./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_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/mutex-meet-nonrel/safe011_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/safe011_tso.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe011_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 20:03:51,410 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:03:51,492 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:03:51,497 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:03:51,498 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:03:51,529 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:03:51,531 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:03:51,531 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:03:51,532 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:03:51,535 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:03:51,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:03:51,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:03:51,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:03:51,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:03:51,539 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:03:51,539 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:03:51,539 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:03:51,539 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:03:51,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:03:51,540 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:03:51,540 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:03:51,541 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:03:51,541 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:03:51,541 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:03:51,542 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:03:51,542 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:03:51,542 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:03:51,542 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:03:51,543 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:03:51,543 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:03:51,544 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:03:51,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:03:51,545 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:51,545 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:03:51,545 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:03:51,546 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:03:51,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:03:51,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:03:51,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:03:51,546 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:03:51,547 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:03:51,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:03:51,547 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:03:51,547 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:03:51,783 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:03:51,804 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:03:51,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:03:51,808 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:03:51,809 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:03:51,810 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-21 20:03:52,929 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:03:53,160 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:03:53,161 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_tso.i [2024-06-21 20:03:53,180 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464d99bc7/ab80845c47994368af412b0cb1361b99/FLAG83c61a633 [2024-06-21 20:03:53,191 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/464d99bc7/ab80845c47994368af412b0cb1361b99 [2024-06-21 20:03:53,193 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:03:53,194 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:03:53,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/safe011_tso.yml/witness.yml [2024-06-21 20:03:53,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:03:53,326 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:03:53,327 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:53,327 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:03:53,331 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:03:53,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:53" (1/2) ... [2024-06-21 20:03:53,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef6dade and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:53, skipping insertion in model container [2024-06-21 20:03:53,333 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:03:53" (1/2) ... [2024-06-21 20:03:53,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5cbd5745 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:03:53, skipping insertion in model container [2024-06-21 20:03:53,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:53" (2/2) ... [2024-06-21 20:03:53,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef6dade and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:53, skipping insertion in model container [2024-06-21 20:03:53,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:53" (2/2) ... [2024-06-21 20:03:53,336 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:03:53,382 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:03:53,383 INFO L97 edCorrectnessWitness]: Location invariant before [L782-L782] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 20:03:53,384 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 20:03:53,384 INFO L97 edCorrectnessWitness]: Location invariant before [L779-L779] (((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || ((((0 <= __unbuffered_cnt && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (y == 0 || y == 1)) && ((x == 0 || x == 1) || x == 2)) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((z == 0 || z == 1) || z == 2)) [2024-06-21 20:03:53,384 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:03:53,384 INFO L106 edCorrectnessWitness]: ghost_update [L777-L777] multithreaded = 1; [2024-06-21 20:03:53,428 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:03:53,794 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:53,804 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:03:53,926 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:03:54,008 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:03:54,009 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54 WrapperNode [2024-06-21 20:03:54,013 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:03:54,014 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:54,014 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:03:54,014 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:03:54,020 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,050 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 65 [2024-06-21 20:03:54,050 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:03:54,051 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:03:54,051 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:03:54,051 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:03:54,062 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,062 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,064 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,077 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 20:03:54,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,083 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,087 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:03:54,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:03:54,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:03:54,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:03:54,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (1/1) ... [2024-06-21 20:03:54,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:03:54,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:03:54,114 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 20:03:54,119 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 20:03:54,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:03:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:03:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:03:54,150 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:03:54,150 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:03:54,150 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:03:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:03:54,151 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:03:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:03:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:03:54,151 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:03:54,151 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:03:54,153 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 20:03:54,259 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:03:54,261 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:03:54,424 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:03:54,425 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:03:54,519 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:03:54,519 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:03:54,519 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:54 BoogieIcfgContainer [2024-06-21 20:03:54,520 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:03:54,521 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:03:54,522 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:03:54,524 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:03:54,524 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:03:53" (1/4) ... [2024-06-21 20:03:54,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b07288b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:03:54, skipping insertion in model container [2024-06-21 20:03:54,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:03:53" (2/4) ... [2024-06-21 20:03:54,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b07288b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:03:54, skipping insertion in model container [2024-06-21 20:03:54,525 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:03:54" (3/4) ... [2024-06-21 20:03:54,525 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b07288b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:03:54, skipping insertion in model container [2024-06-21 20:03:54,526 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:03:54" (4/4) ... [2024-06-21 20:03:54,527 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_tso.i [2024-06-21 20:03:54,542 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:03:54,542 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:03:54,542 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:03:54,590 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:03:54,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:03:54,648 INFO L124 PetriNetUnfolderBase]: 0/37 cut-off events. [2024-06-21 20:03:54,649 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:54,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 37 events. 0/37 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:03:54,651 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 40 transitions, 92 flow [2024-06-21 20:03:54,653 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 31 transitions, 71 flow [2024-06-21 20:03:54,661 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:03:54,666 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;@82fb77b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:03:54,666 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:03:54,669 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:03:54,670 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:03:54,670 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:03:54,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:54,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:03:54,671 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 20:03:54,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:54,675 INFO L85 PathProgramCache]: Analyzing trace with hash 218856700, now seen corresponding path program 1 times [2024-06-21 20:03:54,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907742966] [2024-06-21 20:03:54,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:54,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:55,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:55,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907742966] [2024-06-21 20:03:55,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907742966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:55,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:55,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:03:55,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997256819] [2024-06-21 20:03:55,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:55,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:03:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:55,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:03:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:03:55,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:55,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:55,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:55,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:55,466 INFO L124 PetriNetUnfolderBase]: 776/1272 cut-off events. [2024-06-21 20:03:55,466 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 20:03:55,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2533 conditions, 1272 events. 776/1272 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 6351 event pairs, 511 based on Foata normal form. 1/1210 useless extension candidates. Maximal degree in co-relation 2521. Up to 1186 conditions per place. [2024-06-21 20:03:55,483 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 29 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-06-21 20:03:55,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 163 flow [2024-06-21 20:03:55,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:03:55,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:03:55,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-06-21 20:03:55,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-21 20:03:55,498 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 71 flow. Second operand 3 states and 81 transitions. [2024-06-21 20:03:55,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 163 flow [2024-06-21 20:03:55,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 158 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:03:55,503 INFO L231 Difference]: Finished difference. Result has 41 places, 34 transitions, 98 flow [2024-06-21 20:03:55,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=98, PETRI_PLACES=41, PETRI_TRANSITIONS=34} [2024-06-21 20:03:55,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 0 predicate places. [2024-06-21 20:03:55,508 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 34 transitions, 98 flow [2024-06-21 20:03:55,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:55,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:03:55,510 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 20:03:55,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:55,512 INFO L85 PathProgramCache]: Analyzing trace with hash -131900529, now seen corresponding path program 1 times [2024-06-21 20:03:55,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004478339] [2024-06-21 20:03:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:55,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:55,700 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 20:03:55,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:55,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004478339] [2024-06-21 20:03:55,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004478339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:55,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:55,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:03:55,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288007105] [2024-06-21 20:03:55,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:55,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:03:55,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:55,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:03:55,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:03:55,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:55,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 34 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:55,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:55,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:55,929 INFO L124 PetriNetUnfolderBase]: 777/1280 cut-off events. [2024-06-21 20:03:55,930 INFO L125 PetriNetUnfolderBase]: For 229/237 co-relation queries the response was YES. [2024-06-21 20:03:55,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2914 conditions, 1280 events. 777/1280 cut-off events. For 229/237 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6279 event pairs, 423 based on Foata normal form. 7/1255 useless extension candidates. Maximal degree in co-relation 2902. Up to 1160 conditions per place. [2024-06-21 20:03:55,938 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 38 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-06-21 20:03:55,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 57 transitions, 260 flow [2024-06-21 20:03:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:55,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:55,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-06-21 20:03:55,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6875 [2024-06-21 20:03:55,944 INFO L175 Difference]: Start difference. First operand has 41 places, 34 transitions, 98 flow. Second operand 4 states and 110 transitions. [2024-06-21 20:03:55,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 57 transitions, 260 flow [2024-06-21 20:03:55,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 57 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:03:55,947 INFO L231 Difference]: Finished difference. Result has 45 places, 42 transitions, 170 flow [2024-06-21 20:03:55,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=42} [2024-06-21 20:03:55,950 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 4 predicate places. [2024-06-21 20:03:55,951 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 42 transitions, 170 flow [2024-06-21 20:03:55,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:55,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:55,952 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:55,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:03:55,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:55,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:55,957 INFO L85 PathProgramCache]: Analyzing trace with hash 206052061, now seen corresponding path program 1 times [2024-06-21 20:03:55,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:55,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75056983] [2024-06-21 20:03:55,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:55,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:56,125 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 20:03:56,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:56,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75056983] [2024-06-21 20:03:56,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75056983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:56,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:56,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977882913] [2024-06-21 20:03:56,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:56,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:56,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:56,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:56,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 42 transitions, 170 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:56,170 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:56,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:56,342 INFO L124 PetriNetUnfolderBase]: 815/1351 cut-off events. [2024-06-21 20:03:56,343 INFO L125 PetriNetUnfolderBase]: For 979/995 co-relation queries the response was YES. [2024-06-21 20:03:56,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3620 conditions, 1351 events. 815/1351 cut-off events. For 979/995 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 6633 event pairs, 249 based on Foata normal form. 11/1352 useless extension candidates. Maximal degree in co-relation 3605. Up to 1090 conditions per place. [2024-06-21 20:03:56,366 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 55 selfloop transitions, 21 changer transitions 0/84 dead transitions. [2024-06-21 20:03:56,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 84 transitions, 468 flow [2024-06-21 20:03:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:56,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-21 20:03:56,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.72 [2024-06-21 20:03:56,369 INFO L175 Difference]: Start difference. First operand has 45 places, 42 transitions, 170 flow. Second operand 5 states and 144 transitions. [2024-06-21 20:03:56,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 84 transitions, 468 flow [2024-06-21 20:03:56,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 464 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:56,373 INFO L231 Difference]: Finished difference. Result has 52 places, 56 transitions, 312 flow [2024-06-21 20:03:56,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=312, PETRI_PLACES=52, PETRI_TRANSITIONS=56} [2024-06-21 20:03:56,374 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 11 predicate places. [2024-06-21 20:03:56,374 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 56 transitions, 312 flow [2024-06-21 20:03:56,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:56,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:56,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:03:56,375 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 20:03:56,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:56,376 INFO L85 PathProgramCache]: Analyzing trace with hash -410706608, now seen corresponding path program 1 times [2024-06-21 20:03:56,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:56,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592545892] [2024-06-21 20:03:56,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:56,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:56,507 INFO 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 20:03:56,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:56,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592545892] [2024-06-21 20:03:56,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592545892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:56,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:56,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:56,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887333303] [2024-06-21 20:03:56,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:56,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:56,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:56,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:56,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:56,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:56,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 56 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:56,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:56,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:56,808 INFO L124 PetriNetUnfolderBase]: 903/1493 cut-off events. [2024-06-21 20:03:56,808 INFO L125 PetriNetUnfolderBase]: For 2620/2653 co-relation queries the response was YES. [2024-06-21 20:03:56,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4981 conditions, 1493 events. 903/1493 cut-off events. For 2620/2653 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7509 event pairs, 161 based on Foata normal form. 38/1521 useless extension candidates. Maximal degree in co-relation 4961. Up to 1094 conditions per place. [2024-06-21 20:03:56,821 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 62 selfloop transitions, 24 changer transitions 0/94 dead transitions. [2024-06-21 20:03:56,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 94 transitions, 632 flow [2024-06-21 20:03:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:56,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-21 20:03:56,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.7041666666666667 [2024-06-21 20:03:56,823 INFO L175 Difference]: Start difference. First operand has 52 places, 56 transitions, 312 flow. Second operand 6 states and 169 transitions. [2024-06-21 20:03:56,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 94 transitions, 632 flow [2024-06-21 20:03:56,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 94 transitions, 620 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:56,829 INFO L231 Difference]: Finished difference. Result has 57 places, 58 transitions, 377 flow [2024-06-21 20:03:56,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=377, PETRI_PLACES=57, PETRI_TRANSITIONS=58} [2024-06-21 20:03:56,830 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 20:03:56,831 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 58 transitions, 377 flow [2024-06-21 20:03:56,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:56,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:56,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:03:56,832 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 20:03:56,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:56,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1224206505, now seen corresponding path program 1 times [2024-06-21 20:03:56,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:56,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341421955] [2024-06-21 20:03:56,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:56,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:56,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:56,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341421955] [2024-06-21 20:03:56,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341421955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:56,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:56,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:03:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176036355] [2024-06-21 20:03:56,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:56,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:03:56,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:03:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:03:56,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:56,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 58 transitions, 377 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:56,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:56,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:56,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,135 INFO L124 PetriNetUnfolderBase]: 898/1485 cut-off events. [2024-06-21 20:03:57,135 INFO L125 PetriNetUnfolderBase]: For 3294/3313 co-relation queries the response was YES. [2024-06-21 20:03:57,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5451 conditions, 1485 events. 898/1485 cut-off events. For 3294/3313 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7564 event pairs, 292 based on Foata normal form. 11/1495 useless extension candidates. Maximal degree in co-relation 5428. Up to 1369 conditions per place. [2024-06-21 20:03:57,149 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 57 selfloop transitions, 7 changer transitions 0/72 dead transitions. [2024-06-21 20:03:57,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 72 transitions, 564 flow [2024-06-21 20:03:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:03:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:03:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-21 20:03:57,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63125 [2024-06-21 20:03:57,151 INFO L175 Difference]: Start difference. First operand has 57 places, 58 transitions, 377 flow. Second operand 4 states and 101 transitions. [2024-06-21 20:03:57,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 72 transitions, 564 flow [2024-06-21 20:03:57,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 72 transitions, 505 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:57,161 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 377 flow [2024-06-21 20:03:57,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=377, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-06-21 20:03:57,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 16 predicate places. [2024-06-21 20:03:57,163 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 377 flow [2024-06-21 20:03:57,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:57,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:57,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:03:57,165 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 20:03:57,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:57,166 INFO L85 PathProgramCache]: Analyzing trace with hash 703353189, now seen corresponding path program 1 times [2024-06-21 20:03:57,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:57,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914599809] [2024-06-21 20:03:57,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:57,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:57,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:57,298 INFO 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 20:03:57,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:57,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914599809] [2024-06-21 20:03:57,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914599809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:57,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:57,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:57,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536256573] [2024-06-21 20:03:57,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:57,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:57,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:57,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:57,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:57,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:57,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 377 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:57,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:57,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,534 INFO L124 PetriNetUnfolderBase]: 1064/1754 cut-off events. [2024-06-21 20:03:57,535 INFO L125 PetriNetUnfolderBase]: For 3954/3954 co-relation queries the response was YES. [2024-06-21 20:03:57,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6104 conditions, 1754 events. 1064/1754 cut-off events. For 3954/3954 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9023 event pairs, 373 based on Foata normal form. 2/1755 useless extension candidates. Maximal degree in co-relation 6080. Up to 1602 conditions per place. [2024-06-21 20:03:57,549 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 68 selfloop transitions, 10 changer transitions 0/85 dead transitions. [2024-06-21 20:03:57,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 85 transitions, 630 flow [2024-06-21 20:03:57,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:57,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-21 20:03:57,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.595 [2024-06-21 20:03:57,550 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 377 flow. Second operand 5 states and 119 transitions. [2024-06-21 20:03:57,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 85 transitions, 630 flow [2024-06-21 20:03:57,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 597 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:57,557 INFO L231 Difference]: Finished difference. Result has 62 places, 70 transitions, 453 flow [2024-06-21 20:03:57,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=453, PETRI_PLACES=62, PETRI_TRANSITIONS=70} [2024-06-21 20:03:57,558 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 21 predicate places. [2024-06-21 20:03:57,558 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 70 transitions, 453 flow [2024-06-21 20:03:57,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:57,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:57,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:03:57,559 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 20:03:57,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash -563189036, now seen corresponding path program 1 times [2024-06-21 20:03:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:57,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67392141] [2024-06-21 20:03:57,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:57,663 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 20:03:57,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:57,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67392141] [2024-06-21 20:03:57,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67392141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:57,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:57,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:57,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811109277] [2024-06-21 20:03:57,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:57,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:57,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:57,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:57,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:57,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:57,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 70 transitions, 453 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:57,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:57,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:57,892 INFO L124 PetriNetUnfolderBase]: 1000/1639 cut-off events. [2024-06-21 20:03:57,892 INFO L125 PetriNetUnfolderBase]: For 5364/5413 co-relation queries the response was YES. [2024-06-21 20:03:57,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6336 conditions, 1639 events. 1000/1639 cut-off events. For 5364/5413 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8330 event pairs, 303 based on Foata normal form. 16/1637 useless extension candidates. Maximal degree in co-relation 6309. Up to 1359 conditions per place. [2024-06-21 20:03:57,924 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 57 selfloop transitions, 29 changer transitions 0/97 dead transitions. [2024-06-21 20:03:57,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 97 transitions, 759 flow [2024-06-21 20:03:57,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:57,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-21 20:03:57,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-06-21 20:03:57,926 INFO L175 Difference]: Start difference. First operand has 62 places, 70 transitions, 453 flow. Second operand 5 states and 138 transitions. [2024-06-21 20:03:57,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 97 transitions, 759 flow [2024-06-21 20:03:57,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 97 transitions, 755 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:57,933 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 550 flow [2024-06-21 20:03:57,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=550, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-06-21 20:03:57,935 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 26 predicate places. [2024-06-21 20:03:57,935 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 550 flow [2024-06-21 20:03:57,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:57,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:57,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:57,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:03:57,936 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:03:57,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:57,937 INFO L85 PathProgramCache]: Analyzing trace with hash 358598134, now seen corresponding path program 2 times [2024-06-21 20:03:57,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:57,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645245799] [2024-06-21 20:03:57,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:57,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:57,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:58,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645245799] [2024-06-21 20:03:58,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645245799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:03:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768490772] [2024-06-21 20:03:58,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:03:58,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:03:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:03:58,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:03:58,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 550 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:58,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:58,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:03:58,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:58,281 INFO L124 PetriNetUnfolderBase]: 1017/1664 cut-off events. [2024-06-21 20:03:58,281 INFO L125 PetriNetUnfolderBase]: For 6492/6537 co-relation queries the response was YES. [2024-06-21 20:03:58,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6823 conditions, 1664 events. 1017/1664 cut-off events. For 6492/6537 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 8521 event pairs, 316 based on Foata normal form. 23/1670 useless extension candidates. Maximal degree in co-relation 6793. Up to 1381 conditions per place. [2024-06-21 20:03:58,298 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 53 selfloop transitions, 32 changer transitions 0/96 dead transitions. [2024-06-21 20:03:58,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 96 transitions, 831 flow [2024-06-21 20:03:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:03:58,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:03:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-21 20:03:58,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665 [2024-06-21 20:03:58,300 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 550 flow. Second operand 5 states and 133 transitions. [2024-06-21 20:03:58,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 96 transitions, 831 flow [2024-06-21 20:03:58,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 96 transitions, 782 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:58,311 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 659 flow [2024-06-21 20:03:58,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=507, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=659, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2024-06-21 20:03:58,313 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 31 predicate places. [2024-06-21 20:03:58,314 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 659 flow [2024-06-21 20:03:58,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:58,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:58,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:58,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:03:58,314 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 20:03:58,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1712358566, now seen corresponding path program 1 times [2024-06-21 20:03:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191713053] [2024-06-21 20:03:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:58,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191713053] [2024-06-21 20:03:58,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191713053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749112698] [2024-06-21 20:03:58,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:58,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:58,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:58,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:58,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 659 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:58,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:58,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:58,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:58,696 INFO L124 PetriNetUnfolderBase]: 1087/1783 cut-off events. [2024-06-21 20:03:58,696 INFO L125 PetriNetUnfolderBase]: For 7878/7878 co-relation queries the response was YES. [2024-06-21 20:03:58,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7434 conditions, 1783 events. 1087/1783 cut-off events. For 7878/7878 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9091 event pairs, 320 based on Foata normal form. 4/1783 useless extension candidates. Maximal degree in co-relation 7401. Up to 1505 conditions per place. [2024-06-21 20:03:58,711 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 93 selfloop transitions, 22 changer transitions 0/122 dead transitions. [2024-06-21 20:03:58,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 122 transitions, 1135 flow [2024-06-21 20:03:58,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:58,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:58,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:03:58,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:03:58,713 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 659 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:03:58,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 122 transitions, 1135 flow [2024-06-21 20:03:58,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 122 transitions, 1033 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 20:03:58,730 INFO L231 Difference]: Finished difference. Result has 76 places, 93 transitions, 763 flow [2024-06-21 20:03:58,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=763, PETRI_PLACES=76, PETRI_TRANSITIONS=93} [2024-06-21 20:03:58,730 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 35 predicate places. [2024-06-21 20:03:58,731 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 93 transitions, 763 flow [2024-06-21 20:03:58,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:58,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:58,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:58,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:03:58,731 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 20:03:58,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:58,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1768122014, now seen corresponding path program 2 times [2024-06-21 20:03:58,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:58,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365352509] [2024-06-21 20:03:58,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:58,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:58,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:58,838 INFO 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 20:03:58,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:58,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365352509] [2024-06-21 20:03:58,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365352509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:58,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:58,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:58,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160903019] [2024-06-21 20:03:58,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:58,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:58,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:58,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:58,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:58,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:58,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 93 transitions, 763 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:58,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:58,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:58,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:59,099 INFO L124 PetriNetUnfolderBase]: 1098/1797 cut-off events. [2024-06-21 20:03:59,100 INFO L125 PetriNetUnfolderBase]: For 9399/9399 co-relation queries the response was YES. [2024-06-21 20:03:59,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7902 conditions, 1797 events. 1098/1797 cut-off events. For 9399/9399 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9120 event pairs, 334 based on Foata normal form. 2/1793 useless extension candidates. Maximal degree in co-relation 7866. Up to 1512 conditions per place. [2024-06-21 20:03:59,119 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 31 changer transitions 0/127 dead transitions. [2024-06-21 20:03:59,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 1216 flow [2024-06-21 20:03:59,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:59,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:59,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:03:59,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:03:59,122 INFO L175 Difference]: Start difference. First operand has 76 places, 93 transitions, 763 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:03:59,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 1216 flow [2024-06-21 20:03:59,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 127 transitions, 1176 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 20:03:59,138 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 881 flow [2024-06-21 20:03:59,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=729, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=881, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2024-06-21 20:03:59,140 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 40 predicate places. [2024-06-21 20:03:59,142 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 881 flow [2024-06-21 20:03:59,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:59,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:59,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:03:59,143 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 20:03:59,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:59,144 INFO L85 PathProgramCache]: Analyzing trace with hash -274348732, now seen corresponding path program 3 times [2024-06-21 20:03:59,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:59,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470344588] [2024-06-21 20:03:59,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:59,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:59,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:59,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:59,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470344588] [2024-06-21 20:03:59,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470344588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:59,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:59,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:59,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979785888] [2024-06-21 20:03:59,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:59,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:59,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:59,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:59,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:59,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:59,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 881 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:59,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:59,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:59,544 INFO L124 PetriNetUnfolderBase]: 1093/1790 cut-off events. [2024-06-21 20:03:59,544 INFO L125 PetriNetUnfolderBase]: For 10908/10908 co-relation queries the response was YES. [2024-06-21 20:03:59,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8129 conditions, 1790 events. 1093/1790 cut-off events. For 10908/10908 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9094 event pairs, 334 based on Foata normal form. 2/1786 useless extension candidates. Maximal degree in co-relation 8091. Up to 1509 conditions per place. [2024-06-21 20:03:59,558 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 88 selfloop transitions, 30 changer transitions 0/125 dead transitions. [2024-06-21 20:03:59,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 125 transitions, 1224 flow [2024-06-21 20:03:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:03:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:03:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-21 20:03:59,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:03:59,560 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 881 flow. Second operand 6 states and 150 transitions. [2024-06-21 20:03:59,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 125 transitions, 1224 flow [2024-06-21 20:03:59,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 125 transitions, 1208 flow, removed 8 selfloop flow, removed 0 redundant places. [2024-06-21 20:03:59,577 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 933 flow [2024-06-21 20:03:59,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=933, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-21 20:03:59,578 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 46 predicate places. [2024-06-21 20:03:59,578 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 933 flow [2024-06-21 20:03:59,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:03:59,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:03:59,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:03:59,579 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 20:03:59,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:03:59,579 INFO L85 PathProgramCache]: Analyzing trace with hash -101612764, now seen corresponding path program 1 times [2024-06-21 20:03:59,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:03:59,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222322637] [2024-06-21 20:03:59,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:03:59,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:03:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:03:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:03:59,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:03:59,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222322637] [2024-06-21 20:03:59,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222322637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:03:59,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:03:59,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:03:59,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318960180] [2024-06-21 20:03:59,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:03:59,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:03:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:03:59,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:03:59,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:03:59,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:03:59,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 933 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:03:59,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:03:59,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:03:59,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:03:59,987 INFO L124 PetriNetUnfolderBase]: 1085/1783 cut-off events. [2024-06-21 20:03:59,987 INFO L125 PetriNetUnfolderBase]: For 12094/12094 co-relation queries the response was YES. [2024-06-21 20:03:59,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8296 conditions, 1783 events. 1085/1783 cut-off events. For 12094/12094 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9052 event pairs, 298 based on Foata normal form. 4/1786 useless extension candidates. Maximal degree in co-relation 8255. Up to 1612 conditions per place. [2024-06-21 20:04:00,003 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 105 selfloop transitions, 12 changer transitions 0/124 dead transitions. [2024-06-21 20:04:00,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1229 flow [2024-06-21 20:04:00,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:00,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:00,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-21 20:04:00,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:04:00,005 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 933 flow. Second operand 6 states and 140 transitions. [2024-06-21 20:04:00,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1229 flow [2024-06-21 20:04:00,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1164 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:00,027 INFO L231 Difference]: Finished difference. Result has 89 places, 104 transitions, 915 flow [2024-06-21 20:04:00,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=89, PETRI_TRANSITIONS=104} [2024-06-21 20:04:00,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 48 predicate places. [2024-06-21 20:04:00,028 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 104 transitions, 915 flow [2024-06-21 20:04:00,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:00,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:00,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:04:00,029 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 20:04:00,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:00,030 INFO L85 PathProgramCache]: Analyzing trace with hash -58766246, now seen corresponding path program 1 times [2024-06-21 20:04:00,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:00,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451576533] [2024-06-21 20:04:00,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:00,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:00,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:00,129 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 20:04:00,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:00,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451576533] [2024-06-21 20:04:00,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451576533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:00,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:00,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:00,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010254343] [2024-06-21 20:04:00,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:00,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:00,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:00,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:00,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:00,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:00,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 104 transitions, 915 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:00,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:00,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:00,404 INFO L124 PetriNetUnfolderBase]: 1112/1832 cut-off events. [2024-06-21 20:04:00,404 INFO L125 PetriNetUnfolderBase]: For 13574/13574 co-relation queries the response was YES. [2024-06-21 20:04:00,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1832 events. 1112/1832 cut-off events. For 13574/13574 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9395 event pairs, 316 based on Foata normal form. 2/1830 useless extension candidates. Maximal degree in co-relation 8599. Up to 1526 conditions per place. [2024-06-21 20:04:00,421 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 98 selfloop transitions, 33 changer transitions 0/138 dead transitions. [2024-06-21 20:04:00,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 138 transitions, 1402 flow [2024-06-21 20:04:00,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:00,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:04:00,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:04:00,423 INFO L175 Difference]: Start difference. First operand has 89 places, 104 transitions, 915 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:04:00,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 138 transitions, 1402 flow [2024-06-21 20:04:00,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 138 transitions, 1373 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:00,450 INFO L231 Difference]: Finished difference. Result has 92 places, 111 transitions, 1035 flow [2024-06-21 20:04:00,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1035, PETRI_PLACES=92, PETRI_TRANSITIONS=111} [2024-06-21 20:04:00,451 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 51 predicate places. [2024-06-21 20:04:00,451 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 111 transitions, 1035 flow [2024-06-21 20:04:00,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:00,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:00,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:04:00,452 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 20:04:00,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:00,453 INFO L85 PathProgramCache]: Analyzing trace with hash -58771826, now seen corresponding path program 2 times [2024-06-21 20:04:00,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:00,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436508420] [2024-06-21 20:04:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:00,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:00,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:00,553 INFO 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 20:04:00,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:00,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436508420] [2024-06-21 20:04:00,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436508420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:00,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:00,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:00,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319475383] [2024-06-21 20:04:00,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:00,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:00,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:00,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:00,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:00,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 111 transitions, 1035 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:00,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:00,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:00,808 INFO L124 PetriNetUnfolderBase]: 1107/1825 cut-off events. [2024-06-21 20:04:00,808 INFO L125 PetriNetUnfolderBase]: For 15130/15130 co-relation queries the response was YES. [2024-06-21 20:04:00,816 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8877 conditions, 1825 events. 1107/1825 cut-off events. For 15130/15130 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9339 event pairs, 316 based on Foata normal form. 2/1823 useless extension candidates. Maximal degree in co-relation 8833. Up to 1521 conditions per place. [2024-06-21 20:04:00,826 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 96 selfloop transitions, 37 changer transitions 0/140 dead transitions. [2024-06-21 20:04:00,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 140 transitions, 1439 flow [2024-06-21 20:04:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:00,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-21 20:04:00,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6458333333333334 [2024-06-21 20:04:00,828 INFO L175 Difference]: Start difference. First operand has 92 places, 111 transitions, 1035 flow. Second operand 6 states and 155 transitions. [2024-06-21 20:04:00,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 140 transitions, 1439 flow [2024-06-21 20:04:00,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 140 transitions, 1397 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:00,854 INFO L231 Difference]: Finished difference. Result has 97 places, 113 transitions, 1116 flow [2024-06-21 20:04:00,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=994, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1116, PETRI_PLACES=97, PETRI_TRANSITIONS=113} [2024-06-21 20:04:00,855 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 56 predicate places. [2024-06-21 20:04:00,855 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 113 transitions, 1116 flow [2024-06-21 20:04:00,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:00,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:00,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:04:00,856 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 20:04:00,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:00,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1022792798, now seen corresponding path program 3 times [2024-06-21 20:04:00,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:00,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508291993] [2024-06-21 20:04:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:00,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:00,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:00,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508291993] [2024-06-21 20:04:00,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508291993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:00,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:00,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:00,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631079703] [2024-06-21 20:04:00,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:00,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:00,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:00,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:00,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:00,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:00,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 113 transitions, 1116 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:00,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:00,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:00,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:01,242 INFO L124 PetriNetUnfolderBase]: 1102/1821 cut-off events. [2024-06-21 20:04:01,242 INFO L125 PetriNetUnfolderBase]: For 17664/17667 co-relation queries the response was YES. [2024-06-21 20:04:01,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9067 conditions, 1821 events. 1102/1821 cut-off events. For 17664/17667 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9338 event pairs, 342 based on Foata normal form. 4/1817 useless extension candidates. Maximal degree in co-relation 9021. Up to 1516 conditions per place. [2024-06-21 20:04:01,260 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 93 selfloop transitions, 33 changer transitions 0/133 dead transitions. [2024-06-21 20:04:01,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 133 transitions, 1427 flow [2024-06-21 20:04:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:04:01,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:04:01,262 INFO L175 Difference]: Start difference. First operand has 97 places, 113 transitions, 1116 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:04:01,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 133 transitions, 1427 flow [2024-06-21 20:04:01,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 133 transitions, 1377 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:01,290 INFO L231 Difference]: Finished difference. Result has 100 places, 114 transitions, 1151 flow [2024-06-21 20:04:01,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1067, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1151, PETRI_PLACES=100, PETRI_TRANSITIONS=114} [2024-06-21 20:04:01,291 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 59 predicate places. [2024-06-21 20:04:01,291 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 114 transitions, 1151 flow [2024-06-21 20:04:01,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:01,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:01,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:04:01,292 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 20:04:01,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:01,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2118063951, now seen corresponding path program 1 times [2024-06-21 20:04:01,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:01,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921824025] [2024-06-21 20:04:01,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:01,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:01,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:01,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921824025] [2024-06-21 20:04:01,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921824025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:01,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:01,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:04:01,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805551132] [2024-06-21 20:04:01,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:01,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:04:01,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:01,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:04:01,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:04:01,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:01,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 114 transitions, 1151 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:01,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:01,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:01,673 INFO L124 PetriNetUnfolderBase]: 1078/1764 cut-off events. [2024-06-21 20:04:01,674 INFO L125 PetriNetUnfolderBase]: For 17966/17973 co-relation queries the response was YES. [2024-06-21 20:04:01,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8979 conditions, 1764 events. 1078/1764 cut-off events. For 17966/17973 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 8883 event pairs, 314 based on Foata normal form. 8/1770 useless extension candidates. Maximal degree in co-relation 8932. Up to 1603 conditions per place. [2024-06-21 20:04:01,690 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 101 selfloop transitions, 14 changer transitions 0/122 dead transitions. [2024-06-21 20:04:01,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 122 transitions, 1401 flow [2024-06-21 20:04:01,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:04:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:04:01,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-21 20:04:01,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:04:01,692 INFO L175 Difference]: Start difference. First operand has 100 places, 114 transitions, 1151 flow. Second operand 4 states and 98 transitions. [2024-06-21 20:04:01,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 122 transitions, 1401 flow [2024-06-21 20:04:01,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 122 transitions, 1350 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:01,721 INFO L231 Difference]: Finished difference. Result has 101 places, 114 transitions, 1136 flow [2024-06-21 20:04:01,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1136, PETRI_PLACES=101, PETRI_TRANSITIONS=114} [2024-06-21 20:04:01,722 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 60 predicate places. [2024-06-21 20:04:01,722 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 114 transitions, 1136 flow [2024-06-21 20:04:01,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:01,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:01,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:04:01,723 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:01,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:01,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1228387191, now seen corresponding path program 1 times [2024-06-21 20:04:01,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:01,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693934382] [2024-06-21 20:04:01,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:01,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:01,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:01,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693934382] [2024-06-21 20:04:01,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693934382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:01,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:01,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:01,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220438765] [2024-06-21 20:04:01,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:01,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:01,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:01,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:01,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:01,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:04:01,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 114 transitions, 1136 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:01,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:01,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:04:01,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:02,190 INFO L124 PetriNetUnfolderBase]: 1201/1965 cut-off events. [2024-06-21 20:04:02,190 INFO L125 PetriNetUnfolderBase]: For 26241/26249 co-relation queries the response was YES. [2024-06-21 20:04:02,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10169 conditions, 1965 events. 1201/1965 cut-off events. For 26241/26249 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10342 event pairs, 207 based on Foata normal form. 20/1930 useless extension candidates. Maximal degree in co-relation 10120. Up to 1241 conditions per place. [2024-06-21 20:04:02,209 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 89 selfloop transitions, 43 changer transitions 0/154 dead transitions. [2024-06-21 20:04:02,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 154 transitions, 1664 flow [2024-06-21 20:04:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:02,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 167 transitions. [2024-06-21 20:04:02,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6958333333333333 [2024-06-21 20:04:02,211 INFO L175 Difference]: Start difference. First operand has 101 places, 114 transitions, 1136 flow. Second operand 6 states and 167 transitions. [2024-06-21 20:04:02,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 154 transitions, 1664 flow [2024-06-21 20:04:02,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 154 transitions, 1628 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:02,256 INFO L231 Difference]: Finished difference. Result has 105 places, 120 transitions, 1282 flow [2024-06-21 20:04:02,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1282, PETRI_PLACES=105, PETRI_TRANSITIONS=120} [2024-06-21 20:04:02,256 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 64 predicate places. [2024-06-21 20:04:02,257 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 120 transitions, 1282 flow [2024-06-21 20:04:02,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:02,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:02,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:02,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:04:02,257 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:02,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash -794688431, now seen corresponding path program 2 times [2024-06-21 20:04:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:02,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518500156] [2024-06-21 20:04:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:02,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:02,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:02,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:02,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518500156] [2024-06-21 20:04:02,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518500156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:02,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:02,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:02,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694153505] [2024-06-21 20:04:02,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:02,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:02,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:02,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:02,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:02,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-06-21 20:04:02,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 120 transitions, 1282 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:02,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:02,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-06-21 20:04:02,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:02,691 INFO L124 PetriNetUnfolderBase]: 1212/1981 cut-off events. [2024-06-21 20:04:02,691 INFO L125 PetriNetUnfolderBase]: For 29894/29909 co-relation queries the response was YES. [2024-06-21 20:04:02,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10954 conditions, 1981 events. 1212/1981 cut-off events. For 29894/29909 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 10468 event pairs, 310 based on Foata normal form. 18/1943 useless extension candidates. Maximal degree in co-relation 10904. Up to 1586 conditions per place. [2024-06-21 20:04:02,711 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 84 selfloop transitions, 43 changer transitions 0/149 dead transitions. [2024-06-21 20:04:02,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 149 transitions, 1667 flow [2024-06-21 20:04:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:02,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-06-21 20:04:02,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.675 [2024-06-21 20:04:02,713 INFO L175 Difference]: Start difference. First operand has 105 places, 120 transitions, 1282 flow. Second operand 6 states and 162 transitions. [2024-06-21 20:04:02,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 149 transitions, 1667 flow [2024-06-21 20:04:02,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 1599 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:02,765 INFO L231 Difference]: Finished difference. Result has 109 places, 122 transitions, 1337 flow [2024-06-21 20:04:02,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1337, PETRI_PLACES=109, PETRI_TRANSITIONS=122} [2024-06-21 20:04:02,765 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 68 predicate places. [2024-06-21 20:04:02,765 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 122 transitions, 1337 flow [2024-06-21 20:04:02,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:02,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:02,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:02,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:04:02,766 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 20:04:02,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:02,767 INFO L85 PathProgramCache]: Analyzing trace with hash -679212563, now seen corresponding path program 1 times [2024-06-21 20:04:02,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:02,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593952197] [2024-06-21 20:04:02,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:02,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:02,881 INFO 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 20:04:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593952197] [2024-06-21 20:04:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593952197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:02,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:02,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:02,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221883435] [2024-06-21 20:04:02,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:02,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:02,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:02,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:02,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:02,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:02,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 122 transitions, 1337 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:02,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:02,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:02,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:03,246 INFO L124 PetriNetUnfolderBase]: 1339/2181 cut-off events. [2024-06-21 20:04:03,246 INFO L125 PetriNetUnfolderBase]: For 31140/31140 co-relation queries the response was YES. [2024-06-21 20:04:03,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11846 conditions, 2181 events. 1339/2181 cut-off events. For 31140/31140 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11499 event pairs, 348 based on Foata normal form. 20/2197 useless extension candidates. Maximal degree in co-relation 11794. Up to 1783 conditions per place. [2024-06-21 20:04:03,270 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 110 selfloop transitions, 37 changer transitions 0/154 dead transitions. [2024-06-21 20:04:03,270 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 154 transitions, 1735 flow [2024-06-21 20:04:03,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:03,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:03,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:04:03,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:04:03,272 INFO L175 Difference]: Start difference. First operand has 109 places, 122 transitions, 1337 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:04:03,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 154 transitions, 1735 flow [2024-06-21 20:04:03,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 154 transitions, 1631 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:03,325 INFO L231 Difference]: Finished difference. Result has 112 places, 124 transitions, 1341 flow [2024-06-21 20:04:03,325 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1341, PETRI_PLACES=112, PETRI_TRANSITIONS=124} [2024-06-21 20:04:03,326 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 71 predicate places. [2024-06-21 20:04:03,326 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 124 transitions, 1341 flow [2024-06-21 20:04:03,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:03,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:03,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:03,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:04:03,327 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 20:04:03,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:03,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1413911875, now seen corresponding path program 2 times [2024-06-21 20:04:03,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:03,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370357083] [2024-06-21 20:04:03,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:03,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:03,441 INFO 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 20:04:03,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:03,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370357083] [2024-06-21 20:04:03,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370357083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:03,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164390943] [2024-06-21 20:04:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:03,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:03,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:03,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:03,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 124 transitions, 1341 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:03,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:03,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:03,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:03,808 INFO L124 PetriNetUnfolderBase]: 1356/2198 cut-off events. [2024-06-21 20:04:03,809 INFO L125 PetriNetUnfolderBase]: For 31718/31718 co-relation queries the response was YES. [2024-06-21 20:04:03,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12152 conditions, 2198 events. 1356/2198 cut-off events. For 31718/31718 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11547 event pairs, 374 based on Foata normal form. 4/2195 useless extension candidates. Maximal degree in co-relation 12099. Up to 1902 conditions per place. [2024-06-21 20:04:03,834 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 40 changer transitions 0/150 dead transitions. [2024-06-21 20:04:03,834 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 150 transitions, 1713 flow [2024-06-21 20:04:03,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:04:03,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:04:03,837 INFO L175 Difference]: Start difference. First operand has 112 places, 124 transitions, 1341 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:04:03,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 150 transitions, 1713 flow [2024-06-21 20:04:03,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 150 transitions, 1627 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:03,898 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1372 flow [2024-06-21 20:04:03,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1372, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-21 20:04:03,899 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 73 predicate places. [2024-06-21 20:04:03,899 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1372 flow [2024-06-21 20:04:03,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:03,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:03,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:03,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:04:03,900 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 20:04:03,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash -813502781, now seen corresponding path program 3 times [2024-06-21 20:04:03,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:03,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17053073] [2024-06-21 20:04:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:03,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:04,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:04,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:04,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17053073] [2024-06-21 20:04:04,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17053073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:04,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:04,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:04,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441684666] [2024-06-21 20:04:04,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:04,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:04,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:04,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:04,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:04,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:04,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:04,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:04,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:04,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:04,421 INFO L124 PetriNetUnfolderBase]: 1373/2225 cut-off events. [2024-06-21 20:04:04,421 INFO L125 PetriNetUnfolderBase]: For 34729/34729 co-relation queries the response was YES. [2024-06-21 20:04:04,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12492 conditions, 2225 events. 1373/2225 cut-off events. For 34729/34729 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11747 event pairs, 379 based on Foata normal form. 4/2222 useless extension candidates. Maximal degree in co-relation 12438. Up to 1929 conditions per place. [2024-06-21 20:04:04,448 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 104 selfloop transitions, 41 changer transitions 0/152 dead transitions. [2024-06-21 20:04:04,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 152 transitions, 1752 flow [2024-06-21 20:04:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:04,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:04,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:04:04,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:04:04,450 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1372 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:04:04,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 152 transitions, 1752 flow [2024-06-21 20:04:04,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 152 transitions, 1653 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:04,525 INFO L231 Difference]: Finished difference. Result has 116 places, 128 transitions, 1396 flow [2024-06-21 20:04:04,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1273, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1396, PETRI_PLACES=116, PETRI_TRANSITIONS=128} [2024-06-21 20:04:04,526 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 75 predicate places. [2024-06-21 20:04:04,526 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 128 transitions, 1396 flow [2024-06-21 20:04:04,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:04,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:04,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:04,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:04:04,527 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 20:04:04,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash -813263771, now seen corresponding path program 4 times [2024-06-21 20:04:04,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:04,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745434012] [2024-06-21 20:04:04,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:04,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:04,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:04,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:04,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:04,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745434012] [2024-06-21 20:04:04,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745434012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:04,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:04,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:04,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245228930] [2024-06-21 20:04:04,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:04,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:04,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:04,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:04,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:04,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:04,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 128 transitions, 1396 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:04,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:04,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:04,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:05,067 INFO L124 PetriNetUnfolderBase]: 1365/2221 cut-off events. [2024-06-21 20:04:05,067 INFO L125 PetriNetUnfolderBase]: For 36545/36545 co-relation queries the response was YES. [2024-06-21 20:04:05,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12527 conditions, 2221 events. 1365/2221 cut-off events. For 36545/36545 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11715 event pairs, 336 based on Foata normal form. 4/2218 useless extension candidates. Maximal degree in co-relation 12472. Up to 1748 conditions per place. [2024-06-21 20:04:05,096 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 103 selfloop transitions, 48 changer transitions 0/158 dead transitions. [2024-06-21 20:04:05,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 158 transitions, 1808 flow [2024-06-21 20:04:05,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:05,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:05,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:04:05,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 20:04:05,099 INFO L175 Difference]: Start difference. First operand has 116 places, 128 transitions, 1396 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:04:05,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 158 transitions, 1808 flow [2024-06-21 20:04:05,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 158 transitions, 1703 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:05,163 INFO L231 Difference]: Finished difference. Result has 118 places, 130 transitions, 1432 flow [2024-06-21 20:04:05,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1291, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1432, PETRI_PLACES=118, PETRI_TRANSITIONS=130} [2024-06-21 20:04:05,164 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 77 predicate places. [2024-06-21 20:04:05,164 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 130 transitions, 1432 flow [2024-06-21 20:04:05,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 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 20:04:05,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:05,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:05,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:04:05,165 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 20:04:05,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:05,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1021554729, now seen corresponding path program 1 times [2024-06-21 20:04:05,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:05,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593010754] [2024-06-21 20:04:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:05,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:05,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:05,270 INFO 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 20:04:05,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:05,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593010754] [2024-06-21 20:04:05,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593010754] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:05,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:05,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:05,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848066872] [2024-06-21 20:04:05,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:05,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:05,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:05,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:05,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:05,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:05,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 130 transitions, 1432 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:05,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:05,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:05,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:05,672 INFO L124 PetriNetUnfolderBase]: 1467/2417 cut-off events. [2024-06-21 20:04:05,673 INFO L125 PetriNetUnfolderBase]: For 44271/44271 co-relation queries the response was YES. [2024-06-21 20:04:05,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13609 conditions, 2417 events. 1467/2417 cut-off events. For 44271/44271 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13207 event pairs, 291 based on Foata normal form. 12/2425 useless extension candidates. Maximal degree in co-relation 13553. Up to 1607 conditions per place. [2024-06-21 20:04:05,698 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 128 selfloop transitions, 38 changer transitions 0/173 dead transitions. [2024-06-21 20:04:05,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 173 transitions, 2025 flow [2024-06-21 20:04:05,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:05,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:05,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-21 20:04:05,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6321428571428571 [2024-06-21 20:04:05,701 INFO L175 Difference]: Start difference. First operand has 118 places, 130 transitions, 1432 flow. Second operand 7 states and 177 transitions. [2024-06-21 20:04:05,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 173 transitions, 2025 flow [2024-06-21 20:04:05,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 173 transitions, 1902 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:05,777 INFO L231 Difference]: Finished difference. Result has 122 places, 135 transitions, 1476 flow [2024-06-21 20:04:05,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1309, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1476, PETRI_PLACES=122, PETRI_TRANSITIONS=135} [2024-06-21 20:04:05,777 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 81 predicate places. [2024-06-21 20:04:05,777 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 135 transitions, 1476 flow [2024-06-21 20:04:05,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:05,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:05,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:05,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:04:05,778 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 20:04:05,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:05,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1047771175, now seen corresponding path program 2 times [2024-06-21 20:04:05,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:05,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962208736] [2024-06-21 20:04:05,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:05,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:05,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:05,899 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 20:04:05,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:05,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962208736] [2024-06-21 20:04:05,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962208736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:05,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:05,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:05,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783903208] [2024-06-21 20:04:05,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:05,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:05,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:05,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:05,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:05,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:05,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 135 transitions, 1476 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:05,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:05,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:05,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:06,297 INFO L124 PetriNetUnfolderBase]: 1508/2506 cut-off events. [2024-06-21 20:04:06,297 INFO L125 PetriNetUnfolderBase]: For 47633/47633 co-relation queries the response was YES. [2024-06-21 20:04:06,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14065 conditions, 2506 events. 1508/2506 cut-off events. For 47633/47633 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 13954 event pairs, 379 based on Foata normal form. 12/2514 useless extension candidates. Maximal degree in co-relation 14006. Up to 1983 conditions per place. [2024-06-21 20:04:06,327 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 125 selfloop transitions, 39 changer transitions 0/171 dead transitions. [2024-06-21 20:04:06,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 171 transitions, 1939 flow [2024-06-21 20:04:06,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:06,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:06,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:04:06,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:04:06,329 INFO L175 Difference]: Start difference. First operand has 122 places, 135 transitions, 1476 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:04:06,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 171 transitions, 1939 flow [2024-06-21 20:04:06,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 171 transitions, 1880 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:06,422 INFO L231 Difference]: Finished difference. Result has 128 places, 138 transitions, 1555 flow [2024-06-21 20:04:06,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1555, PETRI_PLACES=128, PETRI_TRANSITIONS=138} [2024-06-21 20:04:06,423 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 87 predicate places. [2024-06-21 20:04:06,423 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 138 transitions, 1555 flow [2024-06-21 20:04:06,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:06,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:06,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:06,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:04:06,424 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 20:04:06,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:06,424 INFO L85 PathProgramCache]: Analyzing trace with hash -645284497, now seen corresponding path program 3 times [2024-06-21 20:04:06,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:06,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641840748] [2024-06-21 20:04:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:06,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:06,521 INFO 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 20:04:06,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:06,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641840748] [2024-06-21 20:04:06,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641840748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:06,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:06,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772747108] [2024-06-21 20:04:06,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:06,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:06,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:06,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:06,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 138 transitions, 1555 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:06,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:06,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:07,007 INFO L124 PetriNetUnfolderBase]: 1610/2690 cut-off events. [2024-06-21 20:04:07,007 INFO L125 PetriNetUnfolderBase]: For 55768/55768 co-relation queries the response was YES. [2024-06-21 20:04:07,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15377 conditions, 2690 events. 1610/2690 cut-off events. For 55768/55768 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 15321 event pairs, 344 based on Foata normal form. 12/2698 useless extension candidates. Maximal degree in co-relation 15315. Up to 2089 conditions per place. [2024-06-21 20:04:07,040 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 131 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-21 20:04:07,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 179 transitions, 2144 flow [2024-06-21 20:04:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:07,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:07,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 20:04:07,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6464285714285715 [2024-06-21 20:04:07,042 INFO L175 Difference]: Start difference. First operand has 128 places, 138 transitions, 1555 flow. Second operand 7 states and 181 transitions. [2024-06-21 20:04:07,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 179 transitions, 2144 flow [2024-06-21 20:04:07,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 179 transitions, 2085 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:07,163 INFO L231 Difference]: Finished difference. Result has 133 places, 141 transitions, 1645 flow [2024-06-21 20:04:07,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1645, PETRI_PLACES=133, PETRI_TRANSITIONS=141} [2024-06-21 20:04:07,163 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 92 predicate places. [2024-06-21 20:04:07,163 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 141 transitions, 1645 flow [2024-06-21 20:04:07,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:07,164 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:07,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:07,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:04:07,165 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 20:04:07,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:07,165 INFO L85 PathProgramCache]: Analyzing trace with hash -645136627, now seen corresponding path program 4 times [2024-06-21 20:04:07,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:07,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432227935] [2024-06-21 20:04:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:07,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:07,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:07,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432227935] [2024-06-21 20:04:07,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432227935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:07,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:07,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:07,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569637887] [2024-06-21 20:04:07,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:07,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:07,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 141 transitions, 1645 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:07,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:07,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:07,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:07,753 INFO L124 PetriNetUnfolderBase]: 1668/2788 cut-off events. [2024-06-21 20:04:07,753 INFO L125 PetriNetUnfolderBase]: For 61857/61857 co-relation queries the response was YES. [2024-06-21 20:04:07,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16179 conditions, 2788 events. 1668/2788 cut-off events. For 61857/61857 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 16143 event pairs, 449 based on Foata normal form. 16/2800 useless extension candidates. Maximal degree in co-relation 16114. Up to 2360 conditions per place. [2024-06-21 20:04:07,781 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 129 selfloop transitions, 39 changer transitions 0/175 dead transitions. [2024-06-21 20:04:07,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 175 transitions, 2093 flow [2024-06-21 20:04:07,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:07,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:07,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:04:07,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:04:07,782 INFO L175 Difference]: Start difference. First operand has 133 places, 141 transitions, 1645 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:04:07,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 175 transitions, 2093 flow [2024-06-21 20:04:07,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 175 transitions, 2030 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:07,914 INFO L231 Difference]: Finished difference. Result has 137 places, 142 transitions, 1691 flow [2024-06-21 20:04:07,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1584, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1691, PETRI_PLACES=137, PETRI_TRANSITIONS=142} [2024-06-21 20:04:07,915 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 96 predicate places. [2024-06-21 20:04:07,915 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 142 transitions, 1691 flow [2024-06-21 20:04:07,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:07,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:07,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:07,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:04:07,916 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 20:04:07,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:07,917 INFO L85 PathProgramCache]: Analyzing trace with hash -639774247, now seen corresponding path program 5 times [2024-06-21 20:04:07,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:07,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957168829] [2024-06-21 20:04:07,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:07,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:07,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:08,015 INFO 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 20:04:08,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:08,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957168829] [2024-06-21 20:04:08,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957168829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:08,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:08,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:08,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744636278] [2024-06-21 20:04:08,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:08,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:08,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:08,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:08,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:08,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:08,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 142 transitions, 1691 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:08,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:08,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:08,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:08,525 INFO L124 PetriNetUnfolderBase]: 1726/2886 cut-off events. [2024-06-21 20:04:08,525 INFO L125 PetriNetUnfolderBase]: For 66237/66237 co-relation queries the response was YES. [2024-06-21 20:04:08,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 2886 events. 1726/2886 cut-off events. For 66237/66237 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 16915 event pairs, 459 based on Foata normal form. 16/2898 useless extension candidates. Maximal degree in co-relation 16746. Up to 2458 conditions per place. [2024-06-21 20:04:08,554 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 36 changer transitions 0/173 dead transitions. [2024-06-21 20:04:08,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 173 transitions, 2127 flow [2024-06-21 20:04:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:08,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:04:08,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:04:08,557 INFO L175 Difference]: Start difference. First operand has 137 places, 142 transitions, 1691 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:04:08,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 173 transitions, 2127 flow [2024-06-21 20:04:08,681 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 173 transitions, 2058 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:08,684 INFO L231 Difference]: Finished difference. Result has 140 places, 143 transitions, 1725 flow [2024-06-21 20:04:08,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1725, PETRI_PLACES=140, PETRI_TRANSITIONS=143} [2024-06-21 20:04:08,685 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 99 predicate places. [2024-06-21 20:04:08,685 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 143 transitions, 1725 flow [2024-06-21 20:04:08,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:08,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:08,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:08,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:04:08,686 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 20:04:08,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:08,686 INFO L85 PathProgramCache]: Analyzing trace with hash 419247411, now seen corresponding path program 1 times [2024-06-21 20:04:08,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:08,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477705540] [2024-06-21 20:04:08,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:08,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:08,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:08,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:08,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477705540] [2024-06-21 20:04:08,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477705540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:08,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:08,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:08,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736659027] [2024-06-21 20:04:08,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:08,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:08,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:08,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:08,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:08,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:08,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 143 transitions, 1725 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:08,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:08,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:08,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:09,301 INFO L124 PetriNetUnfolderBase]: 1767/2967 cut-off events. [2024-06-21 20:04:09,301 INFO L125 PetriNetUnfolderBase]: For 69766/69766 co-relation queries the response was YES. [2024-06-21 20:04:09,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17261 conditions, 2967 events. 1767/2967 cut-off events. For 69766/69766 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 17546 event pairs, 455 based on Foata normal form. 12/2975 useless extension candidates. Maximal degree in co-relation 17193. Up to 2230 conditions per place. [2024-06-21 20:04:09,322 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 130 selfloop transitions, 40 changer transitions 0/177 dead transitions. [2024-06-21 20:04:09,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 177 transitions, 2178 flow [2024-06-21 20:04:09,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:04:09,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:04:09,324 INFO L175 Difference]: Start difference. First operand has 140 places, 143 transitions, 1725 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:04:09,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 177 transitions, 2178 flow [2024-06-21 20:04:09,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 177 transitions, 2097 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:09,456 INFO L231 Difference]: Finished difference. Result has 142 places, 144 transitions, 1754 flow [2024-06-21 20:04:09,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1644, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1754, PETRI_PLACES=142, PETRI_TRANSITIONS=144} [2024-06-21 20:04:09,462 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 101 predicate places. [2024-06-21 20:04:09,462 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 144 transitions, 1754 flow [2024-06-21 20:04:09,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:09,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:09,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:04:09,463 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 20:04:09,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:09,464 INFO L85 PathProgramCache]: Analyzing trace with hash -643618595, now seen corresponding path program 6 times [2024-06-21 20:04:09,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:09,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474801510] [2024-06-21 20:04:09,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:09,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:09,562 INFO 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 20:04:09,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:09,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474801510] [2024-06-21 20:04:09,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474801510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:09,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:09,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:09,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176765277] [2024-06-21 20:04:09,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:09,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:09,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:09,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:09,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:09,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:09,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 144 transitions, 1754 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:09,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:09,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:09,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:09,962 INFO L124 PetriNetUnfolderBase]: 1739/2926 cut-off events. [2024-06-21 20:04:09,962 INFO L125 PetriNetUnfolderBase]: For 70283/70286 co-relation queries the response was YES. [2024-06-21 20:04:09,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16776 conditions, 2926 events. 1739/2926 cut-off events. For 70283/70286 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17299 event pairs, 484 based on Foata normal form. 18/2936 useless extension candidates. Maximal degree in co-relation 16707. Up to 2485 conditions per place. [2024-06-21 20:04:09,982 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 131 selfloop transitions, 34 changer transitions 0/172 dead transitions. [2024-06-21 20:04:09,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 172 transitions, 2182 flow [2024-06-21 20:04:09,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:09,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:09,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:04:09,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:09,984 INFO L175 Difference]: Start difference. First operand has 142 places, 144 transitions, 1754 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:04:09,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 172 transitions, 2182 flow [2024-06-21 20:04:10,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 172 transitions, 2071 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:10,109 INFO L231 Difference]: Finished difference. Result has 144 places, 145 transitions, 1744 flow [2024-06-21 20:04:10,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=144, PETRI_TRANSITIONS=145} [2024-06-21 20:04:10,110 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 20:04:10,110 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 145 transitions, 1744 flow [2024-06-21 20:04:10,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:10,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:10,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:10,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:04:10,110 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 20:04:10,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:10,111 INFO L85 PathProgramCache]: Analyzing trace with hash -643403393, now seen corresponding path program 2 times [2024-06-21 20:04:10,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:10,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143208676] [2024-06-21 20:04:10,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:10,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:10,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:10,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:10,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143208676] [2024-06-21 20:04:10,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143208676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:10,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:10,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:10,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579797260] [2024-06-21 20:04:10,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:10,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:10,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:10,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:10,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:10,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:10,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 145 transitions, 1744 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:10,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:10,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:10,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:10,608 INFO L124 PetriNetUnfolderBase]: 1719/2894 cut-off events. [2024-06-21 20:04:10,608 INFO L125 PetriNetUnfolderBase]: For 66163/66166 co-relation queries the response was YES. [2024-06-21 20:04:10,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16191 conditions, 2894 events. 1719/2894 cut-off events. For 66163/66166 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17045 event pairs, 455 based on Foata normal form. 14/2900 useless extension candidates. Maximal degree in co-relation 16121. Up to 2366 conditions per place. [2024-06-21 20:04:10,628 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 132 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-21 20:04:10,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 175 transitions, 2164 flow [2024-06-21 20:04:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:10,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:10,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:04:10,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:04:10,629 INFO L175 Difference]: Start difference. First operand has 144 places, 145 transitions, 1744 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:04:10,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 175 transitions, 2164 flow [2024-06-21 20:04:10,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 175 transitions, 2091 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:10,737 INFO L231 Difference]: Finished difference. Result has 146 places, 145 transitions, 1749 flow [2024-06-21 20:04:10,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1671, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1749, PETRI_PLACES=146, PETRI_TRANSITIONS=145} [2024-06-21 20:04:10,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 105 predicate places. [2024-06-21 20:04:10,738 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 145 transitions, 1749 flow [2024-06-21 20:04:10,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:10,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:10,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:10,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:04:10,738 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 20:04:10,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:10,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1976433955, now seen corresponding path program 3 times [2024-06-21 20:04:10,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:10,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586890274] [2024-06-21 20:04:10,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:10,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:10,838 INFO 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 20:04:10,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:10,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586890274] [2024-06-21 20:04:10,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586890274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:10,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:10,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990282019] [2024-06-21 20:04:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:10,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:10,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:10,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:10,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:10,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 145 transitions, 1749 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:10,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:10,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:10,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:11,217 INFO L124 PetriNetUnfolderBase]: 1699/2862 cut-off events. [2024-06-21 20:04:11,217 INFO L125 PetriNetUnfolderBase]: For 64399/64402 co-relation queries the response was YES. [2024-06-21 20:04:11,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15828 conditions, 2862 events. 1699/2862 cut-off events. For 64399/64402 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 16761 event pairs, 400 based on Foata normal form. 14/2868 useless extension candidates. Maximal degree in co-relation 15757. Up to 1833 conditions per place. [2024-06-21 20:04:11,238 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 124 selfloop transitions, 44 changer transitions 0/175 dead transitions. [2024-06-21 20:04:11,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 175 transitions, 2111 flow [2024-06-21 20:04:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:04:11,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:04:11,239 INFO L175 Difference]: Start difference. First operand has 146 places, 145 transitions, 1749 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:04:11,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 175 transitions, 2111 flow [2024-06-21 20:04:11,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 175 transitions, 1950 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:11,334 INFO L231 Difference]: Finished difference. Result has 144 places, 144 transitions, 1620 flow [2024-06-21 20:04:11,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1620, PETRI_PLACES=144, PETRI_TRANSITIONS=144} [2024-06-21 20:04:11,334 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 103 predicate places. [2024-06-21 20:04:11,334 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 144 transitions, 1620 flow [2024-06-21 20:04:11,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 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 20:04:11,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:11,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:11,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:04:11,335 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:11,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:11,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1179730858, now seen corresponding path program 1 times [2024-06-21 20:04:11,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:11,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413234214] [2024-06-21 20:04:11,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:11,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:11,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:11,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413234214] [2024-06-21 20:04:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413234214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:11,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:11,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350584338] [2024-06-21 20:04:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:11,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:11,457 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:11,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 144 transitions, 1620 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:11,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:11,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:11,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:11,785 INFO L124 PetriNetUnfolderBase]: 1704/2882 cut-off events. [2024-06-21 20:04:11,785 INFO L125 PetriNetUnfolderBase]: For 61433/61433 co-relation queries the response was YES. [2024-06-21 20:04:11,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15674 conditions, 2882 events. 1704/2882 cut-off events. For 61433/61433 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17043 event pairs, 422 based on Foata normal form. 1/2882 useless extension candidates. Maximal degree in co-relation 15604. Up to 2644 conditions per place. [2024-06-21 20:04:11,802 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 140 selfloop transitions, 20 changer transitions 0/167 dead transitions. [2024-06-21 20:04:11,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 167 transitions, 2108 flow [2024-06-21 20:04:11,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:11,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-21 20:04:11,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-06-21 20:04:11,803 INFO L175 Difference]: Start difference. First operand has 144 places, 144 transitions, 1620 flow. Second operand 6 states and 139 transitions. [2024-06-21 20:04:11,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 167 transitions, 2108 flow [2024-06-21 20:04:11,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 167 transitions, 1994 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:11,882 INFO L231 Difference]: Finished difference. Result has 145 places, 150 transitions, 1622 flow [2024-06-21 20:04:11,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1506, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1622, PETRI_PLACES=145, PETRI_TRANSITIONS=150} [2024-06-21 20:04:11,883 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 104 predicate places. [2024-06-21 20:04:11,883 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 150 transitions, 1622 flow [2024-06-21 20:04:11,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:11,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:11,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:11,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:04:11,884 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 20:04:11,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:11,884 INFO L85 PathProgramCache]: Analyzing trace with hash 348397974, now seen corresponding path program 2 times [2024-06-21 20:04:11,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:11,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533036359] [2024-06-21 20:04:11,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:11,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:11,968 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 20:04:11,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:11,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533036359] [2024-06-21 20:04:11,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533036359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:11,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:11,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:11,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591306237] [2024-06-21 20:04:11,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:11,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:11,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:11,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:11,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:12,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:12,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 150 transitions, 1622 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:12,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:12,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:12,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:12,383 INFO L124 PetriNetUnfolderBase]: 1714/2898 cut-off events. [2024-06-21 20:04:12,383 INFO L125 PetriNetUnfolderBase]: For 64714/64714 co-relation queries the response was YES. [2024-06-21 20:04:12,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15628 conditions, 2898 events. 1714/2898 cut-off events. For 64714/64714 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17192 event pairs, 422 based on Foata normal form. 1/2898 useless extension candidates. Maximal degree in co-relation 15557. Up to 2670 conditions per place. [2024-06-21 20:04:12,413 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 144 selfloop transitions, 18 changer transitions 0/169 dead transitions. [2024-06-21 20:04:12,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 169 transitions, 2051 flow [2024-06-21 20:04:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:12,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:12,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 20:04:12,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-06-21 20:04:12,414 INFO L175 Difference]: Start difference. First operand has 145 places, 150 transitions, 1622 flow. Second operand 6 states and 134 transitions. [2024-06-21 20:04:12,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 169 transitions, 2051 flow [2024-06-21 20:04:12,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 169 transitions, 1997 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:12,546 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1689 flow [2024-06-21 20:04:12,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1689, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2024-06-21 20:04:12,546 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 108 predicate places. [2024-06-21 20:04:12,547 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1689 flow [2024-06-21 20:04:12,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:12,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:12,547 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:12,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:04:12,547 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 20:04:12,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:12,548 INFO L85 PathProgramCache]: Analyzing trace with hash 177695730, now seen corresponding path program 1 times [2024-06-21 20:04:12,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:12,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753332464] [2024-06-21 20:04:12,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:12,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:12,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:12,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:12,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:12,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753332464] [2024-06-21 20:04:12,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753332464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:12,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:12,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:12,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861336878] [2024-06-21 20:04:12,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:12,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:12,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:12,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:12,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:12,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:12,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1689 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:12,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:12,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:12,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:13,041 INFO L124 PetriNetUnfolderBase]: 1749/2944 cut-off events. [2024-06-21 20:04:13,041 INFO L125 PetriNetUnfolderBase]: For 69943/69943 co-relation queries the response was YES. [2024-06-21 20:04:13,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16042 conditions, 2944 events. 1749/2944 cut-off events. For 69943/69943 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 17389 event pairs, 445 based on Foata normal form. 3/2942 useless extension candidates. Maximal degree in co-relation 15969. Up to 2530 conditions per place. [2024-06-21 20:04:13,070 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 122 selfloop transitions, 55 changer transitions 0/184 dead transitions. [2024-06-21 20:04:13,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 184 transitions, 2340 flow [2024-06-21 20:04:13,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:13,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:13,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-21 20:04:13,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-21 20:04:13,072 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1689 flow. Second operand 6 states and 148 transitions. [2024-06-21 20:04:13,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 184 transitions, 2340 flow [2024-06-21 20:04:13,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 184 transitions, 2286 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:13,210 INFO L231 Difference]: Finished difference. Result has 153 places, 169 transitions, 1904 flow [2024-06-21 20:04:13,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1904, PETRI_PLACES=153, PETRI_TRANSITIONS=169} [2024-06-21 20:04:13,211 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-06-21 20:04:13,211 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 169 transitions, 1904 flow [2024-06-21 20:04:13,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:13,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:13,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:04:13,212 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 20:04:13,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:13,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1348304558, now seen corresponding path program 2 times [2024-06-21 20:04:13,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:13,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897115447] [2024-06-21 20:04:13,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:13,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:13,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:13,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:13,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897115447] [2024-06-21 20:04:13,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897115447] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:13,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:13,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:13,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147281082] [2024-06-21 20:04:13,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:13,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:13,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:13,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:13,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:13,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:13,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 169 transitions, 1904 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:13,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:13,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:13,694 INFO L124 PetriNetUnfolderBase]: 1766/2980 cut-off events. [2024-06-21 20:04:13,694 INFO L125 PetriNetUnfolderBase]: For 75196/75199 co-relation queries the response was YES. [2024-06-21 20:04:13,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16545 conditions, 2980 events. 1766/2980 cut-off events. For 75196/75199 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17678 event pairs, 468 based on Foata normal form. 5/2977 useless extension candidates. Maximal degree in co-relation 16470. Up to 2547 conditions per place. [2024-06-21 20:04:13,726 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 126 selfloop transitions, 51 changer transitions 0/184 dead transitions. [2024-06-21 20:04:13,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 184 transitions, 2407 flow [2024-06-21 20:04:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:13,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:13,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 20:04:13,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-21 20:04:13,728 INFO L175 Difference]: Start difference. First operand has 153 places, 169 transitions, 1904 flow. Second operand 5 states and 122 transitions. [2024-06-21 20:04:13,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 184 transitions, 2407 flow [2024-06-21 20:04:13,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 184 transitions, 2326 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:13,905 INFO L231 Difference]: Finished difference. Result has 156 places, 174 transitions, 1993 flow [2024-06-21 20:04:13,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1827, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1993, PETRI_PLACES=156, PETRI_TRANSITIONS=174} [2024-06-21 20:04:13,906 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 115 predicate places. [2024-06-21 20:04:13,906 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 174 transitions, 1993 flow [2024-06-21 20:04:13,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:13,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:13,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:13,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:04:13,906 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 20:04:13,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:13,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1084313344, now seen corresponding path program 3 times [2024-06-21 20:04:13,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:13,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821556563] [2024-06-21 20:04:13,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:13,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821556563] [2024-06-21 20:04:14,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821556563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:14,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:14,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:14,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803228843] [2024-06-21 20:04:14,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:14,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:14,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:14,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:14,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:14,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:14,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 174 transitions, 1993 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:14,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:14,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:14,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:14,384 INFO L124 PetriNetUnfolderBase]: 1743/2935 cut-off events. [2024-06-21 20:04:14,384 INFO L125 PetriNetUnfolderBase]: For 75880/75880 co-relation queries the response was YES. [2024-06-21 20:04:14,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16339 conditions, 2935 events. 1743/2935 cut-off events. For 75880/75880 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17310 event pairs, 443 based on Foata normal form. 3/2933 useless extension candidates. Maximal degree in co-relation 16263. Up to 2517 conditions per place. [2024-06-21 20:04:14,407 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 120 selfloop transitions, 60 changer transitions 0/187 dead transitions. [2024-06-21 20:04:14,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 187 transitions, 2455 flow [2024-06-21 20:04:14,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:14,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:14,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-21 20:04:14,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-21 20:04:14,409 INFO L175 Difference]: Start difference. First operand has 156 places, 174 transitions, 1993 flow. Second operand 5 states and 126 transitions. [2024-06-21 20:04:14,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 187 transitions, 2455 flow [2024-06-21 20:04:14,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 187 transitions, 2341 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:14,551 INFO L231 Difference]: Finished difference. Result has 158 places, 174 transitions, 2017 flow [2024-06-21 20:04:14,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1879, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2017, PETRI_PLACES=158, PETRI_TRANSITIONS=174} [2024-06-21 20:04:14,552 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 117 predicate places. [2024-06-21 20:04:14,552 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 174 transitions, 2017 flow [2024-06-21 20:04:14,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:14,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:14,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:14,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:04:14,553 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 20:04:14,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1084313158, now seen corresponding path program 3 times [2024-06-21 20:04:14,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:14,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825945094] [2024-06-21 20:04:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:14,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:14,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:14,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:14,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825945094] [2024-06-21 20:04:14,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825945094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:14,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:14,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:14,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024959135] [2024-06-21 20:04:14,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:14,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:14,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:14,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:14,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:14,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:14,693 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 174 transitions, 2017 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:14,693 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:14,693 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:14,693 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:15,080 INFO L124 PetriNetUnfolderBase]: 1740/2936 cut-off events. [2024-06-21 20:04:15,080 INFO L125 PetriNetUnfolderBase]: For 76778/76778 co-relation queries the response was YES. [2024-06-21 20:04:15,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16461 conditions, 2936 events. 1740/2936 cut-off events. For 76778/76778 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 17370 event pairs, 416 based on Foata normal form. 1/2936 useless extension candidates. Maximal degree in co-relation 16385. Up to 2691 conditions per place. [2024-06-21 20:04:15,101 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 159 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-21 20:04:15,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 189 transitions, 2419 flow [2024-06-21 20:04:15,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:15,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 20:04:15,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:15,102 INFO L175 Difference]: Start difference. First operand has 158 places, 174 transitions, 2017 flow. Second operand 5 states and 120 transitions. [2024-06-21 20:04:15,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 189 transitions, 2419 flow [2024-06-21 20:04:15,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 189 transitions, 2250 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:15,236 INFO L231 Difference]: Finished difference. Result has 159 places, 174 transitions, 1908 flow [2024-06-21 20:04:15,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1848, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1908, PETRI_PLACES=159, PETRI_TRANSITIONS=174} [2024-06-21 20:04:15,236 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 118 predicate places. [2024-06-21 20:04:15,237 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 174 transitions, 1908 flow [2024-06-21 20:04:15,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:15,237 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:15,237 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:15,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:04:15,237 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 20:04:15,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1348313486, now seen corresponding path program 1 times [2024-06-21 20:04:15,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:15,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686276799] [2024-06-21 20:04:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:15,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:15,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:15,335 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 20:04:15,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:15,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686276799] [2024-06-21 20:04:15,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686276799] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:15,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:15,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:15,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412555429] [2024-06-21 20:04:15,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:15,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:15,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:15,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:15,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:15,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 174 transitions, 1908 flow. Second operand has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:15,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:15,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:15,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:15,784 INFO L124 PetriNetUnfolderBase]: 1743/2937 cut-off events. [2024-06-21 20:04:15,784 INFO L125 PetriNetUnfolderBase]: For 78044/78049 co-relation queries the response was YES. [2024-06-21 20:04:15,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16240 conditions, 2937 events. 1743/2937 cut-off events. For 78044/78049 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 17288 event pairs, 423 based on Foata normal form. 8/2943 useless extension candidates. Maximal degree in co-relation 16163. Up to 2685 conditions per place. [2024-06-21 20:04:15,813 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 163 selfloop transitions, 17 changer transitions 0/187 dead transitions. [2024-06-21 20:04:15,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 187 transitions, 2342 flow [2024-06-21 20:04:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-21 20:04:15,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58 [2024-06-21 20:04:15,815 INFO L175 Difference]: Start difference. First operand has 159 places, 174 transitions, 1908 flow. Second operand 5 states and 116 transitions. [2024-06-21 20:04:15,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 187 transitions, 2342 flow [2024-06-21 20:04:15,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 187 transitions, 2294 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:16,000 INFO L231 Difference]: Finished difference. Result has 160 places, 177 transitions, 1956 flow [2024-06-21 20:04:16,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1860, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1956, PETRI_PLACES=160, PETRI_TRANSITIONS=177} [2024-06-21 20:04:16,001 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 119 predicate places. [2024-06-21 20:04:16,001 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 177 transitions, 1956 flow [2024-06-21 20:04:16,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.166666666666668) internal successors, (97), 6 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:16,002 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 20:04:16,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:04:16,002 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 20:04:16,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:16,002 INFO L85 PathProgramCache]: Analyzing trace with hash 305494220, now seen corresponding path program 1 times [2024-06-21 20:04:16,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:16,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215932110] [2024-06-21 20:04:16,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:16,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:16,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:16,083 INFO 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 20:04:16,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:16,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215932110] [2024-06-21 20:04:16,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215932110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:16,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:16,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:16,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262603205] [2024-06-21 20:04:16,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:16,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:16,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:16,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:16,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:16,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:16,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 177 transitions, 1956 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:16,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:16,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:16,506 INFO L124 PetriNetUnfolderBase]: 1763/2965 cut-off events. [2024-06-21 20:04:16,507 INFO L125 PetriNetUnfolderBase]: For 77062/77070 co-relation queries the response was YES. [2024-06-21 20:04:16,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16551 conditions, 2965 events. 1763/2965 cut-off events. For 77062/77070 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 17525 event pairs, 464 based on Foata normal form. 8/2967 useless extension candidates. Maximal degree in co-relation 16473. Up to 2534 conditions per place. [2024-06-21 20:04:16,538 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 136 selfloop transitions, 59 changer transitions 0/202 dead transitions. [2024-06-21 20:04:16,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 202 transitions, 2547 flow [2024-06-21 20:04:16,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:04:16,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:04:16,540 INFO L175 Difference]: Start difference. First operand has 160 places, 177 transitions, 1956 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:04:16,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 202 transitions, 2547 flow [2024-06-21 20:04:16,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 202 transitions, 2473 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:16,656 INFO L231 Difference]: Finished difference. Result has 164 places, 185 transitions, 2101 flow [2024-06-21 20:04:16,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1882, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2101, PETRI_PLACES=164, PETRI_TRANSITIONS=185} [2024-06-21 20:04:16,657 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 123 predicate places. [2024-06-21 20:04:16,657 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 185 transitions, 2101 flow [2024-06-21 20:04:16,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:16,657 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 20:04:16,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:04:16,658 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 20:04:16,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:16,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1316619980, now seen corresponding path program 2 times [2024-06-21 20:04:16,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:16,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562667789] [2024-06-21 20:04:16,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:16,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:16,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:16,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:16,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562667789] [2024-06-21 20:04:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562667789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:16,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:16,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550612183] [2024-06-21 20:04:16,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:16,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:16,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:16,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:16,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:16,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 185 transitions, 2101 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:16,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:16,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:16,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:17,186 INFO L124 PetriNetUnfolderBase]: 1773/2983 cut-off events. [2024-06-21 20:04:17,186 INFO L125 PetriNetUnfolderBase]: For 81365/81373 co-relation queries the response was YES. [2024-06-21 20:04:17,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16861 conditions, 2983 events. 1773/2983 cut-off events. For 81365/81373 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 17709 event pairs, 464 based on Foata normal form. 8/2985 useless extension candidates. Maximal degree in co-relation 16781. Up to 2544 conditions per place. [2024-06-21 20:04:17,205 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 135 selfloop transitions, 63 changer transitions 0/205 dead transitions. [2024-06-21 20:04:17,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 205 transitions, 2664 flow [2024-06-21 20:04:17,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:17,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:17,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-21 20:04:17,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-21 20:04:17,206 INFO L175 Difference]: Start difference. First operand has 164 places, 185 transitions, 2101 flow. Second operand 5 states and 127 transitions. [2024-06-21 20:04:17,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 205 transitions, 2664 flow [2024-06-21 20:04:17,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 205 transitions, 2511 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:17,368 INFO L231 Difference]: Finished difference. Result has 166 places, 189 transitions, 2139 flow [2024-06-21 20:04:17,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1960, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2139, PETRI_PLACES=166, PETRI_TRANSITIONS=189} [2024-06-21 20:04:17,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 125 predicate places. [2024-06-21 20:04:17,369 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 189 transitions, 2139 flow [2024-06-21 20:04:17,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:17,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:17,369 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 20:04:17,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:04:17,369 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:17,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:17,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1316631140, now seen corresponding path program 3 times [2024-06-21 20:04:17,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:17,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861830360] [2024-06-21 20:04:17,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:17,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:17,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:17,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:17,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861830360] [2024-06-21 20:04:17,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861830360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:17,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:17,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:17,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711997829] [2024-06-21 20:04:17,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:17,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:17,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:17,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:17,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:17,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 189 transitions, 2139 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:17,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:17,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:17,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:17,765 INFO L124 PetriNetUnfolderBase]: 1765/2969 cut-off events. [2024-06-21 20:04:17,765 INFO L125 PetriNetUnfolderBase]: For 83537/83540 co-relation queries the response was YES. [2024-06-21 20:04:17,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16817 conditions, 2969 events. 1765/2969 cut-off events. For 83537/83540 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 17520 event pairs, 470 based on Foata normal form. 4/2965 useless extension candidates. Maximal degree in co-relation 16737. Up to 2536 conditions per place. [2024-06-21 20:04:17,789 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 129 selfloop transitions, 62 changer transitions 0/198 dead transitions. [2024-06-21 20:04:17,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 198 transitions, 2543 flow [2024-06-21 20:04:17,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:17,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:17,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-21 20:04:17,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:17,790 INFO L175 Difference]: Start difference. First operand has 166 places, 189 transitions, 2139 flow. Second operand 5 states and 120 transitions. [2024-06-21 20:04:17,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 198 transitions, 2543 flow [2024-06-21 20:04:17,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 198 transitions, 2432 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:17,938 INFO L231 Difference]: Finished difference. Result has 168 places, 189 transitions, 2162 flow [2024-06-21 20:04:17,939 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2028, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2162, PETRI_PLACES=168, PETRI_TRANSITIONS=189} [2024-06-21 20:04:17,939 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 127 predicate places. [2024-06-21 20:04:17,939 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 189 transitions, 2162 flow [2024-06-21 20:04:17,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:17,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:17,939 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 20:04:17,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:04:17,940 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:17,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1238645294, now seen corresponding path program 1 times [2024-06-21 20:04:17,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:17,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917056042] [2024-06-21 20:04:17,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:17,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:17,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:18,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:18,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917056042] [2024-06-21 20:04:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917056042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:18,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:18,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518028696] [2024-06-21 20:04:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:18,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:18,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:18,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 189 transitions, 2162 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:18,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:18,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:18,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:18,450 INFO L124 PetriNetUnfolderBase]: 1824/3049 cut-off events. [2024-06-21 20:04:18,450 INFO L125 PetriNetUnfolderBase]: For 88144/88144 co-relation queries the response was YES. [2024-06-21 20:04:18,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17495 conditions, 3049 events. 1824/3049 cut-off events. For 88144/88144 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 18079 event pairs, 458 based on Foata normal form. 3/3045 useless extension candidates. Maximal degree in co-relation 17415. Up to 2398 conditions per place. [2024-06-21 20:04:18,470 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 96 changer transitions 0/229 dead transitions. [2024-06-21 20:04:18,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 229 transitions, 3122 flow [2024-06-21 20:04:18,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:18,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:04:18,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:04:18,472 INFO L175 Difference]: Start difference. First operand has 168 places, 189 transitions, 2162 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:04:18,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 229 transitions, 3122 flow [2024-06-21 20:04:18,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 229 transitions, 2944 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:18,634 INFO L231 Difference]: Finished difference. Result has 171 places, 206 transitions, 2399 flow [2024-06-21 20:04:18,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1984, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2399, PETRI_PLACES=171, PETRI_TRANSITIONS=206} [2024-06-21 20:04:18,634 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 130 predicate places. [2024-06-21 20:04:18,634 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 206 transitions, 2399 flow [2024-06-21 20:04:18,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:18,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:18,635 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 20:04:18,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:04:18,635 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:18,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:18,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1213595534, now seen corresponding path program 2 times [2024-06-21 20:04:18,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:18,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599961584] [2024-06-21 20:04:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:18,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:18,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:18,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:18,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599961584] [2024-06-21 20:04:18,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599961584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:18,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:18,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:18,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943843202] [2024-06-21 20:04:18,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:18,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:18,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:18,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:18,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:18,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 206 transitions, 2399 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:18,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:18,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:18,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:19,182 INFO L124 PetriNetUnfolderBase]: 1883/3155 cut-off events. [2024-06-21 20:04:19,182 INFO L125 PetriNetUnfolderBase]: For 97848/97848 co-relation queries the response was YES. [2024-06-21 20:04:19,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19002 conditions, 3155 events. 1883/3155 cut-off events. For 97848/97848 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18821 event pairs, 448 based on Foata normal form. 3/3153 useless extension candidates. Maximal degree in co-relation 18920. Up to 2655 conditions per place. [2024-06-21 20:04:19,232 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 147 selfloop transitions, 78 changer transitions 0/232 dead transitions. [2024-06-21 20:04:19,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 232 transitions, 3123 flow [2024-06-21 20:04:19,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:19,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:04:19,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:19,234 INFO L175 Difference]: Start difference. First operand has 171 places, 206 transitions, 2399 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:04:19,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 232 transitions, 3123 flow [2024-06-21 20:04:19,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 232 transitions, 2929 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:19,428 INFO L231 Difference]: Finished difference. Result has 177 places, 216 transitions, 2538 flow [2024-06-21 20:04:19,428 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2225, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2538, PETRI_PLACES=177, PETRI_TRANSITIONS=216} [2024-06-21 20:04:19,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 136 predicate places. [2024-06-21 20:04:19,429 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 216 transitions, 2538 flow [2024-06-21 20:04:19,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:19,429 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:19,429 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 20:04:19,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:04:19,430 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:19,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:19,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1213601114, now seen corresponding path program 3 times [2024-06-21 20:04:19,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:19,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175904757] [2024-06-21 20:04:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:19,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:19,519 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 20:04:19,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175904757] [2024-06-21 20:04:19,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175904757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:19,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:19,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:19,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21074449] [2024-06-21 20:04:19,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:19,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:19,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:19,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:19,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 216 transitions, 2538 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:19,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:19,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:19,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:19,979 INFO L124 PetriNetUnfolderBase]: 1882/3154 cut-off events. [2024-06-21 20:04:19,980 INFO L125 PetriNetUnfolderBase]: For 100356/100356 co-relation queries the response was YES. [2024-06-21 20:04:19,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19050 conditions, 3154 events. 1882/3154 cut-off events. For 100356/100356 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 18836 event pairs, 448 based on Foata normal form. 3/3152 useless extension candidates. Maximal degree in co-relation 18965. Up to 2656 conditions per place. [2024-06-21 20:04:20,003 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 144 selfloop transitions, 87 changer transitions 0/238 dead transitions. [2024-06-21 20:04:20,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 238 transitions, 3194 flow [2024-06-21 20:04:20,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:20,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:20,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-21 20:04:20,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-06-21 20:04:20,009 INFO L175 Difference]: Start difference. First operand has 177 places, 216 transitions, 2538 flow. Second operand 9 states and 208 transitions. [2024-06-21 20:04:20,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 238 transitions, 3194 flow [2024-06-21 20:04:20,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 238 transitions, 3041 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:20,230 INFO L231 Difference]: Finished difference. Result has 183 places, 221 transitions, 2643 flow [2024-06-21 20:04:20,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2393, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2643, PETRI_PLACES=183, PETRI_TRANSITIONS=221} [2024-06-21 20:04:20,231 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 142 predicate places. [2024-06-21 20:04:20,231 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 221 transitions, 2643 flow [2024-06-21 20:04:20,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:20,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:20,232 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 20:04:20,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:04:20,232 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:20,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:20,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1152230882, now seen corresponding path program 4 times [2024-06-21 20:04:20,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:20,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434727004] [2024-06-21 20:04:20,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:20,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:20,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:20,336 INFO 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 20:04:20,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:20,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434727004] [2024-06-21 20:04:20,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434727004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:20,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:20,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:20,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394638136] [2024-06-21 20:04:20,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:20,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:20,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:20,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:20,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:20,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:20,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 221 transitions, 2643 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:20,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:20,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:20,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:20,795 INFO L124 PetriNetUnfolderBase]: 1937/3256 cut-off events. [2024-06-21 20:04:20,795 INFO L125 PetriNetUnfolderBase]: For 110112/110115 co-relation queries the response was YES. [2024-06-21 20:04:20,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20024 conditions, 3256 events. 1937/3256 cut-off events. For 110112/110115 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19653 event pairs, 469 based on Foata normal form. 5/3253 useless extension candidates. Maximal degree in co-relation 19937. Up to 2553 conditions per place. [2024-06-21 20:04:20,822 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 115 changer transitions 0/255 dead transitions. [2024-06-21 20:04:20,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 255 transitions, 3561 flow [2024-06-21 20:04:20,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:20,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:20,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-21 20:04:20,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:04:20,824 INFO L175 Difference]: Start difference. First operand has 183 places, 221 transitions, 2643 flow. Second operand 8 states and 188 transitions. [2024-06-21 20:04:20,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 255 transitions, 3561 flow [2024-06-21 20:04:21,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 255 transitions, 3353 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:21,054 INFO L231 Difference]: Finished difference. Result has 185 places, 237 transitions, 2926 flow [2024-06-21 20:04:21,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2435, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2926, PETRI_PLACES=185, PETRI_TRANSITIONS=237} [2024-06-21 20:04:21,054 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 144 predicate places. [2024-06-21 20:04:21,055 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 237 transitions, 2926 flow [2024-06-21 20:04:21,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:21,055 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 20:04:21,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:04:21,055 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:21,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:21,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1159582532, now seen corresponding path program 5 times [2024-06-21 20:04:21,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:21,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106620846] [2024-06-21 20:04:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:21,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:21,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:21,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106620846] [2024-06-21 20:04:21,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106620846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:21,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:21,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:21,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004080743] [2024-06-21 20:04:21,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:21,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:21,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:21,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:21,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:21,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:21,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 237 transitions, 2926 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:21,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:21,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:21,656 INFO L124 PetriNetUnfolderBase]: 1952/3274 cut-off events. [2024-06-21 20:04:21,656 INFO L125 PetriNetUnfolderBase]: For 115166/115166 co-relation queries the response was YES. [2024-06-21 20:04:21,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20642 conditions, 3274 events. 1952/3274 cut-off events. For 115166/115166 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 19720 event pairs, 448 based on Foata normal form. 3/3272 useless extension candidates. Maximal degree in co-relation 20553. Up to 2567 conditions per place. [2024-06-21 20:04:21,688 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 126 selfloop transitions, 136 changer transitions 0/269 dead transitions. [2024-06-21 20:04:21,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 269 transitions, 3898 flow [2024-06-21 20:04:21,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:21,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:21,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-21 20:04:21,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:21,690 INFO L175 Difference]: Start difference. First operand has 185 places, 237 transitions, 2926 flow. Second operand 9 states and 216 transitions. [2024-06-21 20:04:21,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 269 transitions, 3898 flow [2024-06-21 20:04:21,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 269 transitions, 3676 flow, removed 51 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:21,973 INFO L231 Difference]: Finished difference. Result has 191 places, 244 transitions, 3172 flow [2024-06-21 20:04:21,973 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3172, PETRI_PLACES=191, PETRI_TRANSITIONS=244} [2024-06-21 20:04:21,974 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 150 predicate places. [2024-06-21 20:04:21,974 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 244 transitions, 3172 flow [2024-06-21 20:04:21,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:21,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:21,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:21,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:04:21,974 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:21,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash -746029504, now seen corresponding path program 6 times [2024-06-21 20:04:21,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:21,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109075658] [2024-06-21 20:04:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:21,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:22,070 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 20:04:22,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:22,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109075658] [2024-06-21 20:04:22,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109075658] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:22,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:22,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:22,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846389890] [2024-06-21 20:04:22,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:22,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:22,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:22,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:22,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:22,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:22,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 244 transitions, 3172 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:22,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:22,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:22,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:22,555 INFO L124 PetriNetUnfolderBase]: 1947/3270 cut-off events. [2024-06-21 20:04:22,556 INFO L125 PetriNetUnfolderBase]: For 117366/117366 co-relation queries the response was YES. [2024-06-21 20:04:22,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20972 conditions, 3270 events. 1947/3270 cut-off events. For 117366/117366 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19710 event pairs, 448 based on Foata normal form. 3/3268 useless extension candidates. Maximal degree in co-relation 20881. Up to 2565 conditions per place. [2024-06-21 20:04:22,584 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 133 selfloop transitions, 126 changer transitions 0/266 dead transitions. [2024-06-21 20:04:22,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3916 flow [2024-06-21 20:04:22,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:04:22,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:04:22,586 INFO L175 Difference]: Start difference. First operand has 191 places, 244 transitions, 3172 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:04:22,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3916 flow [2024-06-21 20:04:22,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 266 transitions, 3615 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:22,877 INFO L231 Difference]: Finished difference. Result has 193 places, 244 transitions, 3139 flow [2024-06-21 20:04:22,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2871, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3139, PETRI_PLACES=193, PETRI_TRANSITIONS=244} [2024-06-21 20:04:22,878 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 152 predicate places. [2024-06-21 20:04:22,878 INFO L495 AbstractCegarLoop]: Abstraction has has 193 places, 244 transitions, 3139 flow [2024-06-21 20:04:22,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:22,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:22,878 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 20:04:22,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:04:22,879 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 20:04:22,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:22,879 INFO L85 PathProgramCache]: Analyzing trace with hash 990135285, now seen corresponding path program 1 times [2024-06-21 20:04:22,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:22,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325037496] [2024-06-21 20:04:22,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:22,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:22,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:22,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325037496] [2024-06-21 20:04:22,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325037496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:22,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:22,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:22,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599490281] [2024-06-21 20:04:22,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:22,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:22,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:22,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:22,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:23,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 193 places, 244 transitions, 3139 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:23,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:23,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:23,394 INFO L124 PetriNetUnfolderBase]: 1979/3310 cut-off events. [2024-06-21 20:04:23,394 INFO L125 PetriNetUnfolderBase]: For 124555/124555 co-relation queries the response was YES. [2024-06-21 20:04:23,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21664 conditions, 3310 events. 1979/3310 cut-off events. For 124555/124555 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 19924 event pairs, 463 based on Foata normal form. 2/3292 useless extension candidates. Maximal degree in co-relation 21572. Up to 2529 conditions per place. [2024-06-21 20:04:23,430 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 145 selfloop transitions, 132 changer transitions 0/284 dead transitions. [2024-06-21 20:04:23,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 284 transitions, 4281 flow [2024-06-21 20:04:23,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:23,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:23,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-21 20:04:23,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-21 20:04:23,431 INFO L175 Difference]: Start difference. First operand has 193 places, 244 transitions, 3139 flow. Second operand 7 states and 180 transitions. [2024-06-21 20:04:23,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 284 transitions, 4281 flow [2024-06-21 20:04:23,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 284 transitions, 4013 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:23,718 INFO L231 Difference]: Finished difference. Result has 196 places, 258 transitions, 3494 flow [2024-06-21 20:04:23,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2885, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3494, PETRI_PLACES=196, PETRI_TRANSITIONS=258} [2024-06-21 20:04:23,719 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 155 predicate places. [2024-06-21 20:04:23,719 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 258 transitions, 3494 flow [2024-06-21 20:04:23,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:23,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:23,719 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 20:04:23,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:04:23,720 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 20:04:23,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash 187543929, now seen corresponding path program 2 times [2024-06-21 20:04:23,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:23,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830410186] [2024-06-21 20:04:23,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:23,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:23,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:23,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830410186] [2024-06-21 20:04:23,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830410186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:23,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:23,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:23,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142116389] [2024-06-21 20:04:23,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:23,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:23,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:23,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:23,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:23,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:23,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 258 transitions, 3494 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:23,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:23,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:23,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:24,251 INFO L124 PetriNetUnfolderBase]: 1971/3305 cut-off events. [2024-06-21 20:04:24,251 INFO L125 PetriNetUnfolderBase]: For 128058/128061 co-relation queries the response was YES. [2024-06-21 20:04:24,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21901 conditions, 3305 events. 1971/3305 cut-off events. For 128058/128061 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 19907 event pairs, 437 based on Foata normal form. 4/3298 useless extension candidates. Maximal degree in co-relation 21806. Up to 2817 conditions per place. [2024-06-21 20:04:24,288 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 199 selfloop transitions, 72 changer transitions 0/278 dead transitions. [2024-06-21 20:04:24,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 278 transitions, 4086 flow [2024-06-21 20:04:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:04:24,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:04:24,289 INFO L175 Difference]: Start difference. First operand has 196 places, 258 transitions, 3494 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:04:24,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 278 transitions, 4086 flow [2024-06-21 20:04:24,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 278 transitions, 3927 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:24,585 INFO L231 Difference]: Finished difference. Result has 201 places, 258 transitions, 3486 flow [2024-06-21 20:04:24,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3335, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3486, PETRI_PLACES=201, PETRI_TRANSITIONS=258} [2024-06-21 20:04:24,585 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 160 predicate places. [2024-06-21 20:04:24,586 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 258 transitions, 3486 flow [2024-06-21 20:04:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:24,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:24,586 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 20:04:24,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:04:24,586 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 20:04:24,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:24,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1028463541, now seen corresponding path program 3 times [2024-06-21 20:04:24,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:24,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54492279] [2024-06-21 20:04:24,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:24,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:24,672 INFO 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 20:04:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:24,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54492279] [2024-06-21 20:04:24,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54492279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:24,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:24,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:24,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535636709] [2024-06-21 20:04:24,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:24,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:24,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:24,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:24,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:24,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 258 transitions, 3486 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:24,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:24,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:24,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:25,144 INFO L124 PetriNetUnfolderBase]: 2027/3393 cut-off events. [2024-06-21 20:04:25,144 INFO L125 PetriNetUnfolderBase]: For 136221/136224 co-relation queries the response was YES. [2024-06-21 20:04:25,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22630 conditions, 3393 events. 2027/3393 cut-off events. For 136221/136224 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 20509 event pairs, 438 based on Foata normal form. 4/3386 useless extension candidates. Maximal degree in co-relation 22533. Up to 2844 conditions per place. [2024-06-21 20:04:25,174 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 206 selfloop transitions, 88 changer transitions 0/301 dead transitions. [2024-06-21 20:04:25,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 301 transitions, 4631 flow [2024-06-21 20:04:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:25,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:04:25,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:04:25,175 INFO L175 Difference]: Start difference. First operand has 201 places, 258 transitions, 3486 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:04:25,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 301 transitions, 4631 flow [2024-06-21 20:04:25,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 301 transitions, 4438 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:25,544 INFO L231 Difference]: Finished difference. Result has 208 places, 279 transitions, 3909 flow [2024-06-21 20:04:25,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3319, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3909, PETRI_PLACES=208, PETRI_TRANSITIONS=279} [2024-06-21 20:04:25,544 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 167 predicate places. [2024-06-21 20:04:25,544 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 279 transitions, 3909 flow [2024-06-21 20:04:25,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:25,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:25,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:25,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:04:25,545 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:25,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:25,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1876997359, now seen corresponding path program 4 times [2024-06-21 20:04:25,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:25,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124858324] [2024-06-21 20:04:25,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:25,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:25,639 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 20:04:25,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:25,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124858324] [2024-06-21 20:04:25,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124858324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:25,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:25,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:25,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067266981] [2024-06-21 20:04:25,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:25,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:25,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:25,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:25,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:25,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 279 transitions, 3909 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:25,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:25,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:25,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:26,133 INFO L124 PetriNetUnfolderBase]: 2064/3444 cut-off events. [2024-06-21 20:04:26,133 INFO L125 PetriNetUnfolderBase]: For 148134/148134 co-relation queries the response was YES. [2024-06-21 20:04:26,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23596 conditions, 3444 events. 2064/3444 cut-off events. For 148134/148134 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20840 event pairs, 468 based on Foata normal form. 1/3438 useless extension candidates. Maximal degree in co-relation 23495. Up to 2564 conditions per place. [2024-06-21 20:04:26,166 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 140 selfloop transitions, 167 changer transitions 0/314 dead transitions. [2024-06-21 20:04:26,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 314 transitions, 5175 flow [2024-06-21 20:04:26,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:26,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 20:04:26,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6285714285714286 [2024-06-21 20:04:26,167 INFO L175 Difference]: Start difference. First operand has 208 places, 279 transitions, 3909 flow. Second operand 7 states and 176 transitions. [2024-06-21 20:04:26,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 314 transitions, 5175 flow [2024-06-21 20:04:26,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 314 transitions, 5014 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:26,507 INFO L231 Difference]: Finished difference. Result has 213 places, 290 transitions, 4306 flow [2024-06-21 20:04:26,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3748, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4306, PETRI_PLACES=213, PETRI_TRANSITIONS=290} [2024-06-21 20:04:26,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 172 predicate places. [2024-06-21 20:04:26,508 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 290 transitions, 4306 flow [2024-06-21 20:04:26,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:26,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:26,508 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 20:04:26,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:04:26,508 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:26,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:26,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1159976011, now seen corresponding path program 5 times [2024-06-21 20:04:26,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:26,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368917154] [2024-06-21 20:04:26,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:26,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:26,594 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 20:04:26,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:26,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368917154] [2024-06-21 20:04:26,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368917154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:26,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:26,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:26,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605517682] [2024-06-21 20:04:26,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:26,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:26,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:26,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:26,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:26,633 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:26,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 290 transitions, 4306 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:26,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:26,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:26,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:27,085 INFO L124 PetriNetUnfolderBase]: 2069/3451 cut-off events. [2024-06-21 20:04:27,085 INFO L125 PetriNetUnfolderBase]: For 155480/155480 co-relation queries the response was YES. [2024-06-21 20:04:27,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24091 conditions, 3451 events. 2069/3451 cut-off events. For 155480/155480 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20854 event pairs, 468 based on Foata normal form. 1/3445 useless extension candidates. Maximal degree in co-relation 23989. Up to 2566 conditions per place. [2024-06-21 20:04:27,120 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 142 selfloop transitions, 167 changer transitions 0/316 dead transitions. [2024-06-21 20:04:27,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 316 transitions, 5325 flow [2024-06-21 20:04:27,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-21 20:04:27,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:04:27,121 INFO L175 Difference]: Start difference. First operand has 213 places, 290 transitions, 4306 flow. Second operand 7 states and 175 transitions. [2024-06-21 20:04:27,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 316 transitions, 5325 flow [2024-06-21 20:04:27,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 316 transitions, 4988 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:27,507 INFO L231 Difference]: Finished difference. Result has 216 places, 293 transitions, 4366 flow [2024-06-21 20:04:27,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3972, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4366, PETRI_PLACES=216, PETRI_TRANSITIONS=293} [2024-06-21 20:04:27,508 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 175 predicate places. [2024-06-21 20:04:27,508 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 293 transitions, 4366 flow [2024-06-21 20:04:27,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:27,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:27,509 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 20:04:27,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:04:27,509 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:27,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:27,509 INFO L85 PathProgramCache]: Analyzing trace with hash 663125193, now seen corresponding path program 6 times [2024-06-21 20:04:27,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:27,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545518596] [2024-06-21 20:04:27,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:27,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:27,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:27,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:27,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545518596] [2024-06-21 20:04:27,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545518596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:27,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:27,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:27,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438981053] [2024-06-21 20:04:27,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:27,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:27,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:27,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:27,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:27,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:27,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 293 transitions, 4366 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:27,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:27,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:27,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:28,125 INFO L124 PetriNetUnfolderBase]: 2066/3453 cut-off events. [2024-06-21 20:04:28,126 INFO L125 PetriNetUnfolderBase]: For 157966/157966 co-relation queries the response was YES. [2024-06-21 20:04:28,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24048 conditions, 3453 events. 2066/3453 cut-off events. For 157966/157966 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 20876 event pairs, 451 based on Foata normal form. 1/3449 useless extension candidates. Maximal degree in co-relation 23946. Up to 2924 conditions per place. [2024-06-21 20:04:28,159 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 220 selfloop transitions, 85 changer transitions 0/312 dead transitions. [2024-06-21 20:04:28,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 312 transitions, 5061 flow [2024-06-21 20:04:28,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:28,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:28,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:04:28,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:04:28,160 INFO L175 Difference]: Start difference. First operand has 216 places, 293 transitions, 4366 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:04:28,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 312 transitions, 5061 flow [2024-06-21 20:04:28,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 312 transitions, 4676 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:28,522 INFO L231 Difference]: Finished difference. Result has 218 places, 295 transitions, 4202 flow [2024-06-21 20:04:28,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3986, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4202, PETRI_PLACES=218, PETRI_TRANSITIONS=295} [2024-06-21 20:04:28,523 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 177 predicate places. [2024-06-21 20:04:28,523 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 295 transitions, 4202 flow [2024-06-21 20:04:28,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:28,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:28,523 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 20:04:28,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:04:28,523 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:28,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1148548171, now seen corresponding path program 7 times [2024-06-21 20:04:28,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:28,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82655951] [2024-06-21 20:04:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:28,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:28,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:28,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:28,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82655951] [2024-06-21 20:04:28,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82655951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:28,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:28,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:28,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975752798] [2024-06-21 20:04:28,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:28,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:28,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:28,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:28,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:28,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:28,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 295 transitions, 4202 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:28,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:28,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:28,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:29,080 INFO L124 PetriNetUnfolderBase]: 2058/3434 cut-off events. [2024-06-21 20:04:29,080 INFO L125 PetriNetUnfolderBase]: For 162063/162063 co-relation queries the response was YES. [2024-06-21 20:04:29,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23581 conditions, 3434 events. 2058/3434 cut-off events. For 162063/162063 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20774 event pairs, 468 based on Foata normal form. 2/3429 useless extension candidates. Maximal degree in co-relation 23478. Up to 2560 conditions per place. [2024-06-21 20:04:29,130 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 146 selfloop transitions, 161 changer transitions 0/314 dead transitions. [2024-06-21 20:04:29,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 314 transitions, 5062 flow [2024-06-21 20:04:29,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:29,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:29,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:04:29,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 20:04:29,132 INFO L175 Difference]: Start difference. First operand has 218 places, 295 transitions, 4202 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:04:29,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 314 transitions, 5062 flow [2024-06-21 20:04:29,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 314 transitions, 4842 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:29,606 INFO L231 Difference]: Finished difference. Result has 221 places, 295 transitions, 4312 flow [2024-06-21 20:04:29,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3982, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4312, PETRI_PLACES=221, PETRI_TRANSITIONS=295} [2024-06-21 20:04:29,607 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-21 20:04:29,607 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 295 transitions, 4312 flow [2024-06-21 20:04:29,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:29,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:29,608 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 20:04:29,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:04:29,608 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:29,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:29,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1033494151, now seen corresponding path program 8 times [2024-06-21 20:04:29,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:29,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722261956] [2024-06-21 20:04:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:29,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:29,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722261956] [2024-06-21 20:04:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722261956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:29,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:29,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:29,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340629601] [2024-06-21 20:04:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:29,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:29,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:29,722 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 295 transitions, 4312 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:29,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:29,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:29,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:30,197 INFO L124 PetriNetUnfolderBase]: 2052/3434 cut-off events. [2024-06-21 20:04:30,197 INFO L125 PetriNetUnfolderBase]: For 164669/164669 co-relation queries the response was YES. [2024-06-21 20:04:30,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23797 conditions, 3434 events. 2052/3434 cut-off events. For 164669/164669 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 20804 event pairs, 449 based on Foata normal form. 2/3431 useless extension candidates. Maximal degree in co-relation 23693. Up to 2855 conditions per place. [2024-06-21 20:04:30,230 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 202 selfloop transitions, 103 changer transitions 0/312 dead transitions. [2024-06-21 20:04:30,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 312 transitions, 5064 flow [2024-06-21 20:04:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:30,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 205 transitions. [2024-06-21 20:04:30,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5694444444444444 [2024-06-21 20:04:30,231 INFO L175 Difference]: Start difference. First operand has 221 places, 295 transitions, 4312 flow. Second operand 9 states and 205 transitions. [2024-06-21 20:04:30,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 312 transitions, 5064 flow [2024-06-21 20:04:30,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 312 transitions, 4725 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:30,608 INFO L231 Difference]: Finished difference. Result has 224 places, 295 transitions, 4186 flow [2024-06-21 20:04:30,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4186, PETRI_PLACES=224, PETRI_TRANSITIONS=295} [2024-06-21 20:04:30,608 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 20:04:30,608 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 295 transitions, 4186 flow [2024-06-21 20:04:30,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:30,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:30,608 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 20:04:30,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:04:30,609 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:30,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:30,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1033257001, now seen corresponding path program 9 times [2024-06-21 20:04:30,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:30,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054947356] [2024-06-21 20:04:30,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:30,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:30,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:30,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:30,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054947356] [2024-06-21 20:04:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054947356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:30,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:30,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:30,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97615864] [2024-06-21 20:04:30,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:30,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:30,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:30,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:30,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:30,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:30,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 295 transitions, 4186 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:30,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:30,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:30,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:31,179 INFO L124 PetriNetUnfolderBase]: 2044/3421 cut-off events. [2024-06-21 20:04:31,179 INFO L125 PetriNetUnfolderBase]: For 167047/167047 co-relation queries the response was YES. [2024-06-21 20:04:31,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23424 conditions, 3421 events. 2044/3421 cut-off events. For 167047/167047 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20721 event pairs, 449 based on Foata normal form. 2/3418 useless extension candidates. Maximal degree in co-relation 23319. Up to 2847 conditions per place. [2024-06-21 20:04:31,212 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 203 selfloop transitions, 99 changer transitions 0/309 dead transitions. [2024-06-21 20:04:31,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 309 transitions, 4824 flow [2024-06-21 20:04:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:31,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:31,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:04:31,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:04:31,214 INFO L175 Difference]: Start difference. First operand has 224 places, 295 transitions, 4186 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:04:31,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 309 transitions, 4824 flow [2024-06-21 20:04:31,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 309 transitions, 4534 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:31,670 INFO L231 Difference]: Finished difference. Result has 224 places, 295 transitions, 4103 flow [2024-06-21 20:04:31,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4103, PETRI_PLACES=224, PETRI_TRANSITIONS=295} [2024-06-21 20:04:31,671 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 183 predicate places. [2024-06-21 20:04:31,671 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 295 transitions, 4103 flow [2024-06-21 20:04:31,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:31,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:31,671 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 20:04:31,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:04:31,672 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:04:31,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:31,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1587505995, now seen corresponding path program 10 times [2024-06-21 20:04:31,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:31,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406807694] [2024-06-21 20:04:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:31,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406807694] [2024-06-21 20:04:31,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406807694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:31,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:31,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:31,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357636513] [2024-06-21 20:04:31,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:31,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:31,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:31,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 295 transitions, 4103 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:31,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:31,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:31,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:32,286 INFO L124 PetriNetUnfolderBase]: 2038/3413 cut-off events. [2024-06-21 20:04:32,287 INFO L125 PetriNetUnfolderBase]: For 169340/169340 co-relation queries the response was YES. [2024-06-21 20:04:32,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23238 conditions, 3413 events. 2038/3413 cut-off events. For 169340/169340 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20688 event pairs, 449 based on Foata normal form. 2/3410 useless extension candidates. Maximal degree in co-relation 23132. Up to 2612 conditions per place. [2024-06-21 20:04:32,326 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 156 selfloop transitions, 157 changer transitions 0/320 dead transitions. [2024-06-21 20:04:32,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 320 transitions, 5003 flow [2024-06-21 20:04:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:32,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:32,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-21 20:04:32,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6357142857142857 [2024-06-21 20:04:32,327 INFO L175 Difference]: Start difference. First operand has 224 places, 295 transitions, 4103 flow. Second operand 7 states and 178 transitions. [2024-06-21 20:04:32,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 320 transitions, 5003 flow [2024-06-21 20:04:32,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 320 transitions, 4775 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:04:32,851 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 4210 flow [2024-06-21 20:04:32,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3875, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4210, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-06-21 20:04:32,851 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 20:04:32,851 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 4210 flow [2024-06-21 20:04:32,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:32,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:32,852 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 20:04:32,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:04:32,852 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 20:04:32,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:32,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1587743145, now seen corresponding path program 11 times [2024-06-21 20:04:32,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:32,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648752576] [2024-06-21 20:04:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:32,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:32,943 INFO 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 20:04:32,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:32,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648752576] [2024-06-21 20:04:32,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648752576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:32,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:32,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:32,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905626387] [2024-06-21 20:04:32,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:32,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:32,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:32,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:32,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:32,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:32,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 4210 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:32,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:32,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:32,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:33,457 INFO L124 PetriNetUnfolderBase]: 2032/3405 cut-off events. [2024-06-21 20:04:33,458 INFO L125 PetriNetUnfolderBase]: For 172678/172678 co-relation queries the response was YES. [2024-06-21 20:04:33,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23386 conditions, 3405 events. 2032/3405 cut-off events. For 172678/172678 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 20577 event pairs, 449 based on Foata normal form. 2/3402 useless extension candidates. Maximal degree in co-relation 23279. Up to 2609 conditions per place. [2024-06-21 20:04:33,492 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 152 selfloop transitions, 169 changer transitions 0/328 dead transitions. [2024-06-21 20:04:33,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 328 transitions, 5150 flow [2024-06-21 20:04:33,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:04:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:04:33,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 224 transitions. [2024-06-21 20:04:33,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6222222222222222 [2024-06-21 20:04:33,493 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 4210 flow. Second operand 9 states and 224 transitions. [2024-06-21 20:04:33,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 328 transitions, 5150 flow [2024-06-21 20:04:33,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 328 transitions, 4709 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 20:04:33,916 INFO L231 Difference]: Finished difference. Result has 225 places, 295 transitions, 4135 flow [2024-06-21 20:04:33,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3777, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=169, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4135, PETRI_PLACES=225, PETRI_TRANSITIONS=295} [2024-06-21 20:04:33,917 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 20:04:33,917 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 295 transitions, 4135 flow [2024-06-21 20:04:33,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:33,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:33,917 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 20:04:33,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:04:33,918 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 20:04:33,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:33,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1764874665, now seen corresponding path program 12 times [2024-06-21 20:04:33,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:33,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384144179] [2024-06-21 20:04:33,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:33,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:33,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:34,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384144179] [2024-06-21 20:04:34,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384144179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:34,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:34,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:34,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072071415] [2024-06-21 20:04:34,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:34,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:34,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:34,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:34,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:34,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:34,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 295 transitions, 4135 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:34,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:34,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:34,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:34,623 INFO L124 PetriNetUnfolderBase]: 2016/3381 cut-off events. [2024-06-21 20:04:34,623 INFO L125 PetriNetUnfolderBase]: For 162767/162770 co-relation queries the response was YES. [2024-06-21 20:04:34,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22799 conditions, 3381 events. 2016/3381 cut-off events. For 162767/162770 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 20464 event pairs, 435 based on Foata normal form. 6/3376 useless extension candidates. Maximal degree in co-relation 22693. Up to 2596 conditions per place. [2024-06-21 20:04:34,659 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 160 selfloop transitions, 160 changer transitions 0/327 dead transitions. [2024-06-21 20:04:34,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 327 transitions, 5067 flow [2024-06-21 20:04:34,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:04:34,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:04:34,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-21 20:04:34,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.646875 [2024-06-21 20:04:34,660 INFO L175 Difference]: Start difference. First operand has 225 places, 295 transitions, 4135 flow. Second operand 8 states and 207 transitions. [2024-06-21 20:04:34,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 327 transitions, 5067 flow [2024-06-21 20:04:35,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 327 transitions, 4670 flow, removed 23 selfloop flow, removed 11 redundant places. [2024-06-21 20:04:35,123 INFO L231 Difference]: Finished difference. Result has 222 places, 295 transitions, 4093 flow [2024-06-21 20:04:35,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3750, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4093, PETRI_PLACES=222, PETRI_TRANSITIONS=295} [2024-06-21 20:04:35,123 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 181 predicate places. [2024-06-21 20:04:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 295 transitions, 4093 flow [2024-06-21 20:04:35,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:35,124 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:35,124 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 20:04:35,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:04:35,124 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 20:04:35,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:35,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1351321521, now seen corresponding path program 1 times [2024-06-21 20:04:35,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:35,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768258944] [2024-06-21 20:04:35,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:35,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:35,217 INFO 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 20:04:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:35,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768258944] [2024-06-21 20:04:35,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768258944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:35,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:35,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:35,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807881778] [2024-06-21 20:04:35,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:35,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:35,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:35,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:35,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:35,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:35,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 295 transitions, 4093 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:35,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:35,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:35,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:35,654 INFO L124 PetriNetUnfolderBase]: 2008/3374 cut-off events. [2024-06-21 20:04:35,654 INFO L125 PetriNetUnfolderBase]: For 146795/146795 co-relation queries the response was YES. [2024-06-21 20:04:35,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22394 conditions, 3374 events. 2008/3374 cut-off events. For 146795/146795 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20455 event pairs, 406 based on Foata normal form. 2/3374 useless extension candidates. Maximal degree in co-relation 22290. Up to 3058 conditions per place. [2024-06-21 20:04:35,685 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 287 selfloop transitions, 19 changer transitions 0/313 dead transitions. [2024-06-21 20:04:35,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 313 transitions, 4783 flow [2024-06-21 20:04:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-21 20:04:35,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-21 20:04:35,686 INFO L175 Difference]: Start difference. First operand has 222 places, 295 transitions, 4093 flow. Second operand 5 states and 122 transitions. [2024-06-21 20:04:35,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 313 transitions, 4783 flow [2024-06-21 20:04:35,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 313 transitions, 4435 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 20:04:35,999 INFO L231 Difference]: Finished difference. Result has 219 places, 297 transitions, 3830 flow [2024-06-21 20:04:35,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3745, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3830, PETRI_PLACES=219, PETRI_TRANSITIONS=297} [2024-06-21 20:04:36,000 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 178 predicate places. [2024-06-21 20:04:36,000 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 297 transitions, 3830 flow [2024-06-21 20:04:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:36,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:36,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:36,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:04:36,001 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 20:04:36,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:36,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1350846291, now seen corresponding path program 2 times [2024-06-21 20:04:36,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:36,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268454273] [2024-06-21 20:04:36,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:36,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:36,081 INFO 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 20:04:36,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:36,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268454273] [2024-06-21 20:04:36,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268454273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:36,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:36,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:04:36,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264775656] [2024-06-21 20:04:36,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:36,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:04:36,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:36,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:04:36,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:04:36,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:36,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 297 transitions, 3830 flow. Second operand has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:36,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:36,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:36,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:36,523 INFO L124 PetriNetUnfolderBase]: 2003/3374 cut-off events. [2024-06-21 20:04:36,523 INFO L125 PetriNetUnfolderBase]: For 137562/137567 co-relation queries the response was YES. [2024-06-21 20:04:36,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21682 conditions, 3374 events. 2003/3374 cut-off events. For 137562/137567 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 20496 event pairs, 403 based on Foata normal form. 6/3378 useless extension candidates. Maximal degree in co-relation 21578. Up to 3031 conditions per place. [2024-06-21 20:04:36,554 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 284 selfloop transitions, 19 changer transitions 0/310 dead transitions. [2024-06-21 20:04:36,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 310 transitions, 4504 flow [2024-06-21 20:04:36,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:04:36,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:04:36,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-21 20:04:36,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:04:36,555 INFO L175 Difference]: Start difference. First operand has 219 places, 297 transitions, 3830 flow. Second operand 5 states and 115 transitions. [2024-06-21 20:04:36,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 310 transitions, 4504 flow [2024-06-21 20:04:37,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 310 transitions, 4439 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:37,039 INFO L231 Difference]: Finished difference. Result has 221 places, 299 transitions, 3854 flow [2024-06-21 20:04:37,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3765, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3854, PETRI_PLACES=221, PETRI_TRANSITIONS=299} [2024-06-21 20:04:37,040 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 180 predicate places. [2024-06-21 20:04:37,040 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 299 transitions, 3854 flow [2024-06-21 20:04:37,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.333333333333332) internal successors, (98), 6 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:37,041 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 20:04:37,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:04:37,041 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 20:04:37,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1151396203, now seen corresponding path program 1 times [2024-06-21 20:04:37,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:37,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403159384] [2024-06-21 20:04:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:37,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:37,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:37,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:37,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403159384] [2024-06-21 20:04:37,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403159384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:37,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:37,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:37,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238983539] [2024-06-21 20:04:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:37,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:37,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:37,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:37,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:37,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 299 transitions, 3854 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:37,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:37,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:37,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:37,623 INFO L124 PetriNetUnfolderBase]: 2011/3394 cut-off events. [2024-06-21 20:04:37,624 INFO L125 PetriNetUnfolderBase]: For 143716/143716 co-relation queries the response was YES. [2024-06-21 20:04:37,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3394 events. 2011/3394 cut-off events. For 143716/143716 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 20682 event pairs, 374 based on Foata normal form. 2/3395 useless extension candidates. Maximal degree in co-relation 21813. Up to 3029 conditions per place. [2024-06-21 20:04:37,659 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 288 selfloop transitions, 31 changer transitions 0/326 dead transitions. [2024-06-21 20:04:37,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 326 transitions, 4742 flow [2024-06-21 20:04:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:37,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:37,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-21 20:04:37,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:04:37,660 INFO L175 Difference]: Start difference. First operand has 221 places, 299 transitions, 3854 flow. Second operand 7 states and 161 transitions. [2024-06-21 20:04:37,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 326 transitions, 4742 flow [2024-06-21 20:04:38,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 326 transitions, 4669 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:38,021 INFO L231 Difference]: Finished difference. Result has 225 places, 303 transitions, 3944 flow [2024-06-21 20:04:38,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3781, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3944, PETRI_PLACES=225, PETRI_TRANSITIONS=303} [2024-06-21 20:04:38,021 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 184 predicate places. [2024-06-21 20:04:38,021 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 303 transitions, 3944 flow [2024-06-21 20:04:38,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:38,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:38,022 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 20:04:38,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:04:38,022 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 20:04:38,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:38,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1636281059, now seen corresponding path program 2 times [2024-06-21 20:04:38,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:38,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245711093] [2024-06-21 20:04:38,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:38,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:38,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:38,121 INFO 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 20:04:38,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:38,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245711093] [2024-06-21 20:04:38,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245711093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:38,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:38,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691094231] [2024-06-21 20:04:38,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:38,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:38,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:38,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 303 transitions, 3944 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:38,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:38,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:38,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:38,606 INFO L124 PetriNetUnfolderBase]: 2019/3406 cut-off events. [2024-06-21 20:04:38,606 INFO L125 PetriNetUnfolderBase]: For 149377/149377 co-relation queries the response was YES. [2024-06-21 20:04:38,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22153 conditions, 3406 events. 2019/3406 cut-off events. For 149377/149377 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 20772 event pairs, 405 based on Foata normal form. 2/3407 useless extension candidates. Maximal degree in co-relation 22047. Up to 3074 conditions per place. [2024-06-21 20:04:38,640 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 288 selfloop transitions, 28 changer transitions 0/323 dead transitions. [2024-06-21 20:04:38,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 323 transitions, 4670 flow [2024-06-21 20:04:38,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:38,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-21 20:04:38,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2024-06-21 20:04:38,642 INFO L175 Difference]: Start difference. First operand has 225 places, 303 transitions, 3944 flow. Second operand 7 states and 156 transitions. [2024-06-21 20:04:38,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 323 transitions, 4670 flow [2024-06-21 20:04:39,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 323 transitions, 4562 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:39,059 INFO L231 Difference]: Finished difference. Result has 229 places, 305 transitions, 3951 flow [2024-06-21 20:04:39,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3854, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3951, PETRI_PLACES=229, PETRI_TRANSITIONS=305} [2024-06-21 20:04:39,059 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 188 predicate places. [2024-06-21 20:04:39,060 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 305 transitions, 3951 flow [2024-06-21 20:04:39,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:39,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:39,060 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 20:04:39,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:04:39,060 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 20:04:39,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:39,061 INFO L85 PathProgramCache]: Analyzing trace with hash -1033248073, now seen corresponding path program 3 times [2024-06-21 20:04:39,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:39,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534819612] [2024-06-21 20:04:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:39,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:39,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:39,158 INFO 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 20:04:39,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:39,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534819612] [2024-06-21 20:04:39,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534819612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:39,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:39,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:39,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278008851] [2024-06-21 20:04:39,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:39,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:39,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:39,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:39,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 305 transitions, 3951 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:39,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:39,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:39,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:39,700 INFO L124 PetriNetUnfolderBase]: 2027/3418 cut-off events. [2024-06-21 20:04:39,700 INFO L125 PetriNetUnfolderBase]: For 154241/154241 co-relation queries the response was YES. [2024-06-21 20:04:39,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22247 conditions, 3418 events. 2027/3418 cut-off events. For 154241/154241 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 20845 event pairs, 405 based on Foata normal form. 2/3419 useless extension candidates. Maximal degree in co-relation 22139. Up to 3101 conditions per place. [2024-06-21 20:04:39,733 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 295 selfloop transitions, 20 changer transitions 0/322 dead transitions. [2024-06-21 20:04:39,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 322 transitions, 4653 flow [2024-06-21 20:04:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:39,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-21 20:04:39,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-06-21 20:04:39,735 INFO L175 Difference]: Start difference. First operand has 229 places, 305 transitions, 3951 flow. Second operand 7 states and 152 transitions. [2024-06-21 20:04:39,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 322 transitions, 4653 flow [2024-06-21 20:04:40,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 322 transitions, 4576 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:40,206 INFO L231 Difference]: Finished difference. Result has 231 places, 307 transitions, 3959 flow [2024-06-21 20:04:40,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3874, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3959, PETRI_PLACES=231, PETRI_TRANSITIONS=307} [2024-06-21 20:04:40,206 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 190 predicate places. [2024-06-21 20:04:40,207 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 307 transitions, 3959 flow [2024-06-21 20:04:40,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:40,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:40,207 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 20:04:40,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:04:40,207 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 20:04:40,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:40,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1751756927, now seen corresponding path program 1 times [2024-06-21 20:04:40,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:40,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369719484] [2024-06-21 20:04:40,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:40,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:40,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:40,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369719484] [2024-06-21 20:04:40,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369719484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:40,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:40,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:40,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494664954] [2024-06-21 20:04:40,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:40,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:40,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:40,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:40,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:40,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:40,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 307 transitions, 3959 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:40,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:40,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:40,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:40,786 INFO L124 PetriNetUnfolderBase]: 2071/3478 cut-off events. [2024-06-21 20:04:40,786 INFO L125 PetriNetUnfolderBase]: For 175504/175504 co-relation queries the response was YES. [2024-06-21 20:04:40,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22611 conditions, 3478 events. 2071/3478 cut-off events. For 175504/175504 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 21176 event pairs, 446 based on Foata normal form. 12/3485 useless extension candidates. Maximal degree in co-relation 22502. Up to 2900 conditions per place. [2024-06-21 20:04:40,820 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 238 selfloop transitions, 83 changer transitions 0/328 dead transitions. [2024-06-21 20:04:40,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 328 transitions, 4713 flow [2024-06-21 20:04:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:40,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:04:40,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:04:40,821 INFO L175 Difference]: Start difference. First operand has 231 places, 307 transitions, 3959 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:04:40,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 328 transitions, 4713 flow [2024-06-21 20:04:41,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 328 transitions, 4648 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:41,257 INFO L231 Difference]: Finished difference. Result has 233 places, 310 transitions, 4131 flow [2024-06-21 20:04:41,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4131, PETRI_PLACES=233, PETRI_TRANSITIONS=310} [2024-06-21 20:04:41,258 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 192 predicate places. [2024-06-21 20:04:41,258 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 310 transitions, 4131 flow [2024-06-21 20:04:41,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:41,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:41,258 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 20:04:41,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:04:41,259 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 20:04:41,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:41,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1587497067, now seen corresponding path program 4 times [2024-06-21 20:04:41,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:41,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183958647] [2024-06-21 20:04:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:41,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:41,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:41,353 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 20:04:41,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:41,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183958647] [2024-06-21 20:04:41,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183958647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:41,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:41,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:41,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199763147] [2024-06-21 20:04:41,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:41,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:41,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:41,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:41,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 310 transitions, 4131 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:41,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:41,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:41,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:41,951 INFO L124 PetriNetUnfolderBase]: 2066/3479 cut-off events. [2024-06-21 20:04:41,951 INFO L125 PetriNetUnfolderBase]: For 163328/163328 co-relation queries the response was YES. [2024-06-21 20:04:41,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22906 conditions, 3479 events. 2066/3479 cut-off events. For 163328/163328 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 21224 event pairs, 377 based on Foata normal form. 2/3480 useless extension candidates. Maximal degree in co-relation 22796. Up to 3126 conditions per place. [2024-06-21 20:04:41,981 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 294 selfloop transitions, 29 changer transitions 0/330 dead transitions. [2024-06-21 20:04:41,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 330 transitions, 4827 flow [2024-06-21 20:04:41,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:41,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:41,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 20:04:41,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-21 20:04:41,983 INFO L175 Difference]: Start difference. First operand has 233 places, 310 transitions, 4131 flow. Second operand 6 states and 142 transitions. [2024-06-21 20:04:41,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 330 transitions, 4827 flow [2024-06-21 20:04:42,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 330 transitions, 4598 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:42,421 INFO L231 Difference]: Finished difference. Result has 234 places, 310 transitions, 3971 flow [2024-06-21 20:04:42,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3971, PETRI_PLACES=234, PETRI_TRANSITIONS=310} [2024-06-21 20:04:42,422 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 193 predicate places. [2024-06-21 20:04:42,422 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 310 transitions, 3971 flow [2024-06-21 20:04:42,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:42,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:42,422 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 20:04:42,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:04:42,422 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 20:04:42,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:42,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1359411219, now seen corresponding path program 2 times [2024-06-21 20:04:42,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:42,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228443842] [2024-06-21 20:04:42,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:42,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:42,511 INFO 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 20:04:42,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:42,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228443842] [2024-06-21 20:04:42,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228443842] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:42,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212079655] [2024-06-21 20:04:42,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:42,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:42,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:42,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:42,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 310 transitions, 3971 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:42,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:42,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:42,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:43,124 INFO L124 PetriNetUnfolderBase]: 2110/3550 cut-off events. [2024-06-21 20:04:43,124 INFO L125 PetriNetUnfolderBase]: For 185289/185292 co-relation queries the response was YES. [2024-06-21 20:04:43,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22994 conditions, 3550 events. 2110/3550 cut-off events. For 185289/185292 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 21719 event pairs, 480 based on Foata normal form. 14/3556 useless extension candidates. Maximal degree in co-relation 22883. Up to 2961 conditions per place. [2024-06-21 20:04:43,159 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 246 selfloop transitions, 74 changer transitions 0/327 dead transitions. [2024-06-21 20:04:43,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 327 transitions, 4719 flow [2024-06-21 20:04:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 20:04:43,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958333333333333 [2024-06-21 20:04:43,160 INFO L175 Difference]: Start difference. First operand has 234 places, 310 transitions, 3971 flow. Second operand 6 states and 143 transitions. [2024-06-21 20:04:43,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 327 transitions, 4719 flow [2024-06-21 20:04:43,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 327 transitions, 4652 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:43,613 INFO L231 Difference]: Finished difference. Result has 235 places, 313 transitions, 4129 flow [2024-06-21 20:04:43,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3904, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=236, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4129, PETRI_PLACES=235, PETRI_TRANSITIONS=313} [2024-06-21 20:04:43,614 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 194 predicate places. [2024-06-21 20:04:43,614 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 313 transitions, 4129 flow [2024-06-21 20:04:43,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:43,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:43,615 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 20:04:43,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:04:43,615 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 20:04:43,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:43,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1350840339, now seen corresponding path program 3 times [2024-06-21 20:04:43,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:43,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122403224] [2024-06-21 20:04:43,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:43,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:43,713 INFO 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 20:04:43,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:43,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122403224] [2024-06-21 20:04:43,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122403224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:43,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:43,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:43,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894967330] [2024-06-21 20:04:43,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:43,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:43,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:43,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:43,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:43,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:43,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 313 transitions, 4129 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:43,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:43,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:43,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:44,292 INFO L124 PetriNetUnfolderBase]: 2269/3805 cut-off events. [2024-06-21 20:04:44,292 INFO L125 PetriNetUnfolderBase]: For 214910/214913 co-relation queries the response was YES. [2024-06-21 20:04:44,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25633 conditions, 3805 events. 2269/3805 cut-off events. For 214910/214913 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 23590 event pairs, 494 based on Foata normal form. 14/3811 useless extension candidates. Maximal degree in co-relation 25521. Up to 2912 conditions per place. [2024-06-21 20:04:44,329 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 254 selfloop transitions, 78 changer transitions 0/339 dead transitions. [2024-06-21 20:04:44,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 339 transitions, 5129 flow [2024-06-21 20:04:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:44,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:44,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:04:44,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:04:44,330 INFO L175 Difference]: Start difference. First operand has 235 places, 313 transitions, 4129 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:04:44,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 339 transitions, 5129 flow [2024-06-21 20:04:44,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 339 transitions, 4934 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:44,977 INFO L231 Difference]: Finished difference. Result has 238 places, 319 transitions, 4254 flow [2024-06-21 20:04:44,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4254, PETRI_PLACES=238, PETRI_TRANSITIONS=319} [2024-06-21 20:04:44,977 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 197 predicate places. [2024-06-21 20:04:44,977 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 319 transitions, 4254 flow [2024-06-21 20:04:44,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:44,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:44,977 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 20:04:44,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:04:44,978 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 20:04:44,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:44,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1587312369, now seen corresponding path program 4 times [2024-06-21 20:04:44,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:44,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886851653] [2024-06-21 20:04:44,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:44,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:45,069 INFO 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 20:04:45,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:45,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886851653] [2024-06-21 20:04:45,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886851653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:45,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:45,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:45,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787397671] [2024-06-21 20:04:45,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:45,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:45,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:45,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:45,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:45,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:45,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 319 transitions, 4254 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:45,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:45,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:45,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:45,695 INFO L124 PetriNetUnfolderBase]: 2287/3824 cut-off events. [2024-06-21 20:04:45,695 INFO L125 PetriNetUnfolderBase]: For 217378/217378 co-relation queries the response was YES. [2024-06-21 20:04:45,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25889 conditions, 3824 events. 2287/3824 cut-off events. For 217378/217378 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 23616 event pairs, 510 based on Foata normal form. 12/3831 useless extension candidates. Maximal degree in co-relation 25775. Up to 3192 conditions per place. [2024-06-21 20:04:45,734 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 243 selfloop transitions, 88 changer transitions 0/338 dead transitions. [2024-06-21 20:04:45,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 338 transitions, 5017 flow [2024-06-21 20:04:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:45,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:45,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:04:45,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:04:45,735 INFO L175 Difference]: Start difference. First operand has 238 places, 319 transitions, 4254 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:04:45,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 338 transitions, 5017 flow [2024-06-21 20:04:46,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 338 transitions, 4861 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:46,227 INFO L231 Difference]: Finished difference. Result has 242 places, 321 transitions, 4339 flow [2024-06-21 20:04:46,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4100, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4339, PETRI_PLACES=242, PETRI_TRANSITIONS=321} [2024-06-21 20:04:46,227 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 201 predicate places. [2024-06-21 20:04:46,227 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 321 transitions, 4339 flow [2024-06-21 20:04:46,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:46,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:46,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:46,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:04:46,228 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 20:04:46,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:46,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1957778289, now seen corresponding path program 1 times [2024-06-21 20:04:46,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:46,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289006655] [2024-06-21 20:04:46,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:46,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:46,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:46,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:46,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289006655] [2024-06-21 20:04:46,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289006655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:46,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:46,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:46,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512690762] [2024-06-21 20:04:46,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:46,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:46,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:46,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:46,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:46,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:46,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 321 transitions, 4339 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:46,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:46,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:46,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:46,915 INFO L124 PetriNetUnfolderBase]: 2462/4117 cut-off events. [2024-06-21 20:04:46,915 INFO L125 PetriNetUnfolderBase]: For 262704/262712 co-relation queries the response was YES. [2024-06-21 20:04:46,944 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28754 conditions, 4117 events. 2462/4117 cut-off events. For 262704/262712 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 25644 event pairs, 455 based on Foata normal form. 18/4129 useless extension candidates. Maximal degree in co-relation 28638. Up to 3167 conditions per place. [2024-06-21 20:04:46,957 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 269 selfloop transitions, 83 changer transitions 0/359 dead transitions. [2024-06-21 20:04:46,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 359 transitions, 5376 flow [2024-06-21 20:04:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:46,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 20:04:46,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178571428571429 [2024-06-21 20:04:46,958 INFO L175 Difference]: Start difference. First operand has 242 places, 321 transitions, 4339 flow. Second operand 7 states and 173 transitions. [2024-06-21 20:04:46,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 359 transitions, 5376 flow [2024-06-21 20:04:47,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 359 transitions, 5164 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:47,530 INFO L231 Difference]: Finished difference. Result has 247 places, 330 transitions, 4463 flow [2024-06-21 20:04:47,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4127, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4463, PETRI_PLACES=247, PETRI_TRANSITIONS=330} [2024-06-21 20:04:47,530 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 206 predicate places. [2024-06-21 20:04:47,530 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 330 transitions, 4463 flow [2024-06-21 20:04:47,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:47,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:47,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:47,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:04:47,531 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 20:04:47,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:47,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1522189323, now seen corresponding path program 2 times [2024-06-21 20:04:47,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:47,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496331334] [2024-06-21 20:04:47,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:47,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:47,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:47,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:47,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496331334] [2024-06-21 20:04:47,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496331334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:47,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:47,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:47,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545857482] [2024-06-21 20:04:47,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:47,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:47,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:47,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:47,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:47,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:47,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 330 transitions, 4463 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:47,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:47,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:47,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:48,258 INFO L124 PetriNetUnfolderBase]: 2518/4219 cut-off events. [2024-06-21 20:04:48,259 INFO L125 PetriNetUnfolderBase]: For 280808/280816 co-relation queries the response was YES. [2024-06-21 20:04:48,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29692 conditions, 4219 events. 2518/4219 cut-off events. For 280808/280816 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26602 event pairs, 584 based on Foata normal form. 22/4235 useless extension candidates. Maximal degree in co-relation 29573. Up to 3577 conditions per place. [2024-06-21 20:04:48,304 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 273 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-21 20:04:48,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 353 transitions, 5256 flow [2024-06-21 20:04:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:04:48,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:04:48,305 INFO L175 Difference]: Start difference. First operand has 247 places, 330 transitions, 4463 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:04:48,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 353 transitions, 5256 flow [2024-06-21 20:04:49,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 353 transitions, 5083 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 20:04:49,104 INFO L231 Difference]: Finished difference. Result has 251 places, 332 transitions, 4485 flow [2024-06-21 20:04:49,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4290, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4485, PETRI_PLACES=251, PETRI_TRANSITIONS=332} [2024-06-21 20:04:49,105 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 210 predicate places. [2024-06-21 20:04:49,105 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 332 transitions, 4485 flow [2024-06-21 20:04:49,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:49,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:49,105 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 20:04:49,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:04:49,106 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 20:04:49,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:49,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1521862893, now seen corresponding path program 3 times [2024-06-21 20:04:49,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:49,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587856837] [2024-06-21 20:04:49,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:49,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:49,179 INFO 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 20:04:49,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587856837] [2024-06-21 20:04:49,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587856837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:49,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:49,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:49,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879883708] [2024-06-21 20:04:49,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:49,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:49,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:49,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:49,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:49,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:49,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 332 transitions, 4485 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:49,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:49,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:49,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:49,829 INFO L124 PetriNetUnfolderBase]: 2574/4315 cut-off events. [2024-06-21 20:04:49,830 INFO L125 PetriNetUnfolderBase]: For 282188/282196 co-relation queries the response was YES. [2024-06-21 20:04:49,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30318 conditions, 4315 events. 2574/4315 cut-off events. For 282188/282196 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27374 event pairs, 584 based on Foata normal form. 18/4327 useless extension candidates. Maximal degree in co-relation 30198. Up to 3605 conditions per place. [2024-06-21 20:04:49,875 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 277 selfloop transitions, 77 changer transitions 0/361 dead transitions. [2024-06-21 20:04:49,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 361 transitions, 5343 flow [2024-06-21 20:04:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:49,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-21 20:04:49,876 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6035714285714285 [2024-06-21 20:04:49,876 INFO L175 Difference]: Start difference. First operand has 251 places, 332 transitions, 4485 flow. Second operand 7 states and 169 transitions. [2024-06-21 20:04:49,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 361 transitions, 5343 flow [2024-06-21 20:04:50,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 361 transitions, 5183 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:50,476 INFO L231 Difference]: Finished difference. Result has 254 places, 337 transitions, 4578 flow [2024-06-21 20:04:50,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4325, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4578, PETRI_PLACES=254, PETRI_TRANSITIONS=337} [2024-06-21 20:04:50,476 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 213 predicate places. [2024-06-21 20:04:50,477 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 337 transitions, 4578 flow [2024-06-21 20:04:50,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:50,477 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 20:04:50,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:04:50,477 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 20:04:50,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:50,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1732806749, now seen corresponding path program 4 times [2024-06-21 20:04:50,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:50,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505704470] [2024-06-21 20:04:50,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:50,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:50,569 INFO 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 20:04:50,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:50,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505704470] [2024-06-21 20:04:50,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505704470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:50,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:50,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:50,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221262855] [2024-06-21 20:04:50,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:50,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:50,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:50,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:50,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:50,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:50,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 337 transitions, 4578 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:50,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:50,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:50,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:51,270 INFO L124 PetriNetUnfolderBase]: 2630/4400 cut-off events. [2024-06-21 20:04:51,270 INFO L125 PetriNetUnfolderBase]: For 299809/299812 co-relation queries the response was YES. [2024-06-21 20:04:51,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31062 conditions, 4400 events. 2630/4400 cut-off events. For 299809/299812 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27947 event pairs, 624 based on Foata normal form. 18/4410 useless extension candidates. Maximal degree in co-relation 30940. Up to 3753 conditions per place. [2024-06-21 20:04:51,316 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 273 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-21 20:04:51,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 353 transitions, 5357 flow [2024-06-21 20:04:51,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-21 20:04:51,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-21 20:04:51,317 INFO L175 Difference]: Start difference. First operand has 254 places, 337 transitions, 4578 flow. Second operand 6 states and 141 transitions. [2024-06-21 20:04:51,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 353 transitions, 5357 flow [2024-06-21 20:04:51,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 353 transitions, 5184 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:51,929 INFO L231 Difference]: Finished difference. Result has 256 places, 339 transitions, 4604 flow [2024-06-21 20:04:51,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4405, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=337, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4604, PETRI_PLACES=256, PETRI_TRANSITIONS=339} [2024-06-21 20:04:51,930 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 215 predicate places. [2024-06-21 20:04:51,930 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 339 transitions, 4604 flow [2024-06-21 20:04:51,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:51,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:51,930 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 20:04:51,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:04:51,930 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 20:04:51,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:51,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1743531509, now seen corresponding path program 5 times [2024-06-21 20:04:51,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:51,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089637306] [2024-06-21 20:04:51,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:51,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:52,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:52,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089637306] [2024-06-21 20:04:52,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089637306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:52,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:52,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:52,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739783520] [2024-06-21 20:04:52,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:52,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:52,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:52,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 339 transitions, 4604 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:52,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:52,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:52,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:52,701 INFO L124 PetriNetUnfolderBase]: 2591/4346 cut-off events. [2024-06-21 20:04:52,701 INFO L125 PetriNetUnfolderBase]: For 276914/276922 co-relation queries the response was YES. [2024-06-21 20:04:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29754 conditions, 4346 events. 2591/4346 cut-off events. For 276914/276922 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27608 event pairs, 587 based on Foata normal form. 22/4362 useless extension candidates. Maximal degree in co-relation 29631. Up to 3632 conditions per place. [2024-06-21 20:04:52,749 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 276 selfloop transitions, 76 changer transitions 0/359 dead transitions. [2024-06-21 20:04:52,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 359 transitions, 5368 flow [2024-06-21 20:04:52,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:52,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:52,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:04:52,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:04:52,750 INFO L175 Difference]: Start difference. First operand has 256 places, 339 transitions, 4604 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:04:52,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 359 transitions, 5368 flow [2024-06-21 20:04:53,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 359 transitions, 5204 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:53,478 INFO L231 Difference]: Finished difference. Result has 258 places, 339 transitions, 4602 flow [2024-06-21 20:04:53,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4440, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4602, PETRI_PLACES=258, PETRI_TRANSITIONS=339} [2024-06-21 20:04:53,478 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 217 predicate places. [2024-06-21 20:04:53,478 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 339 transitions, 4602 flow [2024-06-21 20:04:53,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:53,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:53,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:53,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:04:53,479 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 20:04:53,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:53,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1743857939, now seen corresponding path program 6 times [2024-06-21 20:04:53,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:53,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525808514] [2024-06-21 20:04:53,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:53,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:53,558 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 20:04:53,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:53,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525808514] [2024-06-21 20:04:53,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525808514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:53,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:53,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:53,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286796785] [2024-06-21 20:04:53,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:53,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:53,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:53,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:53,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:53,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:53,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 339 transitions, 4602 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:53,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:53,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:53,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:54,310 INFO L124 PetriNetUnfolderBase]: 2565/4294 cut-off events. [2024-06-21 20:04:54,311 INFO L125 PetriNetUnfolderBase]: For 251205/251213 co-relation queries the response was YES. [2024-06-21 20:04:54,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28841 conditions, 4294 events. 2565/4294 cut-off events. For 251205/251213 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 27094 event pairs, 439 based on Foata normal form. 18/4306 useless extension candidates. Maximal degree in co-relation 28717. Up to 3230 conditions per place. [2024-06-21 20:04:54,352 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 266 selfloop transitions, 92 changer transitions 0/365 dead transitions. [2024-06-21 20:04:54,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 365 transitions, 5398 flow [2024-06-21 20:04:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:04:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:04:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:04:54,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:04:54,353 INFO L175 Difference]: Start difference. First operand has 258 places, 339 transitions, 4602 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:04:54,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 365 transitions, 5398 flow [2024-06-21 20:04:54,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 365 transitions, 5212 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:04:54,997 INFO L231 Difference]: Finished difference. Result has 260 places, 339 transitions, 4611 flow [2024-06-21 20:04:54,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4416, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4611, PETRI_PLACES=260, PETRI_TRANSITIONS=339} [2024-06-21 20:04:54,998 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 219 predicate places. [2024-06-21 20:04:54,998 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 339 transitions, 4611 flow [2024-06-21 20:04:54,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:54,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:54,998 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 20:04:54,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:04:54,998 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 20:04:54,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:54,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1502298395, now seen corresponding path program 1 times [2024-06-21 20:04:54,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:54,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7856527] [2024-06-21 20:04:54,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:54,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:55,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:55,073 INFO 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 20:04:55,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:55,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7856527] [2024-06-21 20:04:55,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7856527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:55,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:55,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:55,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993183212] [2024-06-21 20:04:55,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:55,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:55,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:55,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:55,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:55,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 339 transitions, 4611 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:55,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:55,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:55,863 INFO L124 PetriNetUnfolderBase]: 2626/4369 cut-off events. [2024-06-21 20:04:55,863 INFO L125 PetriNetUnfolderBase]: For 242116/242116 co-relation queries the response was YES. [2024-06-21 20:04:55,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29947 conditions, 4369 events. 2626/4369 cut-off events. For 242116/242116 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27534 event pairs, 582 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 29822. Up to 3448 conditions per place. [2024-06-21 20:04:55,913 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 196 selfloop transitions, 183 changer transitions 0/386 dead transitions. [2024-06-21 20:04:55,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 386 transitions, 6264 flow [2024-06-21 20:04:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:55,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:55,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 20:04:55,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-06-21 20:04:55,914 INFO L175 Difference]: Start difference. First operand has 260 places, 339 transitions, 4611 flow. Second operand 7 states and 179 transitions. [2024-06-21 20:04:55,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 386 transitions, 6264 flow [2024-06-21 20:04:56,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 386 transitions, 6054 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:04:56,662 INFO L231 Difference]: Finished difference. Result has 262 places, 359 transitions, 5114 flow [2024-06-21 20:04:56,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4417, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5114, PETRI_PLACES=262, PETRI_TRANSITIONS=359} [2024-06-21 20:04:56,662 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 221 predicate places. [2024-06-21 20:04:56,663 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 359 transitions, 5114 flow [2024-06-21 20:04:56,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:56,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:56,663 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 20:04:56,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:04:56,663 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 20:04:56,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:56,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1509515117, now seen corresponding path program 2 times [2024-06-21 20:04:56,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:56,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841180919] [2024-06-21 20:04:56,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:56,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:56,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:56,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:04:56,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:56,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841180919] [2024-06-21 20:04:56,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841180919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:56,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:56,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017503441] [2024-06-21 20:04:56,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:56,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:56,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:56,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:56,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:56,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:56,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 359 transitions, 5114 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:56,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:56,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:56,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:57,475 INFO L124 PetriNetUnfolderBase]: 2623/4364 cut-off events. [2024-06-21 20:04:57,475 INFO L125 PetriNetUnfolderBase]: For 233934/233934 co-relation queries the response was YES. [2024-06-21 20:04:57,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29809 conditions, 4364 events. 2623/4364 cut-off events. For 233934/233934 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 27507 event pairs, 582 based on Foata normal form. 1/4345 useless extension candidates. Maximal degree in co-relation 29684. Up to 3446 conditions per place. [2024-06-21 20:04:57,519 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 187 selfloop transitions, 194 changer transitions 0/388 dead transitions. [2024-06-21 20:04:57,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 388 transitions, 6320 flow [2024-06-21 20:04:57,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:57,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 20:04:57,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:04:57,520 INFO L175 Difference]: Start difference. First operand has 262 places, 359 transitions, 5114 flow. Second operand 7 states and 182 transitions. [2024-06-21 20:04:57,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 388 transitions, 6320 flow [2024-06-21 20:04:58,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 388 transitions, 6056 flow, removed 31 selfloop flow, removed 2 redundant places. [2024-06-21 20:04:58,139 INFO L231 Difference]: Finished difference. Result has 267 places, 359 transitions, 5244 flow [2024-06-21 20:04:58,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4850, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5244, PETRI_PLACES=267, PETRI_TRANSITIONS=359} [2024-06-21 20:04:58,140 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 20:04:58,140 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 359 transitions, 5244 flow [2024-06-21 20:04:58,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:58,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:58,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:58,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:04:58,140 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 20:04:58,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:58,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1509635087, now seen corresponding path program 3 times [2024-06-21 20:04:58,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:58,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210389263] [2024-06-21 20:04:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:58,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:58,213 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 20:04:58,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:58,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210389263] [2024-06-21 20:04:58,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210389263] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:58,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:58,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:58,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450568282] [2024-06-21 20:04:58,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:58,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:58,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 359 transitions, 5244 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:58,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:58,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:58,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:04:58,940 INFO L124 PetriNetUnfolderBase]: 2628/4381 cut-off events. [2024-06-21 20:04:58,940 INFO L125 PetriNetUnfolderBase]: For 241609/241612 co-relation queries the response was YES. [2024-06-21 20:04:58,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30090 conditions, 4381 events. 2628/4381 cut-off events. For 241609/241612 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27715 event pairs, 555 based on Foata normal form. 3/4373 useless extension candidates. Maximal degree in co-relation 29964. Up to 3806 conditions per place. [2024-06-21 20:04:58,986 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 292 selfloop transitions, 86 changer transitions 0/385 dead transitions. [2024-06-21 20:04:58,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 385 transitions, 6117 flow [2024-06-21 20:04:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:04:58,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:04:58,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-21 20:04:58,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-21 20:04:58,987 INFO L175 Difference]: Start difference. First operand has 267 places, 359 transitions, 5244 flow. Second operand 7 states and 172 transitions. [2024-06-21 20:04:58,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 385 transitions, 6117 flow [2024-06-21 20:04:59,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 385 transitions, 5499 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-21 20:04:59,575 INFO L231 Difference]: Finished difference. Result has 267 places, 362 transitions, 4869 flow [2024-06-21 20:04:59,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4639, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4869, PETRI_PLACES=267, PETRI_TRANSITIONS=362} [2024-06-21 20:04:59,576 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 226 predicate places. [2024-06-21 20:04:59,576 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 362 transitions, 4869 flow [2024-06-21 20:04:59,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:59,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:04:59,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:04:59,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:04:59,576 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 20:04:59,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:04:59,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1515176027, now seen corresponding path program 4 times [2024-06-21 20:04:59,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:04:59,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129878355] [2024-06-21 20:04:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:04:59,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:04:59,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:04:59,651 INFO 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 20:04:59,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:04:59,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129878355] [2024-06-21 20:04:59,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129878355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:04:59,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:04:59,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:04:59,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804299520] [2024-06-21 20:04:59,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:04:59,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:04:59,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:04:59,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:04:59,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:04:59,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:04:59,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 362 transitions, 4869 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:04:59,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:04:59,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:04:59,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:00,390 INFO L124 PetriNetUnfolderBase]: 2625/4369 cut-off events. [2024-06-21 20:05:00,391 INFO L125 PetriNetUnfolderBase]: For 243343/243343 co-relation queries the response was YES. [2024-06-21 20:05:00,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29438 conditions, 4369 events. 2625/4369 cut-off events. For 243343/243343 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27581 event pairs, 582 based on Foata normal form. 1/4350 useless extension candidates. Maximal degree in co-relation 29312. Up to 3448 conditions per place. [2024-06-21 20:05:00,439 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 197 selfloop transitions, 181 changer transitions 0/385 dead transitions. [2024-06-21 20:05:00,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 385 transitions, 6065 flow [2024-06-21 20:05:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:00,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 174 transitions. [2024-06-21 20:05:00,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2024-06-21 20:05:00,440 INFO L175 Difference]: Start difference. First operand has 267 places, 362 transitions, 4869 flow. Second operand 7 states and 174 transitions. [2024-06-21 20:05:00,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 385 transitions, 6065 flow [2024-06-21 20:05:01,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 385 transitions, 5875 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:01,127 INFO L231 Difference]: Finished difference. Result has 268 places, 362 transitions, 5048 flow [2024-06-21 20:05:01,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4679, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5048, PETRI_PLACES=268, PETRI_TRANSITIONS=362} [2024-06-21 20:05:01,127 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 227 predicate places. [2024-06-21 20:05:01,128 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 362 transitions, 5048 flow [2024-06-21 20:05:01,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:01,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:01,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:05:01,128 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 20:05:01,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1518889517, now seen corresponding path program 5 times [2024-06-21 20:05:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:01,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467604059] [2024-06-21 20:05:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:01,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:01,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:01,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467604059] [2024-06-21 20:05:01,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467604059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:01,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:01,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:01,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473311053] [2024-06-21 20:05:01,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:01,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:01,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:01,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:01,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:01,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 362 transitions, 5048 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:01,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:01,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:01,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:02,121 INFO L124 PetriNetUnfolderBase]: 2622/4373 cut-off events. [2024-06-21 20:05:02,121 INFO L125 PetriNetUnfolderBase]: For 249406/249409 co-relation queries the response was YES. [2024-06-21 20:05:02,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29755 conditions, 4373 events. 2622/4373 cut-off events. For 249406/249409 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27718 event pairs, 555 based on Foata normal form. 3/4365 useless extension candidates. Maximal degree in co-relation 29629. Up to 3772 conditions per place. [2024-06-21 20:05:02,169 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 279 selfloop transitions, 97 changer transitions 0/383 dead transitions. [2024-06-21 20:05:02,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 383 transitions, 5990 flow [2024-06-21 20:05:02,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:02,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 20:05:02,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5638888888888889 [2024-06-21 20:05:02,170 INFO L175 Difference]: Start difference. First operand has 268 places, 362 transitions, 5048 flow. Second operand 9 states and 203 transitions. [2024-06-21 20:05:02,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 383 transitions, 5990 flow [2024-06-21 20:05:02,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 383 transitions, 5669 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:02,964 INFO L231 Difference]: Finished difference. Result has 274 places, 363 transitions, 4962 flow [2024-06-21 20:05:02,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4727, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4962, PETRI_PLACES=274, PETRI_TRANSITIONS=363} [2024-06-21 20:05:02,965 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 233 predicate places. [2024-06-21 20:05:02,965 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 363 transitions, 4962 flow [2024-06-21 20:05:02,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:02,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:02,965 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 20:05:02,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:05:02,965 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 20:05:02,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:02,966 INFO L85 PathProgramCache]: Analyzing trace with hash -65971497, now seen corresponding path program 6 times [2024-06-21 20:05:02,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:02,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652163298] [2024-06-21 20:05:02,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:02,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:03,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:03,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:03,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652163298] [2024-06-21 20:05:03,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652163298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:03,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:03,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:03,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424578989] [2024-06-21 20:05:03,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:03,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:03,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:03,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:03,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:03,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:03,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 363 transitions, 4962 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:03,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:03,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:03,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:03,712 INFO L124 PetriNetUnfolderBase]: 2619/4369 cut-off events. [2024-06-21 20:05:03,712 INFO L125 PetriNetUnfolderBase]: For 253387/253390 co-relation queries the response was YES. [2024-06-21 20:05:03,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29542 conditions, 4369 events. 2619/4369 cut-off events. For 253387/253390 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27654 event pairs, 555 based on Foata normal form. 3/4361 useless extension candidates. Maximal degree in co-relation 29414. Up to 3769 conditions per place. [2024-06-21 20:05:03,760 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 281 selfloop transitions, 92 changer transitions 0/380 dead transitions. [2024-06-21 20:05:03,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 380 transitions, 5750 flow [2024-06-21 20:05:03,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-21 20:05:03,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-21 20:05:03,761 INFO L175 Difference]: Start difference. First operand has 274 places, 363 transitions, 4962 flow. Second operand 7 states and 165 transitions. [2024-06-21 20:05:03,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 380 transitions, 5750 flow [2024-06-21 20:05:04,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 380 transitions, 5578 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:04,466 INFO L231 Difference]: Finished difference. Result has 277 places, 363 transitions, 4982 flow [2024-06-21 20:05:04,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4790, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4982, PETRI_PLACES=277, PETRI_TRANSITIONS=363} [2024-06-21 20:05:04,466 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 20:05:04,466 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 363 transitions, 4982 flow [2024-06-21 20:05:04,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:04,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:04,466 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 20:05:04,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:05:04,467 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 20:05:04,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash -429810129, now seen corresponding path program 1 times [2024-06-21 20:05:04,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:04,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712697804] [2024-06-21 20:05:04,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:04,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:04,551 INFO 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 20:05:04,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:04,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712697804] [2024-06-21 20:05:04,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712697804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:04,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:04,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:04,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118425283] [2024-06-21 20:05:04,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:04,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:04,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:04,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:04,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:04,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:04,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 363 transitions, 4982 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:04,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:04,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:04,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:05,266 INFO L124 PetriNetUnfolderBase]: 2586/4329 cut-off events. [2024-06-21 20:05:05,266 INFO L125 PetriNetUnfolderBase]: For 260780/260783 co-relation queries the response was YES. [2024-06-21 20:05:05,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28623 conditions, 4329 events. 2586/4329 cut-off events. For 260780/260783 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 27467 event pairs, 542 based on Foata normal form. 14/4335 useless extension candidates. Maximal degree in co-relation 28494. Up to 3246 conditions per place. [2024-06-21 20:05:05,312 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 288 selfloop transitions, 85 changer transitions 0/380 dead transitions. [2024-06-21 20:05:05,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 380 transitions, 5784 flow [2024-06-21 20:05:05,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:05,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 20:05:05,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:05:05,313 INFO L175 Difference]: Start difference. First operand has 277 places, 363 transitions, 4982 flow. Second operand 6 states and 144 transitions. [2024-06-21 20:05:05,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 380 transitions, 5784 flow [2024-06-21 20:05:05,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 380 transitions, 5590 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:05,913 INFO L231 Difference]: Finished difference. Result has 277 places, 363 transitions, 4967 flow [2024-06-21 20:05:05,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4788, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4967, PETRI_PLACES=277, PETRI_TRANSITIONS=363} [2024-06-21 20:05:05,914 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 236 predicate places. [2024-06-21 20:05:05,914 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 363 transitions, 4967 flow [2024-06-21 20:05:05,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:05,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:05,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:05,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:05:05,915 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 20:05:05,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:05,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1720298571, now seen corresponding path program 7 times [2024-06-21 20:05:05,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:05,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864841098] [2024-06-21 20:05:05,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:05,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:05,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:05,994 INFO 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 20:05:05,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:05,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864841098] [2024-06-21 20:05:05,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864841098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:05,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:05,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:05,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120465502] [2024-06-21 20:05:05,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:05,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:05,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:05,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:05,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:06,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:06,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 363 transitions, 4967 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:06,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:06,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:06,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:06,623 INFO L124 PetriNetUnfolderBase]: 2591/4338 cut-off events. [2024-06-21 20:05:06,623 INFO L125 PetriNetUnfolderBase]: For 242397/242400 co-relation queries the response was YES. [2024-06-21 20:05:06,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28869 conditions, 4338 events. 2591/4338 cut-off events. For 242397/242400 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 27579 event pairs, 588 based on Foata normal form. 3/4333 useless extension candidates. Maximal degree in co-relation 28739. Up to 3397 conditions per place. [2024-06-21 20:05:06,671 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 157 changer transitions 0/388 dead transitions. [2024-06-21 20:05:06,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 388 transitions, 6101 flow [2024-06-21 20:05:06,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:06,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:06,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 20:05:06,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6107142857142858 [2024-06-21 20:05:06,673 INFO L175 Difference]: Start difference. First operand has 277 places, 363 transitions, 4967 flow. Second operand 7 states and 171 transitions. [2024-06-21 20:05:06,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 388 transitions, 6101 flow [2024-06-21 20:05:07,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 388 transitions, 5866 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:07,368 INFO L231 Difference]: Finished difference. Result has 278 places, 366 transitions, 5098 flow [2024-06-21 20:05:07,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4732, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5098, PETRI_PLACES=278, PETRI_TRANSITIONS=366} [2024-06-21 20:05:07,368 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 237 predicate places. [2024-06-21 20:05:07,368 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 366 transitions, 5098 flow [2024-06-21 20:05:07,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:07,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:07,369 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 20:05:07,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:05:07,369 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 20:05:07,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:07,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1720597101, now seen corresponding path program 8 times [2024-06-21 20:05:07,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:07,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110055854] [2024-06-21 20:05:07,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:07,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:07,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:07,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:07,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110055854] [2024-06-21 20:05:07,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110055854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:07,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:07,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:07,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111458724] [2024-06-21 20:05:07,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:07,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:07,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:07,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:07,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:07,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:07,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 366 transitions, 5098 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:07,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:07,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:07,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:08,180 INFO L124 PetriNetUnfolderBase]: 2596/4347 cut-off events. [2024-06-21 20:05:08,180 INFO L125 PetriNetUnfolderBase]: For 247914/247917 co-relation queries the response was YES. [2024-06-21 20:05:08,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28817 conditions, 4347 events. 2596/4347 cut-off events. For 247914/247917 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27651 event pairs, 588 based on Foata normal form. 3/4342 useless extension candidates. Maximal degree in co-relation 28687. Up to 3401 conditions per place. [2024-06-21 20:05:08,223 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 224 selfloop transitions, 157 changer transitions 0/388 dead transitions. [2024-06-21 20:05:08,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 388 transitions, 6234 flow [2024-06-21 20:05:08,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:08,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:08,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:05:08,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:05:08,224 INFO L175 Difference]: Start difference. First operand has 278 places, 366 transitions, 5098 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:05:08,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 388 transitions, 6234 flow [2024-06-21 20:05:08,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 388 transitions, 5846 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:05:08,896 INFO L231 Difference]: Finished difference. Result has 280 places, 369 transitions, 5082 flow [2024-06-21 20:05:08,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4722, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5082, PETRI_PLACES=280, PETRI_TRANSITIONS=369} [2024-06-21 20:05:08,896 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 20:05:08,896 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 369 transitions, 5082 flow [2024-06-21 20:05:08,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:08,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:08,897 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 20:05:08,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:05:08,897 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 20:05:08,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:08,897 INFO L85 PathProgramCache]: Analyzing trace with hash -503547387, now seen corresponding path program 9 times [2024-06-21 20:05:08,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:08,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810960007] [2024-06-21 20:05:08,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:08,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:08,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:08,974 INFO 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 20:05:08,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:08,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810960007] [2024-06-21 20:05:08,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810960007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:08,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:08,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:08,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639983795] [2024-06-21 20:05:08,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:08,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:08,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:08,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:08,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:09,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:09,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 369 transitions, 5082 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:09,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:09,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:09,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:09,768 INFO L124 PetriNetUnfolderBase]: 2590/4339 cut-off events. [2024-06-21 20:05:09,768 INFO L125 PetriNetUnfolderBase]: For 250865/250868 co-relation queries the response was YES. [2024-06-21 20:05:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28641 conditions, 4339 events. 2590/4339 cut-off events. For 250865/250868 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27623 event pairs, 588 based on Foata normal form. 4/4335 useless extension candidates. Maximal degree in co-relation 28510. Up to 3396 conditions per place. [2024-06-21 20:05:09,815 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 230 selfloop transitions, 148 changer transitions 0/385 dead transitions. [2024-06-21 20:05:09,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 385 transitions, 6156 flow [2024-06-21 20:05:09,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:05:09,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:05:09,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:05:09,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:05:09,817 INFO L175 Difference]: Start difference. First operand has 280 places, 369 transitions, 5082 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:05:09,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 385 transitions, 6156 flow [2024-06-21 20:05:10,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 385 transitions, 5856 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:10,540 INFO L231 Difference]: Finished difference. Result has 283 places, 369 transitions, 5085 flow [2024-06-21 20:05:10,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4782, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5085, PETRI_PLACES=283, PETRI_TRANSITIONS=369} [2024-06-21 20:05:10,541 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 242 predicate places. [2024-06-21 20:05:10,541 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 369 transitions, 5085 flow [2024-06-21 20:05:10,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:10,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:10,541 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 20:05:10,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:05:10,542 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 20:05:10,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:10,542 INFO L85 PathProgramCache]: Analyzing trace with hash -629975693, now seen corresponding path program 10 times [2024-06-21 20:05:10,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:10,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477946346] [2024-06-21 20:05:10,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:10,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:10,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:10,617 INFO 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 20:05:10,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477946346] [2024-06-21 20:05:10,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477946346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:10,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:10,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:10,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783379744] [2024-06-21 20:05:10,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:10,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:10,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:10,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:10,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:10,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:10,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 369 transitions, 5085 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:10,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:10,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:10,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:11,262 INFO L124 PetriNetUnfolderBase]: 2584/4331 cut-off events. [2024-06-21 20:05:11,263 INFO L125 PetriNetUnfolderBase]: For 252292/252295 co-relation queries the response was YES. [2024-06-21 20:05:11,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28530 conditions, 4331 events. 2584/4331 cut-off events. For 252292/252295 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27568 event pairs, 588 based on Foata normal form. 4/4327 useless extension candidates. Maximal degree in co-relation 28398. Up to 3466 conditions per place. [2024-06-21 20:05:11,312 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 251 selfloop transitions, 131 changer transitions 0/389 dead transitions. [2024-06-21 20:05:11,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 389 transitions, 6041 flow [2024-06-21 20:05:11,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:11,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:11,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 20:05:11,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-06-21 20:05:11,314 INFO L175 Difference]: Start difference. First operand has 283 places, 369 transitions, 5085 flow. Second operand 6 states and 152 transitions. [2024-06-21 20:05:11,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 389 transitions, 6041 flow [2024-06-21 20:05:12,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 389 transitions, 5736 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:12,230 INFO L231 Difference]: Finished difference. Result has 285 places, 369 transitions, 5054 flow [2024-06-21 20:05:12,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4780, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5054, PETRI_PLACES=285, PETRI_TRANSITIONS=369} [2024-06-21 20:05:12,230 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 244 predicate places. [2024-06-21 20:05:12,230 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 369 transitions, 5054 flow [2024-06-21 20:05:12,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:12,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:12,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:12,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:05:12,231 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 20:05:12,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:12,231 INFO L85 PathProgramCache]: Analyzing trace with hash -630183083, now seen corresponding path program 11 times [2024-06-21 20:05:12,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:12,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227499512] [2024-06-21 20:05:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:12,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:12,298 INFO 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 20:05:12,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:12,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227499512] [2024-06-21 20:05:12,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227499512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:12,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:12,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:12,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217346690] [2024-06-21 20:05:12,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:12,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:12,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:12,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:12,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:12,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 369 transitions, 5054 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:12,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:12,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:12,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:12,963 INFO L124 PetriNetUnfolderBase]: 2578/4312 cut-off events. [2024-06-21 20:05:12,964 INFO L125 PetriNetUnfolderBase]: For 251101/251104 co-relation queries the response was YES. [2024-06-21 20:05:13,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28343 conditions, 4312 events. 2578/4312 cut-off events. For 251101/251104 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27377 event pairs, 534 based on Foata normal form. 4/4305 useless extension candidates. Maximal degree in co-relation 28210. Up to 3461 conditions per place. [2024-06-21 20:05:13,013 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 216 selfloop transitions, 185 changer transitions 0/408 dead transitions. [2024-06-21 20:05:13,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 408 transitions, 6242 flow [2024-06-21 20:05:13,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:13,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:13,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 20:05:13,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-21 20:05:13,014 INFO L175 Difference]: Start difference. First operand has 285 places, 369 transitions, 5054 flow. Second operand 9 states and 232 transitions. [2024-06-21 20:05:13,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 408 transitions, 6242 flow [2024-06-21 20:05:13,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 408 transitions, 5917 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:13,737 INFO L231 Difference]: Finished difference. Result has 287 places, 369 transitions, 5122 flow [2024-06-21 20:05:13,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4733, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5122, PETRI_PLACES=287, PETRI_TRANSITIONS=369} [2024-06-21 20:05:13,737 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 246 predicate places. [2024-06-21 20:05:13,737 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 369 transitions, 5122 flow [2024-06-21 20:05:13,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:13,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:13,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:13,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:05:13,738 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 20:05:13,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:13,738 INFO L85 PathProgramCache]: Analyzing trace with hash 353302939, now seen corresponding path program 12 times [2024-06-21 20:05:13,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:13,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539639836] [2024-06-21 20:05:13,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:13,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:13,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:13,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:13,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539639836] [2024-06-21 20:05:13,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539639836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:13,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:13,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:13,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672134341] [2024-06-21 20:05:13,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:13,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:13,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:13,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:13,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:13,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:13,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 369 transitions, 5122 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:13,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:13,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:13,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:14,446 INFO L124 PetriNetUnfolderBase]: 2572/4304 cut-off events. [2024-06-21 20:05:14,446 INFO L125 PetriNetUnfolderBase]: For 245378/245381 co-relation queries the response was YES. [2024-06-21 20:05:14,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28291 conditions, 4304 events. 2572/4304 cut-off events. For 245378/245381 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27329 event pairs, 534 based on Foata normal form. 4/4297 useless extension candidates. Maximal degree in co-relation 28158. Up to 3456 conditions per place. [2024-06-21 20:05:14,493 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 226 selfloop transitions, 167 changer transitions 0/400 dead transitions. [2024-06-21 20:05:14,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 400 transitions, 6130 flow [2024-06-21 20:05:14,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:14,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:14,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:05:14,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-21 20:05:14,494 INFO L175 Difference]: Start difference. First operand has 287 places, 369 transitions, 5122 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:05:14,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 400 transitions, 6130 flow [2024-06-21 20:05:15,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 400 transitions, 5684 flow, removed 12 selfloop flow, removed 11 redundant places. [2024-06-21 20:05:15,116 INFO L231 Difference]: Finished difference. Result has 284 places, 369 transitions, 5036 flow [2024-06-21 20:05:15,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4682, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5036, PETRI_PLACES=284, PETRI_TRANSITIONS=369} [2024-06-21 20:05:15,116 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-21 20:05:15,116 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 369 transitions, 5036 flow [2024-06-21 20:05:15,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:15,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:15,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:15,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:05:15,117 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 20:05:15,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:15,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1042640653, now seen corresponding path program 2 times [2024-06-21 20:05:15,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:15,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820047435] [2024-06-21 20:05:15,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:15,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:15,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:15,202 INFO 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 20:05:15,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:15,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820047435] [2024-06-21 20:05:15,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820047435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:15,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:15,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:15,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460906642] [2024-06-21 20:05:15,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:15,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:15,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:15,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:15,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:15,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 369 transitions, 5036 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:15,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:15,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:15,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:16,007 INFO L124 PetriNetUnfolderBase]: 2546/4268 cut-off events. [2024-06-21 20:05:16,007 INFO L125 PetriNetUnfolderBase]: For 228412/228415 co-relation queries the response was YES. [2024-06-21 20:05:16,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27034 conditions, 4268 events. 2546/4268 cut-off events. For 228412/228415 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 26946 event pairs, 373 based on Foata normal form. 14/4271 useless extension candidates. Maximal degree in co-relation 26903. Up to 3275 conditions per place. [2024-06-21 20:05:16,047 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 303 selfloop transitions, 88 changer transitions 0/398 dead transitions. [2024-06-21 20:05:16,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 398 transitions, 6087 flow [2024-06-21 20:05:16,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:16,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-21 20:05:16,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:05:16,048 INFO L175 Difference]: Start difference. First operand has 284 places, 369 transitions, 5036 flow. Second operand 6 states and 156 transitions. [2024-06-21 20:05:16,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 398 transitions, 6087 flow [2024-06-21 20:05:16,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 398 transitions, 5643 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 20:05:16,700 INFO L231 Difference]: Finished difference. Result has 280 places, 371 transitions, 4861 flow [2024-06-21 20:05:16,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4596, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4861, PETRI_PLACES=280, PETRI_TRANSITIONS=371} [2024-06-21 20:05:16,701 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 239 predicate places. [2024-06-21 20:05:16,701 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 371 transitions, 4861 flow [2024-06-21 20:05:16,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:16,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:16,701 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 20:05:16,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:05:16,702 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 20:05:16,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:16,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1055585323, now seen corresponding path program 3 times [2024-06-21 20:05:16,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:16,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162177788] [2024-06-21 20:05:16,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:16,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:16,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:16,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162177788] [2024-06-21 20:05:16,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162177788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:16,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:16,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:05:16,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605823019] [2024-06-21 20:05:16,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:16,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:05:16,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:16,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:05:16,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:05:16,828 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:16,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 371 transitions, 4861 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:16,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:16,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:16,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:17,459 INFO L124 PetriNetUnfolderBase]: 2580/4339 cut-off events. [2024-06-21 20:05:17,460 INFO L125 PetriNetUnfolderBase]: For 219936/219939 co-relation queries the response was YES. [2024-06-21 20:05:17,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27088 conditions, 4339 events. 2580/4339 cut-off events. For 219936/219939 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 27537 event pairs, 464 based on Foata normal form. 14/4345 useless extension candidates. Maximal degree in co-relation 26957. Up to 2475 conditions per place. [2024-06-21 20:05:17,507 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 312 selfloop transitions, 80 changer transitions 0/399 dead transitions. [2024-06-21 20:05:17,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 399 transitions, 6071 flow [2024-06-21 20:05:17,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:05:17,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:05:17,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:05:17,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-21 20:05:17,510 INFO L175 Difference]: Start difference. First operand has 280 places, 371 transitions, 4861 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:05:17,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 399 transitions, 6071 flow [2024-06-21 20:05:18,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 399 transitions, 5917 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:05:18,243 INFO L231 Difference]: Finished difference. Result has 284 places, 374 transitions, 4954 flow [2024-06-21 20:05:18,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4707, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4954, PETRI_PLACES=284, PETRI_TRANSITIONS=374} [2024-06-21 20:05:18,244 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 243 predicate places. [2024-06-21 20:05:18,244 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 374 transitions, 4954 flow [2024-06-21 20:05:18,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:05:18,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:18,245 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 20:05:18,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:05:18,245 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 20:05:18,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:18,245 INFO L85 PathProgramCache]: Analyzing trace with hash 267633169, now seen corresponding path program 1 times [2024-06-21 20:05:18,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:18,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680206544] [2024-06-21 20:05:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:18,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:18,322 INFO 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 20:05:18,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:18,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680206544] [2024-06-21 20:05:18,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680206544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:18,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:18,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:18,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001237595] [2024-06-21 20:05:18,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:18,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:18,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:18,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:18,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:18,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:18,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 374 transitions, 4954 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:18,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:18,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:18,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:19,128 INFO L124 PetriNetUnfolderBase]: 3048/5115 cut-off events. [2024-06-21 20:05:19,128 INFO L125 PetriNetUnfolderBase]: For 446761/446761 co-relation queries the response was YES. [2024-06-21 20:05:19,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36131 conditions, 5115 events. 3048/5115 cut-off events. For 446761/446761 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 33454 event pairs, 638 based on Foata normal form. 36/5144 useless extension candidates. Maximal degree in co-relation 35998. Up to 2985 conditions per place. [2024-06-21 20:05:19,185 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 227 selfloop transitions, 189 changer transitions 0/423 dead transitions. [2024-06-21 20:05:19,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 423 transitions, 6592 flow [2024-06-21 20:05:19,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:19,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:19,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 20:05:19,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.653125 [2024-06-21 20:05:19,186 INFO L175 Difference]: Start difference. First operand has 284 places, 374 transitions, 4954 flow. Second operand 8 states and 209 transitions. [2024-06-21 20:05:19,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 423 transitions, 6592 flow [2024-06-21 20:05:20,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 423 transitions, 6394 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:20,359 INFO L231 Difference]: Finished difference. Result has 289 places, 379 transitions, 5331 flow [2024-06-21 20:05:20,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4756, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=185, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5331, PETRI_PLACES=289, PETRI_TRANSITIONS=379} [2024-06-21 20:05:20,359 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 248 predicate places. [2024-06-21 20:05:20,359 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 379 transitions, 5331 flow [2024-06-21 20:05:20,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:20,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:20,359 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 20:05:20,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:05:20,360 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 20:05:20,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:20,360 INFO L85 PathProgramCache]: Analyzing trace with hash -901581847, now seen corresponding path program 2 times [2024-06-21 20:05:20,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:20,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377376235] [2024-06-21 20:05:20,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:20,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:20,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:20,452 INFO 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 20:05:20,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:20,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377376235] [2024-06-21 20:05:20,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377376235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:20,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:20,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229334332] [2024-06-21 20:05:20,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:20,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:20,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:20,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:20,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 379 transitions, 5331 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:20,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:20,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:20,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:21,269 INFO L124 PetriNetUnfolderBase]: 3180/5347 cut-off events. [2024-06-21 20:05:21,269 INFO L125 PetriNetUnfolderBase]: For 481903/481903 co-relation queries the response was YES. [2024-06-21 20:05:21,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37322 conditions, 5347 events. 3180/5347 cut-off events. For 481903/481903 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 35295 event pairs, 890 based on Foata normal form. 42/5382 useless extension candidates. Maximal degree in co-relation 37189. Up to 4175 conditions per place. [2024-06-21 20:05:21,334 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 211 selfloop transitions, 185 changer transitions 3/406 dead transitions. [2024-06-21 20:05:21,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 406 transitions, 6421 flow [2024-06-21 20:05:21,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:21,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:21,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-21 20:05:21,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:05:21,335 INFO L175 Difference]: Start difference. First operand has 289 places, 379 transitions, 5331 flow. Second operand 8 states and 196 transitions. [2024-06-21 20:05:21,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 406 transitions, 6421 flow [2024-06-21 20:05:22,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 406 transitions, 6106 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-21 20:05:22,467 INFO L231 Difference]: Finished difference. Result has 294 places, 380 transitions, 5459 flow [2024-06-21 20:05:22,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5020, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5459, PETRI_PLACES=294, PETRI_TRANSITIONS=380} [2024-06-21 20:05:22,468 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 253 predicate places. [2024-06-21 20:05:22,468 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 380 transitions, 5459 flow [2024-06-21 20:05:22,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:22,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:22,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:22,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:05:22,468 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 20:05:22,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1244977199, now seen corresponding path program 3 times [2024-06-21 20:05:22,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:22,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057664037] [2024-06-21 20:05:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:22,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:22,550 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 20:05:22,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:22,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057664037] [2024-06-21 20:05:22,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057664037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:22,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:22,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:22,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959227229] [2024-06-21 20:05:22,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:22,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:22,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:22,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:22,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:22,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:22,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 380 transitions, 5459 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:22,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:22,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:22,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:23,619 INFO L124 PetriNetUnfolderBase]: 3412/5741 cut-off events. [2024-06-21 20:05:23,619 INFO L125 PetriNetUnfolderBase]: For 530710/530710 co-relation queries the response was YES. [2024-06-21 20:05:23,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41114 conditions, 5741 events. 3412/5741 cut-off events. For 530710/530710 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 38499 event pairs, 899 based on Foata normal form. 36/5770 useless extension candidates. Maximal degree in co-relation 40979. Up to 4177 conditions per place. [2024-06-21 20:05:23,683 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 226 selfloop transitions, 183 changer transitions 0/416 dead transitions. [2024-06-21 20:05:23,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 416 transitions, 6819 flow [2024-06-21 20:05:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:23,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 20:05:23,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.628125 [2024-06-21 20:05:23,684 INFO L175 Difference]: Start difference. First operand has 294 places, 380 transitions, 5459 flow. Second operand 8 states and 201 transitions. [2024-06-21 20:05:23,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 416 transitions, 6819 flow [2024-06-21 20:05:24,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 416 transitions, 6399 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:24,692 INFO L231 Difference]: Finished difference. Result has 297 places, 384 transitions, 5573 flow [2024-06-21 20:05:24,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5039, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5573, PETRI_PLACES=297, PETRI_TRANSITIONS=384} [2024-06-21 20:05:24,693 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 256 predicate places. [2024-06-21 20:05:24,693 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 384 transitions, 5573 flow [2024-06-21 20:05:24,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:24,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:24,693 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 20:05:24,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:05:24,694 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 20:05:24,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:24,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1960407975, now seen corresponding path program 4 times [2024-06-21 20:05:24,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:24,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837786158] [2024-06-21 20:05:24,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:24,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:24,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:24,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837786158] [2024-06-21 20:05:24,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837786158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:24,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:24,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:24,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529468680] [2024-06-21 20:05:24,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:24,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:24,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:24,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:24,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:24,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:24,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 384 transitions, 5573 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:24,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:24,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:24,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:25,966 INFO L124 PetriNetUnfolderBase]: 3544/5972 cut-off events. [2024-06-21 20:05:25,967 INFO L125 PetriNetUnfolderBase]: For 565503/565503 co-relation queries the response was YES. [2024-06-21 20:05:26,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42385 conditions, 5972 events. 3544/5972 cut-off events. For 565503/565503 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40510 event pairs, 992 based on Foata normal form. 42/6009 useless extension candidates. Maximal degree in co-relation 42248. Up to 5072 conditions per place. [2024-06-21 20:05:26,042 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 291 selfloop transitions, 108 changer transitions 3/409 dead transitions. [2024-06-21 20:05:26,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 409 transitions, 6525 flow [2024-06-21 20:05:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:26,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 230 transitions. [2024-06-21 20:05:26,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-06-21 20:05:26,043 INFO L175 Difference]: Start difference. First operand has 297 places, 384 transitions, 5573 flow. Second operand 10 states and 230 transitions. [2024-06-21 20:05:26,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 409 transitions, 6525 flow [2024-06-21 20:05:27,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 409 transitions, 6211 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:27,417 INFO L231 Difference]: Finished difference. Result has 303 places, 385 transitions, 5546 flow [2024-06-21 20:05:27,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5546, PETRI_PLACES=303, PETRI_TRANSITIONS=385} [2024-06-21 20:05:27,418 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-21 20:05:27,418 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 385 transitions, 5546 flow [2024-06-21 20:05:27,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:27,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:27,419 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 20:05:27,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:05:27,419 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 20:05:27,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:27,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1965770355, now seen corresponding path program 5 times [2024-06-21 20:05:27,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:27,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206808044] [2024-06-21 20:05:27,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:27,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:27,505 INFO 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 20:05:27,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206808044] [2024-06-21 20:05:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206808044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:27,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:27,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108088517] [2024-06-21 20:05:27,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:27,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:27,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:27,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:27,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 385 transitions, 5546 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:27,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:27,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:27,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:28,675 INFO L124 PetriNetUnfolderBase]: 3666/6198 cut-off events. [2024-06-21 20:05:28,675 INFO L125 PetriNetUnfolderBase]: For 578313/578313 co-relation queries the response was YES. [2024-06-21 20:05:28,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43351 conditions, 6198 events. 3666/6198 cut-off events. For 578313/578313 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 42480 event pairs, 1060 based on Foata normal form. 42/6235 useless extension candidates. Maximal degree in co-relation 43212. Up to 5274 conditions per place. [2024-06-21 20:05:28,740 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 297 selfloop transitions, 101 changer transitions 3/408 dead transitions. [2024-06-21 20:05:28,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 408 transitions, 6496 flow [2024-06-21 20:05:28,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:28,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:28,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:05:28,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:05:28,741 INFO L175 Difference]: Start difference. First operand has 303 places, 385 transitions, 5546 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:05:28,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 408 transitions, 6496 flow [2024-06-21 20:05:30,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 408 transitions, 6222 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:30,165 INFO L231 Difference]: Finished difference. Result has 303 places, 386 transitions, 5550 flow [2024-06-21 20:05:30,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5272, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5550, PETRI_PLACES=303, PETRI_TRANSITIONS=386} [2024-06-21 20:05:30,166 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 262 predicate places. [2024-06-21 20:05:30,166 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 386 transitions, 5550 flow [2024-06-21 20:05:30,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:30,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:30,167 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 20:05:30,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:05:30,167 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 20:05:30,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:30,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1965918225, now seen corresponding path program 6 times [2024-06-21 20:05:30,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:30,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101963937] [2024-06-21 20:05:30,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:30,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:30,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:30,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101963937] [2024-06-21 20:05:30,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101963937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:30,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:30,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188878809] [2024-06-21 20:05:30,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:30,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:30,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:30,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:30,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:30,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:30,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 386 transitions, 5550 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:30,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:30,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:30,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:31,370 INFO L124 PetriNetUnfolderBase]: 3898/6592 cut-off events. [2024-06-21 20:05:31,371 INFO L125 PetriNetUnfolderBase]: For 636808/636808 co-relation queries the response was YES. [2024-06-21 20:05:31,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47226 conditions, 6592 events. 3898/6592 cut-off events. For 636808/636808 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45752 event pairs, 1069 based on Foata normal form. 36/6623 useless extension candidates. Maximal degree in co-relation 47086. Up to 5072 conditions per place. [2024-06-21 20:05:31,451 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 311 selfloop transitions, 100 changer transitions 0/418 dead transitions. [2024-06-21 20:05:31,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 418 transitions, 6786 flow [2024-06-21 20:05:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:31,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:31,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-21 20:05:31,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.609375 [2024-06-21 20:05:31,452 INFO L175 Difference]: Start difference. First operand has 303 places, 386 transitions, 5550 flow. Second operand 8 states and 195 transitions. [2024-06-21 20:05:31,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 418 transitions, 6786 flow [2024-06-21 20:05:33,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 418 transitions, 6522 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:33,070 INFO L231 Difference]: Finished difference. Result has 306 places, 390 transitions, 5678 flow [2024-06-21 20:05:33,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5678, PETRI_PLACES=306, PETRI_TRANSITIONS=390} [2024-06-21 20:05:33,071 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 265 predicate places. [2024-06-21 20:05:33,071 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 390 transitions, 5678 flow [2024-06-21 20:05:33,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:33,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:33,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:33,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:05:33,072 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 20:05:33,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:33,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1960192773, now seen corresponding path program 1 times [2024-06-21 20:05:33,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:33,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254988446] [2024-06-21 20:05:33,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:33,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:33,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:33,167 INFO 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 20:05:33,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:33,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254988446] [2024-06-21 20:05:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254988446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:33,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:33,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537303740] [2024-06-21 20:05:33,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:33,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:33,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:33,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 390 transitions, 5678 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:33,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:33,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:33,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:34,395 INFO L124 PetriNetUnfolderBase]: 4006/6794 cut-off events. [2024-06-21 20:05:34,395 INFO L125 PetriNetUnfolderBase]: For 656547/656547 co-relation queries the response was YES. [2024-06-21 20:05:34,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48230 conditions, 6794 events. 4006/6794 cut-off events. For 656547/656547 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47606 event pairs, 1142 based on Foata normal form. 36/6825 useless extension candidates. Maximal degree in co-relation 48088. Up to 5444 conditions per place. [2024-06-21 20:05:34,474 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 295 selfloop transitions, 113 changer transitions 6/421 dead transitions. [2024-06-21 20:05:34,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 421 transitions, 6692 flow [2024-06-21 20:05:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:34,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:34,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-21 20:05:34,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-21 20:05:34,475 INFO L175 Difference]: Start difference. First operand has 306 places, 390 transitions, 5678 flow. Second operand 10 states and 233 transitions. [2024-06-21 20:05:34,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 421 transitions, 6692 flow [2024-06-21 20:05:36,348 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 421 transitions, 6477 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 20:05:36,353 INFO L231 Difference]: Finished difference. Result has 312 places, 391 transitions, 5759 flow [2024-06-21 20:05:36,353 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5759, PETRI_PLACES=312, PETRI_TRANSITIONS=391} [2024-06-21 20:05:36,353 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 271 predicate places. [2024-06-21 20:05:36,353 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 391 transitions, 5759 flow [2024-06-21 20:05:36,354 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:36,354 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:36,354 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 20:05:36,354 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:05:36,354 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 20:05:36,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash 524512861, now seen corresponding path program 7 times [2024-06-21 20:05:36,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:36,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111044861] [2024-06-21 20:05:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:36,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:36,441 INFO 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 20:05:36,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:36,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111044861] [2024-06-21 20:05:36,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111044861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:36,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:36,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:36,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935860742] [2024-06-21 20:05:36,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:36,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:36,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:36,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:36,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:36,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:36,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 391 transitions, 5759 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:36,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:36,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:36,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:37,616 INFO L124 PetriNetUnfolderBase]: 4108/6973 cut-off events. [2024-06-21 20:05:37,616 INFO L125 PetriNetUnfolderBase]: For 692252/692255 co-relation queries the response was YES. [2024-06-21 20:05:37,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49176 conditions, 6973 events. 4108/6973 cut-off events. For 692252/692255 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 49233 event pairs, 1267 based on Foata normal form. 44/7009 useless extension candidates. Maximal degree in co-relation 49032. Up to 5786 conditions per place. [2024-06-21 20:05:37,703 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 160 changer transitions 3/416 dead transitions. [2024-06-21 20:05:37,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 416 transitions, 6893 flow [2024-06-21 20:05:37,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:37,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:37,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-21 20:05:37,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:05:37,704 INFO L175 Difference]: Start difference. First operand has 312 places, 391 transitions, 5759 flow. Second operand 9 states and 210 transitions. [2024-06-21 20:05:37,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 416 transitions, 6893 flow [2024-06-21 20:05:39,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 416 transitions, 6596 flow, removed 37 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:39,617 INFO L231 Difference]: Finished difference. Result has 313 places, 392 transitions, 5872 flow [2024-06-21 20:05:39,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5462, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5872, PETRI_PLACES=313, PETRI_TRANSITIONS=392} [2024-06-21 20:05:39,617 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 272 predicate places. [2024-06-21 20:05:39,618 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 392 transitions, 5872 flow [2024-06-21 20:05:39,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:39,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:39,618 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 20:05:39,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:05:39,618 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 20:05:39,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:39,619 INFO L85 PathProgramCache]: Analyzing trace with hash 325211071, now seen corresponding path program 8 times [2024-06-21 20:05:39,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:39,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322443405] [2024-06-21 20:05:39,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:39,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:39,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:05:39,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:39,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322443405] [2024-06-21 20:05:39,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322443405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:39,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:39,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859400056] [2024-06-21 20:05:39,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:39,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:39,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 392 transitions, 5872 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:39,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:39,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:39,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:41,018 INFO L124 PetriNetUnfolderBase]: 4230/7164 cut-off events. [2024-06-21 20:05:41,018 INFO L125 PetriNetUnfolderBase]: For 713135/713135 co-relation queries the response was YES. [2024-06-21 20:05:41,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50426 conditions, 7164 events. 4230/7164 cut-off events. For 713135/713135 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 50680 event pairs, 1288 based on Foata normal form. 42/7201 useless extension candidates. Maximal degree in co-relation 50281. Up to 5804 conditions per place. [2024-06-21 20:05:41,106 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 244 selfloop transitions, 168 changer transitions 3/422 dead transitions. [2024-06-21 20:05:41,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 422 transitions, 7038 flow [2024-06-21 20:05:41,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:41,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:05:41,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:05:41,107 INFO L175 Difference]: Start difference. First operand has 313 places, 392 transitions, 5872 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:05:41,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 422 transitions, 7038 flow [2024-06-21 20:05:43,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 422 transitions, 6646 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:43,005 INFO L231 Difference]: Finished difference. Result has 314 places, 393 transitions, 5911 flow [2024-06-21 20:05:43,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5480, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5911, PETRI_PLACES=314, PETRI_TRANSITIONS=393} [2024-06-21 20:05:43,006 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 273 predicate places. [2024-06-21 20:05:43,006 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 393 transitions, 5911 flow [2024-06-21 20:05:43,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:43,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:43,006 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 20:05:43,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:05:43,006 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 20:05:43,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:43,006 INFO L85 PathProgramCache]: Analyzing trace with hash 330573451, now seen corresponding path program 9 times [2024-06-21 20:05:43,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:43,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631074398] [2024-06-21 20:05:43,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:43,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:43,103 INFO 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 20:05:43,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:43,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631074398] [2024-06-21 20:05:43,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631074398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:43,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:43,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396758857] [2024-06-21 20:05:43,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:43,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:43,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:43,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 393 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:43,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:43,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:43,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:44,389 INFO L124 PetriNetUnfolderBase]: 4339/7371 cut-off events. [2024-06-21 20:05:44,389 INFO L125 PetriNetUnfolderBase]: For 721747/721747 co-relation queries the response was YES. [2024-06-21 20:05:44,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51215 conditions, 7371 events. 4339/7371 cut-off events. For 721747/721747 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52629 event pairs, 1357 based on Foata normal form. 42/7408 useless extension candidates. Maximal degree in co-relation 51069. Up to 5987 conditions per place. [2024-06-21 20:05:44,681 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 236 selfloop transitions, 179 changer transitions 3/425 dead transitions. [2024-06-21 20:05:44,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 425 transitions, 7093 flow [2024-06-21 20:05:44,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:44,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 236 transitions. [2024-06-21 20:05:44,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59 [2024-06-21 20:05:44,683 INFO L175 Difference]: Start difference. First operand has 314 places, 393 transitions, 5911 flow. Second operand 10 states and 236 transitions. [2024-06-21 20:05:44,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 425 transitions, 7093 flow [2024-06-21 20:05:46,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 425 transitions, 6691 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 20:05:46,842 INFO L231 Difference]: Finished difference. Result has 318 places, 394 transitions, 5966 flow [2024-06-21 20:05:46,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5509, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5966, PETRI_PLACES=318, PETRI_TRANSITIONS=394} [2024-06-21 20:05:46,843 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 277 predicate places. [2024-06-21 20:05:46,843 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 394 transitions, 5966 flow [2024-06-21 20:05:46,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:46,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:46,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:46,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:05:46,844 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 20:05:46,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:46,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1967767855, now seen corresponding path program 10 times [2024-06-21 20:05:46,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:46,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446461245] [2024-06-21 20:05:46,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:46,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:46,931 INFO 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 20:05:46,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:46,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446461245] [2024-06-21 20:05:46,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446461245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:46,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:46,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:46,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17224212] [2024-06-21 20:05:46,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:46,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:46,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:46,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:46,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:46,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:46,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 394 transitions, 5966 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:46,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:46,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:46,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:48,191 INFO L124 PetriNetUnfolderBase]: 4433/7563 cut-off events. [2024-06-21 20:05:48,192 INFO L125 PetriNetUnfolderBase]: For 699638/699638 co-relation queries the response was YES. [2024-06-21 20:05:48,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51358 conditions, 7563 events. 4433/7563 cut-off events. For 699638/699638 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 54472 event pairs, 1095 based on Foata normal form. 36/7594 useless extension candidates. Maximal degree in co-relation 51211. Up to 4369 conditions per place. [2024-06-21 20:05:48,285 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 253 selfloop transitions, 175 changer transitions 0/435 dead transitions. [2024-06-21 20:05:48,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 435 transitions, 7406 flow [2024-06-21 20:05:48,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:05:48,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:05:48,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-21 20:05:48,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64375 [2024-06-21 20:05:48,286 INFO L175 Difference]: Start difference. First operand has 318 places, 394 transitions, 5966 flow. Second operand 8 states and 206 transitions. [2024-06-21 20:05:48,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 435 transitions, 7406 flow [2024-06-21 20:05:50,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 435 transitions, 6978 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:50,301 INFO L231 Difference]: Finished difference. Result has 319 places, 397 transitions, 6093 flow [2024-06-21 20:05:50,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6093, PETRI_PLACES=319, PETRI_TRANSITIONS=397} [2024-06-21 20:05:50,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 278 predicate places. [2024-06-21 20:05:50,302 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 397 transitions, 6093 flow [2024-06-21 20:05:50,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:50,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:50,302 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 20:05:50,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:05:50,302 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 20:05:50,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:50,303 INFO L85 PathProgramCache]: Analyzing trace with hash 330788653, now seen corresponding path program 2 times [2024-06-21 20:05:50,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:50,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661221406] [2024-06-21 20:05:50,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:50,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:50,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:50,392 INFO 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 20:05:50,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:50,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661221406] [2024-06-21 20:05:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661221406] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:50,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:50,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:50,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089313225] [2024-06-21 20:05:50,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:50,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:50,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:50,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:50,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:50,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:50,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 397 transitions, 6093 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:50,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:50,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:50,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:51,877 INFO L124 PetriNetUnfolderBase]: 4541/7765 cut-off events. [2024-06-21 20:05:51,877 INFO L125 PetriNetUnfolderBase]: For 717728/717728 co-relation queries the response was YES. [2024-06-21 20:05:51,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52616 conditions, 7765 events. 4541/7765 cut-off events. For 717728/717728 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 56181 event pairs, 1359 based on Foata normal form. 36/7796 useless extension candidates. Maximal degree in co-relation 52467. Up to 5585 conditions per place. [2024-06-21 20:05:51,976 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 230 selfloop transitions, 192 changer transitions 6/435 dead transitions. [2024-06-21 20:05:51,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 435 transitions, 7327 flow [2024-06-21 20:05:51,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:51,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:51,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 240 transitions. [2024-06-21 20:05:51,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:05:51,977 INFO L175 Difference]: Start difference. First operand has 319 places, 397 transitions, 6093 flow. Second operand 10 states and 240 transitions. [2024-06-21 20:05:51,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 435 transitions, 7327 flow [2024-06-21 20:05:54,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 435 transitions, 6761 flow, removed 57 selfloop flow, removed 7 redundant places. [2024-06-21 20:05:54,254 INFO L231 Difference]: Finished difference. Result has 322 places, 398 transitions, 6002 flow [2024-06-21 20:05:54,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6002, PETRI_PLACES=322, PETRI_TRANSITIONS=398} [2024-06-21 20:05:54,255 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 281 predicate places. [2024-06-21 20:05:54,255 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 398 transitions, 6002 flow [2024-06-21 20:05:54,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:54,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:54,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:05:54,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:05:54,256 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 20:05:54,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1064426461, now seen corresponding path program 3 times [2024-06-21 20:05:54,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:54,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795700207] [2024-06-21 20:05:54,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:54,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:54,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:54,360 INFO 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 20:05:54,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:54,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795700207] [2024-06-21 20:05:54,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795700207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:54,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:54,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:54,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176812547] [2024-06-21 20:05:54,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:54,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:54,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:54,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:54,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:54,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:54,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 398 transitions, 6002 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:54,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:54,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:54,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:55,697 INFO L124 PetriNetUnfolderBase]: 4619/7932 cut-off events. [2024-06-21 20:05:55,697 INFO L125 PetriNetUnfolderBase]: For 712822/712825 co-relation queries the response was YES. [2024-06-21 20:05:55,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52199 conditions, 7932 events. 4619/7932 cut-off events. For 712822/712825 co-relation queries the response was YES. Maximal size of possible extension queue 526. Compared 58129 event pairs, 1486 based on Foata normal form. 38/7962 useless extension candidates. Maximal degree in co-relation 52050. Up to 6449 conditions per place. [2024-06-21 20:05:56,020 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 256 selfloop transitions, 158 changer transitions 9/430 dead transitions. [2024-06-21 20:05:56,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 430 transitions, 7212 flow [2024-06-21 20:05:56,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:05:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:05:56,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-21 20:05:56,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5825 [2024-06-21 20:05:56,021 INFO L175 Difference]: Start difference. First operand has 322 places, 398 transitions, 6002 flow. Second operand 10 states and 233 transitions. [2024-06-21 20:05:56,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 430 transitions, 7212 flow [2024-06-21 20:05:58,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 430 transitions, 6742 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 20:05:58,239 INFO L231 Difference]: Finished difference. Result has 324 places, 396 transitions, 5911 flow [2024-06-21 20:05:58,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=324, PETRI_TRANSITIONS=396} [2024-06-21 20:05:58,240 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 283 predicate places. [2024-06-21 20:05:58,240 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 396 transitions, 5911 flow [2024-06-21 20:05:58,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:58,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:05:58,240 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 20:05:58,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:05:58,240 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 20:05:58,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:05:58,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1073623231, now seen corresponding path program 4 times [2024-06-21 20:05:58,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:05:58,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002363711] [2024-06-21 20:05:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:05:58,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:05:58,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:05:58,319 INFO 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 20:05:58,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:05:58,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002363711] [2024-06-21 20:05:58,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002363711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:05:58,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:05:58,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:05:58,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101957960] [2024-06-21 20:05:58,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:05:58,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:05:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:05:58,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:05:58,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:05:58,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:05:58,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 396 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:05:58,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:05:58,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:05:58,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:05:59,654 INFO L124 PetriNetUnfolderBase]: 4643/7962 cut-off events. [2024-06-21 20:05:59,654 INFO L125 PetriNetUnfolderBase]: For 773901/773904 co-relation queries the response was YES. [2024-06-21 20:05:59,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53270 conditions, 7962 events. 4643/7962 cut-off events. For 773901/773904 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 57924 event pairs, 1469 based on Foata normal form. 38/7992 useless extension candidates. Maximal degree in co-relation 53120. Up to 4741 conditions per place. [2024-06-21 20:05:59,754 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 246 selfloop transitions, 166 changer transitions 12/431 dead transitions. [2024-06-21 20:05:59,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 431 transitions, 7255 flow [2024-06-21 20:05:59,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:05:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:05:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 218 transitions. [2024-06-21 20:05:59,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6055555555555555 [2024-06-21 20:05:59,755 INFO L175 Difference]: Start difference. First operand has 324 places, 396 transitions, 5911 flow. Second operand 9 states and 218 transitions. [2024-06-21 20:05:59,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 431 transitions, 7255 flow [2024-06-21 20:06:02,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 431 transitions, 6854 flow, removed 44 selfloop flow, removed 8 redundant places. [2024-06-21 20:06:02,429 INFO L231 Difference]: Finished difference. Result has 325 places, 391 transitions, 5839 flow [2024-06-21 20:06:02,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5510, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5839, PETRI_PLACES=325, PETRI_TRANSITIONS=391} [2024-06-21 20:06:02,430 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 284 predicate places. [2024-06-21 20:06:02,430 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 391 transitions, 5839 flow [2024-06-21 20:06:02,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:06:02,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:02,430 INFO 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 20:06:02,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:06:02,430 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 20:06:02,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:02,430 INFO L85 PathProgramCache]: Analyzing trace with hash -666984972, now seen corresponding path program 1 times [2024-06-21 20:06:02,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:02,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728100457] [2024-06-21 20:06:02,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:02,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:02,505 INFO 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 20:06:02,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:02,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728100457] [2024-06-21 20:06:02,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728100457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:02,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:02,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:02,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639360444] [2024-06-21 20:06:02,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:02,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:02,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:02,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:02,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:02,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:02,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 391 transitions, 5839 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:06:02,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:02,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:02,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:03,968 INFO L124 PetriNetUnfolderBase]: 4511/7646 cut-off events. [2024-06-21 20:06:03,968 INFO L125 PetriNetUnfolderBase]: For 727488/727488 co-relation queries the response was YES. [2024-06-21 20:06:04,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53665 conditions, 7646 events. 4511/7646 cut-off events. For 727488/727488 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55260 event pairs, 1335 based on Foata normal form. 10/7581 useless extension candidates. Maximal degree in co-relation 53514. Up to 6017 conditions per place. [2024-06-21 20:06:04,061 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 238 selfloop transitions, 189 changer transitions 4/438 dead transitions. [2024-06-21 20:06:04,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 438 transitions, 7414 flow [2024-06-21 20:06:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:04,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:04,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 20:06:04,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-06-21 20:06:04,062 INFO L175 Difference]: Start difference. First operand has 325 places, 391 transitions, 5839 flow. Second operand 8 states and 208 transitions. [2024-06-21 20:06:04,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 438 transitions, 7414 flow [2024-06-21 20:06:06,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 438 transitions, 6905 flow, removed 46 selfloop flow, removed 8 redundant places. [2024-06-21 20:06:06,280 INFO L231 Difference]: Finished difference. Result has 326 places, 398 transitions, 5986 flow [2024-06-21 20:06:06,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5330, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=391, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5986, PETRI_PLACES=326, PETRI_TRANSITIONS=398} [2024-06-21 20:06:06,280 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 285 predicate places. [2024-06-21 20:06:06,280 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 398 transitions, 5986 flow [2024-06-21 20:06:06,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:06:06,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:06,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:06,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:06:06,281 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 20:06:06,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:06,281 INFO L85 PathProgramCache]: Analyzing trace with hash -274175850, now seen corresponding path program 2 times [2024-06-21 20:06:06,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:06,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038014072] [2024-06-21 20:06:06,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:06,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:06,358 INFO 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 20:06:06,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:06,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038014072] [2024-06-21 20:06:06,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038014072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:06,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:06,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:06,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489399270] [2024-06-21 20:06:06,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:06,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:06,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:06,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:06,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 398 transitions, 5986 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:06:06,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:06,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:06,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:07,575 INFO L124 PetriNetUnfolderBase]: 4289/7315 cut-off events. [2024-06-21 20:06:07,575 INFO L125 PetriNetUnfolderBase]: For 615458/615458 co-relation queries the response was YES. [2024-06-21 20:06:07,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49009 conditions, 7315 events. 4289/7315 cut-off events. For 615458/615458 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 52449 event pairs, 1348 based on Foata normal form. 10/7299 useless extension candidates. Maximal degree in co-relation 48857. Up to 6225 conditions per place. [2024-06-21 20:06:07,671 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 181 changer transitions 4/427 dead transitions. [2024-06-21 20:06:07,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 427 transitions, 7076 flow [2024-06-21 20:06:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-21 20:06:07,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.621875 [2024-06-21 20:06:07,672 INFO L175 Difference]: Start difference. First operand has 326 places, 398 transitions, 5986 flow. Second operand 8 states and 199 transitions. [2024-06-21 20:06:07,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 427 transitions, 7076 flow [2024-06-21 20:06:10,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 427 transitions, 6651 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:10,088 INFO L231 Difference]: Finished difference. Result has 329 places, 397 transitions, 5922 flow [2024-06-21 20:06:10,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5567, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5922, PETRI_PLACES=329, PETRI_TRANSITIONS=397} [2024-06-21 20:06:10,089 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 288 predicate places. [2024-06-21 20:06:10,089 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 397 transitions, 5922 flow [2024-06-21 20:06:10,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:06:10,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:10,089 INFO 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 20:06:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:06:10,089 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 20:06:10,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:10,089 INFO L85 PathProgramCache]: Analyzing trace with hash -158884680, now seen corresponding path program 3 times [2024-06-21 20:06:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:10,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179693209] [2024-06-21 20:06:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:10,182 INFO 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 20:06:10,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:10,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179693209] [2024-06-21 20:06:10,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179693209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:10,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:10,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:06:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628392372] [2024-06-21 20:06:10,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:10,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:06:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:10,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:06:10,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:06:10,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:10,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 397 transitions, 5922 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:06:10,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:10,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:10,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:11,428 INFO L124 PetriNetUnfolderBase]: 4214/7186 cut-off events. [2024-06-21 20:06:11,428 INFO L125 PetriNetUnfolderBase]: For 553634/553637 co-relation queries the response was YES. [2024-06-21 20:06:11,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46940 conditions, 7186 events. 4214/7186 cut-off events. For 553634/553637 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 51317 event pairs, 1286 based on Foata normal form. 12/7181 useless extension candidates. Maximal degree in co-relation 46787. Up to 6438 conditions per place. [2024-06-21 20:06:11,517 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 329 selfloop transitions, 82 changer transitions 4/422 dead transitions. [2024-06-21 20:06:11,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 422 transitions, 6826 flow [2024-06-21 20:06:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:11,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:11,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:06:11,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 20:06:11,518 INFO L175 Difference]: Start difference. First operand has 329 places, 397 transitions, 5922 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:06:11,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 422 transitions, 6826 flow [2024-06-21 20:06:14,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 422 transitions, 6419 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:14,232 INFO L231 Difference]: Finished difference. Result has 331 places, 396 transitions, 5667 flow [2024-06-21 20:06:14,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5667, PETRI_PLACES=331, PETRI_TRANSITIONS=396} [2024-06-21 20:06:14,233 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 290 predicate places. [2024-06-21 20:06:14,233 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 396 transitions, 5667 flow [2024-06-21 20:06:14,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:06:14,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:14,233 INFO 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 20:06:14,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:06:14,234 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 20:06:14,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash -283436883, now seen corresponding path program 1 times [2024-06-21 20:06:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595269439] [2024-06-21 20:06:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:14,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:14,313 INFO 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 20:06:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:14,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595269439] [2024-06-21 20:06:14,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595269439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:14,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:14,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:14,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356530146] [2024-06-21 20:06:14,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:14,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:14,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:14,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:14,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:14,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 396 transitions, 5667 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:14,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:14,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:14,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:15,499 INFO L124 PetriNetUnfolderBase]: 4205/7196 cut-off events. [2024-06-21 20:06:15,500 INFO L125 PetriNetUnfolderBase]: For 542570/542573 co-relation queries the response was YES. [2024-06-21 20:06:15,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46689 conditions, 7196 events. 4205/7196 cut-off events. For 542570/542573 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51556 event pairs, 1342 based on Foata normal form. 3/7191 useless extension candidates. Maximal degree in co-relation 46535. Up to 6116 conditions per place. [2024-06-21 20:06:15,587 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 259 selfloop transitions, 158 changer transitions 0/424 dead transitions. [2024-06-21 20:06:15,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 424 transitions, 6960 flow [2024-06-21 20:06:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:15,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:06:15,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:06:15,588 INFO L175 Difference]: Start difference. First operand has 331 places, 396 transitions, 5667 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:06:15,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 424 transitions, 6960 flow [2024-06-21 20:06:18,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 424 transitions, 6747 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:18,136 INFO L231 Difference]: Finished difference. Result has 332 places, 405 transitions, 5862 flow [2024-06-21 20:06:18,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5454, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5862, PETRI_PLACES=332, PETRI_TRANSITIONS=405} [2024-06-21 20:06:18,136 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 291 predicate places. [2024-06-21 20:06:18,136 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 405 transitions, 5862 flow [2024-06-21 20:06:18,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:18,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:18,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:18,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:06:18,137 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 20:06:18,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:18,137 INFO L85 PathProgramCache]: Analyzing trace with hash -839622825, now seen corresponding path program 2 times [2024-06-21 20:06:18,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:18,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602032982] [2024-06-21 20:06:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:18,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:18,203 INFO 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 20:06:18,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:18,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602032982] [2024-06-21 20:06:18,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602032982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:18,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:18,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:18,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238336540] [2024-06-21 20:06:18,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:18,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:18,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:18,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:18,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:18,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:18,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 405 transitions, 5862 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:18,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:18,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:18,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:19,372 INFO L124 PetriNetUnfolderBase]: 4202/7194 cut-off events. [2024-06-21 20:06:19,372 INFO L125 PetriNetUnfolderBase]: For 549025/549030 co-relation queries the response was YES. [2024-06-21 20:06:19,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46798 conditions, 7194 events. 4202/7194 cut-off events. For 549025/549030 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51573 event pairs, 1388 based on Foata normal form. 5/7191 useless extension candidates. Maximal degree in co-relation 46643. Up to 6113 conditions per place. [2024-06-21 20:06:19,462 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 260 selfloop transitions, 160 changer transitions 0/427 dead transitions. [2024-06-21 20:06:19,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 427 transitions, 7088 flow [2024-06-21 20:06:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:19,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-21 20:06:19,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 20:06:19,463 INFO L175 Difference]: Start difference. First operand has 332 places, 405 transitions, 5862 flow. Second operand 7 states and 170 transitions. [2024-06-21 20:06:19,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 427 transitions, 7088 flow [2024-06-21 20:06:21,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 427 transitions, 6917 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-21 20:06:21,871 INFO L231 Difference]: Finished difference. Result has 336 places, 405 transitions, 6017 flow [2024-06-21 20:06:21,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6017, PETRI_PLACES=336, PETRI_TRANSITIONS=405} [2024-06-21 20:06:21,871 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 295 predicate places. [2024-06-21 20:06:21,872 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 405 transitions, 6017 flow [2024-06-21 20:06:21,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:21,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:21,872 INFO 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 20:06:21,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:06:21,872 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 20:06:21,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash -664123455, now seen corresponding path program 3 times [2024-06-21 20:06:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:21,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207567768] [2024-06-21 20:06:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:21,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:21,933 INFO 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 20:06:21,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:21,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207567768] [2024-06-21 20:06:21,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207567768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:21,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:21,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:21,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013860155] [2024-06-21 20:06:21,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:21,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:21,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:21,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:21,962 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:21,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 405 transitions, 6017 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:21,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:21,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:21,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:23,112 INFO L124 PetriNetUnfolderBase]: 4207/7201 cut-off events. [2024-06-21 20:06:23,112 INFO L125 PetriNetUnfolderBase]: For 563229/563232 co-relation queries the response was YES. [2024-06-21 20:06:23,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47116 conditions, 7201 events. 4207/7201 cut-off events. For 563229/563232 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51627 event pairs, 1345 based on Foata normal form. 3/7196 useless extension candidates. Maximal degree in co-relation 46960. Up to 6119 conditions per place. [2024-06-21 20:06:23,208 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 261 selfloop transitions, 156 changer transitions 0/424 dead transitions. [2024-06-21 20:06:23,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 424 transitions, 7260 flow [2024-06-21 20:06:23,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:23,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:23,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-21 20:06:23,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2024-06-21 20:06:23,209 INFO L175 Difference]: Start difference. First operand has 336 places, 405 transitions, 6017 flow. Second operand 7 states and 166 transitions. [2024-06-21 20:06:23,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 424 transitions, 7260 flow [2024-06-21 20:06:26,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 424 transitions, 6748 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:26,362 INFO L231 Difference]: Finished difference. Result has 337 places, 408 transitions, 5858 flow [2024-06-21 20:06:26,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5514, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5858, PETRI_PLACES=337, PETRI_TRANSITIONS=408} [2024-06-21 20:06:26,362 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 20:06:26,362 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 408 transitions, 5858 flow [2024-06-21 20:06:26,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:26,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:26,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:26,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:06:26,362 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 20:06:26,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:26,363 INFO L85 PathProgramCache]: Analyzing trace with hash -664134615, now seen corresponding path program 4 times [2024-06-21 20:06:26,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:26,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409474503] [2024-06-21 20:06:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:26,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:26,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:26,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409474503] [2024-06-21 20:06:26,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409474503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:26,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:26,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:26,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217141785] [2024-06-21 20:06:26,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:26,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:26,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:26,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:26,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:26,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:26,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 408 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:26,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:26,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:26,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:27,598 INFO L124 PetriNetUnfolderBase]: 4204/7197 cut-off events. [2024-06-21 20:06:27,598 INFO L125 PetriNetUnfolderBase]: For 567776/567779 co-relation queries the response was YES. [2024-06-21 20:06:27,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46977 conditions, 7197 events. 4204/7197 cut-off events. For 567776/567779 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51599 event pairs, 1355 based on Foata normal form. 3/7192 useless extension candidates. Maximal degree in co-relation 46821. Up to 6116 conditions per place. [2024-06-21 20:06:27,690 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 265 selfloop transitions, 151 changer transitions 0/423 dead transitions. [2024-06-21 20:06:27,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 423 transitions, 6896 flow [2024-06-21 20:06:27,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:27,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:27,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:06:27,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:06:27,692 INFO L175 Difference]: Start difference. First operand has 337 places, 408 transitions, 5858 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:06:27,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 423 transitions, 6896 flow [2024-06-21 20:06:30,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 423 transitions, 6360 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:30,901 INFO L231 Difference]: Finished difference. Result has 337 places, 408 transitions, 5632 flow [2024-06-21 20:06:30,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5632, PETRI_PLACES=337, PETRI_TRANSITIONS=408} [2024-06-21 20:06:30,902 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 296 predicate places. [2024-06-21 20:06:30,902 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 408 transitions, 5632 flow [2024-06-21 20:06:30,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:30,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:30,902 INFO 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 20:06:30,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:06:30,902 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 20:06:30,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:30,902 INFO L85 PathProgramCache]: Analyzing trace with hash -563004397, now seen corresponding path program 5 times [2024-06-21 20:06:30,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:30,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576511437] [2024-06-21 20:06:30,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:30,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576511437] [2024-06-21 20:06:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576511437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:30,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:30,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:30,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827039422] [2024-06-21 20:06:30,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:30,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:30,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:30,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:30,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:31,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:31,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 408 transitions, 5632 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:31,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:31,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:31,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:32,158 INFO L124 PetriNetUnfolderBase]: 4217/7222 cut-off events. [2024-06-21 20:06:32,159 INFO L125 PetriNetUnfolderBase]: For 582340/582348 co-relation queries the response was YES. [2024-06-21 20:06:32,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47103 conditions, 7222 events. 4217/7222 cut-off events. For 582340/582348 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51815 event pairs, 1323 based on Foata normal form. 7/7223 useless extension candidates. Maximal degree in co-relation 46947. Up to 6472 conditions per place. [2024-06-21 20:06:32,251 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 353 selfloop transitions, 74 changer transitions 0/434 dead transitions. [2024-06-21 20:06:32,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 434 transitions, 6764 flow [2024-06-21 20:06:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:32,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:32,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-21 20:06:32,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5527777777777778 [2024-06-21 20:06:32,252 INFO L175 Difference]: Start difference. First operand has 337 places, 408 transitions, 5632 flow. Second operand 9 states and 199 transitions. [2024-06-21 20:06:32,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 434 transitions, 6764 flow [2024-06-21 20:06:34,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 434 transitions, 6432 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:34,723 INFO L231 Difference]: Finished difference. Result has 340 places, 414 transitions, 5518 flow [2024-06-21 20:06:34,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5312, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5518, PETRI_PLACES=340, PETRI_TRANSITIONS=414} [2024-06-21 20:06:34,724 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 299 predicate places. [2024-06-21 20:06:34,724 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 414 transitions, 5518 flow [2024-06-21 20:06:34,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:34,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:34,724 INFO 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 20:06:34,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:06:34,724 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 20:06:34,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:34,724 INFO L85 PathProgramCache]: Analyzing trace with hash -835903755, now seen corresponding path program 6 times [2024-06-21 20:06:34,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:34,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473361440] [2024-06-21 20:06:34,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:34,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:34,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:34,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473361440] [2024-06-21 20:06:34,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473361440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:34,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143070099] [2024-06-21 20:06:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:34,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:34,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:34,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:34,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 414 transitions, 5518 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:34,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:34,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:34,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:35,997 INFO L124 PetriNetUnfolderBase]: 4214/7218 cut-off events. [2024-06-21 20:06:35,998 INFO L125 PetriNetUnfolderBase]: For 589601/589609 co-relation queries the response was YES. [2024-06-21 20:06:36,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46869 conditions, 7218 events. 4214/7218 cut-off events. For 589601/589609 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 51793 event pairs, 1323 based on Foata normal form. 7/7219 useless extension candidates. Maximal degree in co-relation 46712. Up to 6469 conditions per place. [2024-06-21 20:06:36,089 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 351 selfloop transitions, 73 changer transitions 0/431 dead transitions. [2024-06-21 20:06:36,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 431 transitions, 6408 flow [2024-06-21 20:06:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:06:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:06:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-21 20:06:36,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5857142857142857 [2024-06-21 20:06:36,090 INFO L175 Difference]: Start difference. First operand has 340 places, 414 transitions, 5518 flow. Second operand 7 states and 164 transitions. [2024-06-21 20:06:36,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 431 transitions, 6408 flow [2024-06-21 20:06:38,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 431 transitions, 6315 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:38,741 INFO L231 Difference]: Finished difference. Result has 342 places, 414 transitions, 5577 flow [2024-06-21 20:06:38,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5577, PETRI_PLACES=342, PETRI_TRANSITIONS=414} [2024-06-21 20:06:38,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 301 predicate places. [2024-06-21 20:06:38,742 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 414 transitions, 5577 flow [2024-06-21 20:06:38,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:38,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:38,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:38,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:06:38,743 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 20:06:38,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:38,743 INFO L85 PathProgramCache]: Analyzing trace with hash 444229313, now seen corresponding path program 7 times [2024-06-21 20:06:38,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:38,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203663568] [2024-06-21 20:06:38,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:38,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:38,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:06:38,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:38,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203663568] [2024-06-21 20:06:38,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203663568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:38,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:38,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:38,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422197451] [2024-06-21 20:06:38,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:38,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:38,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:38,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:38,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 414 transitions, 5577 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:38,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:38,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:38,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:40,039 INFO L124 PetriNetUnfolderBase]: 4235/7253 cut-off events. [2024-06-21 20:06:40,039 INFO L125 PetriNetUnfolderBase]: For 608460/608468 co-relation queries the response was YES. [2024-06-21 20:06:40,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47517 conditions, 7253 events. 4235/7253 cut-off events. For 608460/608468 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52088 event pairs, 1331 based on Foata normal form. 7/7254 useless extension candidates. Maximal degree in co-relation 47358. Up to 6229 conditions per place. [2024-06-21 20:06:40,136 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 275 selfloop transitions, 168 changer transitions 0/450 dead transitions. [2024-06-21 20:06:40,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 450 transitions, 6962 flow [2024-06-21 20:06:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:06:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:06:40,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-21 20:06:40,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5861111111111111 [2024-06-21 20:06:40,137 INFO L175 Difference]: Start difference. First operand has 342 places, 414 transitions, 5577 flow. Second operand 9 states and 211 transitions. [2024-06-21 20:06:40,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 450 transitions, 6962 flow [2024-06-21 20:06:43,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 450 transitions, 6816 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 20:06:43,761 INFO L231 Difference]: Finished difference. Result has 345 places, 423 transitions, 5858 flow [2024-06-21 20:06:43,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5431, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=414, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5858, PETRI_PLACES=345, PETRI_TRANSITIONS=423} [2024-06-21 20:06:43,761 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 304 predicate places. [2024-06-21 20:06:43,761 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 423 transitions, 5858 flow [2024-06-21 20:06:43,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:43,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:43,762 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] [2024-06-21 20:06:43,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:06:43,762 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 20:06:43,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 444580853, now seen corresponding path program 8 times [2024-06-21 20:06:43,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:43,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995637369] [2024-06-21 20:06:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:43,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:43,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:43,830 INFO 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 20:06:43,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:43,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995637369] [2024-06-21 20:06:43,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995637369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:43,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:43,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:43,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119227779] [2024-06-21 20:06:43,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:43,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:43,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:43,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:43,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:43,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:43,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 423 transitions, 5858 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:43,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:43,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:43,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:45,053 INFO L124 PetriNetUnfolderBase]: 4240/7259 cut-off events. [2024-06-21 20:06:45,054 INFO L125 PetriNetUnfolderBase]: For 623630/623633 co-relation queries the response was YES. [2024-06-21 20:06:45,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48037 conditions, 7259 events. 4240/7259 cut-off events. For 623630/623633 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52130 event pairs, 1332 based on Foata normal form. 3/7254 useless extension candidates. Maximal degree in co-relation 47877. Up to 6235 conditions per place. [2024-06-21 20:06:45,147 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 266 selfloop transitions, 170 changer transitions 0/443 dead transitions. [2024-06-21 20:06:45,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 443 transitions, 7155 flow [2024-06-21 20:06:45,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:45,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:06:45,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:06:45,148 INFO L175 Difference]: Start difference. First operand has 345 places, 423 transitions, 5858 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:06:45,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 443 transitions, 7155 flow [2024-06-21 20:06:48,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 443 transitions, 6813 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:06:48,648 INFO L231 Difference]: Finished difference. Result has 346 places, 426 transitions, 5897 flow [2024-06-21 20:06:48,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5526, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5897, PETRI_PLACES=346, PETRI_TRANSITIONS=426} [2024-06-21 20:06:48,649 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 305 predicate places. [2024-06-21 20:06:48,649 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 426 transitions, 5897 flow [2024-06-21 20:06:48,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:48,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:48,649 INFO 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 20:06:48,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:06:48,650 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 20:06:48,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:48,650 INFO L85 PathProgramCache]: Analyzing trace with hash 444407873, now seen corresponding path program 9 times [2024-06-21 20:06:48,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:48,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769689777] [2024-06-21 20:06:48,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:48,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:48,716 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 20:06:48,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:48,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769689777] [2024-06-21 20:06:48,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769689777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:48,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:48,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:48,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662656071] [2024-06-21 20:06:48,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:48,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:48,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:48,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:48,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:48,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:48,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 426 transitions, 5897 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:48,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:48,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:48,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:49,901 INFO L124 PetriNetUnfolderBase]: 4237/7255 cut-off events. [2024-06-21 20:06:49,902 INFO L125 PetriNetUnfolderBase]: For 620129/620132 co-relation queries the response was YES. [2024-06-21 20:06:49,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47906 conditions, 7255 events. 4237/7255 cut-off events. For 620129/620132 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52104 event pairs, 1345 based on Foata normal form. 3/7250 useless extension candidates. Maximal degree in co-relation 47746. Up to 6232 conditions per place. [2024-06-21 20:06:49,996 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 286 selfloop transitions, 148 changer transitions 0/441 dead transitions. [2024-06-21 20:06:49,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 441 transitions, 7157 flow [2024-06-21 20:06:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:06:49,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:06:49,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-21 20:06:49,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2024-06-21 20:06:49,997 INFO L175 Difference]: Start difference. First operand has 346 places, 426 transitions, 5897 flow. Second operand 6 states and 145 transitions. [2024-06-21 20:06:49,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 441 transitions, 7157 flow [2024-06-21 20:06:53,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 441 transitions, 6882 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-21 20:06:53,036 INFO L231 Difference]: Finished difference. Result has 348 places, 426 transitions, 5925 flow [2024-06-21 20:06:53,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5622, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5925, PETRI_PLACES=348, PETRI_TRANSITIONS=426} [2024-06-21 20:06:53,037 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 307 predicate places. [2024-06-21 20:06:53,037 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 426 transitions, 5925 flow [2024-06-21 20:06:53,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:53,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:53,037 INFO 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 20:06:53,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:06:53,037 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 20:06:53,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash 444223733, now seen corresponding path program 10 times [2024-06-21 20:06:53,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:53,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460106692] [2024-06-21 20:06:53,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:53,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:53,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:53,103 INFO 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 20:06:53,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:53,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460106692] [2024-06-21 20:06:53,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460106692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:53,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:53,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:53,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029566811] [2024-06-21 20:06:53,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:53,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:53,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:53,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:53,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:53,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:53,135 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 426 transitions, 5925 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:53,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:53,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:53,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:54,346 INFO L124 PetriNetUnfolderBase]: 4234/7254 cut-off events. [2024-06-21 20:06:54,347 INFO L125 PetriNetUnfolderBase]: For 628935/628943 co-relation queries the response was YES. [2024-06-21 20:06:54,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47954 conditions, 7254 events. 4234/7254 cut-off events. For 628935/628943 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52061 event pairs, 1321 based on Foata normal form. 7/7255 useless extension candidates. Maximal degree in co-relation 47793. Up to 6229 conditions per place. [2024-06-21 20:06:54,441 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 283 selfloop transitions, 165 changer transitions 0/455 dead transitions. [2024-06-21 20:06:54,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 455 transitions, 7253 flow [2024-06-21 20:06:54,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:06:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:06:54,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:06:54,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:06:54,443 INFO L175 Difference]: Start difference. First operand has 348 places, 426 transitions, 5925 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:06:54,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 455 transitions, 7253 flow [2024-06-21 20:06:57,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 455 transitions, 6926 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-21 20:06:57,345 INFO L231 Difference]: Finished difference. Result has 351 places, 426 transitions, 5939 flow [2024-06-21 20:06:57,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5939, PETRI_PLACES=351, PETRI_TRANSITIONS=426} [2024-06-21 20:06:57,346 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-21 20:06:57,346 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 426 transitions, 5939 flow [2024-06-21 20:06:57,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:57,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:06:57,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:06:57,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:06:57,346 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 20:06:57,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:06:57,347 INFO L85 PathProgramCache]: Analyzing trace with hash 444396713, now seen corresponding path program 11 times [2024-06-21 20:06:57,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:06:57,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088784858] [2024-06-21 20:06:57,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:06:57,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:06:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:06:57,423 INFO 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 20:06:57,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:06:57,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088784858] [2024-06-21 20:06:57,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088784858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:06:57,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:06:57,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:06:57,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213011580] [2024-06-21 20:06:57,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:06:57,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:06:57,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:06:57,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:06:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:06:57,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:06:57,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 426 transitions, 5939 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:06:57,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:06:57,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:06:57,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:06:58,842 INFO L124 PetriNetUnfolderBase]: 4231/7247 cut-off events. [2024-06-21 20:06:58,842 INFO L125 PetriNetUnfolderBase]: For 637592/637595 co-relation queries the response was YES. [2024-06-21 20:06:58,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48031 conditions, 7247 events. 4231/7247 cut-off events. For 637592/637595 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 52063 event pairs, 1345 based on Foata normal form. 3/7242 useless extension candidates. Maximal degree in co-relation 47869. Up to 6226 conditions per place. [2024-06-21 20:06:58,923 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 289 selfloop transitions, 147 changer transitions 0/443 dead transitions. [2024-06-21 20:06:58,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 443 transitions, 7035 flow [2024-06-21 20:06:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:06:58,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:06:58,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-21 20:06:58,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-06-21 20:06:58,925 INFO L175 Difference]: Start difference. First operand has 351 places, 426 transitions, 5939 flow. Second operand 6 states and 147 transitions. [2024-06-21 20:06:58,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 443 transitions, 7035 flow [2024-06-21 20:07:02,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 443 transitions, 6681 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 20:07:02,308 INFO L231 Difference]: Finished difference. Result has 350 places, 426 transitions, 5889 flow [2024-06-21 20:07:02,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5889, PETRI_PLACES=350, PETRI_TRANSITIONS=426} [2024-06-21 20:07:02,308 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 309 predicate places. [2024-06-21 20:07:02,308 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 426 transitions, 5889 flow [2024-06-21 20:07:02,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:02,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:02,309 INFO 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 20:07:02,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:07:02,309 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 20:07:02,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:02,309 INFO L85 PathProgramCache]: Analyzing trace with hash 444575273, now seen corresponding path program 12 times [2024-06-21 20:07:02,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:02,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525060228] [2024-06-21 20:07:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:02,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:02,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:02,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525060228] [2024-06-21 20:07:02,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525060228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:02,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:02,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:07:02,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694631863] [2024-06-21 20:07:02,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:02,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:07:02,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:02,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:07:02,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:07:02,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:02,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 426 transitions, 5889 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:02,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:02,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:02,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:03,594 INFO L124 PetriNetUnfolderBase]: 4228/7243 cut-off events. [2024-06-21 20:07:03,594 INFO L125 PetriNetUnfolderBase]: For 632848/632851 co-relation queries the response was YES. [2024-06-21 20:07:03,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47848 conditions, 7243 events. 4228/7243 cut-off events. For 632848/632851 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 51999 event pairs, 1332 based on Foata normal form. 3/7238 useless extension candidates. Maximal degree in co-relation 47686. Up to 6223 conditions per place. [2024-06-21 20:07:03,689 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 260 selfloop transitions, 175 changer transitions 0/442 dead transitions. [2024-06-21 20:07:03,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 442 transitions, 6797 flow [2024-06-21 20:07:03,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-21 20:07:03,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-06-21 20:07:03,690 INFO L175 Difference]: Start difference. First operand has 350 places, 426 transitions, 5889 flow. Second operand 9 states and 200 transitions. [2024-06-21 20:07:03,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 442 transitions, 6797 flow [2024-06-21 20:07:06,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 442 transitions, 6453 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:06,302 INFO L231 Difference]: Finished difference. Result has 353 places, 426 transitions, 5901 flow [2024-06-21 20:07:06,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5901, PETRI_PLACES=353, PETRI_TRANSITIONS=426} [2024-06-21 20:07:06,302 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 312 predicate places. [2024-06-21 20:07:06,302 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 426 transitions, 5901 flow [2024-06-21 20:07:06,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:07:06,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:06,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:06,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:07:06,303 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 20:07:06,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:06,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1893304628, now seen corresponding path program 4 times [2024-06-21 20:07:06,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:06,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224597584] [2024-06-21 20:07:06,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:06,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:06,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224597584] [2024-06-21 20:07:06,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224597584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:06,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:06,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:06,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929386037] [2024-06-21 20:07:06,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:06,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:06,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:06,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:06,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:06,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 426 transitions, 5901 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:06,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:06,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:06,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:07,799 INFO L124 PetriNetUnfolderBase]: 4264/7274 cut-off events. [2024-06-21 20:07:07,799 INFO L125 PetriNetUnfolderBase]: For 682880/682883 co-relation queries the response was YES. [2024-06-21 20:07:07,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48408 conditions, 7274 events. 4264/7274 cut-off events. For 682880/682883 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 52051 event pairs, 1291 based on Foata normal form. 12/7269 useless extension candidates. Maximal degree in co-relation 48245. Up to 6488 conditions per place. [2024-06-21 20:07:07,887 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 349 selfloop transitions, 91 changer transitions 4/451 dead transitions. [2024-06-21 20:07:07,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 451 transitions, 6932 flow [2024-06-21 20:07:07,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:07:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:07:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-21 20:07:07,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5722222222222222 [2024-06-21 20:07:07,888 INFO L175 Difference]: Start difference. First operand has 353 places, 426 transitions, 5901 flow. Second operand 9 states and 206 transitions. [2024-06-21 20:07:07,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 451 transitions, 6932 flow [2024-06-21 20:07:10,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 451 transitions, 6406 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 20:07:10,429 INFO L231 Difference]: Finished difference. Result has 351 places, 427 transitions, 5629 flow [2024-06-21 20:07:10,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5375, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5629, PETRI_PLACES=351, PETRI_TRANSITIONS=427} [2024-06-21 20:07:10,429 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 310 predicate places. [2024-06-21 20:07:10,429 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 427 transitions, 5629 flow [2024-06-21 20:07:10,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:10,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:10,430 INFO 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 20:07:10,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:07:10,430 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 20:07:10,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:10,430 INFO L85 PathProgramCache]: Analyzing trace with hash 78898774, now seen corresponding path program 5 times [2024-06-21 20:07:10,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:10,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982524347] [2024-06-21 20:07:10,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:10,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:10,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:10,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:10,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982524347] [2024-06-21 20:07:10,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982524347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:10,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:10,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:10,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988824290] [2024-06-21 20:07:10,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:10,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:10,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:10,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:10,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 427 transitions, 5629 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:10,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:10,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:10,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:11,839 INFO L124 PetriNetUnfolderBase]: 4393/7464 cut-off events. [2024-06-21 20:07:11,839 INFO L125 PetriNetUnfolderBase]: For 772700/772700 co-relation queries the response was YES. [2024-06-21 20:07:11,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52591 conditions, 7464 events. 4393/7464 cut-off events. For 772700/772700 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 53333 event pairs, 1386 based on Foata normal form. 2/7458 useless extension candidates. Maximal degree in co-relation 52427. Up to 6242 conditions per place. [2024-06-21 20:07:11,939 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 243 selfloop transitions, 215 changer transitions 0/465 dead transitions. [2024-06-21 20:07:11,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 465 transitions, 7090 flow [2024-06-21 20:07:11,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:11,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:11,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:07:11,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:07:11,940 INFO L175 Difference]: Start difference. First operand has 351 places, 427 transitions, 5629 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:07:11,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 465 transitions, 7090 flow [2024-06-21 20:07:14,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 465 transitions, 6819 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 20:07:14,713 INFO L231 Difference]: Finished difference. Result has 352 places, 435 transitions, 6097 flow [2024-06-21 20:07:14,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6097, PETRI_PLACES=352, PETRI_TRANSITIONS=435} [2024-06-21 20:07:14,713 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 311 predicate places. [2024-06-21 20:07:14,713 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 435 transitions, 6097 flow [2024-06-21 20:07:14,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:14,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:14,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:14,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 20:07:14,714 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 20:07:14,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:14,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1951719412, now seen corresponding path program 6 times [2024-06-21 20:07:14,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:14,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195562402] [2024-06-21 20:07:14,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:14,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:14,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:14,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:14,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195562402] [2024-06-21 20:07:14,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195562402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:14,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:14,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:14,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537918754] [2024-06-21 20:07:14,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:14,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:14,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:14,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:14,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:14,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:14,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 435 transitions, 6097 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:14,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:14,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:14,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:16,167 INFO L124 PetriNetUnfolderBase]: 4578/7738 cut-off events. [2024-06-21 20:07:16,167 INFO L125 PetriNetUnfolderBase]: For 936148/936148 co-relation queries the response was YES. [2024-06-21 20:07:16,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59223 conditions, 7738 events. 4578/7738 cut-off events. For 936148/936148 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 55218 event pairs, 1452 based on Foata normal form. 2/7732 useless extension candidates. Maximal degree in co-relation 59057. Up to 6471 conditions per place. [2024-06-21 20:07:16,267 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 254 selfloop transitions, 212 changer transitions 0/473 dead transitions. [2024-06-21 20:07:16,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 473 transitions, 7592 flow [2024-06-21 20:07:16,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:16,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-21 20:07:16,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61875 [2024-06-21 20:07:16,268 INFO L175 Difference]: Start difference. First operand has 352 places, 435 transitions, 6097 flow. Second operand 8 states and 198 transitions. [2024-06-21 20:07:16,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 473 transitions, 7592 flow [2024-06-21 20:07:19,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 473 transitions, 7114 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:19,124 INFO L231 Difference]: Finished difference. Result has 356 places, 443 transitions, 6369 flow [2024-06-21 20:07:19,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6369, PETRI_PLACES=356, PETRI_TRANSITIONS=443} [2024-06-21 20:07:19,125 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 315 predicate places. [2024-06-21 20:07:19,125 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 443 transitions, 6369 flow [2024-06-21 20:07:19,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:19,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:19,125 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] [2024-06-21 20:07:19,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 20:07:19,125 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 20:07:19,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:19,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1982106808, now seen corresponding path program 7 times [2024-06-21 20:07:19,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:19,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923113051] [2024-06-21 20:07:19,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:19,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:19,209 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 20:07:19,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:19,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923113051] [2024-06-21 20:07:19,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923113051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:19,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:19,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:19,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022805640] [2024-06-21 20:07:19,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:19,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:19,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:19,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:19,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:19,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:19,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 443 transitions, 6369 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:19,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:19,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:19,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:20,652 INFO L124 PetriNetUnfolderBase]: 4573/7737 cut-off events. [2024-06-21 20:07:20,653 INFO L125 PetriNetUnfolderBase]: For 943935/943935 co-relation queries the response was YES. [2024-06-21 20:07:20,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59300 conditions, 7737 events. 4573/7737 cut-off events. For 943935/943935 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55304 event pairs, 1459 based on Foata normal form. 2/7732 useless extension candidates. Maximal degree in co-relation 59132. Up to 6663 conditions per place. [2024-06-21 20:07:20,763 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 250 selfloop transitions, 208 changer transitions 0/465 dead transitions. [2024-06-21 20:07:20,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 465 transitions, 7339 flow [2024-06-21 20:07:20,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:20,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:07:20,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:07:20,764 INFO L175 Difference]: Start difference. First operand has 356 places, 443 transitions, 6369 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:07:20,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 465 transitions, 7339 flow [2024-06-21 20:07:23,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 465 transitions, 6852 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:23,539 INFO L231 Difference]: Finished difference. Result has 359 places, 443 transitions, 6303 flow [2024-06-21 20:07:23,539 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5882, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6303, PETRI_PLACES=359, PETRI_TRANSITIONS=443} [2024-06-21 20:07:23,540 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 318 predicate places. [2024-06-21 20:07:23,540 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 443 transitions, 6303 flow [2024-06-21 20:07:23,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:23,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:23,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:23,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 20:07:23,540 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 20:07:23,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:23,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1313361080, now seen corresponding path program 8 times [2024-06-21 20:07:23,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:23,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717299762] [2024-06-21 20:07:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:23,615 INFO 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 20:07:23,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:23,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717299762] [2024-06-21 20:07:23,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717299762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:23,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:23,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:23,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762774264] [2024-06-21 20:07:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:23,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:23,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:23,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:23,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:23,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:23,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 443 transitions, 6303 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:23,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:23,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:23,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:24,985 INFO L124 PetriNetUnfolderBase]: 4581/7749 cut-off events. [2024-06-21 20:07:24,985 INFO L125 PetriNetUnfolderBase]: For 958631/958631 co-relation queries the response was YES. [2024-06-21 20:07:25,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59186 conditions, 7749 events. 4581/7749 cut-off events. For 958631/958631 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55391 event pairs, 1459 based on Foata normal form. 2/7744 useless extension candidates. Maximal degree in co-relation 59017. Up to 6675 conditions per place. [2024-06-21 20:07:25,092 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 255 selfloop transitions, 205 changer transitions 0/467 dead transitions. [2024-06-21 20:07:25,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 467 transitions, 7338 flow [2024-06-21 20:07:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:25,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:25,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-21 20:07:25,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59375 [2024-06-21 20:07:25,093 INFO L175 Difference]: Start difference. First operand has 359 places, 443 transitions, 6303 flow. Second operand 8 states and 190 transitions. [2024-06-21 20:07:25,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 467 transitions, 7338 flow [2024-06-21 20:07:28,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 467 transitions, 6879 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:28,137 INFO L231 Difference]: Finished difference. Result has 361 places, 445 transitions, 6324 flow [2024-06-21 20:07:28,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6324, PETRI_PLACES=361, PETRI_TRANSITIONS=445} [2024-06-21 20:07:28,137 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 320 predicate places. [2024-06-21 20:07:28,137 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 445 transitions, 6324 flow [2024-06-21 20:07:28,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:28,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:28,138 INFO 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 20:07:28,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 20:07:28,138 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 20:07:28,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:28,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1598400500, now seen corresponding path program 9 times [2024-06-21 20:07:28,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:28,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744469079] [2024-06-21 20:07:28,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:28,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:28,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:28,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:28,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744469079] [2024-06-21 20:07:28,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744469079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:28,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:28,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:28,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415235737] [2024-06-21 20:07:28,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:28,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:28,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:28,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:28,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:28,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:28,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 445 transitions, 6324 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:28,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:28,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:28,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:30,004 INFO L124 PetriNetUnfolderBase]: 4589/7761 cut-off events. [2024-06-21 20:07:30,004 INFO L125 PetriNetUnfolderBase]: For 977239/977239 co-relation queries the response was YES. [2024-06-21 20:07:30,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59503 conditions, 7761 events. 4589/7761 cut-off events. For 977239/977239 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 55172 event pairs, 1304 based on Foata normal form. 2/7756 useless extension candidates. Maximal degree in co-relation 59333. Up to 3602 conditions per place. [2024-06-21 20:07:30,199 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 235 selfloop transitions, 242 changer transitions 0/484 dead transitions. [2024-06-21 20:07:30,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 484 transitions, 7853 flow [2024-06-21 20:07:30,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:30,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-21 20:07:30,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:07:30,200 INFO L175 Difference]: Start difference. First operand has 361 places, 445 transitions, 6324 flow. Second operand 8 states and 204 transitions. [2024-06-21 20:07:30,200 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 484 transitions, 7853 flow [2024-06-21 20:07:33,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 484 transitions, 7400 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:33,028 INFO L231 Difference]: Finished difference. Result has 363 places, 447 transitions, 6427 flow [2024-06-21 20:07:33,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5871, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6427, PETRI_PLACES=363, PETRI_TRANSITIONS=447} [2024-06-21 20:07:33,028 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-21 20:07:33,028 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 447 transitions, 6427 flow [2024-06-21 20:07:33,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:33,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:33,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:33,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 20:07:33,030 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 20:07:33,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:33,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1609828340, now seen corresponding path program 10 times [2024-06-21 20:07:33,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:33,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757259082] [2024-06-21 20:07:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:33,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:33,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:07:33,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:33,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757259082] [2024-06-21 20:07:33,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757259082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:33,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:33,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:33,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082184816] [2024-06-21 20:07:33,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:33,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:33,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:33,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:33,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:33,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:33,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 447 transitions, 6427 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:33,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:33,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:33,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:35,013 INFO L124 PetriNetUnfolderBase]: 4564/7720 cut-off events. [2024-06-21 20:07:35,013 INFO L125 PetriNetUnfolderBase]: For 990761/990761 co-relation queries the response was YES. [2024-06-21 20:07:35,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59203 conditions, 7720 events. 4564/7720 cut-off events. For 990761/990761 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 54835 event pairs, 1311 based on Foata normal form. 8/7721 useless extension candidates. Maximal degree in co-relation 59032. Up to 3588 conditions per place. [2024-06-21 20:07:35,115 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 245 selfloop transitions, 229 changer transitions 2/483 dead transitions. [2024-06-21 20:07:35,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 483 transitions, 7695 flow [2024-06-21 20:07:35,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-21 20:07:35,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.634375 [2024-06-21 20:07:35,116 INFO L175 Difference]: Start difference. First operand has 363 places, 447 transitions, 6427 flow. Second operand 8 states and 203 transitions. [2024-06-21 20:07:35,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 483 transitions, 7695 flow [2024-06-21 20:07:38,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 483 transitions, 7051 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-21 20:07:38,270 INFO L231 Difference]: Finished difference. Result has 363 places, 447 transitions, 6247 flow [2024-06-21 20:07:38,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6247, PETRI_PLACES=363, PETRI_TRANSITIONS=447} [2024-06-21 20:07:38,270 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 322 predicate places. [2024-06-21 20:07:38,270 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 447 transitions, 6247 flow [2024-06-21 20:07:38,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:38,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:38,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:38,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 20:07:38,271 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 20:07:38,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:38,271 INFO L85 PathProgramCache]: Analyzing trace with hash 660163994, now seen corresponding path program 11 times [2024-06-21 20:07:38,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:38,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832424919] [2024-06-21 20:07:38,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:38,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:38,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:38,378 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 20:07:38,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:38,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832424919] [2024-06-21 20:07:38,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832424919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:38,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:38,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:38,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024150911] [2024-06-21 20:07:38,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:38,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:38,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:38,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:38,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:38,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:38,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 447 transitions, 6247 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:38,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:38,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:38,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:40,367 INFO L124 PetriNetUnfolderBase]: 4572/7750 cut-off events. [2024-06-21 20:07:40,367 INFO L125 PetriNetUnfolderBase]: For 970364/970364 co-relation queries the response was YES. [2024-06-21 20:07:40,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58533 conditions, 7750 events. 4572/7750 cut-off events. For 970364/970364 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 55505 event pairs, 1410 based on Foata normal form. 2/7747 useless extension candidates. Maximal degree in co-relation 58364. Up to 7009 conditions per place. [2024-06-21 20:07:40,475 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 380 selfloop transitions, 81 changer transitions 0/468 dead transitions. [2024-06-21 20:07:40,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 468 transitions, 7287 flow [2024-06-21 20:07:40,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:40,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-21 20:07:40,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56875 [2024-06-21 20:07:40,476 INFO L175 Difference]: Start difference. First operand has 363 places, 447 transitions, 6247 flow. Second operand 8 states and 182 transitions. [2024-06-21 20:07:40,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 468 transitions, 7287 flow [2024-06-21 20:07:43,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 468 transitions, 6802 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:07:43,741 INFO L231 Difference]: Finished difference. Result has 364 places, 449 transitions, 6005 flow [2024-06-21 20:07:43,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6005, PETRI_PLACES=364, PETRI_TRANSITIONS=449} [2024-06-21 20:07:43,742 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 323 predicate places. [2024-06-21 20:07:43,742 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 449 transitions, 6005 flow [2024-06-21 20:07:43,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:43,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:43,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:07:43,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 20:07:43,742 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 20:07:43,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash 60399604, now seen corresponding path program 12 times [2024-06-21 20:07:43,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:43,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308992822] [2024-06-21 20:07:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:43,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:43,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:43,822 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 20:07:43,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:43,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308992822] [2024-06-21 20:07:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308992822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:43,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439660021] [2024-06-21 20:07:43,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:43,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:43,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:43,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 449 transitions, 6005 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:43,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:43,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:43,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:45,542 INFO L124 PetriNetUnfolderBase]: 4549/7691 cut-off events. [2024-06-21 20:07:45,543 INFO L125 PetriNetUnfolderBase]: For 973000/973000 co-relation queries the response was YES. [2024-06-21 20:07:45,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56434 conditions, 7691 events. 4549/7691 cut-off events. For 973000/973000 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 54840 event pairs, 1423 based on Foata normal form. 10/7694 useless extension candidates. Maximal degree in co-relation 56264. Up to 6111 conditions per place. [2024-06-21 20:07:45,640 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 266 selfloop transitions, 203 changer transitions 2/478 dead transitions. [2024-06-21 20:07:45,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 478 transitions, 7247 flow [2024-06-21 20:07:45,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:45,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:45,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-21 20:07:45,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615625 [2024-06-21 20:07:45,641 INFO L175 Difference]: Start difference. First operand has 364 places, 449 transitions, 6005 flow. Second operand 8 states and 197 transitions. [2024-06-21 20:07:45,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 478 transitions, 7247 flow [2024-06-21 20:07:49,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 478 transitions, 7038 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 20:07:49,336 INFO L231 Difference]: Finished difference. Result has 366 places, 449 transitions, 6209 flow [2024-06-21 20:07:49,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6209, PETRI_PLACES=366, PETRI_TRANSITIONS=449} [2024-06-21 20:07:49,336 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 325 predicate places. [2024-06-21 20:07:49,336 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 449 transitions, 6209 flow [2024-06-21 20:07:49,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:49,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:49,337 INFO 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 20:07:49,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 20:07:49,337 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 20:07:49,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:49,338 INFO L85 PathProgramCache]: Analyzing trace with hash 51828724, now seen corresponding path program 13 times [2024-06-21 20:07:49,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:49,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718532679] [2024-06-21 20:07:49,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:49,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:49,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:49,425 INFO 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 20:07:49,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:49,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718532679] [2024-06-21 20:07:49,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718532679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:49,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:49,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:49,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485469178] [2024-06-21 20:07:49,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:49,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:49,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:49,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:49,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:49,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:49,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 449 transitions, 6209 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:49,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:49,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:49,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:51,134 INFO L124 PetriNetUnfolderBase]: 4519/7651 cut-off events. [2024-06-21 20:07:51,134 INFO L125 PetriNetUnfolderBase]: For 943073/943073 co-relation queries the response was YES. [2024-06-21 20:07:51,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55643 conditions, 7651 events. 4519/7651 cut-off events. For 943073/943073 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 54632 event pairs, 1429 based on Foata normal form. 10/7654 useless extension candidates. Maximal degree in co-relation 55472. Up to 6549 conditions per place. [2024-06-21 20:07:51,234 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 267 selfloop transitions, 197 changer transitions 0/471 dead transitions. [2024-06-21 20:07:51,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 471 transitions, 7203 flow [2024-06-21 20:07:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:07:51,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:07:51,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:07:51,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 20:07:51,235 INFO L175 Difference]: Start difference. First operand has 366 places, 449 transitions, 6209 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:07:51,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 471 transitions, 7203 flow [2024-06-21 20:07:55,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 471 transitions, 6742 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-21 20:07:55,215 INFO L231 Difference]: Finished difference. Result has 369 places, 449 transitions, 6148 flow [2024-06-21 20:07:55,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6148, PETRI_PLACES=369, PETRI_TRANSITIONS=449} [2024-06-21 20:07:55,216 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 328 predicate places. [2024-06-21 20:07:55,216 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 449 transitions, 6148 flow [2024-06-21 20:07:55,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:55,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:07:55,217 INFO 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 20:07:55,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 20:07:55,217 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 20:07:55,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:07:55,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1050407752, now seen corresponding path program 14 times [2024-06-21 20:07:55,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:07:55,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127747899] [2024-06-21 20:07:55,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:07:55,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:07:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:07:55,298 INFO 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 20:07:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:07:55,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127747899] [2024-06-21 20:07:55,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127747899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:07:55,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:07:55,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:07:55,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842905302] [2024-06-21 20:07:55,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:07:55,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:07:55,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:07:55,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:07:55,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:07:55,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:07:55,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 449 transitions, 6148 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:07:55,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:07:55,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:07:55,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:07:57,019 INFO L124 PetriNetUnfolderBase]: 4496/7636 cut-off events. [2024-06-21 20:07:57,019 INFO L125 PetriNetUnfolderBase]: For 899721/899721 co-relation queries the response was YES. [2024-06-21 20:07:57,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53842 conditions, 7636 events. 4496/7636 cut-off events. For 899721/899721 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 54743 event pairs, 1380 based on Foata normal form. 10/7641 useless extension candidates. Maximal degree in co-relation 53670. Up to 6818 conditions per place. [2024-06-21 20:07:57,119 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 367 selfloop transitions, 96 changer transitions 0/470 dead transitions. [2024-06-21 20:07:57,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 470 transitions, 7136 flow [2024-06-21 20:07:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:07:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:07:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-21 20:07:57,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56 [2024-06-21 20:07:57,120 INFO L175 Difference]: Start difference. First operand has 369 places, 449 transitions, 6148 flow. Second operand 10 states and 224 transitions. [2024-06-21 20:07:57,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 470 transitions, 7136 flow [2024-06-21 20:08:00,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 470 transitions, 6701 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:08:00,822 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 5911 flow [2024-06-21 20:08:00,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5713, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5911, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-21 20:08:00,823 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-21 20:08:00,823 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 5911 flow [2024-06-21 20:08:00,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:00,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:00,823 INFO 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 20:08:00,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 20:08:00,824 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 20:08:00,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:00,824 INFO L85 PathProgramCache]: Analyzing trace with hash -822506602, now seen corresponding path program 15 times [2024-06-21 20:08:00,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:00,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113863653] [2024-06-21 20:08:00,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:00,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:00,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:00,914 INFO 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 20:08:00,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113863653] [2024-06-21 20:08:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113863653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:00,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:00,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602697843] [2024-06-21 20:08:00,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:00,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:00,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:00,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:00,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:00,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:00,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 5911 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:00,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:00,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:00,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:02,720 INFO L124 PetriNetUnfolderBase]: 4473/7603 cut-off events. [2024-06-21 20:08:02,720 INFO L125 PetriNetUnfolderBase]: For 862605/862605 co-relation queries the response was YES. [2024-06-21 20:08:02,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52234 conditions, 7603 events. 4473/7603 cut-off events. For 862605/862605 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 54470 event pairs, 1371 based on Foata normal form. 10/7608 useless extension candidates. Maximal degree in co-relation 52061. Up to 6785 conditions per place. [2024-06-21 20:08:02,814 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 369 selfloop transitions, 92 changer transitions 0/468 dead transitions. [2024-06-21 20:08:02,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 468 transitions, 6891 flow [2024-06-21 20:08:02,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:02,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-21 20:08:02,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.58125 [2024-06-21 20:08:02,815 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 5911 flow. Second operand 8 states and 186 transitions. [2024-06-21 20:08:02,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 468 transitions, 6891 flow [2024-06-21 20:08:06,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 468 transitions, 6655 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 20:08:06,849 INFO L231 Difference]: Finished difference. Result has 371 places, 449 transitions, 5865 flow [2024-06-21 20:08:06,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5865, PETRI_PLACES=371, PETRI_TRANSITIONS=449} [2024-06-21 20:08:06,849 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 330 predicate places. [2024-06-21 20:08:06,850 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 449 transitions, 5865 flow [2024-06-21 20:08:06,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:06,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:06,850 INFO 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 20:08:06,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 20:08:06,850 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 20:08:06,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:06,850 INFO L85 PathProgramCache]: Analyzing trace with hash -813935722, now seen corresponding path program 16 times [2024-06-21 20:08:06,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:06,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314220955] [2024-06-21 20:08:06,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:06,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:06,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:06,937 INFO 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 20:08:06,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:06,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314220955] [2024-06-21 20:08:06,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314220955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:06,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:06,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537826102] [2024-06-21 20:08:06,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:06,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:06,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:06,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:06,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:06,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:06,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 449 transitions, 5865 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:06,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:06,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:06,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:08,700 INFO L124 PetriNetUnfolderBase]: 4443/7545 cut-off events. [2024-06-21 20:08:08,700 INFO L125 PetriNetUnfolderBase]: For 818574/818574 co-relation queries the response was YES. [2024-06-21 20:08:08,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50563 conditions, 7545 events. 4443/7545 cut-off events. For 818574/818574 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 53897 event pairs, 1341 based on Foata normal form. 10/7550 useless extension candidates. Maximal degree in co-relation 50389. Up to 6053 conditions per place. [2024-06-21 20:08:08,797 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 366 selfloop transitions, 99 changer transitions 2/474 dead transitions. [2024-06-21 20:08:08,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 474 transitions, 6889 flow [2024-06-21 20:08:08,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:08,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:08,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:08:08,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-06-21 20:08:08,799 INFO L175 Difference]: Start difference. First operand has 371 places, 449 transitions, 5865 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:08:08,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 474 transitions, 6889 flow [2024-06-21 20:08:12,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 474 transitions, 6625 flow, removed 42 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:12,749 INFO L231 Difference]: Finished difference. Result has 373 places, 449 transitions, 5807 flow [2024-06-21 20:08:12,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5601, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5807, PETRI_PLACES=373, PETRI_TRANSITIONS=449} [2024-06-21 20:08:12,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 20:08:12,750 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 449 transitions, 5807 flow [2024-06-21 20:08:12,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:12,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:12,750 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 20:08:12,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 20:08:12,750 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 20:08:12,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:12,751 INFO L85 PathProgramCache]: Analyzing trace with hash -636916174, now seen corresponding path program 1 times [2024-06-21 20:08:12,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:12,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120588141] [2024-06-21 20:08:12,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:12,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:12,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:12,838 INFO 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 20:08:12,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:12,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120588141] [2024-06-21 20:08:12,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120588141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:12,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:12,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630359491] [2024-06-21 20:08:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:12,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:12,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:12,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:12,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 449 transitions, 5807 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:12,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:12,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:12,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:14,536 INFO L124 PetriNetUnfolderBase]: 4451/7563 cut-off events. [2024-06-21 20:08:14,536 INFO L125 PetriNetUnfolderBase]: For 784905/784905 co-relation queries the response was YES. [2024-06-21 20:08:14,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50298 conditions, 7563 events. 4451/7563 cut-off events. For 784905/784905 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 54117 event pairs, 1353 based on Foata normal form. 2/7560 useless extension candidates. Maximal degree in co-relation 50123. Up to 6833 conditions per place. [2024-06-21 20:08:14,631 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 385 selfloop transitions, 74 changer transitions 0/466 dead transitions. [2024-06-21 20:08:14,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 466 transitions, 6812 flow [2024-06-21 20:08:14,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:08:14,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:08:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-21 20:08:14,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5821428571428572 [2024-06-21 20:08:14,632 INFO L175 Difference]: Start difference. First operand has 373 places, 449 transitions, 5807 flow. Second operand 7 states and 163 transitions. [2024-06-21 20:08:14,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 466 transitions, 6812 flow [2024-06-21 20:08:18,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 466 transitions, 6591 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 20:08:18,749 INFO L231 Difference]: Finished difference. Result has 373 places, 451 transitions, 5794 flow [2024-06-21 20:08:18,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5794, PETRI_PLACES=373, PETRI_TRANSITIONS=451} [2024-06-21 20:08:18,750 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 332 predicate places. [2024-06-21 20:08:18,750 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 451 transitions, 5794 flow [2024-06-21 20:08:18,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:18,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:18,750 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 20:08:18,750 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 20:08:18,750 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 20:08:18,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:18,750 INFO L85 PathProgramCache]: Analyzing trace with hash -636440944, now seen corresponding path program 2 times [2024-06-21 20:08:18,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:18,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948115535] [2024-06-21 20:08:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:18,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:18,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:18,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948115535] [2024-06-21 20:08:18,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948115535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:18,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:18,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:18,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407230641] [2024-06-21 20:08:18,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:18,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:18,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:18,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:18,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:18,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:18,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 451 transitions, 5794 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:18,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:18,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:18,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:20,540 INFO L124 PetriNetUnfolderBase]: 4500/7624 cut-off events. [2024-06-21 20:08:20,540 INFO L125 PetriNetUnfolderBase]: For 832109/832109 co-relation queries the response was YES. [2024-06-21 20:08:20,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51227 conditions, 7624 events. 4500/7624 cut-off events. For 832109/832109 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 54498 event pairs, 1348 based on Foata normal form. 2/7621 useless extension candidates. Maximal degree in co-relation 51051. Up to 6823 conditions per place. [2024-06-21 20:08:20,635 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 390 selfloop transitions, 78 changer transitions 1/476 dead transitions. [2024-06-21 20:08:20,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 476 transitions, 7088 flow [2024-06-21 20:08:20,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:08:20,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:08:20,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 20:08:20,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-06-21 20:08:20,636 INFO L175 Difference]: Start difference. First operand has 373 places, 451 transitions, 5794 flow. Second operand 7 states and 168 transitions. [2024-06-21 20:08:20,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 476 transitions, 7088 flow [2024-06-21 20:08:24,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 476 transitions, 6881 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:08:24,676 INFO L231 Difference]: Finished difference. Result has 376 places, 455 transitions, 5848 flow [2024-06-21 20:08:24,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5591, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5848, PETRI_PLACES=376, PETRI_TRANSITIONS=455} [2024-06-21 20:08:24,676 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 335 predicate places. [2024-06-21 20:08:24,676 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 455 transitions, 5848 flow [2024-06-21 20:08:24,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:24,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:24,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:24,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 20:08:24,677 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 20:08:24,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:24,677 INFO L85 PathProgramCache]: Analyzing trace with hash -554997262, now seen corresponding path program 17 times [2024-06-21 20:08:24,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:24,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130465518] [2024-06-21 20:08:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:24,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:24,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:24,755 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 20:08:24,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:24,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130465518] [2024-06-21 20:08:24,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130465518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:24,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:24,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:24,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242521291] [2024-06-21 20:08:24,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:24,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:24,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:24,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:24,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:24,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:24,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 455 transitions, 5848 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:24,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:24,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:24,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:26,342 INFO L124 PetriNetUnfolderBase]: 4386/7429 cut-off events. [2024-06-21 20:08:26,342 INFO L125 PetriNetUnfolderBase]: For 802479/802482 co-relation queries the response was YES. [2024-06-21 20:08:26,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45458 conditions, 7429 events. 4386/7429 cut-off events. For 802479/802482 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 53090 event pairs, 1198 based on Foata normal form. 46/7446 useless extension candidates. Maximal degree in co-relation 45280. Up to 6115 conditions per place. [2024-06-21 20:08:26,444 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 294 selfloop transitions, 191 changer transitions 3/495 dead transitions. [2024-06-21 20:08:26,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 495 transitions, 6942 flow [2024-06-21 20:08:26,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:08:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:08:26,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 232 transitions. [2024-06-21 20:08:26,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6444444444444445 [2024-06-21 20:08:26,445 INFO L175 Difference]: Start difference. First operand has 376 places, 455 transitions, 5848 flow. Second operand 9 states and 232 transitions. [2024-06-21 20:08:26,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 495 transitions, 6942 flow [2024-06-21 20:08:28,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 495 transitions, 6713 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-21 20:08:28,989 INFO L231 Difference]: Finished difference. Result has 381 places, 454 transitions, 6001 flow [2024-06-21 20:08:28,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5619, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=191, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6001, PETRI_PLACES=381, PETRI_TRANSITIONS=454} [2024-06-21 20:08:28,989 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 340 predicate places. [2024-06-21 20:08:28,989 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 454 transitions, 6001 flow [2024-06-21 20:08:28,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:28,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:28,989 INFO 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 20:08:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 20:08:28,989 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 20:08:28,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:28,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1250539718, now seen corresponding path program 18 times [2024-06-21 20:08:28,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:28,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673128180] [2024-06-21 20:08:28,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:29,069 INFO 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 20:08:29,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:29,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673128180] [2024-06-21 20:08:29,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673128180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:29,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:29,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:29,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147661147] [2024-06-21 20:08:29,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:29,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:29,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:29,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:29,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:29,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:29,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 454 transitions, 6001 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:29,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:29,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:29,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:30,887 INFO L124 PetriNetUnfolderBase]: 4323/7359 cut-off events. [2024-06-21 20:08:30,887 INFO L125 PetriNetUnfolderBase]: For 563189/563189 co-relation queries the response was YES. [2024-06-21 20:08:30,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43878 conditions, 7359 events. 4323/7359 cut-off events. For 563189/563189 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 52661 event pairs, 1273 based on Foata normal form. 10/7364 useless extension candidates. Maximal degree in co-relation 43699. Up to 6264 conditions per place. [2024-06-21 20:08:30,974 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 293 selfloop transitions, 193 changer transitions 0/493 dead transitions. [2024-06-21 20:08:30,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 493 transitions, 7083 flow [2024-06-21 20:08:30,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:08:30,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:08:30,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 246 transitions. [2024-06-21 20:08:30,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-21 20:08:30,975 INFO L175 Difference]: Start difference. First operand has 381 places, 454 transitions, 6001 flow. Second operand 10 states and 246 transitions. [2024-06-21 20:08:30,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 493 transitions, 7083 flow [2024-06-21 20:08:33,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 493 transitions, 6643 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 20:08:33,858 INFO L231 Difference]: Finished difference. Result has 382 places, 454 transitions, 5963 flow [2024-06-21 20:08:33,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5963, PETRI_PLACES=382, PETRI_TRANSITIONS=454} [2024-06-21 20:08:33,858 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 341 predicate places. [2024-06-21 20:08:33,858 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 454 transitions, 5963 flow [2024-06-21 20:08:33,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:33,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:33,859 INFO 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 20:08:33,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 20:08:33,859 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 20:08:33,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:33,859 INFO L85 PathProgramCache]: Analyzing trace with hash -879845132, now seen corresponding path program 19 times [2024-06-21 20:08:33,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:33,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876596389] [2024-06-21 20:08:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:33,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:33,951 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 20:08:33,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:33,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876596389] [2024-06-21 20:08:33,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876596389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:33,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:33,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:33,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953244722] [2024-06-21 20:08:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:33,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:33,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:33,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:33,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:33,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 454 transitions, 5963 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:33,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:33,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:33,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:35,646 INFO L124 PetriNetUnfolderBase]: 4300/7321 cut-off events. [2024-06-21 20:08:35,646 INFO L125 PetriNetUnfolderBase]: For 492844/492844 co-relation queries the response was YES. [2024-06-21 20:08:35,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42049 conditions, 7321 events. 4300/7321 cut-off events. For 492844/492844 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 52317 event pairs, 1259 based on Foata normal form. 10/7326 useless extension candidates. Maximal degree in co-relation 41870. Up to 6237 conditions per place. [2024-06-21 20:08:35,738 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 299 selfloop transitions, 179 changer transitions 0/485 dead transitions. [2024-06-21 20:08:35,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 485 transitions, 7009 flow [2024-06-21 20:08:35,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:35,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 200 transitions. [2024-06-21 20:08:35,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-06-21 20:08:35,739 INFO L175 Difference]: Start difference. First operand has 382 places, 454 transitions, 5963 flow. Second operand 8 states and 200 transitions. [2024-06-21 20:08:35,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 485 transitions, 7009 flow [2024-06-21 20:08:38,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 485 transitions, 6565 flow, removed 24 selfloop flow, removed 11 redundant places. [2024-06-21 20:08:38,692 INFO L231 Difference]: Finished difference. Result has 379 places, 454 transitions, 5890 flow [2024-06-21 20:08:38,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5519, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5890, PETRI_PLACES=379, PETRI_TRANSITIONS=454} [2024-06-21 20:08:38,692 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 20:08:38,693 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 454 transitions, 5890 flow [2024-06-21 20:08:38,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:38,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:38,693 INFO 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 20:08:38,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 20:08:38,693 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 20:08:38,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:38,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1487011748, now seen corresponding path program 20 times [2024-06-21 20:08:38,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:38,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462983624] [2024-06-21 20:08:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:38,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:38,790 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 20:08:38,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:38,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462983624] [2024-06-21 20:08:38,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462983624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:38,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:38,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:08:38,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569339301] [2024-06-21 20:08:38,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:38,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:08:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:08:38,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:08:38,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:38,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 454 transitions, 5890 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:38,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:38,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:38,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:40,285 INFO L124 PetriNetUnfolderBase]: 4270/7278 cut-off events. [2024-06-21 20:08:40,285 INFO L125 PetriNetUnfolderBase]: For 424825/424825 co-relation queries the response was YES. [2024-06-21 20:08:40,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40182 conditions, 7278 events. 4270/7278 cut-off events. For 424825/424825 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 51832 event pairs, 1094 based on Foata normal form. 10/7283 useless extension candidates. Maximal degree in co-relation 40004. Up to 4412 conditions per place. [2024-06-21 20:08:40,379 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 281 selfloop transitions, 201 changer transitions 2/491 dead transitions. [2024-06-21 20:08:40,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 491 transitions, 6980 flow [2024-06-21 20:08:40,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:08:40,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:08:40,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 20:08:40,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.640625 [2024-06-21 20:08:40,380 INFO L175 Difference]: Start difference. First operand has 379 places, 454 transitions, 5890 flow. Second operand 8 states and 205 transitions. [2024-06-21 20:08:40,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 491 transitions, 6980 flow [2024-06-21 20:08:43,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 491 transitions, 6565 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-21 20:08:43,584 INFO L231 Difference]: Finished difference. Result has 379 places, 454 transitions, 5895 flow [2024-06-21 20:08:43,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5475, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5895, PETRI_PLACES=379, PETRI_TRANSITIONS=454} [2024-06-21 20:08:43,584 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 338 predicate places. [2024-06-21 20:08:43,584 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 454 transitions, 5895 flow [2024-06-21 20:08:43,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 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 20:08:43,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:43,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:43,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 20:08:43,585 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 20:08:43,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:43,586 INFO L85 PathProgramCache]: Analyzing trace with hash -913306356, now seen corresponding path program 3 times [2024-06-21 20:08:43,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:43,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799579294] [2024-06-21 20:08:43,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:43,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:43,670 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 20:08:43,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:43,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799579294] [2024-06-21 20:08:43,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799579294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:43,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:43,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:43,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277352966] [2024-06-21 20:08:43,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:43,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:43,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:43,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:43,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:43,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:43,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 454 transitions, 5895 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:43,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:43,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:43,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:45,348 INFO L124 PetriNetUnfolderBase]: 4311/7299 cut-off events. [2024-06-21 20:08:45,348 INFO L125 PetriNetUnfolderBase]: For 415077/415077 co-relation queries the response was YES. [2024-06-21 20:08:45,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41191 conditions, 7299 events. 4311/7299 cut-off events. For 415077/415077 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 51848 event pairs, 1219 based on Foata normal form. 2/7291 useless extension candidates. Maximal degree in co-relation 41013. Up to 6360 conditions per place. [2024-06-21 20:08:45,446 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 383 selfloop transitions, 89 changer transitions 0/479 dead transitions. [2024-06-21 20:08:45,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 479 transitions, 7182 flow [2024-06-21 20:08:45,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:08:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:08:45,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-21 20:08:45,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6291666666666667 [2024-06-21 20:08:45,447 INFO L175 Difference]: Start difference. First operand has 379 places, 454 transitions, 5895 flow. Second operand 6 states and 151 transitions. [2024-06-21 20:08:45,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 479 transitions, 7182 flow [2024-06-21 20:08:47,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 479 transitions, 6694 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-21 20:08:47,788 INFO L231 Difference]: Finished difference. Result has 377 places, 457 transitions, 5702 flow [2024-06-21 20:08:47,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5702, PETRI_PLACES=377, PETRI_TRANSITIONS=457} [2024-06-21 20:08:47,788 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 336 predicate places. [2024-06-21 20:08:47,788 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 457 transitions, 5702 flow [2024-06-21 20:08:47,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:47,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:47,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:08:47,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 20:08:47,789 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 20:08:47,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2109215526, now seen corresponding path program 4 times [2024-06-21 20:08:47,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:47,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994477044] [2024-06-21 20:08:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:47,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:47,879 INFO 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 20:08:47,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:47,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994477044] [2024-06-21 20:08:47,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994477044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:47,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:47,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:47,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530542867] [2024-06-21 20:08:47,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:47,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:47,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:47,905 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:47,906 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 457 transitions, 5702 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:47,906 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:47,906 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:47,906 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:49,532 INFO L124 PetriNetUnfolderBase]: 4299/7319 cut-off events. [2024-06-21 20:08:49,532 INFO L125 PetriNetUnfolderBase]: For 401344/401344 co-relation queries the response was YES. [2024-06-21 20:08:49,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40319 conditions, 7319 events. 4299/7319 cut-off events. For 401344/401344 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 52281 event pairs, 1261 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 40140. Up to 6591 conditions per place. [2024-06-21 20:08:49,622 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 388 selfloop transitions, 79 changer transitions 0/474 dead transitions. [2024-06-21 20:08:49,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 474 transitions, 6678 flow [2024-06-21 20:08:49,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:08:49,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:08:49,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 20:08:49,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6083333333333333 [2024-06-21 20:08:49,623 INFO L175 Difference]: Start difference. First operand has 377 places, 457 transitions, 5702 flow. Second operand 6 states and 146 transitions. [2024-06-21 20:08:49,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 474 transitions, 6678 flow [2024-06-21 20:08:52,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 474 transitions, 6468 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-21 20:08:52,218 INFO L231 Difference]: Finished difference. Result has 380 places, 457 transitions, 5658 flow [2024-06-21 20:08:52,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5492, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5658, PETRI_PLACES=380, PETRI_TRANSITIONS=457} [2024-06-21 20:08:52,218 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-21 20:08:52,218 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 457 transitions, 5658 flow [2024-06-21 20:08:52,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:52,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:52,219 INFO 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 20:08:52,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 20:08:52,219 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 20:08:52,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:52,219 INFO L85 PathProgramCache]: Analyzing trace with hash 535285794, now seen corresponding path program 5 times [2024-06-21 20:08:52,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:52,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140366931] [2024-06-21 20:08:52,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:52,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:52,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:52,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:52,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:52,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140366931] [2024-06-21 20:08:52,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140366931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:52,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:52,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:52,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50173726] [2024-06-21 20:08:52,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:52,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:52,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:52,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:52,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:52,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 457 transitions, 5658 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:52,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:52,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:52,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:53,961 INFO L124 PetriNetUnfolderBase]: 4294/7319 cut-off events. [2024-06-21 20:08:53,961 INFO L125 PetriNetUnfolderBase]: For 401174/401177 co-relation queries the response was YES. [2024-06-21 20:08:54,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39481 conditions, 7319 events. 4294/7319 cut-off events. For 401174/401177 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 52091 event pairs, 1053 based on Foata normal form. 10/7321 useless extension candidates. Maximal degree in co-relation 39301. Up to 5438 conditions per place. [2024-06-21 20:08:54,050 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 393 selfloop transitions, 84 changer transitions 0/484 dead transitions. [2024-06-21 20:08:54,050 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 484 transitions, 7160 flow [2024-06-21 20:08:54,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:08:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:08:54,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 20:08:54,051 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-06-21 20:08:54,051 INFO L175 Difference]: Start difference. First operand has 380 places, 457 transitions, 5658 flow. Second operand 6 states and 149 transitions. [2024-06-21 20:08:54,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 484 transitions, 7160 flow [2024-06-21 20:08:56,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 484 transitions, 6915 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 20:08:56,699 INFO L231 Difference]: Finished difference. Result has 380 places, 459 transitions, 5645 flow [2024-06-21 20:08:56,699 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5417, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5645, PETRI_PLACES=380, PETRI_TRANSITIONS=459} [2024-06-21 20:08:56,699 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 339 predicate places. [2024-06-21 20:08:56,699 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 459 transitions, 5645 flow [2024-06-21 20:08:56,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:56,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:08:56,699 INFO 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 20:08:56,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 20:08:56,699 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 20:08:56,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:08:56,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1082989522, now seen corresponding path program 6 times [2024-06-21 20:08:56,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:08:56,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551273029] [2024-06-21 20:08:56,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:08:56,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:08:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:08:56,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:08:56,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:08:56,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551273029] [2024-06-21 20:08:56,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551273029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:08:56,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:08:56,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:08:56,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955519412] [2024-06-21 20:08:56,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:08:56,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:08:56,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:08:56,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:08:56,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:08:56,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:08:56,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 459 transitions, 5645 flow. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:08:56,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:08:56,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:08:56,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:08:58,458 INFO L124 PetriNetUnfolderBase]: 4282/7297 cut-off events. [2024-06-21 20:08:58,458 INFO L125 PetriNetUnfolderBase]: For 358773/358776 co-relation queries the response was YES. [2024-06-21 20:08:58,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39340 conditions, 7297 events. 4282/7297 cut-off events. For 358773/358776 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 51950 event pairs, 1033 based on Foata normal form. 4/7293 useless extension candidates. Maximal degree in co-relation 39159. Up to 5430 conditions per place. [2024-06-21 20:08:58,551 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 386 selfloop transitions, 93 changer transitions 0/486 dead transitions. [2024-06-21 20:08:58,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 486 transitions, 7105 flow [2024-06-21 20:08:58,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:08:58,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:08:58,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-21 20:08:58,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6375 [2024-06-21 20:08:58,552 INFO L175 Difference]: Start difference. First operand has 380 places, 459 transitions, 5645 flow. Second operand 6 states and 153 transitions. [2024-06-21 20:08:58,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 486 transitions, 7105 flow [2024-06-21 20:09:01,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 486 transitions, 6883 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-21 20:09:01,144 INFO L231 Difference]: Finished difference. Result has 383 places, 459 transitions, 5614 flow [2024-06-21 20:09:01,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5423, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5614, PETRI_PLACES=383, PETRI_TRANSITIONS=459} [2024-06-21 20:09:01,144 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 342 predicate places. [2024-06-21 20:09:01,144 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 459 transitions, 5614 flow [2024-06-21 20:09:01,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:01,144 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:01,144 INFO L208 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 20:09:01,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 20:09:01,145 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 20:09:01,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:01,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1907598778, now seen corresponding path program 1 times [2024-06-21 20:09:01,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:01,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473003692] [2024-06-21 20:09:01,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:01,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:01,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:09:01,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:01,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473003692] [2024-06-21 20:09:01,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473003692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:01,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:01,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:09:01,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320747115] [2024-06-21 20:09:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:09:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:09:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:09:01,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:01,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 459 transitions, 5614 flow. Second operand has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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 20:09:01,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:01,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:01,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:09:03,100 INFO L124 PetriNetUnfolderBase]: 4675/7887 cut-off events. [2024-06-21 20:09:03,101 INFO L125 PetriNetUnfolderBase]: For 804784/804784 co-relation queries the response was YES. [2024-06-21 20:09:03,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50486 conditions, 7887 events. 4675/7887 cut-off events. For 804784/804784 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 56287 event pairs, 1130 based on Foata normal form. 6/7830 useless extension candidates. Maximal degree in co-relation 50304. Up to 4131 conditions per place. [2024-06-21 20:09:03,202 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 286 selfloop transitions, 219 changer transitions 0/512 dead transitions. [2024-06-21 20:09:03,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 512 transitions, 7412 flow [2024-06-21 20:09:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:09:03,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:09:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 20:09:03,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.665625 [2024-06-21 20:09:03,203 INFO L175 Difference]: Start difference. First operand has 383 places, 459 transitions, 5614 flow. Second operand 8 states and 213 transitions. [2024-06-21 20:09:03,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 512 transitions, 7412 flow [2024-06-21 20:09:07,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 512 transitions, 7127 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 20:09:07,755 INFO L231 Difference]: Finished difference. Result has 385 places, 463 transitions, 5930 flow [2024-06-21 20:09:07,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5930, PETRI_PLACES=385, PETRI_TRANSITIONS=463} [2024-06-21 20:09:07,755 INFO L281 CegarLoopForPetriNet]: 41 programPoint places, 344 predicate places. [2024-06-21 20:09:07,756 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 463 transitions, 5930 flow [2024-06-21 20:09:07,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.0) internal successors, (128), 8 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 20:09:07,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:09:07,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:09:07,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 20:09:07,756 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 20:09:07,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:09:07,756 INFO L85 PathProgramCache]: Analyzing trace with hash 916789516, now seen corresponding path program 1 times [2024-06-21 20:09:07,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:09:07,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580495832] [2024-06-21 20:09:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:09:07,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:09:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:09:07,832 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 20:09:07,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:09:07,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580495832] [2024-06-21 20:09:07,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580495832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:09:07,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:09:07,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:09:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157542586] [2024-06-21 20:09:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:09:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:09:07,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:09:07,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:09:07,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:09:07,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-06-21 20:09:07,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 463 transitions, 5930 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:09:07,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:09:07,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-06-21 20:09:07,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand