06-21 16:08:18,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:18,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:18,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:18,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:18,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:18,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:08:18,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 518 transitions, 6443 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:18,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:18,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:08:18,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:20,002 INFO L124 PetriNetUnfolderBase]: 5010/8656 cut-off events. [2024-06-21 16:08:20,003 INFO L125 PetriNetUnfolderBase]: For 1854833/1854833 co-relation queries the response was YES. [2024-06-21 16:08:20,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60873 conditions, 8656 events. 5010/8656 cut-off events. For 1854833/1854833 co-relation queries the response was YES. Maximal size of possible extension queue 608. Compared 64425 event pairs, 1315 based on Foata normal form. 8/8658 useless extension candidates. Maximal degree in co-relation 60662. Up to 7720 conditions per place. [2024-06-21 16:08:20,264 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 466 selfloop transitions, 62 changer transitions 0/537 dead transitions. [2024-06-21 16:08:20,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 537 transitions, 7600 flow [2024-06-21 16:08:20,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:20,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:20,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:08:20,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 16:08:20,265 INFO L175 Difference]: Start difference. First operand has 426 places, 518 transitions, 6443 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:08:20,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 537 transitions, 7600 flow [2024-06-21 16:08:30,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 537 transitions, 7371 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 16:08:30,670 INFO L231 Difference]: Finished difference. Result has 426 places, 519 transitions, 6394 flow [2024-06-21 16:08:30,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6217, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6394, PETRI_PLACES=426, PETRI_TRANSITIONS=519} [2024-06-21 16:08:30,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 16:08:30,671 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 519 transitions, 6394 flow [2024-06-21 16:08:30,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:30,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:30,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:30,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:08:30,671 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:30,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:30,671 INFO L85 PathProgramCache]: Analyzing trace with hash -2042303971, now seen corresponding path program 5 times [2024-06-21 16:08:30,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:30,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585586127] [2024-06-21 16:08:30,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:30,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585586127] [2024-06-21 16:08:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585586127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:30,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:30,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:30,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2667677] [2024-06-21 16:08:30,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:30,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:30,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:30,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:30,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:08:30,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 519 transitions, 6394 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:30,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:30,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:08:30,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:32,727 INFO L124 PetriNetUnfolderBase]: 4992/8644 cut-off events. [2024-06-21 16:08:32,727 INFO L125 PetriNetUnfolderBase]: For 1762844/1762844 co-relation queries the response was YES. [2024-06-21 16:08:32,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59282 conditions, 8644 events. 4992/8644 cut-off events. For 1762844/1762844 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64423 event pairs, 1211 based on Foata normal form. 8/8646 useless extension candidates. Maximal degree in co-relation 59070. Up to 7484 conditions per place. [2024-06-21 16:08:32,856 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 461 selfloop transitions, 72 changer transitions 0/542 dead transitions. [2024-06-21 16:08:32,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 542 transitions, 7874 flow [2024-06-21 16:08:32,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:32,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:08:32,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 16:08:32,857 INFO L175 Difference]: Start difference. First operand has 426 places, 519 transitions, 6394 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:08:32,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 542 transitions, 7874 flow [2024-06-21 16:08:42,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 542 transitions, 7705 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 16:08:42,454 INFO L231 Difference]: Finished difference. Result has 428 places, 519 transitions, 6377 flow [2024-06-21 16:08:42,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6225, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6377, PETRI_PLACES=428, PETRI_TRANSITIONS=519} [2024-06-21 16:08:42,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 16:08:42,454 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 519 transitions, 6377 flow [2024-06-21 16:08:42,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:42,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:42,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:42,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:08:42,455 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:42,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:42,455 INFO L85 PathProgramCache]: Analyzing trace with hash -2039447011, now seen corresponding path program 6 times [2024-06-21 16:08:42,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:42,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273691825] [2024-06-21 16:08:42,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:42,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:42,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:42,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:42,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:42,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273691825] [2024-06-21 16:08:42,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273691825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:42,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:42,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:08:42,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358509722] [2024-06-21 16:08:42,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:42,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:08:42,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:42,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:08:42,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:08:42,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:08:42,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 519 transitions, 6377 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:42,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:42,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:08:42,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:44,490 INFO L124 PetriNetUnfolderBase]: 4974/8614 cut-off events. [2024-06-21 16:08:44,490 INFO L125 PetriNetUnfolderBase]: For 1668029/1668029 co-relation queries the response was YES. [2024-06-21 16:08:44,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57566 conditions, 8614 events. 4974/8614 cut-off events. For 1668029/1668029 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 64219 event pairs, 1301 based on Foata normal form. 8/8616 useless extension candidates. Maximal degree in co-relation 57353. Up to 7668 conditions per place. [2024-06-21 16:08:44,616 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 468 selfloop transitions, 60 changer transitions 0/537 dead transitions. [2024-06-21 16:08:44,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 537 transitions, 7489 flow [2024-06-21 16:08:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:08:44,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:08:44,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:08:44,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 16:08:44,617 INFO L175 Difference]: Start difference. First operand has 428 places, 519 transitions, 6377 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:08:44,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 537 transitions, 7489 flow [2024-06-21 16:08:52,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 537 transitions, 7271 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 16:08:52,532 INFO L231 Difference]: Finished difference. Result has 429 places, 519 transitions, 6288 flow [2024-06-21 16:08:52,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6159, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6288, PETRI_PLACES=429, PETRI_TRANSITIONS=519} [2024-06-21 16:08:52,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 16:08:52,532 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 519 transitions, 6288 flow [2024-06-21 16:08:52,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:52,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:08:52,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:08:52,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:08:52,533 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:08:52,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:08:52,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1923694697, now seen corresponding path program 1 times [2024-06-21 16:08:52,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:08:52,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232225624] [2024-06-21 16:08:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:08:52,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:08:52,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:08:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:08:52,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:08:52,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232225624] [2024-06-21 16:08:52,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232225624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:08:52,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:08:52,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:08:52,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800682569] [2024-06-21 16:08:52,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:08:52,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:08:52,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:08:52,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:08:52,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:08:52,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:08:52,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 519 transitions, 6288 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:08:52,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:08:52,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:08:52,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:08:54,616 INFO L124 PetriNetUnfolderBase]: 4995/8653 cut-off events. [2024-06-21 16:08:54,616 INFO L125 PetriNetUnfolderBase]: For 1611591/1611591 co-relation queries the response was YES. [2024-06-21 16:08:54,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57817 conditions, 8653 events. 4995/8653 cut-off events. For 1611591/1611591 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 64624 event pairs, 1304 based on Foata normal form. 1/8648 useless extension candidates. Maximal degree in co-relation 57603. Up to 7567 conditions per place. [2024-06-21 16:08:54,740 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 421 selfloop transitions, 118 changer transitions 0/548 dead transitions. [2024-06-21 16:08:54,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 548 transitions, 8222 flow [2024-06-21 16:08:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:08:54,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:08:54,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 16:08:54,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6220238095238095 [2024-06-21 16:08:54,741 INFO L175 Difference]: Start difference. First operand has 429 places, 519 transitions, 6288 flow. Second operand 8 states and 209 transitions. [2024-06-21 16:08:54,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 548 transitions, 8222 flow [2024-06-21 16:09:04,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 548 transitions, 8058 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:09:04,775 INFO L231 Difference]: Finished difference. Result has 432 places, 528 transitions, 6600 flow [2024-06-21 16:09:04,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6124, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6600, PETRI_PLACES=432, PETRI_TRANSITIONS=528} [2024-06-21 16:09:04,776 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 16:09:04,776 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 528 transitions, 6600 flow [2024-06-21 16:09:04,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:04,776 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:04,776 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:04,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:09:04,776 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:04,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:04,777 INFO L85 PathProgramCache]: Analyzing trace with hash 973564511, now seen corresponding path program 2 times [2024-06-21 16:09:04,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:04,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076406995] [2024-06-21 16:09:04,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:04,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:04,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:04,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076406995] [2024-06-21 16:09:04,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076406995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:04,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:04,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:04,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729373770] [2024-06-21 16:09:04,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:04,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:04,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:04,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:04,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:04,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:09:04,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 528 transitions, 6600 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:04,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:04,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:09:04,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:06,785 INFO L124 PetriNetUnfolderBase]: 5000/8654 cut-off events. [2024-06-21 16:09:06,786 INFO L125 PetriNetUnfolderBase]: For 1630511/1630511 co-relation queries the response was YES. [2024-06-21 16:09:06,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58349 conditions, 8654 events. 5000/8654 cut-off events. For 1630511/1630511 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64535 event pairs, 1304 based on Foata normal form. 1/8649 useless extension candidates. Maximal degree in co-relation 58132. Up to 7573 conditions per place. [2024-06-21 16:09:06,919 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 411 selfloop transitions, 127 changer transitions 0/547 dead transitions. [2024-06-21 16:09:06,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 547 transitions, 8448 flow [2024-06-21 16:09:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:09:06,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 16:09:06,920 INFO L175 Difference]: Start difference. First operand has 432 places, 528 transitions, 6600 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:09:06,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 547 transitions, 8448 flow [2024-06-21 16:09:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 547 transitions, 8274 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:17,651 INFO L231 Difference]: Finished difference. Result has 434 places, 531 transitions, 6749 flow [2024-06-21 16:09:17,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6433, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6749, PETRI_PLACES=434, PETRI_TRANSITIONS=531} [2024-06-21 16:09:17,651 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-21 16:09:17,651 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 531 transitions, 6749 flow [2024-06-21 16:09:17,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:17,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:17,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:17,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:09:17,652 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:17,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 973357121, now seen corresponding path program 3 times [2024-06-21 16:09:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:17,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528451832] [2024-06-21 16:09:17,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:17,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:17,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:17,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:17,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528451832] [2024-06-21 16:09:17,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528451832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:17,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:17,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485057026] [2024-06-21 16:09:17,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:17,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:17,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:09:17,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 531 transitions, 6749 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:17,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:17,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:09:17,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:19,641 INFO L124 PetriNetUnfolderBase]: 4997/8650 cut-off events. [2024-06-21 16:09:19,642 INFO L125 PetriNetUnfolderBase]: For 1616959/1616959 co-relation queries the response was YES. [2024-06-21 16:09:19,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58211 conditions, 8650 events. 4997/8650 cut-off events. For 1616959/1616959 co-relation queries the response was YES. Maximal size of possible extension queue 617. Compared 64583 event pairs, 1304 based on Foata normal form. 1/8645 useless extension candidates. Maximal degree in co-relation 57994. Up to 7570 conditions per place. [2024-06-21 16:09:19,773 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 419 selfloop transitions, 118 changer transitions 0/546 dead transitions. [2024-06-21 16:09:19,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 546 transitions, 8199 flow [2024-06-21 16:09:19,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 16:09:19,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-21 16:09:19,774 INFO L175 Difference]: Start difference. First operand has 434 places, 531 transitions, 6749 flow. Second operand 7 states and 182 transitions. [2024-06-21 16:09:19,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 546 transitions, 8199 flow [2024-06-21 16:09:30,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 546 transitions, 7967 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 16:09:30,769 INFO L231 Difference]: Finished difference. Result has 436 places, 531 transitions, 6769 flow [2024-06-21 16:09:30,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6519, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6769, PETRI_PLACES=436, PETRI_TRANSITIONS=531} [2024-06-21 16:09:30,770 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-21 16:09:30,770 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 531 transitions, 6769 flow [2024-06-21 16:09:30,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:30,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:30,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:30,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:09:30,770 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:30,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1998817345, now seen corresponding path program 4 times [2024-06-21 16:09:30,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:30,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368421197] [2024-06-21 16:09:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:30,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:30,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368421197] [2024-06-21 16:09:30,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368421197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:30,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:30,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:30,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289923688] [2024-06-21 16:09:30,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:30,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:30,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:30,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:09:30,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 531 transitions, 6769 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:30,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:30,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:09:30,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:32,730 INFO L124 PetriNetUnfolderBase]: 5002/8659 cut-off events. [2024-06-21 16:09:32,730 INFO L125 PetriNetUnfolderBase]: For 1617535/1617535 co-relation queries the response was YES. [2024-06-21 16:09:32,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58283 conditions, 8659 events. 5002/8659 cut-off events. For 1617535/1617535 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 64661 event pairs, 1304 based on Foata normal form. 1/8654 useless extension candidates. Maximal degree in co-relation 58066. Up to 7576 conditions per place. [2024-06-21 16:09:32,981 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 422 selfloop transitions, 121 changer transitions 0/552 dead transitions. [2024-06-21 16:09:32,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 552 transitions, 8293 flow [2024-06-21 16:09:32,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:32,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:32,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-21 16:09:32,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6258503401360545 [2024-06-21 16:09:32,982 INFO L175 Difference]: Start difference. First operand has 436 places, 531 transitions, 6769 flow. Second operand 7 states and 184 transitions. [2024-06-21 16:09:32,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 552 transitions, 8293 flow [2024-06-21 16:09:44,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 552 transitions, 7969 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 16:09:44,387 INFO L231 Difference]: Finished difference. Result has 435 places, 534 transitions, 6755 flow [2024-06-21 16:09:44,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6453, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6755, PETRI_PLACES=435, PETRI_TRANSITIONS=534} [2024-06-21 16:09:44,388 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-21 16:09:44,388 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 534 transitions, 6755 flow [2024-06-21 16:09:44,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:44,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:44,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:44,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 16:09:44,388 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:44,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1998822925, now seen corresponding path program 5 times [2024-06-21 16:09:44,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:44,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864482581] [2024-06-21 16:09:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:44,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:44,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:44,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:44,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:44,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864482581] [2024-06-21 16:09:44,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864482581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:44,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:44,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:44,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441949818] [2024-06-21 16:09:44,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:44,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:44,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:44,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:44,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:09:44,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 534 transitions, 6755 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:44,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:44,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:09:44,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:09:46,402 INFO L124 PetriNetUnfolderBase]: 5007/8668 cut-off events. [2024-06-21 16:09:46,402 INFO L125 PetriNetUnfolderBase]: For 1616870/1616870 co-relation queries the response was YES. [2024-06-21 16:09:46,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58329 conditions, 8668 events. 5007/8668 cut-off events. For 1616870/1616870 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64726 event pairs, 1304 based on Foata normal form. 1/8663 useless extension candidates. Maximal degree in co-relation 58112. Up to 7582 conditions per place. [2024-06-21 16:09:46,532 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 123 changer transitions 0/552 dead transitions. [2024-06-21 16:09:46,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 552 transitions, 8271 flow [2024-06-21 16:09:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:09:46,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:09:46,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 16:09:46,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6156462585034014 [2024-06-21 16:09:46,533 INFO L175 Difference]: Start difference. First operand has 435 places, 534 transitions, 6755 flow. Second operand 7 states and 181 transitions. [2024-06-21 16:09:46,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 552 transitions, 8271 flow [2024-06-21 16:09:58,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 552 transitions, 8013 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:09:58,029 INFO L231 Difference]: Finished difference. Result has 436 places, 537 transitions, 6809 flow [2024-06-21 16:09:58,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6505, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6809, PETRI_PLACES=436, PETRI_TRANSITIONS=537} [2024-06-21 16:09:58,030 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-21 16:09:58,030 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 537 transitions, 6809 flow [2024-06-21 16:09:58,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:58,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:09:58,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:09:58,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 16:09:58,030 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:09:58,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:09:58,030 INFO L85 PathProgramCache]: Analyzing trace with hash -2039442051, now seen corresponding path program 6 times [2024-06-21 16:09:58,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:09:58,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364350206] [2024-06-21 16:09:58,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:09:58,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:09:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:09:58,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:09:58,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:09:58,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364350206] [2024-06-21 16:09:58,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364350206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:09:58,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:09:58,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:09:58,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508874200] [2024-06-21 16:09:58,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:09:58,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:09:58,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:09:58,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:09:58,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:09:58,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:09:58,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 537 transitions, 6809 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:09:58,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:09:58,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:09:58,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:00,040 INFO L124 PetriNetUnfolderBase]: 5004/8664 cut-off events. [2024-06-21 16:10:00,040 INFO L125 PetriNetUnfolderBase]: For 1602329/1602329 co-relation queries the response was YES. [2024-06-21 16:10:00,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58109 conditions, 8664 events. 5004/8664 cut-off events. For 1602329/1602329 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 64709 event pairs, 1304 based on Foata normal form. 1/8659 useless extension candidates. Maximal degree in co-relation 57892. Up to 7579 conditions per place. [2024-06-21 16:10:00,174 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 412 selfloop transitions, 130 changer transitions 0/551 dead transitions. [2024-06-21 16:10:00,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 551 transitions, 7927 flow [2024-06-21 16:10:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:00,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 16:10:00,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.608843537414966 [2024-06-21 16:10:00,175 INFO L175 Difference]: Start difference. First operand has 436 places, 537 transitions, 6809 flow. Second operand 7 states and 179 transitions. [2024-06-21 16:10:00,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 551 transitions, 7927 flow [2024-06-21 16:10:09,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 551 transitions, 7724 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 16:10:09,956 INFO L231 Difference]: Finished difference. Result has 438 places, 537 transitions, 6876 flow [2024-06-21 16:10:09,957 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6606, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6876, PETRI_PLACES=438, PETRI_TRANSITIONS=537} [2024-06-21 16:10:09,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-21 16:10:09,957 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 537 transitions, 6876 flow [2024-06-21 16:10:09,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:09,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:09,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:09,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 16:10:09,957 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:09,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1455190217, now seen corresponding path program 7 times [2024-06-21 16:10:09,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:09,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205290013] [2024-06-21 16:10:09,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:09,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:10,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:10,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205290013] [2024-06-21 16:10:10,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205290013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:10,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:10,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:10,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985178661] [2024-06-21 16:10:10,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:10,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:10,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:10,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:10,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:10,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:10:10,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 537 transitions, 6876 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:10,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:10,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:10:10,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:12,126 INFO L124 PetriNetUnfolderBase]: 5070/8756 cut-off events. [2024-06-21 16:10:12,126 INFO L125 PetriNetUnfolderBase]: For 1798146/1798146 co-relation queries the response was YES. [2024-06-21 16:10:12,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60606 conditions, 8756 events. 5070/8756 cut-off events. For 1798146/1798146 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 65522 event pairs, 1306 based on Foata normal form. 6/8738 useless extension candidates. Maximal degree in co-relation 60389. Up to 7445 conditions per place. [2024-06-21 16:10:12,254 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 449 selfloop transitions, 112 changer transitions 0/570 dead transitions. [2024-06-21 16:10:12,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 570 transitions, 8528 flow [2024-06-21 16:10:12,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:10:12,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:10:12,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-06-21 16:10:12,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6031746031746031 [2024-06-21 16:10:12,255 INFO L175 Difference]: Start difference. First operand has 438 places, 537 transitions, 6876 flow. Second operand 9 states and 228 transitions. [2024-06-21 16:10:12,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 570 transitions, 8528 flow [2024-06-21 16:10:23,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 570 transitions, 8173 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 16:10:23,630 INFO L231 Difference]: Finished difference. Result has 439 places, 539 transitions, 6850 flow [2024-06-21 16:10:23,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6523, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6850, PETRI_PLACES=439, PETRI_TRANSITIONS=539} [2024-06-21 16:10:23,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 16:10:23,631 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 539 transitions, 6850 flow [2024-06-21 16:10:23,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:23,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:23,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:23,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 16:10:23,631 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:23,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1026275039, now seen corresponding path program 8 times [2024-06-21 16:10:23,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:23,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538078682] [2024-06-21 16:10:23,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:23,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:23,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:23,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:23,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:23,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538078682] [2024-06-21 16:10:23,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538078682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:23,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:23,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:23,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985239382] [2024-06-21 16:10:23,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:23,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:23,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:23,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:23,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:23,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:10:23,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 539 transitions, 6850 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:23,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:23,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:10:23,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:25,887 INFO L124 PetriNetUnfolderBase]: 5052/8748 cut-off events. [2024-06-21 16:10:25,887 INFO L125 PetriNetUnfolderBase]: For 1711273/1711273 co-relation queries the response was YES. [2024-06-21 16:10:26,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59082 conditions, 8748 events. 5052/8748 cut-off events. For 1711273/1711273 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 65482 event pairs, 1342 based on Foata normal form. 8/8750 useless extension candidates. Maximal degree in co-relation 58865. Up to 7692 conditions per place. [2024-06-21 16:10:26,032 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 451 selfloop transitions, 101 changer transitions 0/561 dead transitions. [2024-06-21 16:10:26,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 561 transitions, 8020 flow [2024-06-21 16:10:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:26,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:26,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 16:10:26,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5952380952380952 [2024-06-21 16:10:26,033 INFO L175 Difference]: Start difference. First operand has 439 places, 539 transitions, 6850 flow. Second operand 8 states and 200 transitions. [2024-06-21 16:10:26,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 561 transitions, 8020 flow [2024-06-21 16:10:35,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 561 transitions, 7741 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 16:10:35,704 INFO L231 Difference]: Finished difference. Result has 441 places, 539 transitions, 6778 flow [2024-06-21 16:10:35,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6571, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6778, PETRI_PLACES=441, PETRI_TRANSITIONS=539} [2024-06-21 16:10:35,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 16:10:35,704 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 539 transitions, 6778 flow [2024-06-21 16:10:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:35,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:35,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:35,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 16:10:35,704 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:35,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:35,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1159971017, now seen corresponding path program 9 times [2024-06-21 16:10:35,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:35,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097274911] [2024-06-21 16:10:35,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:35,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:35,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:35,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:35,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:35,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097274911] [2024-06-21 16:10:35,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097274911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:35,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:35,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:10:35,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933900110] [2024-06-21 16:10:35,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:35,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:10:35,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:35,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:10:35,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:10:35,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:10:35,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 539 transitions, 6778 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:35,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:35,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:10:35,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:37,810 INFO L124 PetriNetUnfolderBase]: 5039/8729 cut-off events. [2024-06-21 16:10:37,811 INFO L125 PetriNetUnfolderBase]: For 1606539/1606539 co-relation queries the response was YES. [2024-06-21 16:10:37,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57398 conditions, 8729 events. 5039/8729 cut-off events. For 1606539/1606539 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 65429 event pairs, 1329 based on Foata normal form. 6/8729 useless extension candidates. Maximal degree in co-relation 57180. Up to 7633 conditions per place. [2024-06-21 16:10:37,940 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 451 selfloop transitions, 104 changer transitions 0/564 dead transitions. [2024-06-21 16:10:37,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 564 transitions, 7968 flow [2024-06-21 16:10:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:10:37,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:10:37,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 16:10:37,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 16:10:37,941 INFO L175 Difference]: Start difference. First operand has 441 places, 539 transitions, 6778 flow. Second operand 8 states and 203 transitions. [2024-06-21 16:10:37,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 564 transitions, 7968 flow [2024-06-21 16:10:47,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 564 transitions, 7733 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:10:47,522 INFO L231 Difference]: Finished difference. Result has 442 places, 539 transitions, 6756 flow [2024-06-21 16:10:47,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6543, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6756, PETRI_PLACES=442, PETRI_TRANSITIONS=539} [2024-06-21 16:10:47,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-21 16:10:47,522 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 539 transitions, 6756 flow [2024-06-21 16:10:47,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:47,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:47,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:47,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 16:10:47,522 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:47,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:47,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1936354657, now seen corresponding path program 10 times [2024-06-21 16:10:47,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:47,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234857616] [2024-06-21 16:10:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:47,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:47,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:47,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:47,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:47,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234857616] [2024-06-21 16:10:47,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234857616] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:47,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:47,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:47,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202776847] [2024-06-21 16:10:47,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:47,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:47,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:47,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:47,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:47,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:10:47,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 539 transitions, 6756 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:47,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:47,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:10:47,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:10:49,662 INFO L124 PetriNetUnfolderBase]: 5059/8743 cut-off events. [2024-06-21 16:10:49,662 INFO L125 PetriNetUnfolderBase]: For 1626473/1626473 co-relation queries the response was YES. [2024-06-21 16:10:49,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57726 conditions, 8743 events. 5059/8743 cut-off events. For 1626473/1626473 co-relation queries the response was YES. Maximal size of possible extension queue 631. Compared 65381 event pairs, 1298 based on Foata normal form. 6/8725 useless extension candidates. Maximal degree in co-relation 57507. Up to 7559 conditions per place. [2024-06-21 16:10:49,790 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 453 selfloop transitions, 106 changer transitions 0/568 dead transitions. [2024-06-21 16:10:49,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 568 transitions, 8352 flow [2024-06-21 16:10:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:10:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:10:49,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-21 16:10:49,791 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6360544217687075 [2024-06-21 16:10:49,791 INFO L175 Difference]: Start difference. First operand has 442 places, 539 transitions, 6756 flow. Second operand 7 states and 187 transitions. [2024-06-21 16:10:49,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 568 transitions, 8352 flow [2024-06-21 16:10:59,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 568 transitions, 7992 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-21 16:10:59,041 INFO L231 Difference]: Finished difference. Result has 439 places, 540 transitions, 6659 flow [2024-06-21 16:10:59,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6396, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6659, PETRI_PLACES=439, PETRI_TRANSITIONS=540} [2024-06-21 16:10:59,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 16:10:59,041 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 540 transitions, 6659 flow [2024-06-21 16:10:59,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:59,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:10:59,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:10:59,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 16:10:59,041 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:10:59,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:10:59,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1936710847, now seen corresponding path program 11 times [2024-06-21 16:10:59,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:10:59,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401820904] [2024-06-21 16:10:59,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:10:59,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:10:59,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:10:59,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:10:59,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:10:59,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401820904] [2024-06-21 16:10:59,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401820904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:10:59,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:10:59,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:10:59,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78687581] [2024-06-21 16:10:59,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:10:59,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:10:59,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:10:59,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:10:59,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:10:59,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:10:59,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 540 transitions, 6659 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:10:59,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:10:59,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:10:59,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:01,098 INFO L124 PetriNetUnfolderBase]: 5087/8813 cut-off events. [2024-06-21 16:11:01,098 INFO L125 PetriNetUnfolderBase]: For 1677334/1677334 co-relation queries the response was YES. [2024-06-21 16:11:01,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57774 conditions, 8813 events. 5087/8813 cut-off events. For 1677334/1677334 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 66142 event pairs, 1346 based on Foata normal form. 8/8815 useless extension candidates. Maximal degree in co-relation 57557. Up to 7749 conditions per place. [2024-06-21 16:11:01,229 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 452 selfloop transitions, 101 changer transitions 0/562 dead transitions. [2024-06-21 16:11:01,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 562 transitions, 7877 flow [2024-06-21 16:11:01,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:01,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 16:11:01,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122448979591837 [2024-06-21 16:11:01,230 INFO L175 Difference]: Start difference. First operand has 439 places, 540 transitions, 6659 flow. Second operand 7 states and 180 transitions. [2024-06-21 16:11:01,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 562 transitions, 7877 flow [2024-06-21 16:11:11,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 562 transitions, 7617 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:11,251 INFO L231 Difference]: Finished difference. Result has 441 places, 541 transitions, 6656 flow [2024-06-21 16:11:11,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6403, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6656, PETRI_PLACES=441, PETRI_TRANSITIONS=541} [2024-06-21 16:11:11,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-21 16:11:11,251 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 541 transitions, 6656 flow [2024-06-21 16:11:11,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:11,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:11,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:11,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 16:11:11,252 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:11,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:11,252 INFO L85 PathProgramCache]: Analyzing trace with hash -274904901, now seen corresponding path program 12 times [2024-06-21 16:11:11,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:11,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583035493] [2024-06-21 16:11:11,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:11,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:11,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:11,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:11,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583035493] [2024-06-21 16:11:11,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583035493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:11,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:11,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:11:11,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152185852] [2024-06-21 16:11:11,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:11:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:11:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:11:11,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:11:11,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 541 transitions, 6656 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:11,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:11,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:11:11,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:13,395 INFO L124 PetriNetUnfolderBase]: 5115/8846 cut-off events. [2024-06-21 16:11:13,396 INFO L125 PetriNetUnfolderBase]: For 1696363/1696363 co-relation queries the response was YES. [2024-06-21 16:11:13,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58005 conditions, 8846 events. 5115/8846 cut-off events. For 1696363/1696363 co-relation queries the response was YES. Maximal size of possible extension queue 641. Compared 66369 event pairs, 1376 based on Foata normal form. 8/8840 useless extension candidates. Maximal degree in co-relation 57787. Up to 7793 conditions per place. [2024-06-21 16:11:13,527 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 448 selfloop transitions, 100 changer transitions 0/557 dead transitions. [2024-06-21 16:11:13,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 557 transitions, 7846 flow [2024-06-21 16:11:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:11:13,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:11:13,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 16:11:13,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884353741496599 [2024-06-21 16:11:13,527 INFO L175 Difference]: Start difference. First operand has 441 places, 541 transitions, 6656 flow. Second operand 7 states and 173 transitions. [2024-06-21 16:11:13,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 557 transitions, 7846 flow [2024-06-21 16:11:23,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 557 transitions, 7611 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:23,045 INFO L231 Difference]: Finished difference. Result has 443 places, 542 transitions, 6674 flow [2024-06-21 16:11:23,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6674, PETRI_PLACES=443, PETRI_TRANSITIONS=542} [2024-06-21 16:11:23,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-21 16:11:23,046 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 542 transitions, 6674 flow [2024-06-21 16:11:23,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:23,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:23,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:23,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 16:11:23,046 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:23,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:23,046 INFO L85 PathProgramCache]: Analyzing trace with hash -555835205, now seen corresponding path program 13 times [2024-06-21 16:11:23,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:23,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349600074] [2024-06-21 16:11:23,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:23,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:23,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:23,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:23,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349600074] [2024-06-21 16:11:23,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349600074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:23,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:23,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:23,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903500369] [2024-06-21 16:11:23,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:23,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:23,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:23,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:23,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:23,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:11:23,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 542 transitions, 6674 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:23,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:23,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:11:23,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:25,303 INFO L124 PetriNetUnfolderBase]: 5143/8881 cut-off events. [2024-06-21 16:11:25,304 INFO L125 PetriNetUnfolderBase]: For 1716698/1716698 co-relation queries the response was YES. [2024-06-21 16:11:25,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58339 conditions, 8881 events. 5143/8881 cut-off events. For 1716698/1716698 co-relation queries the response was YES. Maximal size of possible extension queue 647. Compared 66658 event pairs, 1375 based on Foata normal form. 8/8875 useless extension candidates. Maximal degree in co-relation 58120. Up to 7837 conditions per place. [2024-06-21 16:11:25,436 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 445 selfloop transitions, 105 changer transitions 0/559 dead transitions. [2024-06-21 16:11:25,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 559 transitions, 7874 flow [2024-06-21 16:11:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:11:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:11:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 16:11:25,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 16:11:25,441 INFO L175 Difference]: Start difference. First operand has 443 places, 542 transitions, 6674 flow. Second operand 8 states and 196 transitions. [2024-06-21 16:11:25,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 559 transitions, 7874 flow [2024-06-21 16:11:35,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 559 transitions, 7639 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 16:11:35,054 INFO L231 Difference]: Finished difference. Result has 446 places, 543 transitions, 6706 flow [2024-06-21 16:11:35,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6439, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6706, PETRI_PLACES=446, PETRI_TRANSITIONS=543} [2024-06-21 16:11:35,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 16:11:35,055 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 543 transitions, 6706 flow [2024-06-21 16:11:35,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:35,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:11:35,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:11:35,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 16:11:35,055 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:11:35,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:11:35,056 INFO L85 PathProgramCache]: Analyzing trace with hash 498638559, now seen corresponding path program 14 times [2024-06-21 16:11:35,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:11:35,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016574374] [2024-06-21 16:11:35,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:11:35,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:11:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:11:35,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:11:35,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:11:35,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016574374] [2024-06-21 16:11:35,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016574374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:11:35,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:11:35,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:11:35,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14608473] [2024-06-21 16:11:35,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:11:35,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:11:35,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:11:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:11:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:11:35,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 42 [2024-06-21 16:11:35,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 543 transitions, 6706 flow. Second operand has 8 states, 8 states have (on average 18.0) internal successors, (144), 8 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:11:35,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:11:35,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 42 [2024-06-21 16:11:35,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:11:37,295 INFO L124 PetriNetUnfolderBase]: 5171/8941 cut-off events. [2024-06-21 16:11:37,296 INFO L125 PetriNetUnfolderBase]: For 1735596/1735596 co-relation queries the response was YES. [2024-06-21 16:11:37,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58729 conditions, 8941 events. 5171/8941 cut-off events. For 1735596/1735596 co-relation queries the response was YES. Maximal size of possible extension queue 656. Compared 67360 event pairs, 1375 based on Foata normal form. 8/8935 useless extension candidates. Maximal degree in co-relation 58509. Up to 7773 conditions per place. [2024-06-21 16:11:37,426 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 108 changer transitions 0/565 dead transitions. [2024-06-21 16:11:37,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 565 transitions, 7944 flow [2024-06-21 16:11:37,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:11:37,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:11:37,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2024-06-21 16:11:37,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5793650793650794 [2024-06-21 16:11:37,427 INFO L175 Difference]: Start difference. First operand has 446 places, 543 transitions, 6706 flow. Second operand 9 states and 219 transitions. [2024-06-21 16:11:37,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 565 transitions, 7944 flow Killed by 15